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Publication numberUS3885185 A
Publication typeGrant
Publication dateMay 20, 1975
Filing dateMar 29, 1974
Priority dateMar 29, 1974
Publication numberUS 3885185 A, US 3885185A, US-A-3885185, US3885185 A, US3885185A
InventorsTilley Ralph E
Original AssigneeTilley Ralph E
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Incandescent lamp
US 3885185 A
Abstract
An incandescent lamp having a bulb and a male base at the trailing end thereof for placement in a conventional threaded electrical socket, the male base comprising a ring conductor secured to the necked down portion of the bulb and from which a plurality of electrically conductive resilient fingers rearwardly extend, the unrestrained composite diameter of the resilient fingers being less than the inside diameter of the conventional electrical socket. A second axial conductor projects rearwardly from the base of the lamp, being insulated from the ring connector by suitable dielectric whereby the male end of the lamp may be linearly inserted into the socket causing constriction of the fingers creating a firm electrical connection with the threaded peripheral conductor of the socket, the axial conductor of the lamp coming to rest against the exposed spring of the axial conductor of the socket whereby electrical energy is communicated to the filament of the lamp.
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Description  (OCR text may contain errors)

United States Patent [1 1 [Ill 3,885,185

Tilley 1 1 May 20, 1975 1 INCANDESCENT LAMP 1 71 ABSTRACT 1 ll 33 E. S th [76l Inventor #22:; g a 85 84] 1 I An incandescent lamp having a bulb and a male base at the trailing end thereof for placement in a conven- [ZZl Flledl 1974 tional threaded electrical socket, the male base com- App]. No.: 456,097

[52] U.S. Cl 313/318; 313/315; 339/91 L; 339/242; 339/258 R [51] Int. Cl H01] 5/48; HOlj 5/50 [58] Field of Search .1 313/315, 318; 339/242, 339/258 R, 258 P, 91 L [56] References Cited UNITED STATES PATENTS 2.081743 7/1937 St. Louis 313/318 X 2.132.578 10/1938 ReichelM... 313/318 X 2,848,643 7/1958 Spataro r i 313/318 3,040,285 6/1962 Stanley 339/258 R 3,050.705 8/1962 Benson 339/258 R 368L741 8/1972 Spezialfabrik 339/258 R 3,723.836 3/1973 Oulman et a1. 339/258 R Primary Examiner-Saxfield Chatmon, Jr. Attorney, Agent, or Firm-Lynn G. Foster prising a ring conductor secured to the necked down portion of the bulb and from which a plurality of electrically conductive resilient fingers rearwardly extend. the unrestrained composite diameter of the resilient fingers being less than the inside diameter of the conventional electrical socket. A second axial conductor projects rearwardly from the base of the lamp. being insulated from the ring connector by suitable dielectric whereby the male end of the lamp may be linearly inserted into the socket causing constriction of the tingers creating a firm electrical connection with the threaded peripheral conductor of the socket, the axial conductor of the lamp coming to rest against the exposed spring of the axial conductor of the socket whereby electrical energy is communicated to the filament of the lamp.

4 Claims, 3 Drawing Figures FATENTED HAYZOIHYS INCANDESCENT LAMP BACKGROUND 1. Field of Invention The present invention relates generally to the field of artificial light and more particularly to an improved male base at the trailing end of an incandescent lamp for linear placement in a conventional. threaded electrical socket.

2. Prior Art Many past proposals have been made for electrically connecting the male end of an incandescent lamp to an electrical socket. The standard for many years has been a lamp with a threaded trailing conductor and a trailing axial conductor separated by a suitable dielectric layer. The threaded lamp is screwed into and out of the conventional socket.

Alternatives have consisted of lamps each with a specially configurated male conductor end to be united with a specially configurated (non-standard) electrical socket. No proposal has been made for placement of an incandescent lamp rectilinearly into a standard threaded electrical socket.

BRIEF SUMMARY AND OBJECTS OF THE PRESENT INVENTION The present invention comprises an economical incandescent light bulb which is linearly press-fit into a conventional threaded electrical socket thereby eliminating the need to thread a bulb into said socket. The light bulb comprises one peripheral conductor at the reduced diameter trailing end of the bulb, having rearwardly directed resilient fingers biased radially outwardly and having an unrestrained composite diameter greater than that of the socket, the fingers being mounted to the glass of the bulb and inwardly radially displaceable counter to the memory of the fingers upon entry of the fingers into the threaded socket to firmly retain the connection.

Accordingly, it is a primary object of this invention to provide an improved incandescent light bulb to be linearly press-fit into and releasably retained in a conventional threaded electrical socket.

It is another paramount object of the present invention to provide an electric light bulb one conductor of which is disposed at the reduced diameter trailing of the bulb comprising rearwardly directed resilient conductive fingers radially biased outward having an unre strained composite diameter greater than the diameter of a conventional threaded electrical socket to accommodate radial deflection inwardly of the fingers whereby the bulb becomes releasably press-fit into the socket by axial insertion.

These and other objects and features of the present invention will be apparent from the following detailed description, taken with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective representation of a presently preferred light bulb configuration according to the present invention;

FIG. 2 is an enlarged side elevation view with parts broken away for clarity of the light bulb of FIG. 1 disposed adjacent a conventional electrical socket; and

FIG. 3 is a side elevation view similar to FIG. 2 but showing the light bulb in press-fit electrically conducting relation with the socket.

DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENT Reference is now made to FIGS. l-3 which illustrate the structure and use ofa presently preferred incandescent light bulb 10 according to the present invention Conventionally, the incandescent lamp l0 comprises a glass bulb 12 in which a filament is disposed. The glass bulb I2 is necked down or of reduced transverse diameter at the trailing end 14 thereof. the trailing end 14 being bonded or otherwise suitably physically attached to a ring conductor 16. The ring connector I6 is electrically connected to one end of the filament within the glass bulb l2 and comprises an annular collar 18 from which a plurality of rearwardly extending conductive fingers 20 project. Each finger is radially biased outwardly and rearwardly to a maximum diameter d. (FIG. 2), which is of considerably greater magnitude than the diameter d of a conventional threaded electrical socket 22.

Each finger also curls inwardly at its trailing end 24 to (a) prevent free end interference upon insertion into or removal from the socket 22, (b) restrict the amount of deflection experienced by each linger 20 by reason of contact with the rearwardly extending central refractory separator 26 and (c) prevent electrical contact with the central socket conductor. The refractory separator 26 is stepped in diameter at radially directed por tion 28 and comprises a relatively large annular wall 30 superimposed against and insulating the fingers 20 from a second axial conductor 32, the exposed end of which is also electrically insulated by a reduced diameter wall 34 of the refractory separator 26. Conductor 32 is electrically connected to the other end of the filament.

As mentioned, the socket 22 is conventional comprising a dielectric body 36 a peripheral threaded conductor 38, the diameter across the root of the threads being designated d and comprising axial socket conductor 40 connected to a conductive exposed U shaped spring 42.

In use, the incandescent lamp 10 is advanced linearly and essentially axially into initial contact with and ulti mate into retained press-fit relation within the socket 22, with the conductor 16 becoming disposed in electrical contact with the peripheral threaded conductor 38 and conductor 32 in electrical contact with the spring 42. Insertion results in a constriction of the com posite diameter from d by deflection ofthe radially biased fingers 20 to a composite diameter equal to the socket diameter (1 The fingers 20 exert an outward bias against the socket 22 when located within the socket 22 to retain in the inserted condition against inadvertent removal. The assembled condition is illustrated in FIG. 3. This approach allows for linear insertion ofa bulb in a conventional socket which is benefi' cial to the infirmed and useful when a socket is located in a hard to reach place.

The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiment is therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the fore going description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

What is claimed and desired to be secured by United States Letters Patent is:

1. An incandescent lamp for rectilinear insertion into press-fit conducting relation with a conventional threaded electrical socket comprising:

a bulb having an axis. the bulb containing a filament and having a necked down trailing end;

first conductor means connected to one end of the filament and mounted to the necked down trailing end of the bulb, said first conductor means comprising a plurality of axially extending, rearwardly directed, and outwardly radially biased resilient conductive fingers with memory, each finger being initially resiliently biased a predetermined radial distance from the axis of the bulb to form an initial composite diameter greater than the diameter of said threaded socket;

second conductor means carried in exposed relation gers are each joined to a conductive ring carried at the trailing end of the bulb and comprising said first conductor means.

3. The incandescent lamp of claim I wherein each finger is inwardly curved so that the free end thereof is situated well within said composite diameter.

4. The incandescent lamp of claim 1 wherein said electrically insulating means is stepped.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2087743 *Dec 16, 1935Jul 20, 1937Gen Electric Vapor Lamp CoElectric gaseous discharge device
US2132578 *Sep 24, 1937Oct 11, 1938Bendix Aviat CorpIlluminating means for indicating instruments
US2848643 *May 26, 1955Aug 19, 1958Lucy SpataroElectric lamps
US3040285 *May 23, 1960Jun 19, 1962Watts Electric & Mfg CoConnector structure
US3050705 *Jul 14, 1959Aug 21, 1962United Carr Fastener CorpElectrical assembly
US3681741 *Nov 9, 1970Aug 1, 1972Rafi Raimund Finsterholgl ElekHolder for electrical lamps with a glass base cap
US3723836 *Mar 15, 1972Mar 27, 1973Motorola IncHigh power semiconductor device included in a standard outline housing
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4061943 *Aug 16, 1976Dec 6, 1977Gte Sylvania IncorporatedCathode ray tube with supported conductor extending through exhaust tubulation
US4384236 *Aug 8, 1980May 17, 1983U.S. Philips CorporationElectric lamp with a sleeve-shaped cap
US4496874 *May 10, 1982Jan 29, 1985U.S. Philips CorporationElectric lamp having a mechanically connected lamp cap
US5700154 *Nov 14, 1995Dec 23, 1997Progressive Technology In Lighting, Inc.Multi-component lamp adaptor assembly
US5707246 *Jan 16, 1996Jan 13, 1998Progressive Technology In Lighting, Inc.Security device for lamp adaptor
US5744901 *Aug 29, 1996Apr 28, 1998U.S. Philips CorporationElectric reflector lamp
US5760537 *Oct 24, 1996Jun 2, 1998U.S. Philips CorporationCapped electric lamp
US6825620Sep 18, 2002Nov 30, 2004Access Business Group International LlcInductively coupled ballast circuit
US6922009 *Dec 4, 2002Jul 26, 2005Koninklijke Philips Electronics N.V.Electric lamp
US6963161 *Apr 28, 2003Nov 8, 2005Goslav MisztalLight bulb assembly having a light bulb with the ability to change color
US7118240Jan 14, 2005Oct 10, 2006Access Business Group International LlcInductively powered apparatus
US7126450Feb 4, 2003Oct 24, 2006Access Business Group International LlcInductively powered apparatus
US7180248Oct 22, 2004Feb 20, 2007Access Business Group International, LlcInductively coupled ballast circuit
US7233222Jan 14, 2005Jun 19, 2007Access Business Group International LlcInductively powered apparatus
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US7427839Jan 14, 2005Sep 23, 2008Access Business Group International LlcInductively powered apparatus
US7439684Aug 29, 2006Oct 21, 2008Access Business Group International LlcInductive lamp assembly
US7462951Aug 11, 2004Dec 9, 2008Access Business Group International LlcPortable inductive power station
US7612528Jun 18, 2004Nov 3, 2009Access Business Group International LlcVehicle interface
US7615936Apr 27, 2007Nov 10, 2009Access Business Group International LlcInductively powered apparatus
US7639110Aug 29, 2006Dec 29, 2009Access Business Group International LlcInductively powered apparatus
US8138875Nov 5, 2009Mar 20, 2012Access Business Group International LlcInductively powered apparatus
US20120236602 *Feb 9, 2012Sep 20, 2012Leader International CorporationFlat led lamp assembly
WO2012178198A2 *Jun 25, 2012Dec 27, 2012Sherman GingerellaLed light fixture with press-fit fixture housing heat sink
WO2014011930A2 *Jul 11, 2013Jan 16, 2014Leader International CorporationFlat led lamp assembly
Classifications
U.S. Classification313/318.3, 439/366, 313/315, 439/613, 313/318.4
International ClassificationH01K1/42
Cooperative ClassificationH01K1/42
European ClassificationH01K1/42