CA2021608A1 - Compact reflector lamp unit construction - Google Patents
Compact reflector lamp unit constructionInfo
- Publication number
- CA2021608A1 CA2021608A1 CA002021608A CA2021608A CA2021608A1 CA 2021608 A1 CA2021608 A1 CA 2021608A1 CA 002021608 A CA002021608 A CA 002021608A CA 2021608 A CA2021608 A CA 2021608A CA 2021608 A1 CA2021608 A1 CA 2021608A1
- Authority
- CA
- Canada
- Prior art keywords
- reflector
- lamp unit
- electrical conductors
- unit according
- pair
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/42—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp
- H01K1/46—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp supported by a separate part, e.g. base, cap
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
- F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
Abstract
IMPROVED COMPACT REFLECTOR LAMP UNIT CONSTRUCTION ABSTRACT OF THE DISCLOSURE An improved compact reflector lamp unit is dis-closed having a construction enabling the length of the reflector bottom portion to be reduced in order to avoid light escape thereat when the lamp unit is installed in existing socket fixtures. An electrically non-conductive hollow sleeve physically connects the bottom portion of the reflector member to a hollow metal base for this pur-pose. Various lamp embodiments employing such modified structural configurations are also described.
Description
D10.041 .
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IMPROVED COMPACT REFLECTOR LAMP UNIT CONSTRUCTION
RELATED PATENT APPLICATIONS ---A copending application Serial No. 303,890, filed January 30, 1989, (Docket LD9959), and assigned to the same assignee as the present invention discloses a reflector lamp ` ~-unit construction employing a tungsten-halogen light source which utilizes a mount arrangement for said light source to ;~
improve resistance of the overall lamp unit to mechanical shock and vibration. Another copending and commonly assigned ;~
application Serial No. 331,154, filed March 31, 1989 (Docket LD10,010), discloses a related mounting arrangement for such light source in a reflector lamp unit of this type having reduced overall dimensions.
aACKGROUND OF THE INVENTION
This invention relates generally to construction of a reflector lamp unit, and more particularly to struc-~ural modification for compact reflector lamp units to en-able installation in already existing socket fixtures.
Parabolic aluminized reflector (PAR) lamps and lesser efficient, with regard to quality of beam control, as represented by reflector (R~ lamps are already kno~Jn for - ;~
general spot or floodlighting applications. The originally aesigned PAR and some R lamps had relatively large physical dimensions when compared to common incandescent lamps. The requirement for installation of said lamps into relatively large socket fixtures limited their application particularly ;
: ~
: ' LD10,041 for indoor installation. Accordingly, subsequent PAR and R
lamp designs had reduced overall dimensions while still main~
~aining the precise efficient beam control so as to increase ;~
their utilization for indoor applications. ;
In order to promote a still greater utilization of ~ -such more compact reflector lamp constructions, it becomes equally desirable that lamps be installed in existing socket fixtures of the customer. For examPlQ. installation of a compact PAR 30 lamp commonly requires such lamp to meet the spatial requirements for a "R30ANSI Box" which dictates both maximum and minimum lamp space to the fixture manufacturer.
Compliance by the lamp manufacturer with such requirements ~ ~
for the reflector lamp unit being installed is understandably ~- `
desirable so that neither customers nor fixture manufacturers are required to adjust their practices. While simply increas-ing the manufactured length of the lamp member for such lamp unit can satisfy the aforementioned installation requirements, -;
such procedure proves impractical for a number of important ~ ~ -considerations including increased lamp cost and specialized ~ ~
2û manufacturing equipment while still further requiring a pro- ~ ;liferation of lamp parts. Moreover, lengthening the bottom ;
neck portion of a reflector lamp member for compact PAR 30 lamp units now being manufactured gives rise to a further --serious problem. Specifically, the aluminized reflecting surface being deposited in the extended neck portion of the -lamp member is frequently non uniform to the extent of enabl-ing light escape thereat. Such light loss understandably proves unsightly when the installed lamp is being operated.
Extending the overall length of a reflector lamp unit during ~ -manufacture by other means thereby proves desirable. It becomes further desirable to do so in a manner not requiring a structural modification of the lamp parts already being used or that the manufacturing procedure now being employed -~
to assemble these lamp parts together be substantially altered. A known means whereby the reflector member in a -2- `
:
: .
LD10,041 ..
reflector lamD unit s physically joined to a metal screw -- ;
base ~ith an interposed plastic skirt is disclosed in further commonly assigned U.S. Patent No. 4,658,178. ~hile the over~
all length of a reflector lamp unit can apparently be increas-ed in such manner, the disclosed means for doing so requires that the lamp parts being joined together have a modified con~
struction while still further requiring modification in the customary manufacturing procedure. In the former regard, joinder between the plastic skirt and reflector member employs a complimentary engagement of finger elements provided in the skirt construction with dimples formed on the reflector mem-ber Joinder of the plastic skirt to the disclosed metal screw base includes a similar locking-type engagement between dim-ples formed in the metal base shell and indents provided the skirt member. The procedure disclosed for assembling such modified lamp parts together also departs significantly from conventional practice wherein the metal base shell is affixed to a reflector member with adhesive cement. As there-in disclosed, the plastic skirt is required to be screwed in-to the metal base shell thereby risking some deformation or mechanical failure of the lamp parts being joined together in such manner.
It is an object of the present invention, therefore, to provide an improved reflector lamp unit for installation in existing socket fixtures.
It is a further object of the present invention to provide improved means for construction of a compact reflec-tor lamp unit so that substantially all light projection pro-ceeds in the forward direction.
A still further object of the present invention is to provide such improved compact reflector lamp unit con-struction in a manner enabling relatively convenient install- - `~
ation as well as removal of the unit by the user.
It is a still further object of the present inven-tion to enable assembly of such improved compact reflector :
J ~
LD10,041 - ;;~ -~
amD unit on existing automated manufacturing equipment with-out requiring significant equipment modification.
These and still further objects of the present invention will become apparent upon considering the following detailed description for the present invention. `
,,: , :~ . ..
SUMMARY OF THE INVENTION
, ~.: : . ~ . : . :. ..
Improved structural means are provided enabling a still further size reduction of a compact reflector member to ameliorate the difficulties above pointed out in connection with conventional reflector lamp units of this type. Such structural modiFication employs an electrically non-conduc-tive hollow sleeve adhesively bonded at one end to the bottom portion of the reflector member while being adhesively bonded at the opposite end to a hollow metal screw base of the reflector lamp unit. Generally, a reflector lamp unit having said modified construction includes: (a) a reflector having an internal electrically conductive reflective surface and a longitudinally extending bottom portion, (b) a tungsten-halo-gen lamp being positioned approximately at the optical focal point of the reflector which comprises an elongated sealed envelope of light transmissive material containing an inert gas fill and a halogen substance together with a tungsten ~ ~ :
filament being suspended therein by at least one pair -~
of electrical conductors sealed at one end of the lamp envelope in a pinch seal region and protruding from the sealed envelope, (c) a hollow metal screw base affixed to the bottom portion of. the reflector with an interposed electrically non~
conductive sleeve member having a hollow internal cavity and being provided at one end with an interior contour sized and 3û shaped to accommodate insertion and physical support of the bottom reflector portion inserted thereinto while being pro-~ided at the opposite end with an external contour sized to ~-accommodate insertion of said opposite end into the hollow screw base, the sleeve member further being adhesively ~ -bonded to both bottom reflector portion and hollow screw base, . .
L010,041 ~d) means tor electrically connecting both protruding elec~
.rical conductors to the screw base, and (e) the hollow ,leeve enabling the length of the reflector bottom portion o accommoaate installation in existing socket fixtures, ,aid accommodation avoiding any significant light escape ~hereat that might otherwise occur for a longer bottom portion of said reflector. A reflector lamp unit of this type generally further includes a lens element affixed at the top portion of the reflector. Various mounting structures to physically support the tungsten-halogen lamp being employ-ed in said improved reflector lamp unit are contemplated` -~
along with various structural modifications for such light source itself. For example, physical support of the tungsten-halogen lamp can be provided entirely by the above defined protruding electrical conductors. A known lamp mount of this type connects opposite ends of the lamp filament to a first -pair of refractory metal electrical conductors with the opposite ends of said refractory metal electrical conductors being further joined to a second pair of larger diameter electrical conductors exhibiting greater thermal expansion characteristics in the pinch seal region of the lamp envelope.
Alternative lamp mount constructions employing but a single pair of refractory metal electrical conductors being connect-ed to the lamp ~ilament are also known. As disclosed in both ~5 above referenced copending applications, such latter type ~-mount construction further includes auxiliary clamp means provided in the pinch seal region of the lamp envelope to better withstand mechanical shocks and vibrations being experienced by the installed lamp. Suitable tungsten-halogen lamp constructions further include filament alignment being substantially along the central or longitudinal lamp unit axis as well as being substantially transverse thereto. In a still further contemplated modification of the present reflector lamp unit, the longitudinally extending bottom portion of the reflector terminates in at least one pair of , i , : : ~ : .. . .
i ~ :.. . .. . . . . .
:: ~
LD10,041 openings extenaing therethrough and a pair of electrically conductive post members extending through said openings for :~
connection to the pair of protruding electrical conductors. ::~
For said lamp embodiment, the outermost end of both post : .
members can terminate within the internal cavity of the hollow sleeve so as to be electrically connected thereat to . ~--additional electrical conductors emerging from opposite end -.
locations of the hollow sleeve which are electrically con~
nected to the screw base. . - ~-In one preferred embodiment, the present reflector.: .
lamp unit comprises: (a) a pressed glass concave reflector having a parabolic shaped internal electrically conductive reflective surface and a longitudinally extending conical shaped bottom portion, the bottom portion further terminating ~.1.
in at least one pair of openings extending therethrough, (b) a tungsten-halogen lamp which includes a coiled tungsten ~ ;~
filament being positioned approximately at the optical focal ~ .3 point of the reflector, the tungsten-halogen lamp further including an elongated sealed aluminosilicate glass envelope which contains a fill at superatmospheric pressure of at least one rare gas and a vaporizable halogen compound, and the tungsten filament coil being suspended at opposite ends from at least one pair of electrical conductors sealed at- ~ . :
one end of the glass envelope in a pinch seal region and pro- ~ -truding from the sealed envelope, (c) an electrically non- :
conductive sleeve member having a hollow cavity and physically securing the reflector bottom portion to a hollcw metal screw base, the sleeve member having an interior contour at one end sized and shaped to accommodate insertion and physical sup- ~ -port of the reflector bottom portion inserted thereinto while having an external contour at the opposite end sized to accommodate insertion of the opposite end into the hollow ..
screw base, the sleeve member further being adhesively bonded ;.
to both bottom reflector portion and hollow screw base, :~
(d) means for electrically connecting both protruding elec-,: :- :- -~
~ ~ r~
LDlQ.041 trical conauctors to the screw base, such means including one pair of electrically conductive post members extending through the reflector openings and connected to said pair of electric21 conductors, (e) means for securing the post mem-5 bers in said openings with an electrically non-conductive adhesive together with barrier means preventing the adhesive -~
from entering the internal reflector cavity, and (f) the hollow sleeve enabling the length of the reflector bottom ~ -portion to accommodate installation in existing socket lû fixtures, said accommodation avoiding any significant light loss thereat that might otherwise occur for a longer botto~
portion of said reflector. Both openings for the post mem- ;
bers in the lamp embodiment can be provided with an elec-trically non-conductive wafer that is joined to the reflector ~ -bottom portion at its terminal end with a ceramic cement. -~
Conductor means for electrically connecting the protruding electrical conductors in said embodiment can further include a fuse element while the hollow sleeve in said lamp embodi-ment can have channel means accommodating one of the protrud-ing electrical conductors. Modification of the parabolic reflector cavity to provide a concave elliptical contoùr is also contemplated.
PRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side view illustrating one embodiment of a compact parabolic aluminized reflector (PAR) type lamp unit according to the present invention.
FIG. 2(a) is a side view depicting one embodiment for the hollow cylindrical sleeve member employed in the -reflector lamp of FIG. 1.
FIG. 2(b) is a top view of the sleeve member . .-~
depicted in FIG. 2(a).
DETAILED DESCRIPTION ûF THE PREFERRED EMOODIMENTS
Referring to the drawings, there is depicted in FIG. 1 an improved reflector lamp unit 10 having a PAR 30 .,,, :,' .. -"
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LDl~,041 size configuration in accordance with one embodiment of the ~ p present invention. The lamp unit 10 includes a reflector 12 secured to a screw base 14 in the manner hereinafter defined and a tungsten-halogen lamp 16. The reflector 12 has an ;~
internal reflective parabolic surface 18 which may be typi~
cally a silver, aluminum or dichroic type and a bottom por-tion 2û having a longitudinally extending conical configura-tion as shown. Bottom 20 of the reflector 12 is secured to -the top end ûf a hollow non-conductive sleeve 22 which has a lû cylindrical shape while the bottom end of said sleeve 22 is similarly secured to screw base 14. As can also be seen in the drawing, bottom portion 20 of reflector 12 further in-cludes a pair of openings 24 and 26 provided with elec-trically non-conductive refractory type closure mean 28 which are secured to a central opening 29 terminating the lower end of said bottom portion 20. Reflector cavity 30 is fur- ;
thur closed at its top end with a conventional lens element 32. Physical joinder of reflector 12 to base 14 by adhesive bonding to intervening sleeve 22 enables the reflector bottom portion 20 to be materially shortened in length while essen-tially preserving the overall lamp unit length for ~ounting in existing R30 socket fixtures. To further illustrate a one-half inch shorter reflector bottom portion can now be employ-ed for the particular lamp unit being described. -Tungsten-halogen lamp 16 includes an axially aligned tungsten coil filament 31 hermetically sealed within an elongated lamp envelope 33 so as to have the center of the tungsten coil reside approximately at the optical focal point of reflector 12. Filament coil 31 is physically suspended within lamp envelope 33 by a composite assembly of -"lead wire" type electrical conductors 34, 36, 38 and 40.
More particularly, such cooperating lead wire construction employs a first pair of electrical conductors 34 and 36 con-nected at one end to the lamp filament coil 31 while being -individually connected at the opposite ends to larger dia-'~'' '' ' `'~ . ' ~'~`''' ~.
-8- - ~
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LD10,041 ~eter electrical conductors 38 and 40 in the stem press region 42 of the iamp envelope 33. For the particular size lamo embodiment being illustrated, suitable inner elec~
trical con~uctors 34 and 36 can be formed with approximately 12-30 mils diameter molybdenum alloy, whereac suitable pro-truding electrical conductors 38 and 40 can be formed with an electrically conductive metal having greater thermal expansion characteristics, such as nickel plated iron or nickel iron alloy, at approximately 35-60 mils diameter. In other lamp embodiments, a single pair of molybdenum alloy electrical conductors having a diameter up to about 25 mils ~-~
can provide suitable suspension of the lamp envelope when ;~
utilized in combination with the external clamp support means disclosed in the referenced Serial No. 331.154 application.
The depicted lamp envelope 33 further includes a gaseous fill (not shown) which includes at least one rare gas and a vaporizable halogen substance such as an alkyl halide.
Protruding electrical conductors 38 and 40 in the depicted lamp unit embodiment can be seen to extend through ~
openings 24 and 26, respectively, provided with electrically -non-conductive refractory closure means 28. As depicted in -the drawing, suitable refractory closure means 28 includes a glass or ceramic wafer 35 adhesively bonded to the terminal reflector opening 29 with an electrically non-conductive -~
refractory cement 37. Said conductors are also secured in `~
the wafer openings with said thermally resistant electrically -non-conductive cement while further refractory barrier means ~ -43 prevent said adhesive material from entering the internal -~
reflector cavity. Means are provided to electrically connect the protruding lower ends of said electrical conductors to ~ ;
the conventional type screw base 14 within the central cavity ~ -of hollow sleeve 22. More particularly, such electrical interconnection of protruding conductor 3S to the side of metal base 14 is provided with a conductor 44 whereas remain~
ing protruding conductor 4û is interconnected to a center _9_ -~:- ': ~'' 8 ~ ~ :
LD10,041 '' - ~' eyelet 46 of said metal base shell .~Jith a conductor 47. The desired interconnection can be provided by conventional metal ~astening means such as soldering, welding or staking, and it ,s contemplated that the parameters selected for conduc~
tor 47 can serve as a fuse element. While not shown in the depicted lamp unit embodiment, it becomes further possible --~
to modify the compact reflector lamp unit disclosed in the above reFerenced Serial No. 331,154 application so as to -~
employ a structural configuration according to the present invention. It can be appreciated that such a modification simply entails interposition and physical joinder, such as with an adhesive cement, of the sleeve member 22 between the reflector and screw base members therein employed. It will also be apparent that such a lamp unit modification would '~
also now employ a pair of post elements which extend upward-ly through the openings provided in the bottom section of the reflector member and with said post members being con- ' ~; ;
nected to the pair of electrical conductors protruding from one end of the suspended tungsten-halogen lamp.
2û As can further be noted in the drawing for a typical lamp unit according to the present invention after final assembly, sleeve member 22 has a particular structural configuration (to be more fully explained in connection with related FIGS. 2(a) and 2(b)) which enhances automated assembly ~' ' of the lamp parts. More particularly, an upper tapered portion ' '~
48 of the hollow sleeve member enables reflector bottom por~
tion 2û to be fitted thereinto for joinder together with con~
ventional''a'dhesive means whereas a cylindrical lower portion 50 of said sleeve enables its insertion into the hollow screw base 14 for similar joinder thereto. Additional surface - -relief features are further provided enabling these lamp components to cooperate when being joined together. A ledge or shoulder 52 located at the midsection of sleeve 22 enables ' ~-seating of said member in the hollow base shell during the ~ ' ' assembly procedure. A groove or channel 54 is further pro~
-10- ..
LD 10.041 vided on the outer surface of said sleeve member for insertion of conductor 44 thereinto. A still further protuberance or rib element 56 is located on the interior surface of said sleeve member for alignment and retention of said member to the reflector bottom portion when being assembled together. In doing so, said rib element physically interfaces with a suitable located groove or depression 21 on the exterior surface of the reflector bottom portion.
FIG. 2(a) is a side view of the hollow cylindrical sleeve member 22 employed in the FIG. 1 reflector lamp unit whereas FIG. 2(b) is a top view of the same sleeve member.
Such sleeve member can readily be formed with a thermally resistant synthetic organic polymer material, such as poly-phenylene sulfide or liquid crystal polymer, in order to resist ~ ~2 wall temperatures of 200C and higher when the depicted lampunit is being operated. As previously described, a sleeve member formed in said manner provides an upper tapered portion 48 (as shown in FIG. 2(a) joined to lower cylindrical portion 50 at a midsection shoulder or ledge 52. The interior contour of the upper tapered portion 48 is sized to accommodate insertion of the bottom reflector portion 20 thereinto for~
joinder together and which is further enhanced with an inner projection 53 being provided to physically support the inserted reflector member. The external contour of lower cylindrical portion sn is sized to accommodate its insertion into the hollow cavity provided in the metal base shell 14 with the outwardly protruding shoulder 52 extending therefrom structurally supporting the assembled configuration. A
central opening or cavity 55 extends the entire length of the depicted sleeve member to enable passage of the conductor means being selected to electrically interconnect the tungsten-halogen lamp in the reflector unit to the metal base shell. ~ -~
The channel or groove 54 (as shown in FIG. 2(b)) further provided on the exterior contour of lower cylindrical ~ -~d ~ D 8 ~ - ~
~ortion 50 enaDles one conductor 44 selected For this purpose to be inserted thereinto for terminal connection to the side -of the metal base shell. The rib element 56 of FIG. 2(b) protruding from the inner contour of upper tapered 48 is pro- ;
vided to register with a mating surface relief feature pro-vided on the exterior surface of the reflector bottom por- ~-tion and thereby help to align and retain said lamp parts together during the assembly procedure. -Fully automated manufacture of the above illus-trated reflector lamp unit can be carried out with conven- ~ ~ -tional lamp assembly equipment. In doing so, the tungsten-^~
halogen lamp 16 and reflector member 12 are first assembled together in the customary manner. Conductors 44 and 46 are ~
next secured to the protruding lamp conductors 38 and 40 by -such conventional means as soldering or welding. Sleeve 22-is then joined to the bottom portion 20 of the reflector member such as with a suitable epoxy cement. Screw base 14 is next joined to the opposite end of sleeve 22 in the same- -;
or similar manner and final electrical connection of conduc~
tors 44 and 46 is made to said base member again in the con~
ventional manner. Such lamp unit can now be installed in-existing socket fixtures. ~ ~-It will be apparent from the foregoing description~
that a generally improved compact reflector lamp unit has been provided which can be installed without further modifi~
.~ ... ..
cation in existing socket fixtures. It is contemplated that ~-modifications can be made in the lamp embodiments herein illustrated, however, without departing from the spirit and-scope of the present invention. For example, the sleeve mem~
ber construction can employ other electrically non-conductive materials including glass and ceramics. Likewise, the para-bolic reflecting surface of the reflector member herein illustrated can be provided with other already known contours while the reflective surface can be provided with stippling or a diffuse reflective coating as well as other known multi- ~ -~
LD10,041 faceted reflective configurations. Similarly, the present -~
tungsten-halogen lamp construction can include various tungsten filaments, sized and shaped for the particular ~attage and voltage requirements of the intended lamp unit applications. Moreover, already known thermal shield means can also be included in the present lamp construction.
Accordingly, it is intended to limit the present invention only by the scope of the appended claims.
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IMPROVED COMPACT REFLECTOR LAMP UNIT CONSTRUCTION
RELATED PATENT APPLICATIONS ---A copending application Serial No. 303,890, filed January 30, 1989, (Docket LD9959), and assigned to the same assignee as the present invention discloses a reflector lamp ` ~-unit construction employing a tungsten-halogen light source which utilizes a mount arrangement for said light source to ;~
improve resistance of the overall lamp unit to mechanical shock and vibration. Another copending and commonly assigned ;~
application Serial No. 331,154, filed March 31, 1989 (Docket LD10,010), discloses a related mounting arrangement for such light source in a reflector lamp unit of this type having reduced overall dimensions.
aACKGROUND OF THE INVENTION
This invention relates generally to construction of a reflector lamp unit, and more particularly to struc-~ural modification for compact reflector lamp units to en-able installation in already existing socket fixtures.
Parabolic aluminized reflector (PAR) lamps and lesser efficient, with regard to quality of beam control, as represented by reflector (R~ lamps are already kno~Jn for - ;~
general spot or floodlighting applications. The originally aesigned PAR and some R lamps had relatively large physical dimensions when compared to common incandescent lamps. The requirement for installation of said lamps into relatively large socket fixtures limited their application particularly ;
: ~
: ' LD10,041 for indoor installation. Accordingly, subsequent PAR and R
lamp designs had reduced overall dimensions while still main~
~aining the precise efficient beam control so as to increase ;~
their utilization for indoor applications. ;
In order to promote a still greater utilization of ~ -such more compact reflector lamp constructions, it becomes equally desirable that lamps be installed in existing socket fixtures of the customer. For examPlQ. installation of a compact PAR 30 lamp commonly requires such lamp to meet the spatial requirements for a "R30ANSI Box" which dictates both maximum and minimum lamp space to the fixture manufacturer.
Compliance by the lamp manufacturer with such requirements ~ ~
for the reflector lamp unit being installed is understandably ~- `
desirable so that neither customers nor fixture manufacturers are required to adjust their practices. While simply increas-ing the manufactured length of the lamp member for such lamp unit can satisfy the aforementioned installation requirements, -;
such procedure proves impractical for a number of important ~ ~ -considerations including increased lamp cost and specialized ~ ~
2û manufacturing equipment while still further requiring a pro- ~ ;liferation of lamp parts. Moreover, lengthening the bottom ;
neck portion of a reflector lamp member for compact PAR 30 lamp units now being manufactured gives rise to a further --serious problem. Specifically, the aluminized reflecting surface being deposited in the extended neck portion of the -lamp member is frequently non uniform to the extent of enabl-ing light escape thereat. Such light loss understandably proves unsightly when the installed lamp is being operated.
Extending the overall length of a reflector lamp unit during ~ -manufacture by other means thereby proves desirable. It becomes further desirable to do so in a manner not requiring a structural modification of the lamp parts already being used or that the manufacturing procedure now being employed -~
to assemble these lamp parts together be substantially altered. A known means whereby the reflector member in a -2- `
:
: .
LD10,041 ..
reflector lamD unit s physically joined to a metal screw -- ;
base ~ith an interposed plastic skirt is disclosed in further commonly assigned U.S. Patent No. 4,658,178. ~hile the over~
all length of a reflector lamp unit can apparently be increas-ed in such manner, the disclosed means for doing so requires that the lamp parts being joined together have a modified con~
struction while still further requiring modification in the customary manufacturing procedure. In the former regard, joinder between the plastic skirt and reflector member employs a complimentary engagement of finger elements provided in the skirt construction with dimples formed on the reflector mem-ber Joinder of the plastic skirt to the disclosed metal screw base includes a similar locking-type engagement between dim-ples formed in the metal base shell and indents provided the skirt member. The procedure disclosed for assembling such modified lamp parts together also departs significantly from conventional practice wherein the metal base shell is affixed to a reflector member with adhesive cement. As there-in disclosed, the plastic skirt is required to be screwed in-to the metal base shell thereby risking some deformation or mechanical failure of the lamp parts being joined together in such manner.
It is an object of the present invention, therefore, to provide an improved reflector lamp unit for installation in existing socket fixtures.
It is a further object of the present invention to provide improved means for construction of a compact reflec-tor lamp unit so that substantially all light projection pro-ceeds in the forward direction.
A still further object of the present invention is to provide such improved compact reflector lamp unit con-struction in a manner enabling relatively convenient install- - `~
ation as well as removal of the unit by the user.
It is a still further object of the present inven-tion to enable assembly of such improved compact reflector :
J ~
LD10,041 - ;;~ -~
amD unit on existing automated manufacturing equipment with-out requiring significant equipment modification.
These and still further objects of the present invention will become apparent upon considering the following detailed description for the present invention. `
,,: , :~ . ..
SUMMARY OF THE INVENTION
, ~.: : . ~ . : . :. ..
Improved structural means are provided enabling a still further size reduction of a compact reflector member to ameliorate the difficulties above pointed out in connection with conventional reflector lamp units of this type. Such structural modiFication employs an electrically non-conduc-tive hollow sleeve adhesively bonded at one end to the bottom portion of the reflector member while being adhesively bonded at the opposite end to a hollow metal screw base of the reflector lamp unit. Generally, a reflector lamp unit having said modified construction includes: (a) a reflector having an internal electrically conductive reflective surface and a longitudinally extending bottom portion, (b) a tungsten-halo-gen lamp being positioned approximately at the optical focal point of the reflector which comprises an elongated sealed envelope of light transmissive material containing an inert gas fill and a halogen substance together with a tungsten ~ ~ :
filament being suspended therein by at least one pair -~
of electrical conductors sealed at one end of the lamp envelope in a pinch seal region and protruding from the sealed envelope, (c) a hollow metal screw base affixed to the bottom portion of. the reflector with an interposed electrically non~
conductive sleeve member having a hollow internal cavity and being provided at one end with an interior contour sized and 3û shaped to accommodate insertion and physical support of the bottom reflector portion inserted thereinto while being pro-~ided at the opposite end with an external contour sized to ~-accommodate insertion of said opposite end into the hollow screw base, the sleeve member further being adhesively ~ -bonded to both bottom reflector portion and hollow screw base, . .
L010,041 ~d) means tor electrically connecting both protruding elec~
.rical conductors to the screw base, and (e) the hollow ,leeve enabling the length of the reflector bottom portion o accommoaate installation in existing socket fixtures, ,aid accommodation avoiding any significant light escape ~hereat that might otherwise occur for a longer bottom portion of said reflector. A reflector lamp unit of this type generally further includes a lens element affixed at the top portion of the reflector. Various mounting structures to physically support the tungsten-halogen lamp being employ-ed in said improved reflector lamp unit are contemplated` -~
along with various structural modifications for such light source itself. For example, physical support of the tungsten-halogen lamp can be provided entirely by the above defined protruding electrical conductors. A known lamp mount of this type connects opposite ends of the lamp filament to a first -pair of refractory metal electrical conductors with the opposite ends of said refractory metal electrical conductors being further joined to a second pair of larger diameter electrical conductors exhibiting greater thermal expansion characteristics in the pinch seal region of the lamp envelope.
Alternative lamp mount constructions employing but a single pair of refractory metal electrical conductors being connect-ed to the lamp ~ilament are also known. As disclosed in both ~5 above referenced copending applications, such latter type ~-mount construction further includes auxiliary clamp means provided in the pinch seal region of the lamp envelope to better withstand mechanical shocks and vibrations being experienced by the installed lamp. Suitable tungsten-halogen lamp constructions further include filament alignment being substantially along the central or longitudinal lamp unit axis as well as being substantially transverse thereto. In a still further contemplated modification of the present reflector lamp unit, the longitudinally extending bottom portion of the reflector terminates in at least one pair of , i , : : ~ : .. . .
i ~ :.. . .. . . . . .
:: ~
LD10,041 openings extenaing therethrough and a pair of electrically conductive post members extending through said openings for :~
connection to the pair of protruding electrical conductors. ::~
For said lamp embodiment, the outermost end of both post : .
members can terminate within the internal cavity of the hollow sleeve so as to be electrically connected thereat to . ~--additional electrical conductors emerging from opposite end -.
locations of the hollow sleeve which are electrically con~
nected to the screw base. . - ~-In one preferred embodiment, the present reflector.: .
lamp unit comprises: (a) a pressed glass concave reflector having a parabolic shaped internal electrically conductive reflective surface and a longitudinally extending conical shaped bottom portion, the bottom portion further terminating ~.1.
in at least one pair of openings extending therethrough, (b) a tungsten-halogen lamp which includes a coiled tungsten ~ ;~
filament being positioned approximately at the optical focal ~ .3 point of the reflector, the tungsten-halogen lamp further including an elongated sealed aluminosilicate glass envelope which contains a fill at superatmospheric pressure of at least one rare gas and a vaporizable halogen compound, and the tungsten filament coil being suspended at opposite ends from at least one pair of electrical conductors sealed at- ~ . :
one end of the glass envelope in a pinch seal region and pro- ~ -truding from the sealed envelope, (c) an electrically non- :
conductive sleeve member having a hollow cavity and physically securing the reflector bottom portion to a hollcw metal screw base, the sleeve member having an interior contour at one end sized and shaped to accommodate insertion and physical sup- ~ -port of the reflector bottom portion inserted thereinto while having an external contour at the opposite end sized to accommodate insertion of the opposite end into the hollow ..
screw base, the sleeve member further being adhesively bonded ;.
to both bottom reflector portion and hollow screw base, :~
(d) means for electrically connecting both protruding elec-,: :- :- -~
~ ~ r~
LDlQ.041 trical conauctors to the screw base, such means including one pair of electrically conductive post members extending through the reflector openings and connected to said pair of electric21 conductors, (e) means for securing the post mem-5 bers in said openings with an electrically non-conductive adhesive together with barrier means preventing the adhesive -~
from entering the internal reflector cavity, and (f) the hollow sleeve enabling the length of the reflector bottom ~ -portion to accommodate installation in existing socket lû fixtures, said accommodation avoiding any significant light loss thereat that might otherwise occur for a longer botto~
portion of said reflector. Both openings for the post mem- ;
bers in the lamp embodiment can be provided with an elec-trically non-conductive wafer that is joined to the reflector ~ -bottom portion at its terminal end with a ceramic cement. -~
Conductor means for electrically connecting the protruding electrical conductors in said embodiment can further include a fuse element while the hollow sleeve in said lamp embodi-ment can have channel means accommodating one of the protrud-ing electrical conductors. Modification of the parabolic reflector cavity to provide a concave elliptical contoùr is also contemplated.
PRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side view illustrating one embodiment of a compact parabolic aluminized reflector (PAR) type lamp unit according to the present invention.
FIG. 2(a) is a side view depicting one embodiment for the hollow cylindrical sleeve member employed in the -reflector lamp of FIG. 1.
FIG. 2(b) is a top view of the sleeve member . .-~
depicted in FIG. 2(a).
DETAILED DESCRIPTION ûF THE PREFERRED EMOODIMENTS
Referring to the drawings, there is depicted in FIG. 1 an improved reflector lamp unit 10 having a PAR 30 .,,, :,' .. -"
~: '''.
~ ~ 2 ~ $ ~
LDl~,041 size configuration in accordance with one embodiment of the ~ p present invention. The lamp unit 10 includes a reflector 12 secured to a screw base 14 in the manner hereinafter defined and a tungsten-halogen lamp 16. The reflector 12 has an ;~
internal reflective parabolic surface 18 which may be typi~
cally a silver, aluminum or dichroic type and a bottom por-tion 2û having a longitudinally extending conical configura-tion as shown. Bottom 20 of the reflector 12 is secured to -the top end ûf a hollow non-conductive sleeve 22 which has a lû cylindrical shape while the bottom end of said sleeve 22 is similarly secured to screw base 14. As can also be seen in the drawing, bottom portion 20 of reflector 12 further in-cludes a pair of openings 24 and 26 provided with elec-trically non-conductive refractory type closure mean 28 which are secured to a central opening 29 terminating the lower end of said bottom portion 20. Reflector cavity 30 is fur- ;
thur closed at its top end with a conventional lens element 32. Physical joinder of reflector 12 to base 14 by adhesive bonding to intervening sleeve 22 enables the reflector bottom portion 20 to be materially shortened in length while essen-tially preserving the overall lamp unit length for ~ounting in existing R30 socket fixtures. To further illustrate a one-half inch shorter reflector bottom portion can now be employ-ed for the particular lamp unit being described. -Tungsten-halogen lamp 16 includes an axially aligned tungsten coil filament 31 hermetically sealed within an elongated lamp envelope 33 so as to have the center of the tungsten coil reside approximately at the optical focal point of reflector 12. Filament coil 31 is physically suspended within lamp envelope 33 by a composite assembly of -"lead wire" type electrical conductors 34, 36, 38 and 40.
More particularly, such cooperating lead wire construction employs a first pair of electrical conductors 34 and 36 con-nected at one end to the lamp filament coil 31 while being -individually connected at the opposite ends to larger dia-'~'' '' ' `'~ . ' ~'~`''' ~.
-8- - ~
'~
~ ~3 ~
LD10,041 ~eter electrical conductors 38 and 40 in the stem press region 42 of the iamp envelope 33. For the particular size lamo embodiment being illustrated, suitable inner elec~
trical con~uctors 34 and 36 can be formed with approximately 12-30 mils diameter molybdenum alloy, whereac suitable pro-truding electrical conductors 38 and 40 can be formed with an electrically conductive metal having greater thermal expansion characteristics, such as nickel plated iron or nickel iron alloy, at approximately 35-60 mils diameter. In other lamp embodiments, a single pair of molybdenum alloy electrical conductors having a diameter up to about 25 mils ~-~
can provide suitable suspension of the lamp envelope when ;~
utilized in combination with the external clamp support means disclosed in the referenced Serial No. 331.154 application.
The depicted lamp envelope 33 further includes a gaseous fill (not shown) which includes at least one rare gas and a vaporizable halogen substance such as an alkyl halide.
Protruding electrical conductors 38 and 40 in the depicted lamp unit embodiment can be seen to extend through ~
openings 24 and 26, respectively, provided with electrically -non-conductive refractory closure means 28. As depicted in -the drawing, suitable refractory closure means 28 includes a glass or ceramic wafer 35 adhesively bonded to the terminal reflector opening 29 with an electrically non-conductive -~
refractory cement 37. Said conductors are also secured in `~
the wafer openings with said thermally resistant electrically -non-conductive cement while further refractory barrier means ~ -43 prevent said adhesive material from entering the internal -~
reflector cavity. Means are provided to electrically connect the protruding lower ends of said electrical conductors to ~ ;
the conventional type screw base 14 within the central cavity ~ -of hollow sleeve 22. More particularly, such electrical interconnection of protruding conductor 3S to the side of metal base 14 is provided with a conductor 44 whereas remain~
ing protruding conductor 4û is interconnected to a center _9_ -~:- ': ~'' 8 ~ ~ :
LD10,041 '' - ~' eyelet 46 of said metal base shell .~Jith a conductor 47. The desired interconnection can be provided by conventional metal ~astening means such as soldering, welding or staking, and it ,s contemplated that the parameters selected for conduc~
tor 47 can serve as a fuse element. While not shown in the depicted lamp unit embodiment, it becomes further possible --~
to modify the compact reflector lamp unit disclosed in the above reFerenced Serial No. 331,154 application so as to -~
employ a structural configuration according to the present invention. It can be appreciated that such a modification simply entails interposition and physical joinder, such as with an adhesive cement, of the sleeve member 22 between the reflector and screw base members therein employed. It will also be apparent that such a lamp unit modification would '~
also now employ a pair of post elements which extend upward-ly through the openings provided in the bottom section of the reflector member and with said post members being con- ' ~; ;
nected to the pair of electrical conductors protruding from one end of the suspended tungsten-halogen lamp.
2û As can further be noted in the drawing for a typical lamp unit according to the present invention after final assembly, sleeve member 22 has a particular structural configuration (to be more fully explained in connection with related FIGS. 2(a) and 2(b)) which enhances automated assembly ~' ' of the lamp parts. More particularly, an upper tapered portion ' '~
48 of the hollow sleeve member enables reflector bottom por~
tion 2û to be fitted thereinto for joinder together with con~
ventional''a'dhesive means whereas a cylindrical lower portion 50 of said sleeve enables its insertion into the hollow screw base 14 for similar joinder thereto. Additional surface - -relief features are further provided enabling these lamp components to cooperate when being joined together. A ledge or shoulder 52 located at the midsection of sleeve 22 enables ' ~-seating of said member in the hollow base shell during the ~ ' ' assembly procedure. A groove or channel 54 is further pro~
-10- ..
LD 10.041 vided on the outer surface of said sleeve member for insertion of conductor 44 thereinto. A still further protuberance or rib element 56 is located on the interior surface of said sleeve member for alignment and retention of said member to the reflector bottom portion when being assembled together. In doing so, said rib element physically interfaces with a suitable located groove or depression 21 on the exterior surface of the reflector bottom portion.
FIG. 2(a) is a side view of the hollow cylindrical sleeve member 22 employed in the FIG. 1 reflector lamp unit whereas FIG. 2(b) is a top view of the same sleeve member.
Such sleeve member can readily be formed with a thermally resistant synthetic organic polymer material, such as poly-phenylene sulfide or liquid crystal polymer, in order to resist ~ ~2 wall temperatures of 200C and higher when the depicted lampunit is being operated. As previously described, a sleeve member formed in said manner provides an upper tapered portion 48 (as shown in FIG. 2(a) joined to lower cylindrical portion 50 at a midsection shoulder or ledge 52. The interior contour of the upper tapered portion 48 is sized to accommodate insertion of the bottom reflector portion 20 thereinto for~
joinder together and which is further enhanced with an inner projection 53 being provided to physically support the inserted reflector member. The external contour of lower cylindrical portion sn is sized to accommodate its insertion into the hollow cavity provided in the metal base shell 14 with the outwardly protruding shoulder 52 extending therefrom structurally supporting the assembled configuration. A
central opening or cavity 55 extends the entire length of the depicted sleeve member to enable passage of the conductor means being selected to electrically interconnect the tungsten-halogen lamp in the reflector unit to the metal base shell. ~ -~
The channel or groove 54 (as shown in FIG. 2(b)) further provided on the exterior contour of lower cylindrical ~ -~d ~ D 8 ~ - ~
~ortion 50 enaDles one conductor 44 selected For this purpose to be inserted thereinto for terminal connection to the side -of the metal base shell. The rib element 56 of FIG. 2(b) protruding from the inner contour of upper tapered 48 is pro- ;
vided to register with a mating surface relief feature pro-vided on the exterior surface of the reflector bottom por- ~-tion and thereby help to align and retain said lamp parts together during the assembly procedure. -Fully automated manufacture of the above illus-trated reflector lamp unit can be carried out with conven- ~ ~ -tional lamp assembly equipment. In doing so, the tungsten-^~
halogen lamp 16 and reflector member 12 are first assembled together in the customary manner. Conductors 44 and 46 are ~
next secured to the protruding lamp conductors 38 and 40 by -such conventional means as soldering or welding. Sleeve 22-is then joined to the bottom portion 20 of the reflector member such as with a suitable epoxy cement. Screw base 14 is next joined to the opposite end of sleeve 22 in the same- -;
or similar manner and final electrical connection of conduc~
tors 44 and 46 is made to said base member again in the con~
ventional manner. Such lamp unit can now be installed in-existing socket fixtures. ~ ~-It will be apparent from the foregoing description~
that a generally improved compact reflector lamp unit has been provided which can be installed without further modifi~
.~ ... ..
cation in existing socket fixtures. It is contemplated that ~-modifications can be made in the lamp embodiments herein illustrated, however, without departing from the spirit and-scope of the present invention. For example, the sleeve mem~
ber construction can employ other electrically non-conductive materials including glass and ceramics. Likewise, the para-bolic reflecting surface of the reflector member herein illustrated can be provided with other already known contours while the reflective surface can be provided with stippling or a diffuse reflective coating as well as other known multi- ~ -~
LD10,041 faceted reflective configurations. Similarly, the present -~
tungsten-halogen lamp construction can include various tungsten filaments, sized and shaped for the particular ~attage and voltage requirements of the intended lamp unit applications. Moreover, already known thermal shield means can also be included in the present lamp construction.
Accordingly, it is intended to limit the present invention only by the scope of the appended claims.
.',' . ".''.",'.' ....~' .
,,, :~
'"'-"`""' ' ~.. ~ :-, ., . -:, ::: - ,::
-' , . ,. .,;
..',:",.",,",.'.-.
. . .
.. . ..
' ~: :' . . .
~ ~ -'~'; .:
:~
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Claims (22)
1. A reflector lamp unit comprising:
(a) a reflector having an internal electrically conductive reflective surface and a longitudinally extending bottom portion, (b) a tungsten-halogen lamp being positioned approximately at the optical focal point of the reflector which comprises an elongated sealed envelope of light trans-missive material containing an inert gas fill and a halogen substance together with a tungsten filament being suspended therein from at least one pair of electrical conductors sealed at one end of the lamp envelope in a pinch seal region and protruding from the sealed envelope, (c) a sleeve member having a hollow internal cavity and being provided with an interior contour at one end sized and shaped to accommodate insertion and physical support of the bottom reflector portion inserted thereinto while being provided at the opposite end with an external contour sized to accommodate insertion of said opposite end into the hollow screw base, the sleeve member further being adhesively bonded to both bottom reflector portion and hollow screw base, (d) means for electrically connecting both pro-truding electrical conductors to the screw base, and (e) the sleeve member enabling the length of the-reflector bottom portion to accommodate installation in existing socket fixtures, said accommodation avoiding any significant light escape that might otherwise occur for a longer bottom portion of said reflector.
(a) a reflector having an internal electrically conductive reflective surface and a longitudinally extending bottom portion, (b) a tungsten-halogen lamp being positioned approximately at the optical focal point of the reflector which comprises an elongated sealed envelope of light trans-missive material containing an inert gas fill and a halogen substance together with a tungsten filament being suspended therein from at least one pair of electrical conductors sealed at one end of the lamp envelope in a pinch seal region and protruding from the sealed envelope, (c) a sleeve member having a hollow internal cavity and being provided with an interior contour at one end sized and shaped to accommodate insertion and physical support of the bottom reflector portion inserted thereinto while being provided at the opposite end with an external contour sized to accommodate insertion of said opposite end into the hollow screw base, the sleeve member further being adhesively bonded to both bottom reflector portion and hollow screw base, (d) means for electrically connecting both pro-truding electrical conductors to the screw base, and (e) the sleeve member enabling the length of the-reflector bottom portion to accommodate installation in existing socket fixtures, said accommodation avoiding any significant light escape that might otherwise occur for a longer bottom portion of said reflector.
2. A reflector lamp unit according to claim 1 further including a lens element affixed to the top portion of the reflector.
3. A reflector lamp unit according to claim 1 wherein physical support of the tungsten-halogen lamp is provided entirely by the protruding electrical conductors.
4. A reflector lamp unit according to claim 1 wherein the tungsten filament is connected at opposite ends to a single pair of refractory metal electrical conductors hermetically sealed at the pinch seal region of the lamp envelope.
5. A reflector lamp unit according to claim 1 wherein the tungsten filament is connected at opposite ends to a first pair of refractory metal electrical conductors with the opposite end of the refractory metal electrical conductors being further joined to a second pair of larger diameter electrical codnuctors exhibiting greater thermal expansion characteristics.
6. A reflector lamp unit according to claim 1 wherein the longitudinally extending bottom portion of the reflector terminates in at least one pair of openings extend-ing therethrough and a pair of electrically conductive post members extending through the openings for connection to the pair of electrical conductors.
7. A reflector lamp unit according to claim 6 wherein the outermost end of both post members terminate within the internal cavity of the hollow sleeve and are electrically connected thereat to additional electrical conductors emerging at opposite end locations of the hollow sleeve for electrical connection to the screw base.
8. A reflector lamp unit according to claim 6 wherein the top portion of the post openings is devoid of an electrically conductive reflective surface.
9. A reflector lamp unit according to claim 6 wherein the post members are secured in the openings with an electrically non-conductive adhesive material and barrier means are provided to prevent the adhesive from entering the internal reflector cavity.
10. A reflector lamp unit according to claim 1 wherein the bottom portion of the reflector and hollow sleeve are provided with cooperating surface relief means to help in being affixed and aligned together.
11. A reflector lamp unit according to claim 1 wherein the tungsten filament is axially aligned substan-tially along the central lamp unit axis.
12. A reflector lamp unit according to claim 1 wherein the sleeve member is formed with a thermally resis-tant synthetic organic polymer material.
13. A reflector lamp unit according to claim 1 wherein the sleeve member includes a groove accommodating passage of the means for electrically connecting the pro-truding electrical conductors to the screw base.
14. A reflector lamp unit comprising:
(a) a reflector being pressed glass and having a parabolic shaped internal electrically conductive reflective surface which terminates in a longitudinally extending conically shaped bottom portion having a pair of openings extending therethrough, (b) a tungsten-halogen lamp which includes a coiled tungsten filament being positioned approximately at the optical focal point of the reflector, the tungsten-halogen lamp further including an elongated sealed aluminosilicate glass envelope which contains a fill at superatmospheric pressure of at least one rare gas and a vaporizable halogen compound, and the tungsten filament coil being suspended at opposite ends from at least one pair of electrical conductors sealed at one end of the glass envelope in a pinch seal region and protruding from the sealed envelope, (c) an electrically non-conductive sleeve member having a hollow internal cavity and being provided with an interior contour at one end sized and shaped to accommodate insertion and physical support of the bottom reflector por-tion inserted thereinto while being provided at the opposite end with an external contour sized to accommodate insertion of said opposite end into a hollow screw base, the sleeve member further being adhesively bonded to both bottom reflec-tor portion and hollow screw base, (d) means for electrically connecting both protrud-ing electrical conductors to the screw base being located within the internal cavity of the hollow sleeve, such means including at least one pair of electrically conductive post members extending through the reflector openings and con-nected to said pair of electrical conductors, (e) means for securing the post members in said openings with an electrically non-conductive adhesive together with barrier means preventing the adhesive from entering the internal reflector cavity, and (f) the hollow sleeve enabling the length of the reflector bottom portion to accommodate installation in existing socket fixtures, such accommodation avoiding any significant light loss thereat that might otherwise occur for a longer bottom portion of said reflector.
(a) a reflector being pressed glass and having a parabolic shaped internal electrically conductive reflective surface which terminates in a longitudinally extending conically shaped bottom portion having a pair of openings extending therethrough, (b) a tungsten-halogen lamp which includes a coiled tungsten filament being positioned approximately at the optical focal point of the reflector, the tungsten-halogen lamp further including an elongated sealed aluminosilicate glass envelope which contains a fill at superatmospheric pressure of at least one rare gas and a vaporizable halogen compound, and the tungsten filament coil being suspended at opposite ends from at least one pair of electrical conductors sealed at one end of the glass envelope in a pinch seal region and protruding from the sealed envelope, (c) an electrically non-conductive sleeve member having a hollow internal cavity and being provided with an interior contour at one end sized and shaped to accommodate insertion and physical support of the bottom reflector por-tion inserted thereinto while being provided at the opposite end with an external contour sized to accommodate insertion of said opposite end into a hollow screw base, the sleeve member further being adhesively bonded to both bottom reflec-tor portion and hollow screw base, (d) means for electrically connecting both protrud-ing electrical conductors to the screw base being located within the internal cavity of the hollow sleeve, such means including at least one pair of electrically conductive post members extending through the reflector openings and con-nected to said pair of electrical conductors, (e) means for securing the post members in said openings with an electrically non-conductive adhesive together with barrier means preventing the adhesive from entering the internal reflector cavity, and (f) the hollow sleeve enabling the length of the reflector bottom portion to accommodate installation in existing socket fixtures, such accommodation avoiding any significant light loss thereat that might otherwise occur for a longer bottom portion of said reflector.
15. A reflector lamp unit according to claim 14 further including a lens element affixed to the top portion of the reflector.
16. A reflector lamp unit according to claim 14 wherein physical support of the tungsten-halogen lamp is provided entirely by the protruding electrical conductors.
17. A reflector lamp unit according to claim 14 wherein the tungsten filament is axially aligned substan-tially along the central lamp unit axis and connected at-opposite ends to a single pair of refractory metal electrical conductors hermetically sealed at the pinch seal region of the glass envelope.
18. A reflector lamp unit according to claim 14 wherein the tungsten filament is axially aligned substan-tially along the central lamp unit axis and connected at opposite ends to a first pair of refractory metal electrical conductors with the opposite end of the refractory metal electrical conductor being further joined to a second pair of larger diameter electrical conductors exhibiting greater thermal expansion characteristics.
19. A reflector lamp unit according to claim 14 wherein the openings for the post members are provided with an electrically non-conductive wafer that is sealed to the reflector bottom portion at its terminal end.
20. A reflector lamp unit according to claim 14 wherein the means for electrically connecting the protruding electrical conductors further includes a fuse element.
21. A reflector lamp unit according to claim 14 wherein the hollow sleeve further includes an external sur-face channel accommodating one of the protruding electrical conductors.
22. The invention as defined in any of the preceding claims including any further features of novelty disclosed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US42144789A | 1989-10-13 | 1989-10-13 | |
| US421,447 | 1989-10-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2021608A1 true CA2021608A1 (en) | 1991-04-14 |
Family
ID=23670554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002021608A Abandoned CA2021608A1 (en) | 1989-10-13 | 1990-07-19 | Compact reflector lamp unit construction |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0422936A3 (en) |
| JP (1) | JPH03179658A (en) |
| CA (1) | CA2021608A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0543448B1 (en) * | 1991-11-18 | 1999-07-14 | Koninklijke Philips Electronics N.V. | Electric reflector lamp |
| US5367219A (en) * | 1991-11-18 | 1994-11-22 | U.S. Philips Corporation | Electric reflector lamp for use with IEC standard |
| DE10146877A1 (en) * | 2001-09-24 | 2003-04-17 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | reflector lamp |
| EP1439562A3 (en) * | 2003-01-15 | 2006-02-01 | Vitri Electro-Metalurgica S.A. | Manufacturing process for electric lightbulb caps |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2406271A (en) * | 1942-01-30 | 1946-08-20 | Gen Electric | Base for electric lamps or similar devices |
| GB1054423A (en) * | 1963-04-22 | |||
| US4658178A (en) * | 1984-12-14 | 1987-04-14 | General Electric Company | Plastics skirt for rigidly interconnecting metallic base and glass envelope of a lamp |
| JPH0636358B2 (en) * | 1985-03-11 | 1994-05-11 | 稔 西堀 | How to attach the bulb body to the bulb case |
| JPS61216233A (en) * | 1985-03-20 | 1986-09-25 | 松下電子工業株式会社 | Halogen bulb with mirror |
| US4829210A (en) * | 1987-01-23 | 1989-05-09 | Gte Products Corporation | Multifunctional structural member and reflector lamp employing same |
-
1990
- 1990-07-19 CA CA002021608A patent/CA2021608A1/en not_active Abandoned
- 1990-10-11 EP EP19900311147 patent/EP0422936A3/en not_active Withdrawn
- 1990-10-12 JP JP2272533A patent/JPH03179658A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0422936A3 (en) | 1991-08-21 |
| JPH03179658A (en) | 1991-08-05 |
| EP0422936A2 (en) | 1991-04-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 19930119 |