US1658550A - Adjustable light support for reflectors - Google Patents

Description

Feb. 7, 1928. 1,658,550

- L. BLACKMORE ADJUSTABLE LIGHT SUPPORT FOR REFLECTORS Filed July 5, 1925 2 Sheets-Sheet 1 Feb. 7, 1928. 1,658,550

1.. BLACKMORE ADJUSTABLE LIGHT SUPPORT FOR REFLECTORS Filed July 5, 1925 Sheets-Sheet 2 fit) Fat tented Feb. 7, 1928.

tl'NlTE'D STATES PATENT cri ics.

LLUZ'D BLAOI IMGEE, Q1 'I'IIGHLAI-ID PARK, MICHIGAN, ASS'ZGNGR T0 GENERAL MOTORS CGRFGEATIQH; 0F DETEDLC'I, MICHIGAN, A CORPORATION DEEAVZLARE.

AIDEUS'IABLE LIGHT SUPPQRT FOR REFLEGTOBS.

Application filed July 3, 1925. Serial Ho. 41 33-4 In the present day automobile headlight, consisting essentially of a light source and a reflector, it is necessary to providean adjusting means which will permit considerable variation in the position oi? the light soiu'cc in the reflector so as to secure the desired distribution of the reflected light. T iis is because the parts of the lamp and casing are not manufactured with suilicient accuracy nor arethe filaments positioned in the bulb with sutiicient precision to permit of the latter being fiXQd in position in the lamp.

The adjusting means which I have devised affords the required adjustments and at the same time holds the light source so securely in its adjusted position that it. will not become loosened as a result of vibration of the car. it is also of very simple but sturdy construction and may be cheaply manufactured and easily assembled.

In the drawings:

Figure 1 is atragmentary view of an automobile headlight with parts in section showing my adjustable light support in po sition;

Figure 2 is a section on line 2-2 of Fig ure 1;

Figure 3 is an enlarged View of a detail; and

Figures 4: and 5 are views corresponding to Figure l but showing modified forms.

Referring to Figure 1, 2 indicates an automobile headlight casino; which may be of any preferred shape, while l indicates a reflector secured within the casing and serving to project the rays emanating from the customary light bulb shown at 6. T he reilector iis pr vided with an opening 8 through which projects the socket 10 in which is mounted the light bulb. lhc socket iits loosely within the opening to permit. oi the adjustments to be later described. To the socket 10 is secured a member 12 having at its forward end spring fingers 141-, shown in detail in Figures 2 and 3, which are adapted to project into aperture 16 formed in the reflector adjacent the opening 8. lhe spring lingers 14L normally diverge and are compressed for insertion in the aperture 16. Vi hen released they irictionally engage the edges of the aperture and serve very effectively tor yieldingly mounting the socket in the reflector so as to permit longitudinal and rocking adjustmmit thereof while at the same time. holding the socket securely in position so that it will not become loosened as a result of vibrations of the car. i

The other end of the member 12 is providedwithan apertured upturned end 18 for engagement with an adjusting; means consisting of a screw L 0 fitting loosely within an aperture 22 in the rear wallet the lamp casing. The screw 20 is provided with means to trictionally gripthe casing so as tohold the assembly in adjusted position. This means consists of washers 24 encircling the screw and arranged one inside and one outside the casing. The springQdivhih encircles the screw, hearing. at. one end against the rip-turned end 18 of the member 12 and at the other end against the inner aslier 24. serves to trict-ionally grip the wall betweentlie two washers and holds the assemhly in any position of rocking adjustment. Atthe same time by tensicning the part 18 with respect to the screw it acts as aspring washer to hold the assembly in any position of longitudinal adjustment.

it is now apparent that by rotating the screw 20 the lightning assembly may be moved longitudinally either inwardly or outwardly with respect to the reflector, the fingers let sliding in the aperture 16. The whole assembly may also be rotated about the tulcrun'i aii'orded by the parts ldand 16 and, in whatever vay the assembly may be adjusted, the spring 26 will yieldingly hold it in position.

The modification shown in Figure l ditters from that shown in the preceding fig ures only in that the reflector is provided with a plurality of apertures 28 and 29 in place of the single aperture 16 and a U- shaped member is substituted for the member 12, the ends of the legs of the U engaging in the apertures 28 and 29 under tension; that is, the U-shaped member is slightly compressed for insertion of its ends in the apertures and its consequent tendency to expand causes it to grip the reflector. The end of each leg of the U is preferably also provided with resilient tongues 36 as in the preceding form. The adjusting screw 20 is threaded in the base 84 of the U.

in the modification shown in Figure 5 I have substituted for the member 12 of Figure 1 a member 38 provided with a portion 4-0 for engagement in the aperture 42 in the reflector and with a down-turned portion 44;

for engagement with the adjusting screw 20. This arrangement is particularly adapted for head lamps in which there isbut slight space between the reflector and the rear of the lamp casing. j

Ifpreferred, the partAO may be slit to form spring fingers as in the other form.

I claim:

1. The combination of a reflector having a an opening therein, a lamp socket adapted to support a lamp in said opening, said re flector being provided with an apertureadjacent said opening, a part secured to said lamp socketand having frictionally gripping engagement with said aperture for supporting said socket and permitting adjustment of the latter, said part being provided with an end portion extending at an angle to the main portion thereof, a lamp ing, said reflector being provided with a plurality of apertures adjacent said opening, a resilient U-shaped member secured to said mounting, the ends of the legs of the U-shaped member being adapted to engage in said apertures under tension for adjust ably positioning said mounting with respect to the reflector.

i. The structure as defined by claim 3, and means engaging said U-shaped member for positively adjusting said mounting with respect to said reflector.

5. The structure as defined by claim 3, and a lamp casing enclosing said reflector and provided with an aperture, means passing loosely through saidaperture and provided with devices having frictional engagement with the casing, said means engaging said U-shaped member for longitudinal as well as rocking adjustment thereof. '6. The combination or a reflector having an opening therein, a light mounting adapted to support a light bulb in said opening, said reflector being provided with an aperture, said mounting being provided with a part adapted to have resilient gripping engagement with said aperture for sliding and rocking adjustment of said mounting with respect to the reflector, said part comprising resilient tongues arranged to be placed under stress when engaged in said aperture.

In testimony whereof I aflix my signature.

LLOYD BLACKMORE;

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