US1400227A

US1400227A - Lamp-focusing device

Info

Publication number: US1400227A
Application number: US359950A
Authority: US
Inventors: Judd L Minick
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-02-19
Filing date: 1920-02-19
Publication date: 1921-12-13
Anticipated expiration: 1938-12-13

Description

J. L. MINICK.

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Patented Dec. 13, 192i.

2 SHEETS-SHEET l.

SQ Mhw m m,

NNIINNI J. L. MINICK.

LAMP Focusmc; DEVICE.

APPLICATION FlLED FEB.`19|1920.

2 HEETs-sHEET 2.

UNITE STATES LlE-FOCUSING DEVICE.

iai-.coser i Specification of Letters Eatent.

atented Dec. 13, 1921.

Application led February 19, 1920. Serial No. 359,950.

To all w fiom if may concern.

Be it known that JUDD L. Minion, e citizen of the United States, and a resident of Altoona, in the county of Blair and State of Pennsylvania, have invented certain. new and useful improvements in Lamp-Focusing Devices; and I do hereby declare the tollowing to be a full', clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in lamp focusing devices.

ln the ordinary manufacture of reflectors, lenses, lamps and parts for mounting, there is liable to be imperfections which will interfere with and in tact prevent accurate alinement of the source of light with the center or i'ocal point of the reflector, unless some means be provided for effecting accurate adjustment of the parts after they shall have been assembled, and hence to obtain the highest elliciency, it is essential that accurate adjustment be. made and maintained.

One object of my present invention is to 'provide simple and ellicient means whereby the source oi light (an electric or other type oi lamp) may be accurately adjusted so that the center of the light source shall be set and maintained at the focal point of the rerlector or lens as the case may be.

lilith this and other objects in view, the invention consists in certain novel features oit construction and combinations ot parts as hereinafter set Forth and pointed out in the claims.

ln the accompanying drawings: Figure l is a sectional view, partly in section, showing an embodiment of my invention; Fig, Q is a sectional view on the line ot' Fig. l; Fig. 3 is a front elevation otl the framework and clamping device applied thereto; Fig. l is a side elevation ot the, structure shown in Fig. fl: Fig. 5 is a sectional view oi thc shell ll: Fig. 6 is a view of one ot' the meinbers oi the cylinder l1 Fig. T a` view ol one oil the nieinbersot the eccentric T; llig. 8 is a sectional view ot' the nut 20; Fig. 9 is an end view of the cylinder segment shown iii llig. ll: `Fig. l() is an end view oi the eccentric segment shown in Fig. T. and llig. ll is a diagrammatical view illustrating the method oi securing both vcitical and transverse adliustment ol the light source.

l represents a Jframe or support compris# ing a pedestal 2 having an enlarged upper end 3 providing a curved seat on which the lamp holding and adjusting devices are mounted, and an upright il having an annular upper end portion 5 which serves as slipporting means for a reflector indicated by dotted lines at 6. YWhile l have shown the

parts

4,5 as a convenient means for supporting a reflector, it will be understood that if a lens be employed instead o'f a reflector, or it my innnoved focusing means he used for a motion picture machine, the parts el and 5 would be omitted.

An eccentric sleeve T, viz., a sleeve having an eccentric bore,comprising two or more segments is supported on the curved seat at the upper end ol the pedestal 2, and the eccentric sleeve is provided at one end with a knurlcd annular head l() to facilitate manipiilation oi the saine. Instead or making the sleeve T in separato relatively movable sections, it may be made in a single piece instead so as to provide relatively movable portions. It desired, the two segments composing the eccentric sleeve T may be connected by loosely litting dowels 8 (Figs. 7 and l0) and said sleeve may be made with peripheral grooves l) to receive. lianges 9 at the Lipper enlarged end ot the` pedestal. but these ifeatures of construction may be modified or omitted without departing from the spirit of my invention.

il. cylinder ll is mounted to turn in the eecentric sleeve T and is provided at one end with an annular flange l2 overlying one end ot the sleeve 7: the other end ot said cylinder being made with an annular knurled l ad i3 which occupiesl a position near the liiiui'lcd head l() ol' the eccentric sleeve. rllhis cylinder may be made in separato relatively n'iovable sections or it may be uiade iii a singlo piece and split to provide relatively movable portions.

l'lounted within the cylinder ll. is a shell 'll- (which may be split to provide relatively movable portions) and one end ot' said shell provided with an annular enlargement l5 provided with projections lll at diametrically opposite points and these projections einer longitudinal grooves 1T in the inner wail o'l` the cylinder ll. The cylinder 1l is also provided ncai' one ende-viz. within the annular head 11h-with a circular groove lo which receives an annular flange 19 on a nut 20, the latter entering one end of said cylinder and having a kiiuiled part 2l disposed adjacent to the liniirlcd head 13 of the cylinder. The nut 2O is made with a threaded bore to receive a threaded shank 2:2, 4the latter being rigidly secured to a socket piece 23. The socket piece 23 passes through the split shell 14, andis made rigid therewith by means of a set screw 23 or in any( pher suitable manner. The socket piece may project outwardly beyond the shell 14 and through the annular portion 5 ofthe `tramework, to receive and support a lamp 24.

In the drawings, l have illustrated my improvements as applisable tor use as a locomotive head-light, and have illustrated an incandescent electric lamp as thesource ot light, but it is evident that m v invention is equally well adaptable for use on automobiles or other vehicles and that lamps, other than electric lamps might be employed.

A flexible metallic band Q5 (which may be termed a brake or,clamping band) embracesy the eccentric sleeve 7 between the grooves 9 and is rigidly secured near one end to the enlarged upper end l ol' the pedestal or base 2,,the other end of said band having secured thereto, a threaded rod 26 which passes t'reely through an opening 2T in the pedestal or support- 2 and receives a nut QH. This nut is provided wit-h a partly spherical portion 281! which is seated within a similarly shaped recess Q9 in a boss 29 on the pedestal -or support, and thus the threaded rod 26 is permitted to seek and maintain proper alinement.

.lf the lamp be properlyY made and screwed home in the socket piece, the longitudinal axis of the light Source will `-be caused to coincide withthe line .ir-.vu Fig. 1 which, by properly adjusting the lamp focusing device, will bc made to coincide with the longitudinal axis oi' the reflector.

It' the nut 2() be turned, the shell ll in which the socket piece. 23 is secured, will be moved longitudinally along the axis .1'-.z',- the pills or projections 16 moving in the grooves 17 preventing ittrom rotating about its axis,-and thus longitudinal adjustment oi the source of light may be effected.

The diagram, Fig. ll, indicates a diagrami'natic transverse section through the cylinder vl1 and the eccentric sleeve T, the part :I: being the projection of the axis .1v- .0 oi Fig. l.

1i' the lamp were perfectly made and screwed home in the socket piece 23, the longitudinal axis of the light source would coincide with the longitudinal axis of the reflector and hence vertical and transverse adjustment of the lamp would be unnecessa ry, but lamps, sockets and other parts are not perfectly made and the center of the light source will not usually fall upon the point a,',-hence provision for such adjustira-nts must be made, and this is accomplished by my improvements.

For thepurpose of illustration, let it be.

ysource falls at the point la and that assumed. that when the lamp is screwed home in the socket, the center et the iight is desired 'to so adjust the lamp as to cause the point L to coincide with the point "ig-3." if the cylinder 'll be turned about its axis, the point L will describe a segi'nent terminating at lill if the eccentric sleeve l be turned about its axis, the point M will mark the segment, terminating at if l` l this particular instai1ee,then, all that is necessary to be done in order to cause the point L to coincide with the point af is to tura the cylinder 1l until the point lf coincidesV with `the point MQ and then turn the eccentric sleeve until the point lil coincides with the point an lVhen the lamp shall have been properly adjusted, the l)arts will be clamped with the use of the clampingl band 25 and the adjustment of the lamp will be niaintained. it may be explained that slight tension on the band will cause the eccentric sleeve T to be clamped, while the cylinder ll. shell ll and nut 2O may remain tree to adjust. .kdditional tension on the clamping band Q5 will lock the cylinder l1 in addition 'to the eccentric sleeve l', while turtlier tension on said band will clamp or lock all the parts securely together. The reverse action will take place, when the mit 28 tor the clamping band is unscrewed.

The term relatively movable portions" as applied to the sleeve cylinder 'll and shell ll, is intended to comprehend Kthe making of each or any ol' these members in' separate segments or in making each or any ot said members in a single piece and split or slotted.

`Various changes might be made in the details ot' construction ot' my invention without departing trom the spirit thereol2 or limiting its scope and hence l do not wish to restrictmyself to the precise details herein set t'orth except as specified in the claims.

Having fully described my invention, what .l claim as new and desire to secure by Letterslatent iszl. ln 'tot-using means, the combination with a support. ot a sleeve having an eccent 'ic bore and comprising relatively movable port-ions mounted on said support, a cylindeiF mounted in the eccentric bore ot said sleeve and having relatively movable portions. holder longitudinally movable in said cylinder, a lamp socket secured to said holder, and means 't'or se 4airing the parts in adjusted position.

l2. In focusing means, the combination with a support, of a sleeve having an eccentric bore and having relatively movable parts` revolubly mounted en said support, a cylinder revolubly mounted in 'the eccentric bore o't said sleeve and having relatively movable portions, means for .holding a lam;`4

tric bore, revolubly mounted on saidsupport, said sleeve comprising a plurality of relatively movable portions, a cylinder revoiubly mounted in the eccentric bore of said sleeve, said cylinder comprising a plurality of relatively movable portions, means for hoiding a lamp support in said cylinder, a clamping band secured to said irst-mcn tiened support and embracing said sleeve, and means for tightening and loosening said band.

4:. In iocusing` means, the combination `with a support, of a sleeve having anI eccentric bore, revolubly mounted on said support, a cylinder revolubly mounted in the eccentric bore of said sleeve, a shell longitudinaliy movable in said cylinder, means for preventing rotation of said shell relatively to the cylinder, a lamp support held in said l sheil and provided with a threaded shank, a

nut revolubly connected with said cylinder and threaded on Asaid shank, and means`for holding said sleeve and' cylinder,` in adjusted positior'iE 5. in focusing means, the combination with a support, of a sleeve havingman eccentric bore, revolubly mounted on said support and comprising relatively movable portions, a cylinder revolubly mounted in the bore Yer said sleeve and comprising relatively movable portionsga shell mounted to move iongitudinally in said cylinder and comprisrelatively movable portions, a lamp older entering said shell andproxzided with a shank, means engaging said shank for effecting' longitudinal adjustment of the shell, lamp holder and the lamp carried by the latter, and means for holding the parts in adjusted position.

6. In focusing), means, the combination with a support, oi' a sleeve having an eccentric bore, revolubly mounted on said support and comprisingr relatively movable portions, a cylinder mounted in the eccentric bore of said sleeve and comprising' relatively movable portions, said cylinder having internal longitudinal grooves and an internal circulaigroove, a shell comprisingrelativel)v movableportions. enteringl said cylinder, projections on said shell movable. in the longitudinal grooves in the cylinder, a' nut having an annular flange movable in the circlilal' groove in said cylinder, a lamp holder held in said shell and provided with a shank threaded through said nut. and a clamping band secured to said support, embracingV said sleeve v and adjustably connected with said support.

7. in a focusingv means, thc combination .with a Support provided u'ith a part havingr a partly spherical socket, ot' a sleeve having an eccentric bore, rcvolubly mounted on said support, a cylinder revolubly mounted in the eccentric bore of said sleeve, means for holding a lamp support in said cylinder, a clamping band embracing said sleeve and secured atene end to said first-mentioned support, a threaded rod fixed to the other end of said band and passingr through the socketed part of the Erst-mentioned support, and a nut on said rod having a partly spherical part seated in said partly spherical socket.

In testimony whereof', I have signed this Especification in the presence oi two subscrib ing Witnesses.

JUDD L. MNICK. lVitnesses JAMns T. HANLoN, S. M. VIELE.