US1416394A - William g - Google Patents

Description

w. e, WOOD.

FOCUSING DEVICE.

APPLICATION FILED SEPT.23, I920.

Patented May 16, 1922.

, INVENTOI. W G'- Wood BY am! ATTORNEY UNITED STATES PATENT 1 OFFICE.

WILLIAM G, WOOD, OF SAN FRANCISCO, CALIFORNIA, ASSIG-NOR TO BERKELEY LIGHT CORPORATION, OF SAN FRANCISCO, CALIFORNIA, A. CORPORATION 01? NEVADA.

FOCUSI'NG DEVICE.

Specification of Letters Patent. Patented luay 16, 1922.

Application filed September 23, 1920. Serial No. 412,264.

T 0 @ZZ whom it may concern:

Be it known that I, lViL-LIAM G. Woon, a citizen of the United States, residing at San Francisco, in the county of San 1 rancisco and State of California, have invented new and useful Improvements in Focusing Dovices, of which the following is a specifica- This invention relates to headlights and projectors and more particularly to a support for the socket of anincandescent lamp whereby the lamp may be universally adjusted with relation to the reflector, The object is to simplify and improve the construction and operation of a device of this character.

Two forms which my invention may assume are exemplified in the following description and illustrated in the accompanying drawing, in which Fig. 1 shows a cen tral longitudinal sectional view of a lamp embodying my invention.

Fig. 2 shows a sectional viewoi a modified form of the same.

Referring in detail to the form shown in l ig. 1, I employ a reflector 10 having an opening at its base or rear central portion in which is fitted a cylindrical boss 11 having a flared endlQ seated inside of the reflector.

This boss is held. in place by a sci;'ewthrcaded interior diameter of the boss so as to aflord.

suflicient space for universally adjusting the socket within, This socket carries a lamp 15 at its inner end and at its outer end is arranged to receive a plug (not shown) for forming an electrical connection. The intermediate portion of the socket is screwthreaded on its exterior and is supported by an adjusting member 16 formed with a cylindrical body portion screw-threaded intoriorly and a bellshaped inner end. 1'? flared or curved outwardly in the form of an are. This hell-shaped portion of the adjusting member has its interior portion resting against the adjacent end of the boss 11. A clamping member 18 is screw-threaded on to the exterior of the ring 1.3 and has an inturned flange 19 to enga e the exterior of the bellshaped portion 1? and clamp the same socurely against the end of the boss. A lock nut 20 is carried on the socket member 14 to prevent turning of the latter after. the parts are once fixed in position. In operation when the parts of the focusing device are loosened. the socket may be moved axially in a straight line by turning the socket relatively to the adjusting member 16 whereby to obtain the desired length of projection of the lamp within the reflector. The socket may be moved angularly in any direction to position the lamp properly, either in or out of focus with the reflector, by reason of the arcuate or bell-shaped seat formed by the adjusting member inengagement with the boss 11. The desired position of the lamp having been determined and the lamp fixed in accordance therewith, the parts are then looked in position by turning the clamping member up against the end of the adjusting member. Thereafter the parts may be locked against axial movement by turning the nut 20 against the adjusting member 16.

It will be noted that the parts are readily and easily assembled and removed. When the clamp is turned off of the ring 13 the socket may be withdrawn from its position within the boss and thereafter the boss may be taken oil by unscrewing from the ring 13. The ring may be loose or fixed upon the re flector as desired, but in the present instance I have shown it loosely seated against the rear of the reflector and have illustrated depressions 21 therein which are designed to receive projections on a spanner wrench whereby to turn the ring or otherwise ma; nipulate it for putting the parts together.

lin Fig. 2 I show the boss 11 formed integral with the reflector, and employ a socket member 14 which is slidably connected with the adjusting member 16. The slidable parts are fixed in adjusted position by means of a set screw Various changes in the construction and arrangement of the several parts herein shown and described may be employed without departing from the spirit of my invention as disclosed in the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. In a headlight or projector, a reflector having a boss arranged in its base, a lamp socket carried loosely within the boss, an adjusting member on the socket having a bell-shaped portion to fit over the end of the Q 1,415 sea boss and clamping means carried by the re- Hector to fix the adjusting member in any desired position with reference to the boss whereby to retain the socket member in adjusted position.

2. In a headlight or projector the combination with a reflector, an enlarged boss ar ranged at the base of the reflector, a socket loosely carried Within the boss and spaced from the walls thereof, an adjusting member supporting the socket member and permitting axial adjustment of the latter, said adjusting member having a. bell-shaped end resting at its interior against the end of the boss and a clamping member screw-threaded on a stationary part of the reflector and pro vided With means to engage the exterior of the bell-shaped end of the adjusting member whereby to clamp the latter in adjusted position against the boss.

In a headlight or projector the combination with a reflector, an enlarged boss forming an opening in the base of the reflector, a ring on the exterior of the reflector surrounding the boss, a socket member arranged loosely Within, the boss and spaced from the sides thereof, an adjusting member supporting the socket member and permitting axial adjustment of the latter said adjusting member having a bell-shaped end adapted to seat at its interior against the end of the boss and permitting the socket member to be adjusted angularly with reference to the boss, and a clamping member screwthreaded on the exterior of the ring and having a portion to engage the exterior or" the bell-shaped end of the adjustin member whereby to clamp the latter in adjusted position upon the boss.

In testimony whereof I have hereunto set my hand in the presence of two subscribing Witnesses.

WILLIAM G. WOOD Witnesses JOHN H. HERRING, W. W. HEALEY.

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