US1204100A - Projector. - Google Patents

Description

C. W. & L. R. WHITE.

PROJECTORJ APPLICATKON FILED FEB. n, 1915.

1,204,190. Patented Nov. 7,1916.

IINILFFQE b 'IATF-E PATENT @FFIQE.

CLARENCE W. WHITE AND LOUIS RAY WHITE, OF NORTH BENNING'ION, VERMONT.

PROJECTOR.

Specification of Letters Patent.

Application filed February 17, 1915. Serial No. 8,728.

To all whom it may concern:

Be it known that we, CLARENCE IV. WHITE and LOUIS R. Wnrrn, both citizens of the United States, and both residing in North Bennington, county of Bennington, and State of Vermont, have invented certain ne and useful Improvements in Projectors, of which the following is a specification.

This invention relates to a reflector arrangedto carry a very powerful incandescent lamp for use as a search light and for photographic purposes and the like, and the objects of the invention are to provide a reflector with an adjustable support that is capable of adjustabiy holding a large incandescent light so that the same can easily be adjusted either in or out of focus with the reflector as may be desired.

Further objects of the invention are to provide an adjustable support that is simple in construction and cheap to manufacture.

To the accomplishment of the above objects, and to such others as may hereinafter appear, the invention comprises a reflector having a support upon which the lamp is pivotally supported for adjustment in to lation to the focal point of the reflector.

Vi e-will now proceed to describe our in reflector provided with a casing B which incloses the back of the reflector so as to provide a suitable air space around the back of the reflector as shown in Fig. 2.

Suitably secured to the casing B is a base C upon the sides of which are supported two uprights D. .To the upper ends of the uprights D is'pivotally supported a pivot.

block E to which is adjustably secured near its transverse center a lamp socket F by means of a threaded pin G, one end of which is secured to the lamp socket while the other end of the pin G passes through a transverse hole in the pivot block E. The threaded pin G is held in adjustable position in the pivot block E by means of a screw threaded nut H which fits into a longitudinal recess K in the pivot block E. A suitable lock nut L on he threaded pin G is provided for engaging the side of the pivot block E for preventing the accidental turning of the nut H. A suitable pin (1., one end of which is secured to the top of the socket F, and the other end of which passes through a hole in the pivot block E is provided to prevent the socket F turning, thereby obviating'twisting of the electrical connection 7).

The lamp socket F, supported as above described, is arranged to pass through a suitable opening in the casing B and supports an incandescent light 1 db M which passes through a suitable elongated hole in the side of the reflector A.

In order to reflect a maximum amount of light from the filament of the lamp, it is necessary that the filament of the lamp should be placed at the focal center of the reflector. From the above description it will be seen that the position of the filament N of the lamp can be adjusted longitudinally by loosening the lock nut L, and turning the adjusting nut II in the slot K. It will also be seen that the position of the filament can be adjusted transversely bv swinging the lamp on the pivot block E, which is accomplished, in the present instance, by means of a set screw O which passes through a threaded hole in the base 0. In the present instance the end of the set screw 0 simply bears against-the surface of the socket F with which it is kept in engagement by means of a coiled spring P which passes around the socket F, the ends of the spring being fastened to the base C as shown in Fig. 2.

When the lamp M is supported, as above described, the only adjustment necessary to 'bring the filament N into focus with the reflector, can be accomplished by means of the nut II and the set screw 0 as the pivot block E pivotally supports the lamp in a radial direction in the reflector.

After the lamp M has been screwed into the socket F and the nut H adjusted to bring the filament N opposite the center of the reflector, as shown in Fig. 1, all the adjustment thereafter can ordinarily be accomplished by simply adjusting the set screw 0, as the arc about which the filament N travels in relation to the pivot block E is so large as to vary the longitudinal adjustment but very little. In the present instance the length of the glass globe of the lamp is approximately nine inches and the filament N is about twelve inches from the pivot block E. From this it will be seen that any ordinary adjustment by the set screw 0 will not materially afiect the 1011- gitudinal adjustment made by the bolt H.

The pivot block E and connecting parts are ordinarily kept covered by means of a cap Q, secured to the base C as, before described, it is only ordinarily necessary to adjust the set screw 0 to bring the filament N into or out of focus with the reflector.

The reflector just described is adapted for use as a search light for tug boats and the like, and is used quite extensively in deep excavations. These reflectors are also used in photographic studios for taking photographs where it is essential that means be provided for readily adjusting the filament of the light in or out of focus depending upon whether aconcentrated or a diffused light is re uired.

The ad ustable lamp support just described is very simple in construction and cheap to manufacture, having nothing that is apt to get out of order or break, and the same is easily secured to a reflector and can readily be incased so as to take up very little space, thereby improving the appearance of the reflector.

WVhile the invention has been described with particular reference to the details of construction, the same is not to be considered as limited thereto, as many changes can be made and still fall within the scope of the invention set forth in the following claims.

What we claim is:

1. A projector comprising in combination a reflector, a pivot block, means for pivotally supporting said pivot block on the projector, an incandescent lamp socket, and

means for adjustably securing said lamp socket to said plvot block.

2. A projector comprising in combination a reflector, a pivot block, meansfor pivotally supporting said pivot block, means for supporting said pivot block supporting means on the projector, an incandescent lamp socket and means for adjustably securing said lamp socket to said pivot block.

3. A projector comprising in combination a reflector, a pivot block, means for pivotally supporting said pivot block, means for supporting said pivot block supporting means on the projector, an incandescent lamp socket, means for adjustably securing said lamp socket to said pivot block, and means for adjusting said lamp socket about said pivot block.

4. A projector comprising in combination a reflector, a pivot block, means for pivotally supporting said pivot block at right angles to the optical axis of said reflector, meansfor supporting said pivot block supporting means on the projector, an incandescent lamp socket, and means for adjustably securing said lamp socket to said pivot block.

5. A projector comprising in combination a reflector, a pivot block, means for pivotally supporting said pivot block at right angles to the optical axis of said reflector, 7

means for supporting said pivot block supporting means on the projector, an incandescent lamp socket, means for adjustably securing said lamp socket to said pivot block, and means for adjusting said lamp socket about said' pivot block. r

In testimony whereof we have signed this specification in the presenceof two subscribing witnesses.

CLARENCE W. NVHITEL LOUIS BAY WHITE. WVitnesses:

K. O. Es'rns, P. B. WEIR.

Copies of this patent may be obtained for five cents each, by addressing the (1ommissioner of Patents,

Washington, D. G. i i

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