EP1323177A1 - Lampenhalterung mit einem halterungsrohr - Google Patents
Lampenhalterung mit einem halterungsrohrInfo
- Publication number
- EP1323177A1 EP1323177A1 EP01971252A EP01971252A EP1323177A1 EP 1323177 A1 EP1323177 A1 EP 1323177A1 EP 01971252 A EP01971252 A EP 01971252A EP 01971252 A EP01971252 A EP 01971252A EP 1323177 A1 EP1323177 A1 EP 1323177A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- wall portions
- lamp
- light emitting
- metal tube
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/34—Double-wall vessels or containers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
- H01J5/48—Means forming part of the tube or lamp for the purpose of supporting it
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
- H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
- H01J5/54—Means forming part of the tube or lamps for the purpose of providing electrical connection to it supported by a separate part, e.g. base
- H01J5/62—Connection of wires protruding from the vessel to connectors carried by the separate part
Definitions
- the present invention relates generally to lamps and, in particular, to a deep draw mount for securing a filament tube or arc tube in a lamp.
- Prior art mounts for halogen lamps use sheet metal straps and formed wire to attach light emitting tubes, such as filament tubes and arc tubes, to the base of a lamp.
- the prior art mounts are constructed from several pieces that hold a light emitting tube in place in the bulb.
- a sheet metal strap having two ends that are welded together is placed around an end portion of the light emitting tube. Once in place, the sheet metal strap is crimped around the end of the light emitting tube to secure the sheet metal strap to the tube.
- a wire post is welded to the sheet metal strap.
- One of the leads of the light emitting tube is welded to the wire post.
- a wire frame is secured to the wire post by welding.
- the wire frame is a single piece of wire that is bent at multiple locations to form a frame-like structure.
- the wire frame includes two legs that allow attachment of the light emitting tube to the base of the lamp.
- the wire frame positions the light emitting tube in the bulb of the lamp.
- a stiffener is welded to each of the legs of the wire frame to stiffen the legs of the wire frame and, thereby, reduce the amount of vibration transmitted to the light emitting tube.
- the second lead of the light emitting tube is welded to a fuse.
- the sheet metal strap of the wire frame mount engages all four sides of the end of the light emitting tube when it is crimped onto the tube.
- the sheet metal strap exerts undesirable stress and strain on the light emitting tube when it is crimped onto the tube. Stress and strain applied to the elongated sides of filament tubes and arc tubes is especially harmful, since a small amount of stress applied to the elongated sides of the end portion results in breakage of the tube.
- the sheet metal strap crimped to the end of the light emitting tube causes the end of the arc tube to become very hot during operation, due to the tight engagement of the elongated sides of the end of the tube by the sheet metal strap. Tight engagement of the end of the light emitting tube by the metal strap reduces the amount of airflow that comes in contact with the tube end, resulting in poor heat transfer away from the end of the light emitting tube in the area of the sheet metal strap. Increased temperature of the tube end reduces the life of the tube.
- Sheet metal strap and wire frame mounts are very costly to produce. Assembly of the metal strap and wire frame mount is extremely labor intensive.
- the pieces used to construct the sheet metal strap and wire frame mount are also expensive.
- the wire frame is expensive due to the multiple bends required to make the frame.
- the multiple bends of the wire frame results in wire frames being produced in a serial operation that increases the cost of the wire frames.
- the present invention concerns a lamp mount for mounting a light emitting tube to a lamp base.
- the lamp mount is constructed from a metal tube that is open at first and second ends.
- the first end includes first and second tube engagement wall portions that are spaced apart by interconnecting wall portions.
- the interconnecting wall portions are configured such that an application of pressure to the interconnecting wall portions causes the first and second tube engagement wall portions to move toward one another, bringing the first and second tube engagement wall portions into engagement with the light emitting tube.
- the interconnecting wall portions are configured such that an application of pressure to the interconnecting wall portion causes the first and second tube engagement wall portions to move apart, allowing insertion of the light emitting tube into the first end of the metal tube.
- removal of the pressure applied to the interconnecting wall portions causes the first and second tube engagement wall portions to move toward one another, bringing the first and second tube wall portions into engagement with the light emitting tube.
- a second end of the metal tube is adapted to connect the lamp mount to the base of the lamp.
- the second end includes a screw-in mounting portion.
- the screw-in mounting portion is defined by a helix that extends radially outward from the second end of the metal tube.
- the helix is sized to engage internal threads of a lamp base shell.
- the second end of the metal tube includes a crimp on mounting portion.
- the crimp on mounting portion extends radially outward from the second metal tube end and includes a circumferential lip that extends toward the first metal tube end.
- the second end of the metal tube is resiliently deformable, allowing tight engagement with an opening in a neck of the bulb.
- the mount of the present invention is used to construct a lamp.
- the lamp includes a hollow translucent body that terminates at a neck.
- a light emitting tube having first and second leads is disposed in the hollow translucent body.
- An elongated metal tube secures the light emitting tube in the metal tube's first open end.
- a second end of the metal tube is secured to the neck portion of the lamp.
- a lamp base shell is connected to the neck portion of the lamp.
- the lamp base shell includes a first conductive portion that is electrically connected to a first lead and a second electrically conductive portion that is connected to a second lead.
- the first lead may be electrically coupled to the elongated metal tube and the elongated metal tube may be electrically coupled to the first conductive portion of the lamp base shell.
- a light emitting tube is mounted to a lamp mounting tube by inserting the light emitting tube into the first end of the lamp mounting tube.
- Pressure is applied to the interconnecting wall portions of the lamp mounting tube to move the first and second tube engagement wall portions with respect to one another.
- the light emitting tube is engaged by the first and second tube engagement wall portions to connect the light emitting tube to the lamp mounting tube.
- the application of pressure to the interconnecting wall portions may cause the first and second tube engagement wall portions to move toward one another to bring the first and second tube wall portions into engagement with the end of the light emitting tube.
- the application of pressure to the interconnecting wall portions may cause the first and second tube engagement wall portions to move apart, allowing insertion of the light emitting tube into the first end of the lamp mounting tube.
- the pressure may then be removed from the interconnecting wall portions to allow the first and second tube engagement wall portions to move toward one another, bringing the first and second tube wall portions into engagement with the light emitting tube.
- a lamp mount produced in accordance with the present invention is much less costly to produce than metal strap and wire frame mounts of the prior art.
- the mount of the present invention may be a single drawn piece that is produced by a single operation.
- the lamp mount of the present invention eliminates undesirable stress and strain applied to the elongated sides of the end of the light emitting tube.
- the mount engages two shorter sides of the end of the light emitting tube.
- the mount allows air to flow past the end of the light emitting tube, resulting in good heat transfer away from the end of the light emitting tube.
- the good heat transfer characteristics between the light emitting tube and surrounding air that result from use of the mount of the present invention reduces the operating temperature of the end of the light emitting tube, increasing the life of the light emitting tube.
- Figure 1A is a perspective view of a crimp on type lamp mount
- Figure IB is a front elevational view of a crimp on lamp mount
- Figure 1C is a top plan view of a crimp on type lamp mount
- Figure ID is a cross-section of a tube engagement portion of a lamp mount of one embodiment
- Figure 2A is an exploded perspective view of a light emitting tube being mounted in a lamp with a crimp on type lamp mount;
- Figure 2B is a sectional view of a light emitting tube mounted in a lamp with the crimp on type lamp mount;
- Figure 3 A is a perspective view of a screw-in type lamp mount;
- Figure 3B is a front elevational view of a screw-in type lamp mount;
- Figure 3C is a top plan view of a screw-in type lamp mount
- Figure 4 is a sectional view of a light emitting tube secured in a lamp by a screw-in type lamp mount;
- Figure 5 A is a perspective view of a fluted lamp mount;
- Figure 5B is a front elevational view of a fluted lamp mount
- Figure 5C is top plan view of a fluted lamp mount
- Figure 6 is a sectional view of a light emitting tube secured to a lamp by a fluted lamp mount;
- Figure 7A is a perspective view of a tube engagement portion of a second embodiment;
- Figure 7B is a top plan view of a tube engagement portion of a second embodiment.
- the present invention is directed to a lamp mount 10 for mounting a light emitting tube 12 to a lamp base 14.
- the lamp mount includes a metal tube 16 made up of a plurality of wall portions 11 that is open at a light emitting tube engagement end 18 and a base securing end 20.
- the tube engagement end 18 includes first and second tube engagement wall portions 22a, 22b that are spaced apart by interconnecting wall portions 24.
- the interconnecting wall portions 24 are configured such that application of pressure to the interconnecting wall portions 24 causes the first and second tube engagement wall portions 22a, 22b to move with respect to one another.
- the application of pressure to the interconnecting wall portions 24 causes the first and second tube engagement wall portions 22a, 22b to move toward one another, bringing the first and second tube wall portions into engagement with the light emitting tube 12.
- the application of pressure to the interconnecting wall portions 24 causes the first and second tube engagement wall portions 22a, 22b to move apart, allowing insertion of the light emitting tube 12 into the lamp mounting tube.
- the base securing end 20 of the metal tube 16 is adapted to connect the lamp mount 10 and light emitting tube 12 to the base 14 of a lamp 26.
- one end of the metal tube 16 of the lamp mount 10 of one embodiment is comprised of a plurality of rounded convex wall portions 40 that are interconnected by a plurality of rounded concave wall portions 42 that together form a symmetrical metal tube 16.
- any pair 44 of diametrically opposed rounded convex portions 40 can serve as the tube engagement wall portions 22a, 22b, with the remaining wall portions serving as the interconnecting wall portions 24.
- Each pair 44 of diametrically opposed rounded convex segments 40 defines a cavity 46 having a width 48.
- the wall portions 11 of the lamp mount 10 are thin and are made from a resilient material, such as 0.004 to
- FIG. 7A and 7B An end portion of a metal tube 16' of a second embodiment is depicted in Figures 7A and 7B.
- tube engagement wall portions 22a, 22b of the metal tube 16' are diametrically opposed semi-circular wall portions that are spaced apart by pluralities of straight interconnecting wall portions 24'.
- the straight interconnecting wall portions 24' include two pairs of side wall portions 54 that are connected to the semi-circular wall portions 22a', 22b' to define a slot 56 between the two semi-circular wall portions.
- the side wall portions 54 are connected together by two crimping wall portions 60.
- the two crimping wall portions 60 connect the two pairs of opposing side wall portions 54 together.
- Ends 62 of the crimping wall portions 60 are connected together to complete the metal tube 16.
- the intersection of each pair of crimping wall portions 60 forms an edge 64a, 64b having a small radius.
- the radius of the edges 64a, 64b formed by the intersection of crimping wall portions 60 is approximately 0.010 inches.
- the width of the slot 56 defined between the semi-circular tube engagement portions 22a', 22b' is large enough to accommodate an end portion 66 ( Figure 2) of a light emitting tube 12.
- Application of pressure to the crimping segment 60 permanently deforms the crimping segments and moves the semi-circular tube engagement portions 22a',22b' towards one another.
- the semi-circular tube engagement wall portions 22a', 22b' engage the end of the light emitting tube.
- the metal tube 16 is elongated.
- a cross-section 68 ( Figure ID) 60 defined by tube engagement wall portions 11 is continuous from the tube engagement end 18 to the base securing end 20.
- the continuous perimeter 68 is slightly tapered from the base securing end 20 to the tube engagement end 18 to facilitate drawing of the metal tube 16 and insertion into the base 14 of the lamp.
- the tube engagement wall portions 22a, 22b and interconnecting wall portions 24 may extend the length 70 of the metal tube 16. If the type of mount shown in Figures 7A and 7B is used, it is not desirable for the tube engagement wall portions 22a', 22b' and interconnecting wall portions 24' to extend the entire length 70 of the tube in the exemplary embodiment. Instead, the tube engagement wall portions 22a', 22b' and interconnecting wall portions 24 extend from the tube engagement end 18 and transition into a round tubular portion (not shown). This arrangement is advantageous because drawing a substantial length of the end portion is difficult due to edges 64a, 64b defined by the crimping wall portions 60.
- one or more holes 74 may be included in the metal tube 16.
- the holes 74 in the tube 16 enhance airflow through the metal tube 16, enhancing heat transfer from the light emitting tube 12 to surrounding air.
- a threaded mount 27, a crimp mount 30 or a fluted mount 31 may be employed at the base securing end 20 to secure the metal tube 16 to the lamp.
- the crimp mount 30 includes a ferrule 31 defined by a circular end wall 76 that extends radially from the base securing end 20 of the metal tube 16, and a circumferential lip 32 that extends from the circumference of the circular end wall 76 toward the tube engagement end 18 of the mount 10.
- the circular end wall 76 of the ferrule 31 includes a plurality of holes 78 that increase airflow inside the lamp 26.
- Figures 2 A and 2B show an assembly of a lamp 26 in which a mount 10 having a crimp mount 30 at its base securing end 20 is used to secure the light emitting .tube 12.
- the light emitting tube 12 is a halogen arc tube or a filament tube.
- the end portion 66 of the light emitting tube 12 includes two narrow sides 80a, 80b and two elongated sides 82.
- the tube engagement wall portions 22a, 22b engage the narrow sides 80a, 80b of the end portion 66 of the light emitting tube 12 and do not substantially engage the elongated sides 82a, 82b of the end portion 66.
- the mount includes a tube engagement end as shown in Figures 7A and 7B, and a crimp type base securing end 20.
- the end portion 66 of the light emitting tube 12 is inserted into the slot 56 defined between the semi-circular tube engagement portions 22a', 22b'.
- Pressure is applied to the crimping wall portions 60 to permanently "squeeze” the crimping wall portions 60 together.
- the "squeezing" of the crimping wall portions 60 together moves the semicircular tube engagement wall portions 22a', 22b' toward one another and brings them into engagement with the narrow sides 80a, 80b of the end portion 66 of the light emitting tube 12.
- first and second wire leads 84a In either of the exemplary crimp type mounts, first and second wire leads 84a,
- the 84b of the light emitting tube 12 extend from the end portion 66 into the interior 86 of the metal tube 16.
- the first lead 84a is welded to the interior 86 of the metal tube 16.
- a fuse wire 90 is welded to the second lead 84b.
- the crimp mount 30 that is attached to and supports to the light emitting tube 12 is inserted into a hollow base shell 88.
- the fuse wire 90 is inserted through an eyelet 92 in a hollow base shell 88.
- a neck portion 102 of a bulb 38 includes an indentation for crimping a lamp base shell 88 and crimp mount 30 to the bulb 38.
- the bulb 38 is placed around the assembly of the light emitting tube 12 and crimp type lamp mount 30 and both the lamp base shell
- the crimping of the hollow base shell 88 and crimp mount 30 to the bulb makes the electrical connection between a second conductor 96 of the hollow base shell 88 and the lead 84a that is welded to the tube 16.
- the conductor 93 that forms the end of the of the base shell 88 and the second conductor 96 are spaced apart by an insulator 97.
- a threaded mount 27 is constructed by forming a helix portion 28 at the base securing end 20 of the lamp mount 10.
- the helix portion 28 is sized to fit within the hollow base shell 88 and has a pitch that corresponds to a pitch of threads 100 in the hollow base shell 88.
- the helix portion 28 can be formed in any shape.
- the helix portion 28 may be circular in shape, corresponding to the circular shape of the hollow base shell 88.
- the helix portion 28 is generally triangular in shape, reducing the amount of material that is needed to form the lamp mount 10.
- the ends 102a, 102b, 102c of the triangular-shaped helix portion 28 are cut-off.
- the ends 102a, 102b, 102c are rounded off to correspond with the circular shape of the hollow base shell 88.
- FIG 4 shows a lamp assembly 26 in which a metal tube 16 has a threaded mount 27 at its base securing end.
- the interconnecting wall portions 24 of the lamp mount 10 are compressed causing the tube engagement wall portions 22a, 22b to move apart.
- An end 66 of the light emitting tube 12 is inserted between the tube engagement wall portions 22a, 22b.
- the interconnecting wall portions 24 are released, allowing the tube engagement wall portions 22a, 22b to spring back against the end portion 66 of the light emitting tube 12.
- the tube engagement wall portions 22a, 22b engage the narrow sides 80a, 80b of the end portion 66 of the light emitting tube 12 and do not substantially engage the elongated sides 82a, 82b of the end portion 66.
- a threaded type mount includes a tube engagement end as shown in Figures 7A and 7B, and a threaded type base securing end 20.
- the end portion 66 of the light emitting tube 12 is inserted into the slot 56 defined between the semi-circular tube engagement wall portions 22a', 22b'.
- Pressure is applied to the crimping wall portions 60 to permanently "squeeze" the crimping wall portion 60 together.
- the "squeezing" of the crimping wall portions 60 together moves the semi-circular tube engagement wall portions 22a, 22b toward one another and brings them into engagement with the narrow sides 80a, 80b of the end portion 66 of the light emitting tube 12.
- the first and second leads 84a, 84b of the light emitting tube 12 extend from the end portion 66 into the interior 86 of the metal tube 16.
- the first lead 84a is welded to the interior 86 of the metal tube 16.
- a fuse wire is welded to the second lead 84b.
- the threaded mount 27 is threaded into a hollow base shell 88.
- the fuse wire 90 is inserted through an eyelet 92 in the hollow base shell 88.
- Tension is applied to the fuse wire 90 and the second lead 94b and the fuse wire is welded or soldered to a conductor 93 at the end 94 of the hollow base shell 88.
- the hollow base shell 88 is threaded or crimped onto a neck portion 108 of the bulb 38 to position the light emitting tube 12 and lamp mount 10 within the bulb 38.
- the lamp base shell 88 is crimped to an indentation in the neck of the bulb 38 to secure the lamp base shell 88 to the neck portion 102 and maintain the position of the lamp mount 10 and light emitting tube 12 within the bulb.
- the threaded connection between the helix portion 28 of the mount 10 and the internal threads 100 makes the electrical connection from the lead 84a to the second conductor 96 of the hollow base shell 88.
- a fluted mount 31 is formed by ending the metal tube 16 of the type shown in Figure 5 A at the base securing end.
- Figure 6 shows a lamp assembly 26 in which a metal tube 16 has a fluted mount 31 at its base securing end 20.
- a lamp mount 10 having a tube engagement end 18 shown in Figure 5 A When a lamp mount 10 having a tube engagement end 18 shown in Figure 5 A is used, the interconnecting wall portions 24 of the lamp mount 10 are compressed causing the tube engagement wall portions 22a, 22b to move apart. An end 66 of the light emitting tube 12 is inserted between the tube engagement wall portions 22a, 22b. Pressure is removed from the interconnecting wall portions 24, allowing the tube engagement wall portions 22a, 22b to spring back against the end portion 66 of the light emitting tube 12.
- the tube engagement wall portions 22a, 22b engage the narrow sides 80a, 80b of the end portion 66 of the light emitting tube 12 and do not substantially engage the elongated sides 82a, 82b of the end portion 66.
- an open area exists around the end portion 66 of the light emitting tube facilitating good heat transfer from the end 66 of the light emitting tube to surrounding air.
- the fluted type mount may include the tube engagement end of the embodiment shown in Figures 7A and 7B.
- the tube mounting end 18' shown in Figures 7A and 7B transitions into the fluted profile shown in Figure 10.
- the end portion 66 of the light emitting tube 12 is inserted into the slot 56 defined between the semi-circular tube engagement wall portions 22a,
- first and second leads 84a, 84b of the light emitting tube 12 extend into the interior 86 of the metal tube 16.
- a fuse wire is welded to the second lead 84b. The assembly of the light emitting tube, a fluted lamp mount is inserted into an opening 111 in the neck of the bulb.
- the fluted mount 31 is normally larger than the opening 111 in the neck of the bulb. Insertion of the fluted mount 31 resiliently deforms the fluted mount, to form an interference fit that holds the fluted mount 31 and light emitting tube 12 securely in the bulb.
- the fuse wire 90 is inserted through an eyelet 92 in the hollow base shell 88 and is welded or soldered to a conductor at the end 94 of the hollow base shell 88.
- the first lead 84a is welded to the second conductor 96 of the lamp base shell 88.
- the lamp base shell 88 is secured to the bulb 38.
- Lamp mounts constructed in accordance with the present invention are drawn.
- a die is constructed that generally conforms to the desired outer shape of the lamp mount 10.
- a properly sized piece of feed stock is disposed on the die.
- the properly sized feed stock is progressively punched into the die to form a part with the desired outer and inner shape.
- the final steps of punching conform the feed stock to the die and create the opening in the tube engagement end 18 of the metal tube 16.
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US68080400A | 2000-10-06 | 2000-10-06 | |
US680804 | 2000-10-06 | ||
PCT/US2001/029477 WO2002031851A1 (en) | 2000-10-06 | 2001-09-19 | Lamp mount with a lamp mounting tube |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1323177A1 true EP1323177A1 (de) | 2003-07-02 |
Family
ID=24732574
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01971252A Withdrawn EP1323177A1 (de) | 2000-10-06 | 2001-09-19 | Lampenhalterung mit einem halterungsrohr |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1323177A1 (de) |
WO (1) | WO2002031851A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10233073B3 (de) * | 2002-07-19 | 2004-02-12 | Sli Lichtsysteme Gmbh | Reflektorlampe |
DE102004024119B4 (de) | 2004-05-14 | 2006-04-20 | Siemens Ag | Düsenbaugruppe und Einspritzventil |
US8974095B2 (en) | 2009-09-23 | 2015-03-10 | Osram Ag | Coupling component for lighting devices |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3249781A (en) * | 1962-04-30 | 1966-05-03 | Gen Electric | Single-ended jacketed arc lamp mounting |
DE4000123A1 (de) * | 1990-01-04 | 1991-07-11 | Paul Albrecht | Fassung fuer eine kleingluehlampe |
US5212422A (en) * | 1991-12-30 | 1993-05-18 | Gte Products Corporation | Lamp capsule support base |
DE19624860A1 (de) * | 1996-04-04 | 1997-10-09 | Peter Grimm | Elektronische Entladungslampe |
US6008566A (en) * | 1997-05-09 | 1999-12-28 | Osram Sylvania Inc. | Lamp mounting assembly with banding straps |
-
2001
- 2001-09-19 EP EP01971252A patent/EP1323177A1/de not_active Withdrawn
- 2001-09-19 WO PCT/US2001/029477 patent/WO2002031851A1/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO0231851A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2002031851A1 (en) | 2002-04-18 |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20030507 |