US3541492A - Heat sinks for electric lamps - Google Patents

Heat sinks for electric lamps Download PDF

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Publication number
US3541492A
US3541492A US750328A US3541492DA US3541492A US 3541492 A US3541492 A US 3541492A US 750328 A US750328 A US 750328A US 3541492D A US3541492D A US 3541492DA US 3541492 A US3541492 A US 3541492A
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Prior art keywords
lamp
heat
holder
end cap
arms
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Expired - Lifetime
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US750328A
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John James Fenn
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Benjamin Electric Ltd
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Benjamin Electric Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
    • H01R33/02—Single-pole devices, e.g. holder for supporting one end of a tubular incandescent or neon lamp
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes

Definitions

  • the lamp holder has a socket for the lamp end cap and two pivoted arms mounted on the body of the holder, the arms being springbiased to engage the lamp and act as heat sinks.
  • the positions of the arms relative to the holder body are axially adjustable to allow for tolerance variations in the lamp dimensions. A shorter or longer lamp can be conveniently accommodated by shifting the holder as a whole.
  • the heat sink arms will always engage the lamp near one end, which is where it is required to cool the lamp.
  • the present invention relates to electric lamp holders for tubular electric lamps.
  • an electric lamp holder for a tubular electric lamp comprising a support for one end of the lamp and at least one heatconductor member movably mounted on the support and resiliently biased to engage the lamp at or near said one end thereof and dissipate heat away therefrom.
  • FIG. 1 is a perspective view of an electric lamp holder embodying the invention, showing one side and the end of the holder from which a lamp projects;
  • FIG. 2 is an end elevation of the holder, showing the end from which the lamp projects, but omitting the lamp;
  • FIG. 3 is a side elevational section of the holder of FIGS. 1 and 2, and
  • FIG. 4 is an end elevation opposite to that of FIG. 2.
  • a pair of lamp holders each like the illustrated electric lamp holder are designed to hold the respective end caps 13 of a tubular linear tungsten halogen lamp 11.
  • the lamp holder 10 comprises a cast non-metallic support 12 having a base portion 12a, a pedestal portion 12b, and a housing portion 12c.
  • a metal contact 14 is mounted in a porcelain contact carrier 16 that is slidably mounted within the support 120 and is biased by a helical compression spring 18 towards the front end 20 of lamp holder 10 to engage an end contact (not shown) in end cap 13 of the lamp 11.
  • the rear end of spring 18 is retained within the support 12 by means of a back plate 22 which is secured to support 12 by means of two screws 24.
  • the contact 14 is crimped to an electric cable 25 which extends out from the back of the support 12, as shown in FIG. 2.
  • a heat sink for the lamp which serves to dissipate excess heat from the end of the lamp, is provided by two heat-conductor metal members 26 and 28, which are respectively pivotally mounted on two pivot pins 30 and 32.
  • the pins 30 and 32 are each in the form of a headed pin each with an extended projecting shank 31, 33, respectively, the shanks 31 and 33 projecting in front of the support 12 by a sufficient amount to allow the heat-conductor members 26 and 28, as well as pivoting on the shanks 31 and 33, to slide along them, so that the positions of the members 26 and 28 can be adjusted axially relative to the lamp axis (coincident with the axis of spring 18). This enables the members 26 and 28 to take up different axial positions to accommodate various lamp dimensions and/ or tolerances.
  • a helical compression spring 34 is connected between members 26 and 28 on inwardly projecting pins 35 and 37 beneath the pivot pins 30 and 32, to bias inwardly projecting end portions 36 and 38 of members 26 and 28 into engagement with flats (not shown) which are provided on the tubular lamp adjacent each end.
  • the surfaces of the ends 36 and 38 of members 26 and 28 are convexly curved, as shown in FIG. 2, so that a sufiiciently good thermal contact is made with the flats on the lamp even in the event the flats are misaligned.
  • the members 26 and 28 are of solid metal, so as to form good heatconductors to conduct heat away from the lamp.
  • cam member 40 is rotatably mounted in support 12 and a flat portion 41 of cam member 40 extends between members 26 and 28.
  • Cam member 40 is fitted with a release handle 42, secured by means of a retaining spring clip 44, whereby cam member 40 can be rotated to cam members 26 and 28 away from their respective lamp-engaging positions to permit insertion into *and/or withdrawal from the holder 10 of the end of the lamp 11.
  • the holder 10 can be used for different tubular tungsten halogen lamps of various lengths, a second similar holder being used for the other end of the lamp. Being mounted on the support 12, the heat-conductor members 26 and 28 should always be in the correct positions to act as heat sinks for the lamp end, to assist dissipation of excessive heat to the surrounding atmosphere, and maintain the lamp at an efiicient operating temperature.
  • the rear end of support 12 acts as a stop for lever 42, so that when the cam member 40 is rotated to cause the fiat portion 41 to open the members 26 and 28 it will move to just over dead centre position where it will be retained by the spring bias of members 26 and 28.
  • Lamp holder means for supporting a tubular electric lamp having at one end end cap means containing an electrical contact comprising a stationary support (12) having a housing portion adapted to receive the end cap means, and a pedestal portion for supporting said housing portion;
  • means for energizing said lamp including a contact (14) carried by said housing portion for engaging the lamp end contact;
  • heat sink means for dissipating heat from said end cap means during energization of said lamp, comprising a pair of heat-conductive arms (26, 28) each pivotally connected with said pedestal portion for' pivotal movement about an axis parallel with the lamp axis, and spring means (34) biasing said arms together into engagement with and on opposite sides of said end cap means; and
  • cam means (40) movably connected with said support for releasing said heat-conductive arms from said end cap means, said cam means extending between said arms and initially having a retracted position in which said arms are in heat conductive engagement with said lamp end cap, said cam means being operable toward a released position for pivoting said arms out of engagement with said end cap.
  • Lamp holder means for supporting a tubular electric lamp having at one end end cap means containing an electrical contact comprising a stationary support (12) having a housing portion adapted to receive the end cap means, and a pedestal portion for supporting said housing portion;
  • means for energizing said lamp including a contact (14) carried by said housing portion for engaging the lamp end contact;
  • heat sink means for dissipating heat from said end cap means during energization of the lamp, comprising a pair of heat-conductive arms (26, 28) each pivotally connected intermediate its ends with said pedestal portion for pivotal movement about an axis parallel with the lamp axis, said arms being adapted for heat-conductive engagement at one end with opposite sides of said end cap means; and
  • compression spring means cooperating with the other ends of said arms for biasing said armstogether into engagement with said end cap means.
  • Lamp holder means as defined in claim 2, wherein said means for energizing saidlamp comprises carrier means (16) for said contact, said carrier means being slidably connected with the housing portion of said support for sliding movement axially of the lamp to accommodate lamps of different lengths, and spring means bias 4 ing said contact carrier means axially toward the lamp end cap;
  • each of said heat-conductive arms is mounted for axial sliding movement relative to its pivot axis.

Description

Nam 17, 1970 J. J. FENN HEAT SINKS FOR ELECTRIC LAMPS 2 Sheets-Sheet 1 Filed Aug. 5, 1968 INVENTOR 7 ATTORNEY Nov. 17, 1970 J. JQFENN 3,541,492
HEAT s mxs FOR ELECTRIC LAMPS Filed Aug. '5. 1968 2 Sheets-Sheet w 44 32 30 Hww 56.4. mm zw- QM INYINTOR AT'TORNEY United States Patent 3,541,492 HEAT SINKS FOR ELECTRIC LAMPS John James Fenn, Tottenham, England, assignor to The Benjamin Electric Limited Filed Aug. 5, 1968, Ser. No. 750,328 Int. Cl. H0lr 13/14 US. Cl. 33952 4 Claims ABSTRACT OF THE DISCLOSURE A lamp holder for a tubular electric lamp of the type having a cap at one end or at each end. The lamp holder has a socket for the lamp end cap and two pivoted arms mounted on the body of the holder, the arms being springbiased to engage the lamp and act as heat sinks. The positions of the arms relative to the holder body are axially adjustable to allow for tolerance variations in the lamp dimensions. A shorter or longer lamp can be conveniently accommodated by shifting the holder as a whole. The heat sink arms will always engage the lamp near one end, which is where it is required to cool the lamp.
The present invention relates to electric lamp holders for tubular electric lamps.
It is an object of the invention to provide a unitary tubular electric lamp holder of simple construction which can be used with a lamp of any length, and provide a heat sink to cool the end of the lamp which will correctly engage the lamp end regardless of tolerance variations in the lamp.
According to the invention, there is provided an electric lamp holder for a tubular electric lamp comprising a support for one end of the lamp and at least one heatconductor member movably mounted on the support and resiliently biased to engage the lamp at or near said one end thereof and dissipate heat away therefrom.
The invention will be described by way of example with reference to the accompanying drawings, wherein:
FIG. 1 is a perspective view of an electric lamp holder embodying the invention, showing one side and the end of the holder from which a lamp projects;
FIG. 2 is an end elevation of the holder, showing the end from which the lamp projects, but omitting the lamp;
FIG. 3 is a side elevational section of the holder of FIGS. 1 and 2, and
FIG. 4 is an end elevation opposite to that of FIG. 2.
A pair of lamp holders each like the illustrated electric lamp holder are designed to hold the respective end caps 13 of a tubular linear tungsten halogen lamp 11.
The lamp holder 10 comprises a cast non-metallic support 12 having a base portion 12a, a pedestal portion 12b, and a housing portion 12c. A metal contact 14 is mounted in a porcelain contact carrier 16 that is slidably mounted within the support 120 and is biased by a helical compression spring 18 towards the front end 20 of lamp holder 10 to engage an end contact (not shown) in end cap 13 of the lamp 11. The rear end of spring 18 is retained within the support 12 by means of a back plate 22 which is secured to support 12 by means of two screws 24. The contact 14 is crimped to an electric cable 25 which extends out from the back of the support 12, as shown in FIG. 2.
A heat sink for the lamp, which serves to dissipate excess heat from the end of the lamp, is provided by two heat- conductor metal members 26 and 28, which are respectively pivotally mounted on two pivot pins 30 and 32. The pins 30 and 32 are each in the form of a headed pin each with an extended projecting shank 31, 33, respectively, the shanks 31 and 33 projecting in front of the support 12 by a sufficient amount to allow the heat- conductor members 26 and 28, as well as pivoting on the shanks 31 and 33, to slide along them, so that the positions of the members 26 and 28 can be adjusted axially relative to the lamp axis (coincident with the axis of spring 18). This enables the members 26 and 28 to take up different axial positions to accommodate various lamp dimensions and/ or tolerances.
A helical compression spring 34 is connected between members 26 and 28 on inwardly projecting pins 35 and 37 beneath the pivot pins 30 and 32, to bias inwardly projecting end portions 36 and 38 of members 26 and 28 into engagement with flats (not shown) which are provided on the tubular lamp adjacent each end. The surfaces of the ends 36 and 38 of members 26 and 28 are convexly curved, as shown in FIG. 2, so that a sufiiciently good thermal contact is made with the flats on the lamp even in the event the flats are misaligned. The members 26 and 28 are of solid metal, so as to form good heatconductors to conduct heat away from the lamp.
To permit the insertion and/or withdrawal of lamp 11, a cam member 40 is rotatably mounted in support 12 and a flat portion 41 of cam member 40 extends between members 26 and 28. Cam member 40 is fitted with a release handle 42, secured by means of a retaining spring clip 44, whereby cam member 40 can be rotated to cam members 26 and 28 away from their respective lamp-engaging positions to permit insertion into *and/or withdrawal from the holder 10 of the end of the lamp 11.
The holder 10 can be used for different tubular tungsten halogen lamps of various lengths, a second similar holder being used for the other end of the lamp. Being mounted on the support 12, the heat- conductor members 26 and 28 should always be in the correct positions to act as heat sinks for the lamp end, to assist dissipation of excessive heat to the surrounding atmosphere, and maintain the lamp at an efiicient operating temperature.
The rear end of support 12 acts as a stop for lever 42, so that when the cam member 40 is rotated to cause the fiat portion 41 to open the members 26 and 28 it will move to just over dead centre position where it will be retained by the spring bias of members 26 and 28.
Finally, it should be mentioned that by incorporating the heat- conductor members 26 and 28 in the holder 10 it is only necessary to provide alternative mounting positions in a single lighting fitting for two holders such as holder 10 to accommodate different sizes of lamps in the same lighting fitting.
What is claimed is:
1. Lamp holder means for supporting a tubular electric lamp having at one end end cap means containing an electrical contact, comprising a stationary support (12) having a housing portion adapted to receive the end cap means, and a pedestal portion for supporting said housing portion;
means for energizing said lamp including a contact (14) carried by said housing portion for engaging the lamp end contact;
heat sink means for dissipating heat from said end cap means during energization of said lamp, comprising a pair of heat-conductive arms (26, 28) each pivotally connected with said pedestal portion for' pivotal movement about an axis parallel with the lamp axis, and spring means (34) biasing said arms together into engagement with and on opposite sides of said end cap means; and
cam means (40) movably connected with said support for releasing said heat-conductive arms from said end cap means, said cam means extending between said arms and initially having a retracted position in which said arms are in heat conductive engagement with said lamp end cap, said cam means being operable toward a released position for pivoting said arms out of engagement with said end cap.
2. Lamp holder means for supporting a tubular electric lamp having at one end end cap means containing an electrical contact, comprising a stationary support (12) having a housing portion adapted to receive the end cap means, and a pedestal portion for supporting said housing portion;
means for energizing said lamp including a contact (14) carried by said housing portion for engaging the lamp end contact;
heat sink means for dissipating heat from said end cap means during energization of the lamp, comprising a pair of heat-conductive arms (26, 28) each pivotally connected intermediate its ends with said pedestal portion for pivotal movement about an axis parallel with the lamp axis, said arms being adapted for heat-conductive engagement at one end with opposite sides of said end cap means; and
compression spring means cooperating with the other ends of said arms for biasing said armstogether into engagement with said end cap means.
3. Lamp holder means as defined in claim 2, wherein said means for energizing saidlamp comprises carrier means (16) for said contact, said carrier means being slidably connected with the housing portion of said support for sliding movement axially of the lamp to accommodate lamps of different lengths, and spring means bias 4 ing said contact carrier means axially toward the lamp end cap;
and further wherein each of said heat-conductive arms is mounted for axial sliding movement relative to its pivot axis.
4. Lamp holder means as defined in claim 2, wherein the end cap means of the tubular lamp includes flat portions;
and further wherein the ends of said heat-conducting arms adjacent said end cap means are convexly curved to afford sufficient thermal contact with the end cap fiat portions even in the event the flats are misaligned.
References Cited UNITED STATES PATENTS 3,390,372 6/1968 Kember et a1. 339-112 FOREIGN PATENTS 1,416,565 9/1965 7 France.
1,032,396 6/1958 Germany.
MARVIN A. CHAMPION, Primary Examiner J. H. McGLYNN, Assistant Examiner US. Cl. X.R.
US750328A 1968-08-05 1968-08-05 Heat sinks for electric lamps Expired - Lifetime US3541492A (en)

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3832540A (en) * 1973-04-13 1974-08-27 Keene Corp Lamp mounting for high intensity light fixture
US3906217A (en) * 1974-03-14 1975-09-16 Ppg Industries Inc Lamp mounting bracket
US4168522A (en) * 1976-07-12 1979-09-18 Oce-Van Der Grinten N.V. Light emission control for gas-discharge lamp
US4411516A (en) * 1981-04-24 1983-10-25 Canon Kabushiki Kaisha Original illumination apparatus
US4536832A (en) * 1982-07-01 1985-08-20 Altman Stage Lighting Co., Inc. Replaceable light source assembly
US4703404A (en) * 1981-02-17 1987-10-27 George N. Panagiotou Portable lighting device
US4800475A (en) * 1987-10-27 1989-01-24 Cool Lux Lighting Industries, Inc. Portable electric light
US4961127A (en) * 1989-05-09 1990-10-02 Sylvan R. Shemitz Associates, Inc. Lamp socket mounting bracket
US5219221A (en) * 1990-01-29 1993-06-15 Asahi Kogaku Kogyo Kabushiki Kaisha Lamp retainer of light source device for endoscope
US5968397A (en) * 1997-06-06 1999-10-19 Amana Company, L.P. Apparatus for cooling a quartz halogen lamp with heat conducting convector secured to the lamp terminal or socket
US6008568A (en) * 1998-03-13 1999-12-28 Dymax Corporation Heatsinked lamp assembly
US20030165058A1 (en) * 2002-02-15 2003-09-04 Thomas & Betts International, Inc. Hazardous location induction lighting fixture
US20080009170A1 (en) * 2006-07-07 2008-01-10 Japan Aviation Electronics Industry, Limited Connecting member and connector each having a slider adapted to displace contact portions
US20080084700A1 (en) * 2006-09-18 2008-04-10 Led Lighting Fixtures, Inc. Lighting devices, lighting assemblies, fixtures and method of using same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1032396B (en) * 1956-10-11 1958-06-19 Busch Jaeger Duerener Metall Socket for fluorescent lamps with a rotating roller that guides the lamp contact pins
FR1416565A (en) * 1963-08-29 1965-11-05 Pirelli Advanced training in the fixing of electrical devices
US3390372A (en) * 1963-07-11 1968-06-25 Thorn Electrical Ind Ltd Lamp fittings for tungsteniodine lamps

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1032396B (en) * 1956-10-11 1958-06-19 Busch Jaeger Duerener Metall Socket for fluorescent lamps with a rotating roller that guides the lamp contact pins
US3390372A (en) * 1963-07-11 1968-06-25 Thorn Electrical Ind Ltd Lamp fittings for tungsteniodine lamps
FR1416565A (en) * 1963-08-29 1965-11-05 Pirelli Advanced training in the fixing of electrical devices

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3832540A (en) * 1973-04-13 1974-08-27 Keene Corp Lamp mounting for high intensity light fixture
US3906217A (en) * 1974-03-14 1975-09-16 Ppg Industries Inc Lamp mounting bracket
DE2510214A1 (en) * 1974-03-14 1975-09-25 Ppg Industries Inc LAMP HOLDER
US4168522A (en) * 1976-07-12 1979-09-18 Oce-Van Der Grinten N.V. Light emission control for gas-discharge lamp
US4703404A (en) * 1981-02-17 1987-10-27 George N. Panagiotou Portable lighting device
US4411516A (en) * 1981-04-24 1983-10-25 Canon Kabushiki Kaisha Original illumination apparatus
US4536832A (en) * 1982-07-01 1985-08-20 Altman Stage Lighting Co., Inc. Replaceable light source assembly
US4800475A (en) * 1987-10-27 1989-01-24 Cool Lux Lighting Industries, Inc. Portable electric light
US4961127A (en) * 1989-05-09 1990-10-02 Sylvan R. Shemitz Associates, Inc. Lamp socket mounting bracket
US5219221A (en) * 1990-01-29 1993-06-15 Asahi Kogaku Kogyo Kabushiki Kaisha Lamp retainer of light source device for endoscope
US5968397A (en) * 1997-06-06 1999-10-19 Amana Company, L.P. Apparatus for cooling a quartz halogen lamp with heat conducting convector secured to the lamp terminal or socket
US6008568A (en) * 1998-03-13 1999-12-28 Dymax Corporation Heatsinked lamp assembly
US20030165058A1 (en) * 2002-02-15 2003-09-04 Thomas & Betts International, Inc. Hazardous location induction lighting fixture
US20080009170A1 (en) * 2006-07-07 2008-01-10 Japan Aviation Electronics Industry, Limited Connecting member and connector each having a slider adapted to displace contact portions
US7503786B2 (en) * 2006-07-07 2009-03-17 Japan Aviation Electronics Industry, Limited Connecting member and connector each having a slider adapted to displace contact portions
CN101677169B (en) * 2006-07-07 2012-06-20 日本航空电子工业株式会社 Connecting member and connector each having a slider adapted to displace contact portions
US20080084700A1 (en) * 2006-09-18 2008-04-10 Led Lighting Fixtures, Inc. Lighting devices, lighting assemblies, fixtures and method of using same
US7959329B2 (en) * 2006-09-18 2011-06-14 Cree, Inc. Lighting devices, lighting assemblies, fixtures and method of using same

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