US1426857A

US1426857A - Focusing device

Info

Publication number: US1426857A
Application number: US430958A
Authority: US
Inventors: Charles E Godley
Original assignee: Edmunds & Jones Corp
Current assignee: Edmunds & Jones Corp
Priority date: 1920-12-15
Filing date: 1920-12-15
Publication date: 1922-08-22
Anticipated expiration: 1939-08-22

Description

C. E. GODLEY.

FOCUSING DEVICE.

APPLICATION m2!) mamas. 1920.

INVENTOR.

CHARLES E. GDDLEY, Q1 FJETEWET, HIGHIQAN, ASSIGWQE T0 117336311 2333 6r, .I'QZEEES CQRIPORATIGN, 014 DETROIT, MICHIGAN, A CDEPOBATEQN Ole NEW YORK.

Specification 0? Letters Yatcnt.

Aug. 22, 12922.

Application filed December 15, 192%. Eerial No. 430,953.

lhis invention relates to electric headlights and spotlights for motor vehicles,

search lights for motor boats-and in general to lamps provided with projectors, and

its object is to provide means for so mount ing the light bulbs that the incandescent points of the bulbs may be brought to the focal points of the reflectors b moving these incandescent points both longitudinally or the focal axis of the reflector and transversely thereto.

Few of the incandescent light bulbs for automobile head lamps are correct or .1111 form inconstruction for most of them have the light points of their filaments at one side of the central lines. No particular standard seems to be followed for the distance of the light point from the end of the base for the bulb. It is necessary therefore that means he provided for so sup porting the light bulbs that they can he moved both longitudinally of the axis ofv the reflector and transversely thereto to obtain good results.

The invention shown in the accompany ing drawing and set forth in the following claims is adapted to accomplish this purpose.

lIn the accompanying drawing, Fig. 1 is a central longitudinal section of a headlight provided With my improved focusing device. Fig. 2 is a similar section of the focusing device for a headlight having a flattened rear end. Fig. 3 is an elevationv of a fastening clip. Fig. 4 is an elevation of a collar.

In Fig. 1 the cup shaped lamp body 1 a spherical central portion 2 provided with a central aperture 3 to receive the internally threaded hub t on the bearing plate 5. This plate may have its edge turned out to con stitute a flange 6 so that it maybe firmly grasped to slide the plate around. Within the body 1 is a reflector 7 having a central aperture 13 and the center of the sphericalportion 2 ofthe body is'prefcrably in the middle of this central aperture in the reflector.

A connector sleeve t isifitmed with,

relative to the reflectors threads 9 which fit the internally threaded hub 4: and which sleeve may be turned in this hub by means of the connector plug 10' and its pins 11 ivhich entend'into the bayonet slots 12 in this sleeve in the usual mannor. 1%. light bulb 14 has a base 15 provided. with pins 16 which enter the usual. slots 17 in this sleeve. This construction is clearly shown in detail by the Knauii patent number 1,059,617, dated April 22, 1913, although any other type of connector for either sing e or double contact bulbs and plugs may be employed if desired. A collar 19 having a spherical face'bears against the interior of the-spherical portion '2' or". the body 1 under pressure of the spring 20, and together with the plate 5, hold the focusing device in position.- A second and mainly fiat collar 18 is clip 22 which straddles the sleeve 8 and is seated in the circumferential groove 21 therein. The collar 18 has a notch 31 to receive the rcarwardly extending linger 23 on this clip and thus holds the clip in its groove. The clip cannot be removed until the collar 18 has been moved hack sufiiciently to tree this pin.

As stated before. the incandescent point Q5 of the filament of the light hulb 14 isnot always in the central line of the base ofthe bulb. in order to bring the incandescent point into the axis of the reflector. tlie 'plate 5 is moved around on the spherical portion 2 of the lamp body to move the incandescent point to the axis of the reflector and the con-. nector sleeve 8 is turned in or out to move the incandescent point to the focus of the reflector. As the center of curvature of the part 2 of the body is at the center of the opening 13 in the reflector, this opening need be but little greater than the diameter oil-the connector tube 8.

To remove the parts, the light bulb and reflector are taken out of the body 1 and the collar 18 is pressed back against the spring until the finger 23 on the clip 22 is released, when the clip may he slipped up out of its groove. The

collars

18 and 19 and the spring 20 between them may nowbe slipped ofi the sleeve 8 and this sleeve and the plate 5 taken out togethe through the opening 3.

In the construction. shown in Fig. 2, the sleeve 8 has the threads 9 and the slots 12 and 17 to receive the pins 11 on the conned tor plug 10 and the pins 16 on the base 15 of the light bulb. lit also a circumfer finger 23 extends '1 Elite lateral movement of the hub 4c to so firm y press the collarlll ential groove 21 to receive 18 and is'thereby held in its groove. The central portion 2 of the lamp body isflat and against it bear the flat bearing plate 5 and the fiat washer 19 the central portion 2*, of the lamp be y per direction and the openingQii' is of. sufi'icientjsize to permit this movement. The sprin 20 is again of sufiicient stillness against the interior of the body as to prevent any displacementof the connector except under considerable pressure on the flange 6 In this case again, the sleeve and the-light'bnlb I may be moved longitudinally of the axis of flector to the reflector and transversely {thereto to bring the incandescent portion of the files ment of the bulb; into the focus cfthe reproduce a concentrated beam e13 light or toniove it away from such focal point inprd er to obtain a difi'used illumination; rune second case the sleeve '8 will always be parallel "to the axis of the reflector While'inthe first case; the central line of the sleeve .w'ilialwiays be a radius of the ping the'metal of the spherical part 2 of the reflector. In the first case, the disk 5 must be moved in a direction opposite ,o that desired for the-filament,

while in the second case the plate 5 is moved in the same direction.

The detailsand proportions of the various parts of this focusing device may all be changed by those skilled in the art without departing from the s as set forth in the fol claim 1- '1. In a headlight, the combination of a body having an aperture, a connector sleeve extending into the body through said aperture, and means attached to said sleeve and pp irit of my invention owing clam s tion, the diameter of the aperture being suflicient to permit lateral movement ofthe sleeve therein, said gripping means comprismg a plate fitting against the body around the aperture and attached to the sleeve, a

collar movablelongitudinally of the, sleeve 1 and means including a spring to folce the collar and plate toward each other with the metal of the body between them.

2. In a headlight, the combination of a body having an aperture, a connector sleeve 1 extending into the body'thrcugh said aperture, a light bulb mounted in said sleeve and means attached to said sleeve and gripbody around the aperture to hold the sleeve in desired position, the dlameter of the aperture being su-llicient to permit lateral movement of the sleeve the-rein, said gripping means comprising a plate fitting against the outside of the body and an inte nefly thre de ub extending the clip 22 whose into the vbody through into a notch 31 in the collar The openin 3 in inany. in the reflector. g

and means attachedto said sleeve and the metal. of the body around the aperture to hold the sleeve in desired posih the aperture, said sleeve being screw threaded in the hub, a collar slidable on thegh'ub within saidbody, and means to'pressthe collar toward the-plate. j r

saline 'hcadlight the combination of a body having an aperture, a connector sleeve ext-endin into the body throughsaid apertore," a I ight bulb mounted in said .sleeve see ping the metal oic' the body around the a or ture'to hold the sleeve in desired position, the diameter of the aperture being sufilcient to permit lateral movement of the sleeve therein, said gripping means comprising a platefitting-aga'nst the outside of the body and an internally threaded hub extendin into the body through the aperture, sai sleeve. being screw threaded in-the hub, a collar slidable on the hub within said body, and means including spring motmtedjlop sail leave to press the collar towardFhd p ate." p 1 4:. in a headlight, the combination of ef' cup-shaped body and a reflector th'ereimf both having apertures central with the axis 3 of the reflector, a connector sleeve extendin 7 through the apertures, a lamp bulb mounted in the-inner end of said sleeve, a'plate on. the outside of the body and attached to at" the sleeve, a collar on the inside of the body slidable relative to the sleeve, a second collar on the sleeve forward of the first, a spring." between-said col lars to press the slidab'le collar toward'lefh the plate to grip the metal ofthe body be tween these, and means to prevent the for ward collar from sliding forward, the span tures in the body and the reflector" being suiliciently larger than the-sleeve to permit lateral movement thereof I 5. In. a headlight, the combination 0% a cup-shaped body and; a reflector therein, 0th having aperturescentral with the axis of the reflector, a connector sleeve extending through the apertures, a plate on the -outside of the body and'attached to the sleeve, a collar on theinside of the body movable longitudinally of the sleeve, a second colar on the sleeve forward of the first, a sprin between said collars to press the slidabde collar toward the plate to grip the metal of the body between them, and means to prevent the forward collar from sliding lie *orward, the apertures in the body and the reflector being sufliciently larger, than the. sleeve to, permit lateral movement thereotl said collar retaining means comprising 5i clip mounted inva circumferential groove the sleeve and having ing finger, said forward collar av a notch to receive the pin to hold the clip in i said groove. 6. In 'a headlight, the combination'oi' a cnpshaped body and a refle t Q; thesis, 13369 iee a rearwardl extend- (12a meme? both having apertures-central with the axis of the reflector, the body surrounding the aperture therein being fiat and at substantielly right angles to the axis of the rel fiector, a connector sleeve extending through said apertures, 21- fiat plate fittingthe outside of the'fiat end of the bmly and attached t0 said connector sleeve, a collar slidable lohgitud inelly of said sleeve, and means inems. e. GODLEY.