US 2472624 A
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June 7, 1949. SCHWARTZ 2,472,624
WORK LAMP SUPPORT Filed July 10, 3.943 3 Sheets-Sheet 1 25 fl 2 INVENTOR. 16) F H I 16 jVaZ/zan Karin! 'clzu/ar/z U I 14 55 y I 56 I 1777'0RNEY J1me 1949- N. R. SCHWARTZ 2,472,524
WORK LAMP SUPPORT Filed July 10, 1943 3 Sheets-Sheet 2 IN VEN TOR.
June 7, 1949. N. R. SCHWARTZ 2,472,624
WORK LAMP SUPPORT Filed July 10, 1943 3 Sheets-Sheet 3 0 I 7e 78 S 75 "i 74 75? g, 7a [I g 70 V 71 M 72 63 g 59 i $5 67 05 51 INVENTOR.
B %AWEY Patented June 7, 1949 UNITED STATES- PATENT ornce WORKLAMP SUPPORT Application July 10, 1943, Serial.No.. 494,433
This invention relates toindustrial or work lamps such as are used in factories, machine shopswork benches, draftsmans desk and in fact wherever directive lighting will aid in better or more. rapid productionof work.
It is the principal object of the present inven-- tion to provide. a work lamp comprising an arm mounted at one. end on abaseand having a lamp secured at its. other end, both attachments being so made, that the. arm may be turned: axially substantially one complete revolution in either direction,
Another feature. of. this. invention lies in the provision of aworklamp of this. character where-- in the arm. may be turned at its base angularly up to 90 degrees relative to its normal axis.
And it is. yet another purpose of this invention to provide a work lamp the lamp or shade retaining end of which maybe rotated axially substantially one complete revolution in either direction.
Another advantage of. this. invention resides in the provision of means in association with a worklamp of this character, whereby the-lamp or shade. retaining end may be angularly' adjusted up to. 9.0. degrees of its normal axis.
And. a still. further aim of this invention resides in. the provision of means associated with a work lamp of this character, wherein any or all ofthese. adjustmentsqmay selectively be-made, thus affording an almost unlimited variety of angular adjustments, permitting. the casting of light rays from practically every conceivable angle.
And yet another aim of this invention lies in the provision ofmeans to limit the rotative: movement of the lamp at thev base and at the: shaderretaining end to slightly'lessthanonecomplete revolution in either direction, thus preventing the twisting and eventual breaking of the electric cable which would result if the limiting means were not present.
A further aim of this invention resides in the provision ofa work lamp which may be adjusted.
angularly or axially without the necessity of.
adjusting screws or wing nuts, the adjustment.
being made merely by turning thearm. axially or angularly or both, and. by turning the shade retaining end angularly or axially or both; and. which is further provided; with means. for; automatically retaining the lamp inv any ofits adjusted positions.
Another aim of this invention. lies inthe provision of; awork: lamp of. this. character, whereinthe electric cable is entirely concealed within the.- device, thus preventing. damage thereto.
And a further purpose of thisinvention resides. in the provision of a work lamp of. this character. so constructed, that no oil or other foreign matter can enter any of the working parts thereof;
plished by the novel construction, combination andarrangement of parts, hereinafter described;
and illustrated in the accompanying drawing,
forming. a material component of this disclosure and in which:
Figure 1' is an assembly view of a work lamp constructed in. accordance with the present in vention.
Figure 2 is a cross-sectional view, the section. being taken; on line 22 of Figure 1.
Figure 3. is another cross-section of the device,
the-section being taken online 3-3 of Figure. 2.]
Figure 4 is a bottom view of the. base of the lamp..
Figure 5 is a sectional view of the upper or lamp retaining end of the device, drawn to an enlarged scale.
Figure 6 isa modifiedform of swivel ball; i1- lustrated. in a sectional view.
Referring in greater detail to the accompanying drawings, the numeral 10. designates in general a work lamp constructed in accordance with the present invention,. comprising broadly a base I4, an arm l2 and an upper or lamp retaining end l3.
Referring. now in greater detail to. the several basic" parts of. the lamp, the base M comprises, as is here'ill'ustrated, a circular, hollow cylindrical base'or footmember l4 having a horizontal upper surface 15' raised at its center. to form a neck portion i6. Neck portion It is provided with, a circular bore I'T; the horizontal surface I5 hasv a plurality of openings l8 thereing for the passage of screws or other desirable retaining means therethrough, as indicated at l5; and the cylindrical. portion. [4. of the. base is provided with; a.
circular opening. therethrough,. as at 20 for. a purpcseto be presently described.
a swivel unit retained therein. This swivel unit comprises a hollow housing cast of steel or any other desirable material, said housing, identified by the numeral 25, having a. cylindrical outer surface merging at its top into a rounded upper portion 26 of spherical contour.
Extending from the top to points therebelow, at opposite sides thereof are two substantially rectangular cut-outs 21-28, extending downwardly an equal distance as is illustrated in the drawing.
At its lower end, housing 25 is turned outwardly throughout its periphery to form a flared portion 29. At its upper rounded portion, in the interior thereof and intermediate the cut-outs 21-28, the housing has cast integrally therewith two flats 30-3l, one of said flats having a narrow, downreaching extension 32, substantially rectangular in cross-section, the purpose of which will be presently made clear.
In the upper. rounded portion of housing 25 is a swivel member 33, substantially spherical in contour and of hollow interior, having two substantially flat sides 34-35. its upper end having preferably formed integrall therewith a nipple 36 provided with internal threads 31, said nipple extending upwardly beyond the housing. The diameter of nipple 36 is equal to the width of cutouts 21-28 in which it is adapted to be entered. Centrally near their upper ends, flat sides 34-35 each have a small opening for the passage of pins 39 or other retaining means therethrough, said openings extending through the sides and through nipple 36.
Swivel member 33 seats on a concavely shaped washer 40, circular in cross-section, and having a substantially oval opening 4| in its center. At its outer periphery, washer 4D is provided with a substantially rectangular recess 42 in which extension 32 is adapted to engage to prevent washer 40 from rotating in the housing.
Swivel member 33 is urged upwardly within the housing by a coiled compression spring 43, seating on washer 44, circular in cross section and provided centrally thereof with a circular opening. Washer 44, at opposite points near its outer periphery is provided with a relatively small opening and a relatively larger opening, both extending vertically through said washer, the smaller opening adapted to receive lug 45 and the larger opening adapted to receive lug 46.
Friction washer 41, of smaller diameter than the diameter of washer 44 is positioned between washer 44 and a larger closure washer 48, the fibre washer being circular in cross-section and being provided centrally thereof, with a circular opening extending vertically through said washer, washer 48 also being provided with a circular opening, all three central openings being of equal diameter. A grommet or eyelet 49 joins the three washers at their central openings, both for greater ease in assembling the device and to ground the device thereby. Along its outer edge, washer 48 is provided with a plurality of small cut-outs 50 for the passage of screws or other means therethrough and in corresponding openings in the interior of base member I4 whereby washer 48 is secured to the base, and the larger cut-outs to permit screws or other fastening means passing through opening Hi to clear the washer. Foot member I4 is provided with an opening 54 through which passes a grommet 55 and, in order to prevent excessive strain upon cable 56, a strain relief 5'l is employed in the most advantageous position.
Arm l2, provided with external threads at its lower end is screwed into nipple 36 which has internal threads 31, and pin 39 is passed through the opening in swivel member 33 provided for that purpose so as to secure arm I2 to the nipple, hence to the swivel member.
Arm l2 may be of any desired material and may be formed in any desired shape. It is here illustrated as being substantially vertical in its normal position, and having a substantially U- shaped upper end, but the curve may be greater or less than here illustrated, or need not be present at all.
At its upper end, arm l2 has a lamp-retaining swivel unit attached thereto, the swivel unit being constructed in the following manner:
A thin-walled metallic housing 6!), forming the outer body of the unit, is of a hollow cylindrical nature, merging at its top into a rounded upper surface of spherical nature, as at 6|. At one side, housing 60 is provided with a recess, extending from the top to a point therebelow, as is shown by the numeral 62. Housing 60 may be provided with flats similar to flats 30-3] shown in Figure 2 of the drawing and for the same purpose.
In the upper, rounded portion of housing 60 is a swivel member 63 having a central vertical bore extending vertically therethrough. Swivel member 63 has two substantially flat sides, such as are indicated at 34-35 of Figure 2. Swivel member 63 is completely enclosed in housing 60, and has entered in its vertical bore a conductor comprising an upper portion or nipple 64 having internal threads 65 and provided near its upper edge with a circular opening for the passage of a set screw 66 or other fastening means therethrough. Extending vertically throughout nipple 64 is a bore, which is reduced at its inner end portion to form a shoulder 61. Said conductor further comprises a sleeve member 69, which enters the central bore of said nipple 64, the upper end of said sleeve member being formed with a head 68 which seats on shoulder 61. Sleeve member 69 is also provided with a central vertical bore. The lower end of sleeve member 69 is flared as at 70 to form a seat for washer 1| upon which rests a coiled compression spring 12 to retain the conductor in frictional engagement in the swivel member. At its base, swivel member 63 is provided, at opposite sides with two substantially rectangular cut-outs 13 whose purpose will presently be made known.
Swivel member 63 seats upon a concavely curved fibre washer 14, which is urged upwardly in housing 60 by a coiled compression spring 15 seated upon a washer comprising two substantially thin discs, the upper one of which, 17, is made of fibre or any other insulating material, and the lower or strengthening disc 16 made of steel or any other suitable material. Both discs are provided with a circular opening in their center, where they are joined by an eyelet 18 made of any desirable tubing to form a unit. Washer 1| is also formed with a circular opening in its center, so that cable 19, leading to the bulb may pass through the conductor, the several washers and springs. In order to retain the several members hereabove described in their respective operating positions within housing 60, the said housing is knurled throughout its periphery, as at 80, washer Tl seating on the indentation thus created. Below the knurled portion 80, housing 60 is provided with a plurality of inreaching teeth 8| for engagement with one end of a conventional cylindrical metallic sleeve member 82 having a substantially U-shaped cut-out 83, extending from the other end of sleeve member 82 to a point thereabove to accommodate the knob 84 of a conventional switch which is part of a porcelain socket 85 having a terminal 86 for one of the wires of cable 19, the other terminal'being indicated at 86'. Between socket 85 and sleeve 82 there may be inserted a paper-shell sleeve 82' of standard construction, having a U-shaped cutout identical with cut-out 83.
At its lower end, sleeve member 82 is provided with external threads for engagement with internal threads of a conventional lamp shade 87, and a conventional incandescent light bulb 88 is screwed into socket 85 in a conventional manner.
In order to prevent the disengagement of sleeve member 82 from socket 85, socket 85 at the point of knob 84 is provided with a flat, substantially U-shaped fibre inlay 89, the inlay having a recess substantially midway the thickness of member 89 extending at the outer edge thereof, in which the edges of sleeve member 82 will engage at 83.
Excessive strain upon cable 19 may be avoided by placing a strain relief at the most advantageous places, such as at 90, 9| and 92.
The operation of the work lamp here described and illustrated will be understood from the several views of the drawing and it will be clear that the lamp illustrated in Figure 1 can be turned at the base rotatively until lugs 45 and 48 abut, at which point the rotative movement in that direction will obviously be stopped. A similar condition prevails at the shade retaining end of the lamp.
Many modifications of the device are apparent, and many more will be apparent during the use of the device. The means illustrated in Figure 5 for preventing the disengagement of the lamp socket from its sleeve can be modified by the use of a separate U-shaped inlay, not associated with the socket, which otherwise may be constructed as the one illustrated in the drawing.
There has thus been illustrated and described a practical and highly efiicient work lamp, but it is to be understood that the disclosure here presented is to be regarded as illustrative and descriptive of the best known embodiment of the invention, and not as restrictive or limitative to the exact details shown, and applicant reserves the right to make such changes in the construction of the device as may come within the scope of the appended claims without departure from the spirit and scope of the present invention.
Having thus described the invention, what is claimed as new and desired to secure by Letters Patent, is:
1. In a lamp base comprising a hollow base, a cylindrical housing, a spherical member therein and a closure washer for the base, said spherical member seated on a washer, a slot in said washer, means integral with said housing and enterable in said slot preventing said washer from rotating, and means cooperating between said closure washer and said housing limiting the rotative movement of said housing.
2. In a lamp base comprising a hollow base, a cylindrical housing, a spherical member therein and a closure washer for the base, a washer, said spherical member seated thereon, said washer provided with a slot, a downwardly pointed finger integral with said housing, said finger enterable in said slot, and means extending upwardly from said closure (washer and downwardly from said housing whereby the rotative movement of said housing is limited.
NATHAN RODNEY SCHWARTZ.
REFERENCES CITED The following referenlces are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date Re. 17,845 Bosworth Oct. 28, 1930 960,723 Smith June 7, 1910 1,166,752 Finizio Jan. 4, 1916 1,693,925 Holt Dec. 4, 1928 1,736,208 McRea Nov. 19, 1929 1,893,108 Shannon Jan. 3, 1933 1,963,278 Pieper June 19, 1934 2,041,847 Marchand 1 May 26, 1936 2,255,262 MacFadden Sept. 9, 1941 2,257,866 Talbot et al. Oct. 7, 1941 2,352,806 Schwartz July 4, 1944 FOREIGN PATENTS Number Country Date 254,972 Great Britain 1926 361,689 Germany 1922