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Publication numberUS2053138 A
Publication typeGrant
Publication dateSep 1, 1936
Filing dateJun 20, 1935
Priority dateJun 20, 1935
Publication numberUS 2053138 A, US 2053138A, US-A-2053138, US2053138 A, US2053138A
InventorsDonovan John F
Original AssigneeGen Electric
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Miniature incandescent lamp
US 2053138 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

'Sept. '1, 193 J. F. DCNOVAN 2,053,138

MINIATURE INCANDES CENT LAMP Filed June 20, 1955 Fig. 2.

Inventor John F Donovan,

is Attorney.

Patented Sept. I, 1936 screens:

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4 Claims.

My invention relates to electric lamps and more particularly to the base or terminal portion there- J of which, when fitted into an appropriate socket,

- following description of species thereof and from my invention; Fig. 3 is a section at the line 3,-3 I

the drawing.

In the drawing Figs. 1 and 2 are front and side elevations of an incandescent lamp comprising of Fig. 2; Fig. 4 is a modification; Fig. 5 is a section at the line 55 of Fig. 4; Fig. 6 is a somewhat diagrammatic elevation partly in section of apparatus used in the manufacture of the modification in Fig. l; and Fig. 7 is an elevation, part- 117 in section, of a receptacle having one of the lamps comprising my invention mounted therein.

Referring to Figs. 1 to 3, the lamp comprises a bulb it having a reduced cylindrical neck portion it and containing a filament it mounted on lead wires 3 which are held in spaced relation by a glass head it. The lamp is of the butt-seal type in which portions of the leads it are sealed in the glass of the joint formed by the end of the rectly inserted in a socket andto prevent it from rotating therein, the neck portion iiis preferahly provided with apair of longitudinally extending protuberances it which are preferably blown therein at the time the bulb is blown.

In the modification shown in Figs. and 5, the outer leads it are held in place by a band it of plastic insulating material, such as sealing wan or cement. encircling the neck ll of the bulb and having protuberances 20 in which the said outer leads are embedded. The said band l9 may be applied to the neck portion H of the bulb from the periphery of a rotating disc or wheel 24 (Fig. 6) which carries the insulating material up from a container 25 and is brought in contact with the said neck H to deposit the insulating material thereon. The periphery of the said wheel is provided with notches 26 which carry an excess of the insulating material to form the protuberant portions 20 of the band iii.

In Fig. 7, the lamp I0 is shown mounted in a receptacle 2! of the imitation candle type which comprises a tube 22 of insulating material, such as cardboard having a pair of arcuate terminal members 23 mounted therein. The longitudinal protuberances i8 on the bulb neck I! flt'between the sides of the terminal members 23, it being impossible to insert the lamp in any other position. The said protuberances l8 thereby insure that the lamp is correctly positioned in the receptacle or socket so that the outer leads I6 are in contact withthe socket terminals 23, and they also prevent rotation of the lamp in the socket so that the leads it cannot be twisted off.

What I claim as new and desire to secure by Letters Patent of the United States is:

1. An electric lamp comprising a bulb having a neck portion, a pair of lead wires having portions thereof sealed in the walls of said neck portion and extending longitudinally of said neck portion on opposite sides of theouter surface thereof and a band of insulating material encircling said neck portion of said bulb and the ends of said lead wires for holding said lead wires in position on said neck portion of said bulb. Y

2. An electric lamp comprising a'bulb having'a neck portion, a pair of lead wires having portions thereof sealed in the walls of said neck portion and extending longitudinally of said neck portion on opposite sides of the outer surface thereof and a band. of plastic insulating materialencircling

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2881405 *Mar 7, 1956Apr 7, 1959Philco CorpMounting apparatus
US2999180 *Jul 11, 1957Sep 5, 1961British Thomson Houston Co LtdElectric lamps
US3206713 *Mar 21, 1962Sep 14, 1965Horan John JLamp having resilient terminals
US3327283 *Mar 9, 1965Jun 20, 1967Sylvania Electric ProdPhotoflash lamp
US3369144 *Mar 22, 1965Feb 13, 1968Rival Lamps LtdCapless lamps
US3548243 *Jun 21, 1968Dec 15, 1970Magherini DinoElectric light bulb and terminal cap assembly
US3876896 *Jan 30, 1974Apr 8, 1975Albrecht Kg WSubminiature incandescent bulb with lateral contact elements
US3881798 *Dec 2, 1971May 6, 1975John J HoranSnap-in electric lamp
US3892463 *Sep 13, 1971Jul 1, 1975Horan John JSnap-latching, snap-lighting electric lamps and methods for making same
US3986068 *Apr 28, 1975Oct 12, 1976W. Albrecht KgMiniature indicating lamp
US4724353 *Jun 27, 1986Feb 9, 1988Gte Products CorporationElectric lamp with insulating base
US20040264183 *Jun 26, 2003Dec 30, 2004Chin-Chun PanChristmas lamp bulb
U.S. Classification439/619, 313/318.12, 118/232, 118/204
International ClassificationH01K1/42, H01K1/44
Cooperative ClassificationH01K1/44
European ClassificationH01K1/44