US1578358A - Electric lamp for cinematographic apparatus - Google Patents

Description

March 36, 1926; 1,578,358-

.r-:. c. PENIN ELECTRIC LAMP FOR CINEMATOGRAPHIC APPARATUS Filed Feb. 23, 1924 & Attorney.

' Patented Mar. 30, 1926. :3 Mauser-.2 cow UNITED STATES PATENT OFFICE.

EMILE CHRISTIAN PENIN, O1 JOIIiTVILLE-LB-PONT, FRANCE, ASSIGNOR TO PATHE CINEMA, ANCIENS ETAIBLISSEMENTS PATHE FBERES, OF PARIS, FRANCE.

ELECTRIC LAMP FOR CINEMATOGRAPHIC APPARATUS.

Application filed February To alike/10m it may concern:

Be it known that I, EMILE CHRISTIAN PfiNIN, a citizen of the French Republic, residing at Joinville-le-Pon-t, Seine, in the French Republic, have invented new and useful Improvements in Electric Lamps for Cinematographic Apparatus, of which the following is a specification.

This invention relates to-improvements or modifications in the device object of my copending patent application filed under No. 580,507. 1

1 Said modifications consist-in disposing on the tenon of the split ring an enlarged part or boss which is fitted into a corresponding opening formed in the socket, which latter also has various longitudinal slots It has been in't'act noticed that in the device'set forth in my patent application filed under No. 580,507, jarring motion will cause the lamp to slide in its socket andhence the filament will get "out of adjustment with reference to the optical axis of the'cmematographi-c apparatus. The improved device according to the invention obviates this drawback by adding, to the guiding tongue of the ring, the boss forming the stop-piece in conjunction withsthe socket.

In'the appended drawing which shows by way of example a form'of construction of the device according to the invention.-

Fig. 1 shows inelevation the lamp mounted in its socket.

Fig. 2 is an elevational viewon a larger scale of the lamp socket with its ring and the tenon mounted'on the latter. 7

F i 3 is an elevational view of the socket in w iich the lamp is mounted.

Fig. 4 is a horizontal section on the line A--A-of Fig. 3.

As set forth in my patent application filed under No. 580,507, one places, after adjustment, on the base 4 of the lamp a split ring 1 provided with the tenon 2, but according to 23, 1924. Serial No. 6 9 1,532.

' the invention, the tenon 2 has an enlarged part 2.

The socket 7 for receiving the lamp base t is split lengthwise at 8 for part. of its height so as to form several tongues. One of the slots 8 has an opening 9 for receiving. the enlarged part 2 of the guiding tenon 2.

it may be understood that when placing the base 4 provided with its ring soldered previously thereto,-in the socket 7, theenlarged part 2 oi thetenon 2 will separate.

the two corresponding tongues of the socket 7 and will fit into the opening 9. W hen the enlarged part, has been engaged in the said opening 9, the two tongues of the socket'7 will resume their normal position. The

tenon 2 is now perfectly maintained, and the ar-ring movements can no longer cause the,

base 4 to slide, since the stop portion formed bv the enlarged part or boss 2 acts in a siiiiiciently strong manner to prevent the same.

Having now describ my invention what I claim as new and desire to secure by Letters Patent'is:

A lighting device for projection apparatusx comprising an ordinary glow lamp, 0. ring secured to the cap of said'lamp, a lug secured on said ring andextending longit'ur dinally on said cap towards the lower part ofsaid cap, an enlarged part or boss provided on said lug and a lamp-socket on the upper edge of which is adapted to rest the lower edge ofsaid ring, saidf lamp-socket having longitudinal slots so as to form tongues and an opening in one of'sa'id slots in which is adapted to tit said enlarged-part.

of said lug for ensuring automatically the exact position in height and the exact angular position of the lamp filament.-

In testimony whereof I have signed my name .to this specification.

I EMILE CHRISTIAN PENIN.

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