US1742683A

US1742683A - Lamp focusing device

Info

Publication number: US1742683A
Application number: US172585A
Authority: US
Inventors: Blackmore Lloyd
Original assignee: Motors Liquidation Co
Current assignee: Motors Liquidation Co
Priority date: 1927-03-04
Filing date: 1927-03-04
Publication date: 1930-01-07
Anticipated expiration: 1947-01-07

Description

Jan. 7, 1930. BLACKMORE 1,742,683

LAMP FOCUSING DEVICE Filed March 4. 1927 Patented Jan. 7, 1930 UNITED STATES "PATEL-TNT OFFICE LLOYD BLACKMORE, OF DETROIT, MICHIGAN, AS SIGNOR TO GENERAL MOTORS COR- PORATION, OF DETROIT, MICHIGAN, A CORPORATION OF DELAWARE LAMP rocusnve DEVICE Application filed March 4, 1927. Serial No. 172,585.

This invention relates to headlamps used on automotive vehicles and especially to the adjustment of the lamp socket.

The bulb of the lamp is mounted in the com ventional socket which has secured thereto a bracket with return bent ends. One of these ends catches into an opening in the reflecting surface immediately below the socket and serves as a pivot for the lamp. The other 1 end encloses a nut through which is passed a threaded rod having its end upset and its opposite end extending without the lamp housing where it terminates in an operating handle. The ends of the return bends face each other and are surrounded by a coil spring which tends to urge the more distant end away from the lamp reflector. By rotating the rod, the angle of incline of the socket will be changed.

In the preferred form of the invention instead of using a bracket, I press a lug outwardly from the lamp socket and form this lug into a hook which engages in an opening in the lamp reflector. A nut, which may be the terminal block of the socket, is rigidly secured in any suitable way on the rear end of the socket and through this nut a rod is threaded the outer end of which extends through the lamp casing and terminates in an operating handle. A coil spring surrounds the socket and tends to urge it rearwardly.

The invention has resulted'ina considerable reduction in the number of parts and brings about a much greater simplification of structure, and by the use of a single spring all parts are held firmly but resiliently in ad justed position. The reduction in the number of parts makes a much cheaper construction and considerably reduces the labor of assembly.

The invention is disclosed in the accompanying drawing in which Figure 1 is a sectional view of an automobile headlamp with my invention applied thereto.

Figure 2 is a detail view of a modification of Figure 1.

Figure 3 is an enlarged detail of a portion of the structure in Figure 2.

Referring to the numbered parts of the drawing, 10 indicates a headlamp casing, 11 Q which lug engages in an opening 16 in the reflector at the bottom side of the socket 14.

, The rear end of the socket 141: has an opening 17 over which is secured in any suitable way a nut 18 through which extends a threaded rod 19 having an upset end 20. The rod 19 extends without the casing and terminates in an operating handle or knob 22 and by turning the knob 22 it. is obvious that the rear end of the socket 14 will be raised or lowered due to the threaded contact of the nut 18 and rod 19. A washer 28 is secured to the rod 19 inside the casing to properly hold it in position. The socket will pivot at the point of engagement of the hook 15 in the openingv 16 of the reflector.

A coil spring 21 surrounds the socket 14: and tends to urge it rearwardly.

Referring to Figure 2, it will be noted that instead of the lug 15, I'make use of a bracket 23 secured to the socket 14 and having its ends return bent as shown at 24: and 25. The end 24 engages in the opening 16 in the lamp reflector to serve as a pivoting point while the opposite end 25 is provided with an opening 26 through which is passed the operating rod 19. Confined in the return bend of the end 25 is a nut 18 and by turning the rod 19 the socket 14 will be angularly adjusted due to thethreaded contact between the nut 18 and the rod 19. 7

Spring 27 extends between the return bent ends and tends to urge the socket rearwardly.

I claim:

A headlamp comprising a casing, a reflector in the casing provided with an aperture, I

a lamp socket mounted in the aperture for tilting movement, said socket being provided with a bent over tongue engaging the reflector and limiting the movement of the socket rearwardly of the reflector, an adjusting screw engaging the socket, a nut on one end of the screw adapted to be moved along the screw by rotation of the latter and to engage the socket to effect tilting thereof, the other end of the adjusting screw extending through the 3xterior of the housing, and a spring encircling the socket and reacting at one end against the rear of the reflector, and at the other end against said screw to hold the parts in adjusted position. V In testimony whereof I aflix my signature.

LLOYD BLAGKMORE.