US2091820A

US2091820A - Projector

Info

Publication number: US2091820A
Application number: US50453A
Authority: US
Inventors: Kiefer Johannes
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1934-12-06
Filing date: 1935-11-18
Publication date: 1937-08-31
Anticipated expiration: 1954-08-31

Description

1937- .1; n-iF ER I I PROJECTOR "Filed Nov. 18, 1sss Fig. 2

Inventor Johannes Kiefgr; l b fi w; 2. ALMA Attorney.

Patented Aug. 3h 1937 PATENT OFFICE PROJECTOR Johannes Kiefer, Berlin-Charlottenburg, Germany, assignor to General Electric Company,

a corporation of New York Application November 18,1935, Serial No. 50,453

In Germany December 6, 1934 1 Claim.

in connection with the accompanying drawing,

and its scope will be pointed out in the appended claim.

l In the accompanying drawing l: have illustrated, in Fig.1, one embodiment of my invention comprising a projector lamp mounted upon an improved support through which a cooling medium is supplied to cool the lamp. Fig. 2 is a side view of the support, and Fig. 3' is a sectional view looking in the direction of the arrows 3-3 in Fig. l. Referring to the drawing in detail, I have illustrated a lamp support'comprising a tubular stem 4 terminating in branches 5 and 6 which are angularly spaced with respect to each other. I have illustrated only two branches but it is obvious that any number may be employed. A a collar 1, as illustrated in Fig. 3, is attached to the branches 5 and 6 respectively at right angles I to the axis of the stem 4. The collar is provided witha removableportion 8 which is attached to the collar inany convenient manner such as, for

example, by means of screws 9 and iii. A lamp socket i I is supported by the collar 1 and in turn supports alamp 12. .As above stated, this lamp may be either a gaseous discharge lamp or an incandescent filament lamp, but preferably the latter, because it approaches more nearly a point source of intense light whichis specially suited for projection purposes. The envelope for this type of lamp is as a rule made of glass which due to the intense heat developed during operation of the lamp rises to temperatures high enough to soften the glass. In order to avoid this, some cooling means must be provided which .will not interfere with the emission of the light from the lamp and simultaneouslywill beof simple construction.

The tubular branches 5 and 6 change their direction beyond the collar 1 and are thereafter parallel to each other and to the socket II. The branches terminate in nomles l3 and II which extend substantially to the edge of the lamp socket II. The nozzles are arranged to project a narrow film of air and to project this film along the surface of the lamp. The nozzlesare made sufficiently broad so that ,the'sheets of air projecting from thenozzle. substantially envelop the lamp. During operation of the lamp l2, air is supplied to the stem 4 in any convenient manner such as through a rubber hose, for example, and is distributed to the branches 5 and 8, and finally projected from the nozzles "and II.

A reflector l5 for the lamp may be supported from the nozzle l3 by means of a lug l8, attached. to the nozzle l4, and by an adjustable rod I1.

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

I In a light projector, the combination of a lamp, a support therefor comprising a tubular member terminating in a plurality of branches, a collar attached to said branches, a socket attached to said collar, said branches being provided with nozzles directed toward the surface of said lamp whereby a cooling medium may be projected over the surface of said lamp.

JOHANNEB KID!" 1H