US1611903A

US1611903A - Adjustable lamp support

Info

Publication number: US1611903A
Application number: US518543A
Authority: US
Inventors: Gelb Joseph
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-11-29
Filing date: 1921-11-29
Publication date: 1926-12-28
Anticipated expiration: 1943-12-28

Description

1,611,903 J. GELB ADJUSTABLE LAMP SUPPORT Filed Nov. 29, 1921 4 Sheets-Sheet 1 f 3 m i w 0 /6 1 M Q 7 a 4 Z 5../ J o 3 W 2 W 6 w M: 2 a 7 m WW b m avwmtoz Jose h 6119 @tbovvw p G $3 LiA Dec. 28 1926.

J. GELB Dec. 28 1926.

ADJUSTABLE LAMB SUPPORT Filed Nov. 29. 1921 4 Sheets-Sheet 2 0 3 MM 7 T 0 a M W 1, 5 w

Dec. 28 1926.

J. GELB ADJUSTABLE LAMP SUPPORT Filed Nov. 29. 1921 4 Sheets-Sheei 5 amvemtoz Jme h 58% @3 'GLOL alt wa ve Dec. 28 1926.

J. GELB ADJUSTABLE LAMP SUPPORT Filed Nov. 29. 1921 4 Sheets-Sheet 4 ATTORNEY Patented Dec. 28, 1926.

UNITED STATES PATENT OFFICE.

JOSEPH GELB, OF NEW YORK, N. Y.

ADJUSTABLE LAMP SUPPORTQ Application filed November 29, 1921. Serial No. 518,543.

several lamps can be adjusted to direct their rays of light at various angles. Another object is to provide yielding means for securing the pedestal to its supporting base so that vibrations will not be transmitted to the lampsf A further object is to provide yielding means for supporting the lamp bulbs to prevent the breakage of their fila ments. A still further object is to provide supports for a plurality of lamps, which are adjustable in vertical and horizontal planes so that the. direction of the rays of light may be accurately controlled to suit varying conditions in photographic or motion picture work. Another object is to combine and correlate the various instrumentalities herein set forth in such manner that they will effectively perform the functions described.

Further objects will be apparent from the tion with the accompanying drawings in which n Fig. 1 shows in side elevation one embodii ment of my invention; Fig. 2 is a detail in horizontal line 22 of Fig. 1; s v

Fig. 3 is a section-online 33 of Fig. 1; Figs. 4:, 5, 6 and 7 are detail Views illusi trating modifications;

Fig. 8 is an enlarged detail illustrating mean for holding the flexible lamp support in fixed poition; I i Fig. 9, 10 andll are detail views illusjustable bracket in such a manner that the following description when read in connecsection on trating yielding means for supporting incandescent lamps;

Fig. 12 is a detail view showing an alternative construction of adjustable support;

b Fig. 13 is a detail of a modified form of ass. Figs. 14 and 15 illustrate another modification embodying the invention.

Referring first to Figs. 1 to 3, 1 represents a base or support which may be either permanently secured to the floor of a building or may be provided with casters 2 to permit the structure to be moved at will. An upright pedestal 3 is yieldingly secured to the base 1 by springs 3 which are interposed respectively between

collars

3 and 3 and a hub 1 formed on the base 1. The ends of the springs 3 are bent over and engage

notches

3 and 3 formed in the collars '3" and 3 and the opposite ends of the hub 1. The portion of the pedestal between the collars 3" and 3 is cylindrical in shape to permit of slight rotary movment relatively to the base 1. This construction permits the pedestal to move vertically and also to turn slightly against the action of the springs and thus provides means whereby shocks due to vibrations are damped. The springs'are subjected either to torsional or compressive strains, and prevent the lamps from flickering and also lessen the breakage of the filaments of the lamps.

The pedestal 3 slidably supports carriages at and 5 which in turn each support a multiplicity of lamps which are adjustable in a great variety of directions as hereinafter described. The carriage 5 is connectedby means of a cable 6 to the periphery of a hollow drum 7 loosely mounted on a fixed shaft 8 which is secured to hubs 9 formed in a housing 10 supported at the upper end of the pedestal 3. Mounted in the interior of the drum 7 is a volute spring 11, one end 12 being secured to theinner surface of the drum, and the other end 13 being secured to the fixed shaft 8. The spring 11 is adapted to exert sutficient torque on the drum to 1 counter-balance the weight of the carriage- 5 and the "various lamps and supports car- I ried thereby. This arrangement permits the carriage to be very easily moved to different positions of vertical adjustment and the spring is sutficiently strong to hold the carriage in such adjusted position. However, to prevent undesired movement of the carriage, I provide thumb screws 14 which are threaded into the walls of the carriage and impinge on the surface of the pedestal 3 so as to positively hold the carriage in position of adjustment and prevent its accidental movement due to carelessness of an operatoror to vibration of the building in which the lamps are being used.

The carriages 4 and 5 are identical in con struction, as also are the adjustable lamp supports carried thereby, therefore, a description of one carriage and its associated adjustable supports will suflice for both, the same reference letters being applied to the similar parts.

Each carriage is provided with an eyebolt 15 to which the cable 6 above referred to is attached. Each carriage is also provided with a pair of outwardly extending lugs 16, Fig. 3, each of which adjustably supports apair of

brackets

17 and 18 which are pivoted on

studs

19 and 20. The

brackets

17 and 18 are each formed with an arcuate slot 21 through which projects studs 22 and 23, said studs being carried by the lug 16.

Winged nuts 24 and 25 engage the studs 22 and 23 and are arranged to clamp the

brackets

17 and 19 in different angular positions of adjustment. The

pivot studs

19 and 20 are also provided with winged nuts 26 and 27 which serve toadditionally clamp these brackets in their desired position of adjustment. The

brackets

17 and 18 are provided at their outer ends with

ears

28 and 29 in which are pivotally secured vertical supporting

rods

30 and 31. At the lower end of each

rod

30 and 31 is secured a fixed collar 32 having a lug 33 to which is pivoted one end 34 of a lazy tongs 35. Located a short distance above the collar 32 is a collar 36 adapted to slide on the rod 30. The collar 36 is formed with a lug 37 to which another member of the lazy tongs is pivoted. It will be understood that as the lazy tongs is collapsed or extended the collar 36 will slide vertically on the rod 30. In order to lock the collar 36 in any desired position of vertical adjustment, I have provided a latch bar 38, Fig. 8. adapted to enter notches 39 cut in the vrod 30, this latch bar being carried by a hand lever 40 pivoted at 41- to the lug 37 on the collar 36. A spring 42 carried by the collar 36. normally holds the bar 38 in engagement with the notches 39. By this "means it will be seen that the lazy tongs can be held in numerous desired positions of adjustment. At the outer end of the lazy tongs 35* are pivotally secured two

collars

43 and 44 respectively. The collar 44 is fixedly secured to a vertical rod 45, the collar 43 being slidably mounted on said rod. Secured to the ends of this rod and straddling the collars mounted thereon, is a yoke 46 adapted to limit the movement of said collar 43 and another collar 47 which is s0- cured at 48 to a second lazy tongs 49. The upper end of this lazy tongs being secured at 50 to a collar 51 slidably mounted on the rod 45. Secured to the outer ends of the lazy tongs 49 are a pair of

collars

52 and 53 the former being secured to a vertical rod 54 and the'latier being slidably mounted on said rod. This rod 54 is pivotally secured at each end to

arms

55 and 56 of a lamp supporting bracket 57 having horizontal arms 58 which pivotally support studs 59 carried by the lamp casings L. Each stud 59 is provided with a clamp nut 60 by means of which the lamp can be securely held in an desired angular position of adjustment.

Reference to Fig. 3 will show that each of the lugs 16 of the carriages 4 and 5 supports

brackets

17 and 18, and each

bracket

17 and 18 supports one lamp easing L. As there are two brackets 17 and two brackets 18 on each carriage, it will be appreciated that standard 3 supports eight lamp casings L, four being supported by the carriage 4 and the other four by the carriage 5. Each carriage and the plurality of lamps supported thereby is counter-balanced by a single spring drum 7, in other words, one spring drum counter-balances the weight of four lamps. This is an important feature because heretofore each lamp has usually been counterbalanced by a separate weight or its equivalent which required considerable space and greatly increased the number of parts.

From the above description it will be clear that a great variety of adjustments can be obtained for any of the lamps. For example, by looseningthe wing nuts 24 or 25 the

brackets

17 and 18 may be independently swung on their

pivots

19 and 20 so as to adjust the entire assemblage of associated parts including the

lazy tongs

35 and 49 to various angles to the horizontal. If desired the lamp L can also be tilted about the stud 59 to further accurately adjust the direction in which the rays of-light from the lamp shall be reflected. Thelamps may be moved toward or away from the pedestal 3 by collapsing or extending either one or both of the

lazy tongs

35 and 49. Additionally the lazy tongs 35 may be swung about the vertical axis of the rod 30 and the lazy tongs 49 may be similarly swung about the axis of the rod 45 to various angular positions. The lamp supporting bracket 57 may also be swung about the vertical axis of rod 54 alias clearly shown in Fig. 3;

This multiplicity of adjustments permits III an operator to accurately direct the rays of light from any given lamp to any portion of an object he may wish to photograph, and

it also permits numerous relative adjusts ments between adjacent lamps as will be understood.

Instead of supporting'the lamps from vertically movable carriages riding on a pedestal, I may in some instances wish to support them from a fixed support. Such an arrangement is shown in Fig. 5, in which the bracket 61 is hung on a stud 61? and is provided with an extension 62 adapted to pivotally support a swinging bracket 17 of substantially the same construction as the

brackets

17 and 18, above referred to, this bracket also being provided with a vertical rod 30' adapted to support a lazy tongs in a manner very similar to the way in which the laz tongs 85, above described, is supported.

n Fig. 4 I have shown a vertically adjustable lazy ton'gs 63 supported at the bottom on a fixed collar 64 and another collar 65 which slidably engages a supporting rod 66 secured to a. fixed base 67. At its upper end the lazy tongs 63 carries a bar 68 which 1n turn supports a bracket 69' having upwardl extending arms 7 0 provided with trunnlons 71 and suitable clamping means 7 2 for holding the lamp L in different positions of angular adjustment. In this device it will be seen that by extending or collapsmg the lazy tongs 63 the lamp can readily be adjusted so as to direct its rays of light from different elevations and the lamp can also be swung about its pivot 71 to any desired angular adjustment. The rollar (S5 to which the lower end of the lazy Longs 63 is attached is preferably provided with a lockmg means similar to that shown in Fig. 8. so as to hold the lamp in different elevated positions. This form of device can be collapsed into a very small space and carried about for outside work in a suitable carrying case. I

Fig. 6 shows a modification in which lazy tongs 35 is mounted on a vertical rod 30 carried directly on a carriage 5 thereon.

. the rod 31 and its lower supporting collar which is slidably mounted on the pedestal 3.

In Fig. 7 Thave shown a slightly modified arrangement in which the bracket 17 carrying the rod'3O has a lazy tongs 35 supported thereon, the lower collar 33 being fixed. and the upper collar 36 being slidable Behind bracket 17 is a bracket 18 carrying a rod 31 supporting another lazy tongs which is the same as the similar element mounted on the rod 30 but mounted in inverted position, that is to say, its upper supporting collar is fixedly secured to slides thereon. As, thus arranged it will be seen that when the two lazy tongs are in the partly extended position, as shown, it-is pos-v slble to'swmg one of them about its vertical pivot across the top of the other. Such an adjustment is sometimes very desirable, for

instance after one lamp has been adjusted to a given position and it is then desired to direct more light to one side or the other of the position to which the first lamp is adjusted.

- The lamps L supported by the adjustable means above described may be either are or .incandescent lamps or in fact these supporting structures may support lights of any sort suitable for various purposes.

Fig. 9 shows a preferred arrangement for supporting incandescent lamps in such manner that vibrations will not cause the destruction of the sensitive tungsten filaments. The casing 73 is substantially rectangular in shape and has a suitable reflector 7 4 mounted therein behind the

incandescent lamps

75 and 7 6 which are carried by

receptacles

77 and 78 secured to

bars

79 and 80. These bars are each supported by springs 81. They are supported in identically the same manner and a description of one will sulfice for both. Details of this supporting struc- 79 or 80. The bushing 84 is provided with grooves on itsexterior in which a few convolutlons of the end of the spring are firmly seated. A cotter pin 86 18 secured near one endof the shank 83 to limit the down-' ward motion of the lamp carrying bar in the event that the spring 81 accidentally becomes dislodged. This construction provides a yielding support for the

lamps

75 and 7 6 and serves to dampen shocks due to rough handling when adjusting the position of the lamp brackets and also absorbs shocks due to vibrations in buildingsin which the lamps are used and assists in prolonging the life of incandescent lamps which are provided. with sensitive tungsten filaments. The construction also'lessens the transmission of heat from the lamp to the casing L as it is apparent that the

bars

79 and 80 are so positioned that'air can circulate freely around them and thus tending to cool the same. On the other hand if the

bars

79 and 80 were mounted directly on the metallic casing the heat would be more directly transmitted to said casing by radiation and convection. I

The base 1 instead of carrying one pctlestal 3, as shown in Figs. 1 and3, may be provided with a plurality of such pedestals as indicated in Fig. 13, thus providing a structure which will carry practically double the lazy tongs above described I use a series of members adapted to telescope one into the other. In this form of my device the carriage 5 pivotally supports a bracket 90 which may be clamped in different angular positions by the wing nut 24 similar to the arrangement shown in Fig. 1. The bracket 90 is formed with a hub 91 having an elongated tubular member 92 secured thereto.

Into the end of said tube is telescoped anoth-.

pedestal itself of separate members which telescopically engage one another so that the lamps carried thereby can be adjusted to different elevations as desired. Such an arrangement is shown in Figs. 14 and 15, in which the fixed pedestal 100 carries on opposite sides thereof

housings

101 and 102 within which are mounted spring actuated

drums

103 and 104, similar in construction to that shown in Fig. 1. A tubular member 105 is slidablymounted in the hollow pedes tal 100 and carries at its lower end a lateral pin 106 which rides in a slot 107 formed in one side of the wall of the pedestal. A cable 108 connects the pin 106 with the drum 103 so that the weight of the' member 105 and the parts carried thereby is counterbalanced by the spring drum. The member 105 carries a pair of lugs 109 which pivotally supports a bracket 110 having lugs 111 formed thereon which in turn pivotally sup.- port ajvdke 112 which supports a lamp cas ing 113 on pivots 1'14.

A rod 115 is slidably supported by the member 105 and carries a lateral pin 116 near its lower end which extends through slots formed in the member 105 and the pedestal 100 and is connected by a cable 117 to thespring actuated drum 1. The rod 115 IS reduced in diameter'at 116 to form a journal for a bracket 117 which swivels thereon.

The bracket 117 carries lugs 118 whichpivotally support a bracket 119. This bracket I carries a yoke 120 which adjustably supports the lamp casing 121 in the same manner that the yokev 112 supports the lower lamp casing 113.

The advantage of this construction will be apparent by comparison of Figs. 14 and which show two extreme positions of adjustment. The upper bracket 117 can be turned 180 degrees and the rod 115 lowered to bring the, lamp 121 to the dotted line po sition of Fig. 15 to substantially the same elevation as the lamp 113, the tube 105 being slotted at 122 to permit the lugs 118 to travel therein. By adjusting the

brackets

119 and 110 or the

yokes

120 and 112, both lamps can be focused on the same object or on different parts of the same object as desired. Various other combinations of adjustment may be made todirect the light to any desired location as will be understood by those skilled in the art.

\Vhile I have described with great particularity the details of the embodiment of the invention shown, it is not to be construed that I am limited thereto as changes in arrangement and substitution of equivalents may be made by those skilled in the art without departing from the invention as de lined in the appended claims.

IVhat I claim is:

1..An adjustable lamp support comprising a supporting base, a pedestal yieldingl v carried thereby, a carriage slidable on said'pedestal, means carried by said carriage for adjustably supporting a plurality of lamps and a single device for counter-balancing the weight of said carriage and the lamps and lamp supporting means carried thereby.

2. An adjustable lamp support comprising an upright pedestal having a slidable car-' riage mounted thereon, a bracket mounted on said carriage for movement about a substantially horizontal axis, clamping means for locking the bracket in adjustable position, means for adjustably supporting a lamp on said bracket for movement about a substantially vertical axis and means located wholly above said carriage for counterbalancing the weight thereof and parts supported thereby.

3. An adjustable lamp support comprising an upright pedestal having a slidable carriage thereon, a spring eounterbalancing drum secured to the top ofthe pedestal and having a flexible member connected to the top of said carriage, an angularly adjustable lamp supporting member mounted on said bracket for adjustmentabout asubstantially vertical axis.

4. An adjustable lamp support including an upright pedestal, a carriage slidably mounted thereon, a bracket pivoted to said carriage on a horizontal pivot, a-lazy tongs supported on a vertical rod pivotally mounted in said bracket and means movable relatively' to said lazy tongs for supporting a lamp and a. spring actuated drum for counbracket on said carriage and an expansible terbalaneing the weight of said carriage and parts supported thereby.

5. An adjustable lamp support comprising an upright pedestal, a carriage movable vertically thereon, an angularly adjustable bracket secured to said carriage, a lazy tongs supported by said bracket and movable relatively thereto about a vertical axis,

a second lazy tongs pivoted to the first named lazy tongs for an ular horizontal adjustment, and a yoke a justably secured to the second named lazy tonis having horizontal pivots for adjustably olding the lamp.

In Witness whereof, I have hereunto signed my name.

JOSEPH GELB.