US3904909A - Pinch-sealed electric lamps - Google Patents
Pinch-sealed electric lamps Download PDFInfo
- Publication number
- US3904909A US3904909A US411698A US41169873A US3904909A US 3904909 A US3904909 A US 3904909A US 411698 A US411698 A US 411698A US 41169873 A US41169873 A US 41169873A US 3904909 A US3904909 A US 3904909A
- Authority
- US
- United States
- Prior art keywords
- lamp
- metal members
- pinch
- seal
- pinch seal
- 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.)
- Expired - Lifetime
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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
- H01K1/44—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp directly applied to, or forming part of, the vessel
Definitions
- ABSTRACT 52 us. c1. 313/318; 29/251; 174/5052; A filament or discharge lamp with a pinch sea] at an 313/274; 339/102 L; 339/198 E end of the envelope has shaped metal members [51] Int.
- the present invention relates to the manufacture of electric lamps having light sources contained in hermetically closed envelopes the envelopes having pinch seals.
- the light sources can be incandescent filaments or are discharges.
- the principal aim of this invention is the provision of inexpensive means which assist in establishing accurate orientation of a light source relative to optical components with which it may be associated in service.
- optical components include reflectors, shields and gates.
- an electric lamp having an envelope with a pinch seal and shaped metal members secured to the external faces of the pinch seal'by pressing of parts of the metal members into the material of the pinch seal whereby there is mechanical co-operation of the said material with the metal members to hold the metal members in a definite position relative to the internal components of the lamp.
- a method of making a lamp having a vitreous envelope includes the steps of heating an end portion of the envelope until it is plastically deformable and thereafter pressing the end part upon itself to define a pinch seal, shaped metal members being applied to the pinch seal such that parts of the members become embedded therein with the remainder of each member exposed.
- the shaped metal members may be provided with discrete projecting tangs to be forced into the press seal while the latter is in a plastic state.
- the shaped metal members can have turned-over edges which are forced into the press seal.
- the metal members can be punched or pierced to form holes preferably having rough or ragged edges which project outwardly from the members. With such a con struction, the ragged projecting edges can be embedded in the pinch-seal while the vitreous material of the seal can extrude into the holes. During the pressing operation, the extruding material can mushroom as it emerges from the holes, thereby formly securing the metal member to the pinch-seal.
- the shaped metal members which are secured to the pinch-seal may conveniently enable a lamp cap to be fastened to the envelope. In this way, the use of cements can be avoided thereby making temperatureresisting anchorage of the cap possible.
- the lamp need not, of course, be intended for use in a sealed beam unit. Instead, it can be a replaceable plug-in bulb for usewith a socket which is part of optical apparatus e.g. an image projector, a spot or floodlight, or a vehicle headlamp. In such apparatus, the socket would already be in a proper orientation with respect to a reflector, gate and the like. It is then necessary to ensure that the lamp-bulb will always seat accurately in the socket.
- the exposed part of each shaped metal member may, in one instance, be in the form of a strip designed to mate with accomodating keying structures such as recesses in the socket.
- FIGS. 1 and 2 are two partial perspective views of a lamp primarily intended for installing in a sealed-beam lighting unit
- FIG. 3 is a partial side elevation of the lamp shown in FIGS. 1 and 2,
- FIGS. 4, 5 and 6 are perspective, end and side elevations of a baseless electric lamp, only part of which is illustrated,
- FIG. 7 is a side elevation of an H-2 type lamp embodying the invention.
- FIG. 8 is a side elevation partly in cross-section of a capped lamp embodying the invention.
- the lamp partially shown in FIGS. 1 to 3 is intended to form one of the components of a sealed-beam unit.
- the remaining components which include rear reflector and front lens elements are not illustrated. It is necessary, when making a sealed-beam unit, to be able to position the light source or lamp accurately relative to these, and possibly other elements such as gates.
- the members 10 are in the form of brackets having leg portions 11 and foot portions 12.
- the feet 12 are apertured to allow the members 10 to be secured to the rear reflector element of a sealed-beam unit.
- the length of the legs 11 is such that they support the lamp clear of the rear reflector element with the lamp filament at a predetermined position, e.g. coincident with the focus of the reflector.
- the apertures 13 permit the mounting of the feet 12 on accurately-located studs or similar formations on the rear reflector element.
- Our copending British patent application Ser. No. 44240/72, filed on Sept. 25, 1972' and entitled Sealed Beam Lamp Construction” envisages such a lamp mounting, and further details may be found therein.
- the members 10 are arranged to act as current carriers to the lamp and accordingly the said studs are designed to be connectable to an external electricity supply.
- the lamp has a plurality of lead-in conductors 15 which extend through a pinch seal 16 from the exterior 3 of thelamp to. the,.in,terior .o f,.its vitreous envelopb 17,.
- the conductors 15 are each soldered-. ,brazed .or erimpeduto arespective legll'. f ,-Each-i rnember; 10 ha5s projectingportions 18 which are.
- the remainingparts of the members being exposed on the,surfaces, of the pinchaseal tld fl hc projectingportions-18 may bc formed b rolling: orbending edges of the-members ,10 inwa fd y j iAs sliown here, the portions; 18; are in .the formiof dQveTtaiIedtan-gs.
- the membersr30 are-again attached to ,the exterior of .a pinch-seal 531 formed at OnGsfiDIldOfithC lamp envelope 32.
- the members 30 are elongated strips intended to mate with keying grooves of an associated socket. The longedges 31of' the members 30 are turned, inwardly and embedded in the pinch seal 32. Lead-inconductors 35.aresealed into-the envelopc33 by the pinch seal 32, theirends being connected to the members 30.
- the connections are made by suitable means such as soldering;-lwel,ding o'r crimping the members-30 about the conductors 35.
- the members30 have the advantage that, being large relative to;the conductors 35, they are, easily coupled with mating contacts within the associated socket. Theirs-ize facilitates efficient coupling withthe mating contacts so that they are suitable for. high currentzloadlng t l. "'3 F1;
- internal eomponents such as filamentsand disc harge e'lectnodes are attached toappropriate mounts to-which the leadin conductors. l5, and 35aresecured.
- the mounts are then installed, through-initially open ends of the envel- Opes-1:7 ,3-3. Thereafter, the-ends of theenvelopes 17,33 atek heated to, -soften the vitreous material, whereupon the ends-are closed upon themselves, by pinch jaws to form the pinch seals. 16,32. l
- the pinch seals 16,32 may need reheating to render. them soft enough to accept the projections ,-.EIG. .7 showsga tungsten-halogen lamp'em'bodying the invention for use in automobile headlamps.
- the lamp 40. has'a pinch-seal 41. through which extend :leads'42 to. azfilame'nt 43.
- the pinch-seal, 41 is flattened inlthe planez ofthe drawingandto its opposite facesitwo members ;44,45 "are seeurcd to; 3 the. material. of -.the
- the metal members 44,45 are shaped such that they correctly centre and align the lamp 40 in optical apparatus including a reflectorand lens when the lamp is installedin a holder designed therefor.
- the members 44,45 are apertured at 47 and notched at 48.
- Thc apcrture 47 and notch 48 co-operate with locating formations in the holder to position the lamp 40 with accuracy laterally and longitudinally relative to referencepoints associated with a lens or reflector of the optical apparatus, a'swillbe familiar to designers of lamps and optical apparatus.
- One face'of the pinchseal 41 is provided with an axially-aligned ridge 49 located adjacent the member 44.
- This ridge 49 may co-opcrate with a keying structure in the holder to locate the lamp 40 accurately with respect to the optical axis of the apparatus.
- a similar ridge may,if desired, be provided in the opposite face of the pinch-seal 41.
- the ridge or ridges can be formed by shap'ed 'metal members 'as described above in rela- "tion to FIGS. 4, 5 and 6.
- FIG. '8 shows a lamp 50 provided with a metal base or cap 51.
- the cap 51 is attached by welding or the like to a pair of transversemetal members 52 which are attached to a pinch seal 53.
- the transverse members 52 are attached to the pinch-seal'53 in the same way as the members 44, 45 are attached to the pinch-seal 41 as shown in FIG. 7.
- An insulating disc 54 forms the bottom of the cap 51 and carries a pair of contact pads 55. Lcad in conductors 56 are electrically connected to the pads '55 and extend into the pinch seal 53 for connection to a filament 57 in a conventional manner.
- This arrangement provides a cement-free attachment of the cap 51 to the lamp 50 which is effectively temperature resistant and also facilitates the manufacture of prefocus lamps.
- the cap 51 is shown having a form suited to bayonet-type lamp-holders, it will be recognised that the cap 51 could readily be made to suit a screw-type lamp-holder or could form a pre-focus base.
- An electric lamp having internal components, said lamp'cornprising l ,7 I i an envelope with a pinch seal;
- metal embers secured to the rial of the pinch seal by pressing said portions into said material in mechanical engagement therewith to hold the metal members in a predetermined position relative to the internal components of the lamp.
- each of said one or more metal members has the form of a plate, said portions which are embedded in the material of the pinch seal projecting from the plate.
- each plate is formed with an integral lug, the lugs extending substantially in a common plane and being adapted to support the lamp.
- a lamp as claimed in claim 2 in which said portions projecting from each plate are bent-up edges of the plate.
- a lamp as claimed in claim 4 in which there are two metal members attached to opposite faces of the press-seal each being in the form of an elongated plate with its longitudinal edges bent up to form a channel member, the said edges of said portions are embedded in the material of the press.
- each of said one or more metal members has one or more apertures, the material of the pinch seal being extruded through and engaging the edges of said one or more apertures to secure each of said one or more metal members in its predetermined position.
- a method of making an electric lamp having an envelope with a pinch seal comprising the steps of pressing one or more shaped metal members against the external faces of the pinch seal of said lamp while the vitreous material of the seal is at a temperature such that it is plastically deformable, the said material thereby deforming to produce a mechanical interengagement of the material with the metal members.
Landscapes
- Fastening Of Light Sources Or Lamp Holders (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5181972A GB1447764A (en) | 1972-11-09 | 1972-11-09 | Pinch-sealed electric lamps |
Publications (1)
Publication Number | Publication Date |
---|---|
US3904909A true US3904909A (en) | 1975-09-09 |
Family
ID=10461495
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US411698A Expired - Lifetime US3904909A (en) | 1972-11-09 | 1973-11-01 | Pinch-sealed electric lamps |
Country Status (7)
Country | Link |
---|---|
US (1) | US3904909A (de) |
CA (1) | CA998421A (de) |
DE (1) | DE2355637C3 (de) |
FR (1) | FR2206580B1 (de) |
GB (1) | GB1447764A (de) |
IT (1) | IT999324B (de) |
NL (1) | NL7315157A (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3963916A (en) * | 1974-01-16 | 1976-06-15 | British Sealed Beams Limited | Bulbholder |
US4241391A (en) * | 1978-02-27 | 1980-12-23 | Westinghouse Electric Corp. | Inner lamp-mount assembly for sealed-beam headlamp and similar lighting apparatus |
US4363994A (en) * | 1980-07-07 | 1982-12-14 | Cortorillo Salvatore F | Halogen lamp with strap-type bulb support mechanism |
US4749901A (en) * | 1986-08-06 | 1988-06-07 | Cooper Industries | Elimination of exhaust tube relief in press-sealed lamp |
WO2007087796A1 (de) * | 2006-02-02 | 2007-08-09 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Leuchtelement |
EP2320447A3 (de) * | 2009-10-22 | 2011-08-24 | OSRAM SYLVANIA Inc. | PAR-Lampe |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2730689A (en) * | 1951-12-26 | 1956-01-10 | Gen Electric | Electric terminal connector |
US2864025A (en) * | 1953-08-24 | 1958-12-09 | Gen Electric | Infrared ray generating device |
US2999180A (en) * | 1955-09-07 | 1961-09-05 | British Thomson Houston Co Ltd | Electric lamps |
US3265923A (en) * | 1963-03-19 | 1966-08-09 | Westinghouse Electric Corp | Baseless double-ended electric incandescent lamp |
US3286088A (en) * | 1965-08-16 | 1966-11-15 | Joseph M Ahroni | Plug in light |
US3320466A (en) * | 1959-10-23 | 1967-05-16 | Gen Electric | Double-ended electric lamp and associated u-shaped metal clip |
US3360765A (en) * | 1966-05-27 | 1967-12-26 | British Lighting Ind Ltd | Mounting of tungsten-halogen lamps |
US3441778A (en) * | 1965-06-23 | 1969-04-29 | Lampes Elect Fab Reunies | Base for electric lamp |
US3469140A (en) * | 1967-02-13 | 1969-09-23 | Westinghouse Electric Corp | Single-ended electric incandescent lamp with improved base and terminal structure,and method of assembly |
US3602761A (en) * | 1969-06-30 | 1971-08-31 | Sylvania Electric Prod | Explosion proof quartz-halogen lamp |
-
1972
- 1972-11-09 GB GB5181972A patent/GB1447764A/en not_active Expired
-
1973
- 1973-10-31 CA CA184,686A patent/CA998421A/en not_active Expired
- 1973-11-01 US US411698A patent/US3904909A/en not_active Expired - Lifetime
- 1973-11-05 NL NL7315157A patent/NL7315157A/xx not_active Application Discontinuation
- 1973-11-07 DE DE2355637A patent/DE2355637C3/de not_active Expired
- 1973-11-09 FR FR7339900A patent/FR2206580B1/fr not_active Expired
- 1973-11-09 IT IT31132/73A patent/IT999324B/it active
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2730689A (en) * | 1951-12-26 | 1956-01-10 | Gen Electric | Electric terminal connector |
US2864025A (en) * | 1953-08-24 | 1958-12-09 | Gen Electric | Infrared ray generating device |
US2999180A (en) * | 1955-09-07 | 1961-09-05 | British Thomson Houston Co Ltd | Electric lamps |
US3320466A (en) * | 1959-10-23 | 1967-05-16 | Gen Electric | Double-ended electric lamp and associated u-shaped metal clip |
US3265923A (en) * | 1963-03-19 | 1966-08-09 | Westinghouse Electric Corp | Baseless double-ended electric incandescent lamp |
US3441778A (en) * | 1965-06-23 | 1969-04-29 | Lampes Elect Fab Reunies | Base for electric lamp |
US3286088A (en) * | 1965-08-16 | 1966-11-15 | Joseph M Ahroni | Plug in light |
US3360765A (en) * | 1966-05-27 | 1967-12-26 | British Lighting Ind Ltd | Mounting of tungsten-halogen lamps |
US3469140A (en) * | 1967-02-13 | 1969-09-23 | Westinghouse Electric Corp | Single-ended electric incandescent lamp with improved base and terminal structure,and method of assembly |
US3602761A (en) * | 1969-06-30 | 1971-08-31 | Sylvania Electric Prod | Explosion proof quartz-halogen lamp |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3963916A (en) * | 1974-01-16 | 1976-06-15 | British Sealed Beams Limited | Bulbholder |
US4241391A (en) * | 1978-02-27 | 1980-12-23 | Westinghouse Electric Corp. | Inner lamp-mount assembly for sealed-beam headlamp and similar lighting apparatus |
US4363994A (en) * | 1980-07-07 | 1982-12-14 | Cortorillo Salvatore F | Halogen lamp with strap-type bulb support mechanism |
US4749901A (en) * | 1986-08-06 | 1988-06-07 | Cooper Industries | Elimination of exhaust tube relief in press-sealed lamp |
WO2007087796A1 (de) * | 2006-02-02 | 2007-08-09 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Leuchtelement |
EP2320447A3 (de) * | 2009-10-22 | 2011-08-24 | OSRAM SYLVANIA Inc. | PAR-Lampe |
US8456088B2 (en) | 2009-10-22 | 2013-06-04 | Osram Sylvania Inc. | PAR lamp |
Also Published As
Publication number | Publication date |
---|---|
DE2355637C3 (de) | 1978-10-05 |
GB1447764A (en) | 1976-09-02 |
CA998421A (en) | 1976-10-12 |
FR2206580B1 (de) | 1976-11-19 |
DE2355637B2 (de) | 1978-02-16 |
FR2206580A1 (de) | 1974-06-07 |
DE2355637A1 (de) | 1974-05-16 |
IT999324B (it) | 1976-02-20 |
NL7315157A (de) | 1974-05-13 |
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