US3706902A - Electric lamp with resilient base - Google Patents

Electric lamp with resilient base Download PDF

Info

Publication number
US3706902A
US3706902A US42334A US3706902DA US3706902A US 3706902 A US3706902 A US 3706902A US 42334 A US42334 A US 42334A US 3706902D A US3706902D A US 3706902DA US 3706902 A US3706902 A US 3706902A
Authority
US
United States
Prior art keywords
base
lamp
cement
envelope
resilient
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
Application number
US42334A
Inventor
Robert Wilbur Cookson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GTE Sylvania Inc
Original Assignee
Sylvania Electric Products Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sylvania Electric Products Inc filed Critical Sylvania Electric Products Inc
Application granted granted Critical
Publication of US3706902A publication Critical patent/US3706902A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

Definitions

  • the present invention reduces the above disadvantages because it permits the use of a single type of lamp which will resist both vibration and shock when such vibration and shock are transmitted via the base. Moreover, the direct cost of the lamp is reduced because a standard lamp construction such as used in incandescent lamps for more general use can be used. In addition, my invention permits a higher base operating temperature to be tolerated for a longer period of time than is now possible with standard cements.
  • the resilient cement may be, for example, a di-methyl silicone rubber.
  • the sealed glass envelope 1 contains the glass stem 2 through which lead-in wires 3, 4, extend to support the filament 5.
  • a coiled coil filament is one in which a wire is coiled once to a small diameter, then this coil is itself coiled at a larger diameter.
  • This canbe a Class C lamp, which generally has its envelope filled with inert gas, such as the rare gases or nitrogen, at a pressure generally slightly below atmospheric although a higher pressure is often used; or it can be a Class B lamp, which has an envelope from whose interior all or nearly all of the gases have been removed, producing a nearly perfect vacuum inside.
  • the usual sealed exhaust tube 10 extends from the lamp.
  • the base is of the customary screw type, having a cylindrical metal shell 7 with screw threads 8 thereon, and a glass insulating plug sealed to the bottom of the shell and supporting an eyelet contact 9.
  • One lead wire 3, is connected to the top of the shell 7, and the other 4 to the egelet contact 9.
  • the ase 6 IS held to envelope 1 by the resilient cement 11 between the base 6 and the lamp envelope 1, the cement being about three thirty-seconds inch thick, and the cement must extend out of theshell to support the envelope 1 out of direct mechanical contact with shell 7.
  • the resilient cement can be a di-methyl silicone rubber, such as the Dow-Corning Co.s materials -047, CF-l7l and 8-2288.
  • An electric lamp comprising an envelope enclosing a light-emitting element, a contact base for said envelope, and a layer of a resilient cement between said envelope and said base and holding the two together, said cement extending out of said base to support said envelope out of direct mechanical contact with said base.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

An electric lamp having a light-transmitting envelope, such as a bulb, attached to a contact base by a resilient cement such as a di-methyl silicone rubber, and spaced from the base by said cement, to resist the transmission of vibration and shock from the base to the bulb.

Description

United States Patent Cookson [451 Dec. 19,1972
[541 ELECTRIC LAMP WITH RESILIENT BASE [72] Inventor: Robert Wilbur Cookson, Reading,
Mass.
[73] Assignee: Sylvania Electric Products [22] Filed: June 1, 1970 [21] Appl. No.: 42,334
[52] US. Cl. ..3l3/318, 313/269, 339/145 [51] Int. Cl ..I-I0lj 1/18 [58] Field of Search ..313/269, 318; 339/145, 146
[56] References Cited UNITED STATES PATENTS 2,383,925 8/1945 West ..313/318 X 2,406,271 8/1946 Van Horn 2,398,595 4/1946 Powell et al. ..313/3l8 X 2,354,642 8/1944 Anderson ..313/318 X FOREIGN PATENTS OR APPLICATIONS 1,168,854 3/1957 France "313/318 1,099,791 3/1955 France "313/317 Primary Examiner-David Schonberg Assistant Examiner-Paul R. Miller Attorney-Norman J. OMalley, Laurence Burns and Joseph C. Ryan [5 7 ABSTRACT An electric lamp having a light-transmitting envelope, such as a bulb, attached to a contact base by a resilient cement such as a di-methyl silicone rubber, and spaced from the base by said cement, to resist the transmission of vibration and shock from the base to the bulb.
4 Claims, 1 Drawing Figure PATENTED DEC 19 I972 ROBERT W. COOKSON INVENTOR BYW m ATTORNEY ELECTRIC LAMP WITII RESILIENT BASE FIELD OF INVENTION This invention relates to electric lamps of the type having an enclosing envelope and a base to which the envelope is attached by adhesive. In particular it relates to lamps of this type which will resist shock pulses and vibration.
BRIEF SUMMARY OF PRIOR ART At present there are commercial lamps designed to be vibration resistant and others designed to be shockproof. A special mount design is used in each case, and the designs are not only widely different from each other but also different from the mount used in standard incandescent lamps of equivalent size. The socalled C-9 mount is ordinarily used for resistance to vibration and the C-22 for resistance to shock. In certain applications special filament materials are required which are substantially more expensive than the standard tungsten; for example, thoriated tungsten and rhenium tungsten. The necessity of stocking several types of lamps increases the amount of bookkeeping, handling and storage necessary.
BRIEF SUMMARY OF INVENTION The present invention reduces the above disadvantages because it permits the use of a single type of lamp which will resist both vibration and shock when such vibration and shock are transmitted via the base. Moreover, the direct cost of the lamp is reduced because a standard lamp construction such as used in incandescent lamps for more general use can be used. In addition, my invention permits a higher base operating temperature to be tolerated for a longer period of time than is now possible with standard cements.
This is attained by using a resilient or flexible cement to hold the base to the lamp envelope and by using it in sufficient thickness to damp any vibration or shock which might otherwise be transmitted from the base-to the filament inside the bulb. The resilient cement may be, for example, a di-methyl silicone rubber.
Other features, objects and advantages of the invention will be apparent, taken with the drawing, which shows a cross-section view of a lamp according to the invention.
In the drawing the sealed glass envelope 1 contains the glass stem 2 through which lead-in wires 3, 4, extend to support the filament 5. A coiled coil filament is one in which a wire is coiled once to a small diameter, then this coil is itself coiled at a larger diameter. This canbe a Class C lamp, which generally has its envelope filled with inert gas, such as the rare gases or nitrogen, at a pressure generally slightly below atmospheric although a higher pressure is often used; or it can be a Class B lamp, which has an envelope from whose interior all or nearly all of the gases have been removed, producing a nearly perfect vacuum inside. The usual sealed exhaust tube 10 extends from the lamp.
The base is of the customary screw type, having a cylindrical metal shell 7 with screw threads 8 thereon, and a glass insulating plug sealed to the bottom of the shell and supporting an eyelet contact 9. One lead wire 3, is connected to the top of the shell 7, and the other 4 to the egelet contact 9.
The ase 6 IS held to envelope 1 by the resilient cement 11 between the base 6 and the lamp envelope 1, the cement being about three thirty-seconds inch thick, and the cement must extend out of theshell to support the envelope 1 out of direct mechanical contact with shell 7.
The resilient cement can be a di-methyl silicone rubber, such as the Dow-Corning Co.s materials -047, CF-l7l and 8-2288.
Tests on a group of lamps show that lamps with the resilient base of my invention have as long a life under vibration as lamps with the previous standard base have without any vibration. The transmission of shock through the base is found to be considerably dampened by the resilient cement.
Although a particular embodiment of the invention has been described, various modifications and alterations of the invention will be apparent to a worker skilled in the art, without departing from the spirit and scope of the invention, which is set forth in the claims.
What I claim is:
1. An electric lamp comprising an envelope enclosing a light-emitting element, a contact base for said envelope, and a layer of a resilient cement between said envelope and said base and holding the two together, said cement extending out of said base to support said envelope out of direct mechanical contact with said base.
2. The lamp of claim 1, in which the resilient cement is present in sufficient thickness to substantially reduce the transmission of shock and vibration from the base to the envelope.
3. The lamp of claim 1, in which the resilient cement is a di-methyl silicone rubber.
4. The lamp of claim 2, in which the resilient cement is a di-methyl silicone rubber.

Claims (3)

  1. 2. The lamp of claim 1, in which the resilient cement is present in sufficient thickness to substantially reduce the transmission of shock and vibration from the base to the envelope.
  2. 3. The lamp of claim 1, in which the resilient cement is a di-methyl silicone rubber.
  3. 4. The lamp of claim 2, in which the resilient cement is a di-methyl silicone rubber.
US42334A 1970-06-01 1970-06-01 Electric lamp with resilient base Expired - Lifetime US3706902A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4233470A 1970-06-01 1970-06-01

Publications (1)

Publication Number Publication Date
US3706902A true US3706902A (en) 1972-12-19

Family

ID=21921308

Family Applications (1)

Application Number Title Priority Date Filing Date
US42334A Expired - Lifetime US3706902A (en) 1970-06-01 1970-06-01 Electric lamp with resilient base

Country Status (2)

Country Link
US (1) US3706902A (en)
GB (1) GB1293493A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946263A (en) * 1974-12-23 1976-03-23 Protzeller Harry W Encapsulated lamp assembly
US5751105A (en) * 1995-12-15 1998-05-12 General Electric Company Assembly arrangement for a compact fluorescent lamp
US5765941A (en) * 1993-07-16 1998-06-16 Central Tools, Inc. Fluorescent lamp and method of manufacturing same
US5772310A (en) * 1995-07-05 1998-06-30 General Electric Company Discharge lamp cap and method for fixing the discharge tube
US7234973B1 (en) 2006-03-23 2007-06-26 Shelly Mark E Lighting system having modified light bulb base and luminare socket for preventing the selection of an over wattage light bulb and method of forming same
US20090230864A1 (en) * 2006-05-08 2009-09-17 Koninklijke Philips Electronics N.V. Compact hid arc lamp having shrouded arc tube and helical lead wire

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2806071C3 (en) * 1978-02-14 1980-08-14 Dr. Johannes Heidenhain Gmbh, 8225 Traunreut Photoelectric length or angle measuring device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2354642A (en) * 1943-07-01 1944-08-01 Westinghouse Electric & Mfg Co Shockproof base
US2383925A (en) * 1944-11-01 1945-08-28 Bell Telephone Labor Inc Electron discharge device
US2398595A (en) * 1944-11-20 1946-04-16 Westinghouse Electric Corp Rough service electrical device
US2406271A (en) * 1942-01-30 1946-08-20 Gen Electric Base for electric lamps or similar devices
FR1099791A (en) * 1953-05-02 1955-09-09 Philips Nv Incandescent lamp or discharge tube
FR1168854A (en) * 1956-03-09 1958-12-18 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Electric lamp with aligned base

Patent Citations (6)

* Cited by examiner, † Cited by third party
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
US2354642A (en) * 1943-07-01 1944-08-01 Westinghouse Electric & Mfg Co Shockproof base
US2383925A (en) * 1944-11-01 1945-08-28 Bell Telephone Labor Inc Electron discharge device
US2398595A (en) * 1944-11-20 1946-04-16 Westinghouse Electric Corp Rough service electrical device
FR1099791A (en) * 1953-05-02 1955-09-09 Philips Nv Incandescent lamp or discharge tube
FR1168854A (en) * 1956-03-09 1958-12-18 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Electric lamp with aligned base

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946263A (en) * 1974-12-23 1976-03-23 Protzeller Harry W Encapsulated lamp assembly
US5765941A (en) * 1993-07-16 1998-06-16 Central Tools, Inc. Fluorescent lamp and method of manufacturing same
US5772310A (en) * 1995-07-05 1998-06-30 General Electric Company Discharge lamp cap and method for fixing the discharge tube
US5751105A (en) * 1995-12-15 1998-05-12 General Electric Company Assembly arrangement for a compact fluorescent lamp
US7234973B1 (en) 2006-03-23 2007-06-26 Shelly Mark E Lighting system having modified light bulb base and luminare socket for preventing the selection of an over wattage light bulb and method of forming same
US20090230864A1 (en) * 2006-05-08 2009-09-17 Koninklijke Philips Electronics N.V. Compact hid arc lamp having shrouded arc tube and helical lead wire

Also Published As

Publication number Publication date
GB1293493A (en) 1972-10-18

Similar Documents

Publication Publication Date Title
US3209188A (en) Iodine-containing electric incandescent lamp with heat conserving envelope
ES8601563A1 (en) Incandescent lamp with high pressure rare gas filled tungsten-halogen element and transparent thick walled safety envelope.
US3706902A (en) Electric lamp with resilient base
US3484637A (en) Mercury vapour discharge lamp
US3659138A (en) Alumina-metal sealed lamp apparatus
US3445713A (en) Halogen cycle incandescent lamp
US3555338A (en) Incandescent lamp
US3286116A (en) Electric incandescent lamp filament support
US3496403A (en) Single-ended electric incandescent lamp and mount assembly therefor
US3909653A (en) Compact electric incandescent lamp having planar filament and improved mount
US4415833A (en) Tungsten halogen lamp with coiled getter
US3479548A (en) Enveloped quartz iodine lamp
GB986514A (en) Improvements in the manufacture of electric incandescent lamps
US3390299A (en) Filament supports for tubular incandescent lamps
US2425865A (en) Filament supporting structure for incandescent lamps
US3173735A (en) Capping of electric lamps
ES369613A1 (en) Metallic vapor arc-lamp having high intensity sun-like emission
US2181295A (en) Reflector bulb lamp
US3375393A (en) Incandescent lamp
US2425864A (en) Filament supporting structure for incandescent lamps
GB1286048A (en) Lamp
US4912360A (en) Lamp with two internal capsules
US2009211A (en) Gaseous electric discharge device
US3067351A (en) Aperture fluorescent lamp
US2966600A (en) Electric lamp mount