US1987427A

US1987427A - Electric lamp

Info

Publication number: US1987427A
Application number: US700267A
Authority: US
Inventors: Estell M Watson
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1933-11-29
Filing date: 1933-11-29
Publication date: 1935-01-08
Anticipated expiration: 1952-01-08
Also published as: BE406398A; GB439593A; FR782179A

Description

E. M. WATSON Jan. 8, 1935.

ELECTRIC LAMP Filed Nov. 29, 1933 INVENTUR. Es TELL MRI Arson,

.FZE'E ATTURNEY.

Patented Jan. 8, 1935 I mormcnm Eltell M. Watson, Cleveland Heights, H0, usignor to General Electric Comparing corpora- -tion of New York Application November 29, 1933. Serial No. 700,287 7 Claims. (01. 116-32) My invention relates to electric lamps and sim- 12 is welded. and a disc 19 which is attached to ilar devices comprising an electric energy transsaid ring 15 by a collar or ring 20 of glass and lati'on element, such as a filament, sealed in a which is welded to leadwire 11. The ring 15 and bulb disc 19 are of a metal or alloy which has substan- Here'tofore, the practice has been to provide a tially the same .coefilcient of expansion as the separate base for such devices which is cemented glass parts sealed thereto. One such alloy which to the closed neck of the bulb, the mount," comalso wets" well to the glass consists substantially prising the energy translation element and its of 73 per cent iron and '27 per cent chromium. supporting structure, being supported by the bulb. The base flanges are preferably of diflerent width According to my invention, a metal base is and in this instance have been stitfened by a sealed directly to the open neck of the bulb, thus downwardly bent flange 21. The glass collar 20 actually constituting a portion of the bulb wall, of the base serves to facilitate attachment of the and the mount is supported by the said metal base bulb-.13 to the base as the neck thereof is sealed independently of the glass bulb. The said base is to said collar, and also serves to support the filaprovided with engagement means for mounting ment 10 by means of a plurality of wires 22 parthe lamp in a socket and is especially adaptable tially embedded therein and extending upward for precision lamps, in which the light source, or and engaging intermediate sections of said filafilament, must bear a definite predetermined rement. The lamp is preferably exhausted through lation' to the base. The present practice consists aperture 23 in disc 19 which is then closed by a in mounting the filament in the bulb and then body 24 of glass sealed thereto.

attachingthe base to the bulb so that it is accu- The modification f y inv n ion shown in rately located with respect to the filament. Ac- Figs- 4 and 5 comprises a bu b 25 in which is cording to the present invention the filament is t d, tw n ad W s 6 a d '7, the filaaccurately mounted directly on the base so that it ment 28. The wi es 26. 2'1 ex end upwa d from 25 bears a definite predetermined relation to the enthe base 29. The wire 26 is welded to etal gagement means on said base, after which the ring 30 which is provided with a pair 01 pp s bulb is sealed to the base. The lam can be used disp s d and utward y xtendin flan s or lu s to advantage in projectors comprising a

reflector

31 and 32 and which is sealed to the neck of the or lens with respect to which the filament must u b 5 as own. The wire 27 is welded to disc 30 be accurately located, since standard lamps made 33 which is sealed to e 6 -1 1 r ng 34 01 glass according to my invention may be interchanged which is also sealed to ring 30. The intermediate without the necessity of focusing adjustments. po t of the filament are upported by a plu- Further features and advantages of my invention 1 1' Wires 35 extending m a glass arbor 36 will appear from the following detailed descripwhich pr f a y s ta t an w dly and 35 tion thereof and from the drawing. p y extending 8 p 37 01! ring 30. T e In the drawing, Fig. 1 is a perspective view of lamp is evacuated through pe ure 38 in disc 33 an incandescent electric 1 1 my invention; which is then closed by a mass 39 of glass sealed Fig. 2 is a longitudinal section therethrough; Fig. theret 3 is a transverse section through said lamp along A socket suitable for either of the lamps d 0 line 33 of Fig. 2; Fig. 4 is a longitudinal section scribed is shown in 6- This device consists 40 through a modified lamp of my invention; Fig. 5 of an insulating dy 50 in which is mounted'a is a transverse section through said modification metal shell 4 ml a p n a h of which conalong line 55 of Fig. 4; and Fig. 6 is a perspecstitutes a terminal element. The shell is protive view partially in section of a socket suitabl vided with a recessed portion or annular shoulder 5 for use with the lamp of my invention. 43 d a p 01 flanges 4 nd 4 so posed Referring now to the drawing and particularly as to Provide unequal p n n therebetween of to the lamp illustrated in Figs. 1, 2 and 3, said substantially the same size as the lamp base lamp comprises a. filament 10 the ends of which flanges. Each of th fla s 4 45 is provided are mounted on lead wires 11 and 12 in the bulb with a downwardly extending lip 46 which pre- 5 13. The opposite ends of each of the lead wires vents the base from being turned counterclock- 50 are mounted on separate conductive portions of wise after insertion and with depressed portions the base 14. The base comprises a metal ring 15 47 which lock the base flanges in place after they having a pair of oppositely disposed flanges or have been inserted thereunder by a clockwise rolugs 16 and 1'? extending therefrom and an intation of the lamp. Pin 42 engages the base disc 66 wardly extending lug or lip 18 to which lead 'wire and is urged upward against the bottom of said disc by spring 48. To insert the lamp in the socket, it is advanced toward said socket so that the base flanges are brought opposite the proper openings between the socket flanges 44, 45 whereupon the said lamp is pushed downward and turned clockwise until the base flanges are located behind the depressed portions 47 of said socket flanges. In this position, the base flanges engage the lower surface of the socket flanges between lip 46 thereof and depression 4'7, and the disc of the lamp base is in engagement with pin 42.

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

1. An electric lamp or similar device comprising a bulb, a base comprising a metal ring portion sealed to the walls of an opening in said bulb and having engagement means for mounting said lamp and a metal disc sealed to said ring portion over said opening insaid bulb through the medium of an insulating collar of plastic material, an energy translation element in said bulb, and a pair of leading-in wires each connected at one end to one end of said translation element, the opposite ends of said leading-in wires being attached respectively to said ring and disc portions of said base.

2. An electric lamp or similar device comprising a bulb, a base comprising a metal ring portion sealed to the walls of an opening in said bulb and having engagement means for mounting said lamp and a metal disc sealed to said ring portion through the medium of an insulating collar of plastic material, an energy translation element in said bulb, a pair of leading-in wires each connected at one end to one end of said translation element, the opposite ends of said leading-in wires being attached respectively to said ring and disc portions of said base, and a plurality of support wires engaging portions of said translation element and having their ends embedded in said insulating collar.

3. An electric lamp or similar device comprising a bulb, a base comprising a metal ring portion sealed to the walls of an opening in said bulb and having engagement means for mounting said lamp and an inwardly extendinglug and a metal disc sealed to said ring portion over said opening in said bulb through the medium of an insulating collar of plastic material, said lug projecting into said bulb through said insulating collar, an energy translation element in said bulb, and a pair of leading-in wires each connected at one end to one end of said translation element, the opposite ends of said leading-in wires being attached respectively to said inwardly projecting lug and disc portions of said base.

4. An electric lamp or similar device comprising a bulb, a base comprising a metal ring portion sealed to the walls of an opening in said bulb and having laterallyand outwardly extending engagement means for mounting said lamp and a metal disc sealed to said ring portion over said opening in said bulb through the medium of an insulating collar of plastic material, an energy translation element in said bulb, and a pair of leading-in wires each connected at one end to one end of said translation element, the opposite ends of said leading-in wires being attached respectively to said ring and disc portions of said base.

5. An electric, lamp or similar device comprising a bulb, a base comprising a metal ring portion sealed to the walls of an opening in said bulb and having laterally outwardly extending engagement means and a lug extending inwardly into said bulb and a metal disc sealed to said ring portion through the medium of an insulating collar of plastic material, an energy translation element in said bulb, a pair of leading-in wires each connected at one end to one end ofsaid translation element. the opposite ends of said leading-in wires being attached respectively to said inwardly extending lug and disc portions of said base, an insulating arbor mounted on said lug and extending upwardly in said bulb, and a plurality of support wires mounted on said arbor and engaging portions of said energy translation element.

6. An electric lamp or similar device comprising a bulb, a base comprising a metal terminal ring portion sealed to the walls of an opening in said bulb and having engagement means for mounting said lamp and a metal terminal disc sealed to said terminal ring portion over said opening in said bulb through the medium of an insulating collar of fusible material, said terminal disc constituting the end wall of the bulb, an energy translation element in said bulb, and a pair of leading-in wires each connected at one end to one end of said translation element, the opposite ends of said leading-in wires being attached respectively to said ring and disc portions of said base.

7. An electric lamp or similar device comprising a bulb, a base comprising a metal terminal ring portion sealed to the walls of an opening in said bulb and having engagement means for mounting said lamp and a metal terminal disc sealed to said terminal ring portion over said opening in said bulb through the medium of an insulating collar of fusible material, said terminal disc constituting the end wall of the bulb, an energy translation element in said bulb, and a pair of leading-in wires each connected at one end to one end of said translation element, the opposite ends of said leading-in wires being attached respectively to said ring and disc portions of said base, and at least one support wire engaging a portion of said translation element and having its end embedded in said collar.

ESTELL M. WATSON.