US1994669A - Lamp - Google Patents

Description

March 19, 1935.

c. scHAFFNl-:R 1,994,669

LAMP

Filed Jan. 24, 1954 n f/l 4297 i Patented Mar. 19, 1935 UNITED 4s'rATifl3s PATENT- OFFICEl Charles Schaffner, Chicago, Ill.

:Application Januaryzi, 1934, serial lvfnoaois` 6 claims. v`(C1.l 24o-s1) 1 The .present invention relates to lamps-and is particularly concerned with lighting fixtures of the=type adapted to be usedby machine tool operators where it is `necessary to have a brilliant source of light applied directly to the work withput any glare in the eyes of the operator.

l. One of the objects of the invention is the provision of an. improved lighting fixture for machine tool operatorslin which a shaded lamp is adapted to be adjusted and secured inany ofa plurality of rotative positions at such a point that the light is applied directly to the machine tool work. p `Another object ofthe invention is the provision of animproved lamp or lighting fixture of the clasps described which is provided with an adjust- ,able stand and improvedvertical and horizontal xtures'for facilitating the application of the light `,source `to the work. `Another object of the invention is ythe provision `of an improved lighting 1xture of the class described in which the lamp may be very readily removed to be. used as a trouble lamp or for Aapplication of light toother parts of the work apartrfrom the `lixture.

(Another object of the invention is the provision ofan improved adjustable structure whereby the lamp supporting armis supported .onfaz standard, in-,such a way that the armrnay befrotated or moved toany -of amultiplicity of diiferentvertical adjustments.` l

. Another object of the invention is theprovision of:animprovedzstructure of universal support for t-heg-lamp permittingthe horizontal movementv of the lamp and its securement in any of a plurality of rotative positions abouta vertical axis `and-also permittinglthe rotation ofth'e lamp abolita horizontal axis so that the `lamp has a substantial-1y universal adjustment and may be l.-a-pplied to the work at any point and at any angle.

Other .objects and advantagesv of 'the invention be: apparent from the following description and the accompanyingdrawing,-inwhich similar characters Yof reference indicate similar parts throughoutther several views.` f

Referring to the singlesheet of drawing,

.Fig. l-isa-sidefelevationalrview of a light fixture-:constructed according to the present invention.; p Fig, V2 is 'a horizontalsectionalview of the `structure ofi-.the securing devices for adjustably supporting the lampfarm on-the standard, taken onftheplane'of the line 2 2- of Fig. 1, looking i .inthe direction ofthe arrows;

Fig. 3ds;alvertical-section taken on the plane Atheshoulders beingl provided for preventing escape of the balls when'thes'leeve is rem'oveflfrom 21, which resiliently engagesvthe balls 27.

of the line 3=3 of Fig.v1, showing details of structure of the adjustable support for thev lamp which permits removal of the lamp for use as a trouble lamp or adjustment of the lamp abouta horizontal or a vertical axis. y 4-4``,5 A Fig. 4 is a fragmentary -top plan view of the adjustable support for the lamp of Fig. 3, taken on the plane of the line 4-4 of Fig. 1',A looking in the direction of the arrows;

Referring to Fig. 1, the lighting xtureshown `therein is indicated in its entirety by the numeral 10, and preferably comprises a-'base 11, provided with a standard 12 which carries the adjustable lampsupporting arm 13. Thebase 11 may consist of a cast metal member which is provided with l a socket'14 adapted to xedly receive the lower end of thestandard 12, which may consist'of a metallic pipe or shaft having a drive fitf inthe socketll. The base 11 maybe provided with a transverse aperture 15 for receiving a lag screw 16 -to secure the base to the floor, if desired.

The standard 12 preferably extends to. a height well above the machine work sov that the lamp may beadjusted to anydesired height. Slidablyy supported upon the standard l2 for movement in a vertical direction is the lamp ysupporting arm `13, which is mounted upon a metallic sleeve I7.

Sleeve 17 is a slide t with the shaft 1'2 and is preferably vformed with a pair of collars 18 and 19, with a groove l20` between the collars. The 1, groove 20 and collars 18,. 19 serve to support and maintain the alignment of an arcuate' spring 21 of substantiallyrectangular shape in elevation and provided with' centrally located apertureV 22.

The sleeve 20 is provided with a threaded bore .23 `adapted toreceive one endv o-f a threaded stud 24 upon which the spring` 2li is mounted.v The aperture 22 is of sufficient size so that spring 211 may move inward 'andoutward on the threaded Stud 24. l 1 .40

On each side of the threaded bore 23 the sleeve k1'7 is provided witha pair of ball sockets 25 comprisin'gV cylindrical bores which `terminate at the tapered shoulders 26 vonthe inside of the sleeve,

the standard'12`. Balls 27'are of slightlylgreater diameter than the thickness of the sleeve 17 at fthe groove 20so that theba'lls project outside the sleeve into engagement with spring 21 `which i urges the balls into engagement withfthe' standard 12. i

A n'ut28vand lock` nut 29 on the threadedstud 24 are'used to place tension on the arcuate spring 55 The sleeve 17 is thus provided with a friction device for securing the sleeve in any predetermined vertical position, and it is only necessary to move the sleeve upward and downward, as desired, and it Will be retained in the place to which it is adjusted. The amount of friction may be regulated by means of the nuts 28 and 29.

The collars 18 and 19 are preferably provided with the bores 3Q located diametrically opposite the bore 23 for receiving the reduced ends 31 o-f a pair of rods 32, v33. Bores 31 are enlarged or countersunk at 32 inside the sleeve 17 so that the reduced ends 31 of the rods 32, 33 may be riveted over. The rod is thus secured to the sleeve 17 by the riveted end of the rod and by'means of engagement of the annular shoulder34 outside of the collars 18 and 19, and the rods 32,33 extend laterally of the sleeve 17 and parallel to each other.

The opposite ends of Athe rods 32, 33 are reduced and providedwith ends 35 for receiving' a crosshead 36. C'rosshead 36 has a pair of bores forreceiving the reduced threaded ends 35 and the crosshead is confined'between the annular shoulder 3.7 and the nut 38 on each rod. Cross- 'head 36 is also provided Vwith a centrally located horizontally extending bore 39 for slidably receiving rod 40.

Rod 40 is providedwith a reduced end 41 which is xedly secured in albore 42 in a movable crosshead 43 by riveting overthe end 44 of therod 40. yMovable crosshead 43fis confined between the riveted end 44 and theannular shoulder 45. The movable crosshead 43 is also provided with apair of bores 46 of suitable size and location to slidably receive the rods 32' and 33. The rods 32, 33 and `40 are held in parallel and sliding relation to each other. N

'In effect', the arm 13 is adjustable longitudinally for extending'or' retracting the lamp. The arm 40 is preferably provided at its oute'r end :with a flat plate or' disc 47v having a centrally located cylindrical bore 48.

Another metallic disc 49 of similar size is provided "with a threaded bore 50, into which is threaded the reduced vertical end 51 of afcylindrical studv 52 having an annular shoulder 53. The cylindrical stud 52 rotatesin the bore 48 of `the plate 47 and is threaded aty its lower end 54 for receiving a knurled nut 55.

The helical coil spring 56 is compressed between the nut and the lower plates 47 and 49r are brought into-frictional engagement with each other and retained in any predetermined adjusted Arotative position.

The upper plate 49 is preferably provided. with a pair of apertures 57, each of which is countersunkj at the lower end`58 Vso thatfa pair of metal- `Vlic'pins 59may have their reduced'ends` 60 secured in the bore 57 by riveting over at 61.

Thepins 59 each have annular shoulders 62 engagingthe upper side of plate 49, and the pins are spaced from each other at equal distances from the center' of the plate l49.

4The upper ends of the pins 59 are'preferably rounded as at 63v so as to facilitate the insertion of the pins into a groove 64 in the lamp supportcutting the insulation of conductors 67. At its opposite end the member 65 is provided witha reduced cylindrical threaded portion 70, upon which may be threaded the usual female threaded part 71 of a lamp socket 72 of conventional shape.

The lamp socket supports the conventional type of shade 73. In the socket is an incandescent bulb 74, which may be of the Mazda type or of some special type when desired. y

-A set screw -75 threaded into a bore engages the threaded hub and secures the socket 72 in predetermined position.

At its central part the member 65 is provided with a substantially cylindrical enlargement havradially extending flanges 76, 77. 'Ihe flanges 76, 77 are provided with frusto-conical surfaces 78, 79 on the outside and with flat surfaces 80 on the inside of a groove 64 of a size adapted to receive the pins' 59 and the middle cylindrical portion 81 of the-memberf'fis spaced sufficiently to be located 'between theipi'ns 59 i,

The f1t of the pins 59 inthe groove 64 should'be such that the lamp will be retained in anyl rotative position in which it is placed, or thpins may resilientlyV engage the cylindrical part Vlf'to guard against movement. Y' 'f''f" It will thus be observed thatfthe lampv 74lwith its shade 73 may'move about a horizontalaxis, the yaxis of the stud 52, and it is retained ifrany adjusted position by means of the frictionalen- 'gagement of the plates 47 49. -The lamp may also 'be rotated aboutfa Vhorizontal axis', the ax'is'of Vtlie affording specialillumination, n

substantially rec-A tangular shape'irifsection. The groove-64is of f ing agroove, or it may be described as a pair of socket 72, by means ofA the'felngagement Yofthfe pins 59 in the groove 64. yThelamp-maybe'pulled f out -or shoved back byfmeajnsv of the extensible feature `of the arm-"13, andthe lamp may be lifted to anyl desired position on the standard 12s that it is locatedimmediatelyfabove thework witl'igthe 'shade below the eyes of the operator. v e ff Y If desiredthe llamp \`may be" removed from Aa supporting' fixture by merely lifting the member, 65 out froml between the pins 59, -afterv'vhich/the used asa trouble lampil' lamp may be "moved to any desired position The lamp'conductors 67, Agenerally twol in num'- Yber, andpreferably 'covered-with vinsulatio'r'isuch f as rubber, preferably terminatev inthey conventionalwall'plugl 82, having the usual pair of prongs. The tension of the springs 2-1 and56V may be changed orl adjusted so thatas the partsfwe'ar the tension' may be increased' and the yfixture made toretain its adjustmentas desired. n While I have illustrated a preferred embodiment of my invention, many modifications may be made Vwithout departing from the spirit -of 'the invention, andv I do not wish to be limited tothe s precise details of construction set forth, butgdesire toavail myself of all changesuwith-in the scope ofthe appended claims.

Having thus described my invention, what 'I claim as new and desire to secure by ent of the United States, is:

1.I n an operating lamp, the combination of a standardvcomprising a Vbase and a vertically extending shaft with a sleeve slidably mountedv on said shaft for adjustment in a'fvertical direction, said sleeve having a pairvof annular shoulders separated by a groove, a threaded stud mounted in Asaid groove and extending radially f 'rornfsaid sleeve, apertures onboth sides o f said stud through ewes-.1facthe sleeve and located in said groove, balls in said "N5 apertures, and resilient means mounted on said stud for urging said balls into engagement with said shaft.

2,. In an operating lamp, the combination of a standard comprising a base and a vertically extending shaft with a sleeve slidably mounted on said shaft for adjustment in a vertical direction, said sleeve vhaving a pair of annular shoulders separated by a groove, a threaded stud mounted in said groove and extending radially from said sleeve, apertures on both sides of said stud through the sleeve and located in said groove, balls in said apertures, resilient means mounted on said stud for urging said balls into engagement with said shaft, comprising an arcuate spring member slidably mounted on said stud and guided by said annular shoulders, said stud having threaded means for engaging said spring.

3. In an operating lamp, the combination of a standard comprising a base and a vertically extending shaft with a sleeve slidably mounted on said shaft for adjustment in a vertical direction, said sleeve having a pair of annular shoulders separated by a groove, a threaded stud mounted in said groove and extending radially from said sleeve, apertures on both sides of said stud through the sleeve and located in said groove, balls in said apertures, a lamp supporting arm carried by said sleeve, said lamp supporting arm having means for extension of said arm, a lamp carried by the end of said arm, and a substantially universal joint connectionbetween said lamp and said arm. s

4. In an operating lamp, the combination of a standard comprising a base and a vertically extending shaft with `a laterally extending lamp supporting arm, said arm having a disc carried by its outer end, a second disc in frictional en.gage ment with the first-mentioned disc, said second disc having a stud passing through an aperture in the vfirst-mentioned disc, resilient means for drawing said discs 'into frictional engagement with each other, and a lamp carried by said second disc and adapted to be rotated with the second disc and held in any of a plurality of predetermined positions, said second disc having'a pair of upwardly extending pins, and said lamp being carried by a metal sleeve having radially extending shoulders for engaging on both sides of said pins, whereby said lamp may be rotatably and removably supported by said sleeve between said pins. v

5. In an operating lamp, the combination of a standard comprising a base and a vertically ex` ing a' guide formed therein, a third rod slidably u mounted in said guide and having a cross head slidably engaging said first-mentioned arms.

6. In an operating lamp, the combination of a standard comprising a base and a vertically eX- tending shaft with a sleeve slidably mounted on said shaft for adjustment in a vertical direction, said sleeve having a pair of annular shoulders separated by a groove, a threaded stud mounted in said groove and extending radially from said sleeve, apertures on both sides of said stud through the sleeve and located in said groove,

`balls in said apertures, resilient means mounted on said stud forurging said ball-s into engagement with said shaft, and a lamp supporting arm carried by said sleeve comprising a pair of laterally extending rods, a cross-head carried by said rods and having a guide formed therein, a third rod slidably mounted in said guide and having a cross head slidably engaging said first-mentioned arms, a disc carried by the end of said third rod, a

ksecond disc rotatably mounted on said first-mentioned disc, a pair of upwardly projecting pins carried by said second disc, and a lamp having a grooved hub for receiving said pins, rotatably and removably mounted between said pins.v

CHARLES SCHAFFNER.

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