US1960534A - Floodlight - Google Patents

Description

J. J. GIBNEY May 29, 1934.

FLOODLIGHT Filed May 16.

l/Vl/f/YTO/Q {Ewes J: 67512639 Patented May 29, 1934 UNITED STATES PATENT OFFIE FLO ODLIGHT James J. Gibney, Minneapolis, Minn. Application May 16, 1932, Serial No. 611,550

6 Claims.

1T5 erally stated, the invention consists of the novel devices, combinations of devices and arrangement of parts hereinafter described and defined in the claims. i

In the accompanying drawing, which illustrates the invention, like characters indicate like parts throughout the several views.

Referring to the drawing: Fig. 1 is a top plan View of the device with some parts broken away;

Fig. 2 is a view partly in elevation and partly in section, taken approximately on the line i l conventional flood light type of reflector 26 hav- 22 of Fig. 1;

Fig. 3 is a fragmentary detail having some parts sectioned on the line 3--3 of Fig. 1, and some parts shown in full;

Fig. 4 is a detail view taken on the line 4-4 of Fig. 3, and showing some parts in face elevation; and

Fig. 5 is a diagrammatic view illustrating the I member 6 is a shaft 10 that is driven from the motor 9 at a greatly reduced speed through a conventional transmission mechanism including a 'co-operating pair of worm gears 11, one on the shaft 12 of the motor 9 and the other on 5 a transverse shaft 13, a co-operating pair of worm gears 14, one on the shaft 13 and the other on a vertical shaft 15, a spur pinion 16 on one projected end of the vertical shaft 15 and a co-operating spur reduction gear 1'7 fast on one projected end of the shaft 10.

The complete power and transmission, which is comprised mainly of the'motor 9, gears and mounting member 6, is enclosed in a housing 18 comprised of lower and upper axially separable sections 19 and 20, respectively, the latter being in the form of a deep flanged cover. The lower or main housing section 19 is securely but detachably mounted on the projected screwthreaded lower end portion 10 of the shaft 10' for rotary movements therewith by a thumb nut 21.

The screw-threaded end 10 of the shaft 10 extends through an axial hole in the bottom of the casing section 19 and the thumb nut 21 is applied to the shaft beyond the casing where it is readily accessible. A plate 22 is secured to the inside of the housing section 19 by screws or the like 22 and is provided, in axial alignmentwith the said shaft-receiving hole in the V casing, with a sleeve 22 that receives the shaft 10 and is pressed into sufliciently tight frictional driving engagement with a shoulder 23 of the shaft 10, by the thumb nut 21, to cause the housing to partake of common rotary movements of the shaft 10.

The lower section 19 of the housing 18 besides serving as a closure for the driving mechanism also serves as a rotary carrier for a plurality of light founts 25. These light founts are preferably and as illustrated in the form of flood 570 lights and each thereof is comprised mainly of ing a conventional light bulb or the like 27 mounted in a suitable socket 28 at its closed end. Near their socket-equipped closed ends, the re- T flectors are provided with ventilation apertures 29. The flood lights are circumferentially spaced equi-distant about the exterior of the housing 18 and each thereof is independently adjustably secured to the lower housing section 19 by co -("g operating pivotally connected hubs 30 and 31, the former being rigidly secured to the casing section 19 by flanges 32 and rivets or the like 33, and the latter being rigidly secured to their respective reflectors 26 by flanges 34 and rivets or the like 35. The co-operating hubs 30 and 31 are pivotally connected on an axis substantially radial to the axis of rotation by bolts 36 that have axial screw-threaded engagement with the hubs 31 and work slidably throughfig guide apertures 37 in the closed ends of the hollow hubs 30.

The lights 25 are held in a desired pivotally adjusted position by radially disposed doubleacting ratchet teeth 30 and 31 formed in en-( gaged faces of co-operating hubs 30 and 31 respectively. Co-operating teeth 30 and 31 are normally held in mesh and against accidental ratchet action by compression springs 38 that are applied on the inner projected ends of pivot' bolts 36 and are compressed between the closed ends of the hubs 30 and the head 36 of the bolts 36. The compression of these springs is sired position in respect to the axis of rotation and the adjustment will be retained by the spring-engaged ratchet teeth.

Secured to the mounting member 6 and projected therefrom through an axial opening 20 in top of the housing section 20 is a supporting bracket 6 from which the entire light projector may be supported in a desired manner from a suitable convenient fixed structure. In the preferred arrangement illustrated, this supporting bracket 6 is provided at its outer end with a flange 38 having a radially disposed series of circumferentially spaced ratchet teeth 38 formed therein and adjustable connection to a wall 2/ is accomplished by means of a universal hanger. This universal hanger arm comprisesa bracket 39 rigidly secured to the wall y, an extended section 40 that is provided with a flanged fitting 41', a flanged fitting 43 horizontally pivotally connected to the fitting 41 by a thumb nut equipped bolt 45, a gooseneck section 46 extending from the fitting 43, and flanged fitting 47, on the free end of the gooseneck section 46 that is horizontally pivotally connected to the flange 38 of the bracket 6 by a thumb-nut-equipped bolt 49.

To prevent accidental pivotal movements of the parts on the bolts45 and 49, from a set position, the face of the flanged fitting 41 is formed with a circumferentially spaced, series of radially disposed double acting ratchet teeth 42 that intermesh with a like series of teeth 44 formed in the opposed face of the flanged fitting 43 and aconventional electric power line, not shown,

through a plug 50 and a circuit comprising leads 51 and 52, the latter having a motor switch 53 interposed therein. The light bulbs 27 are connected to the same source of potential as the motor 9 through a li ht circuit comprising part of motor lead 51, a lead 54 extending from lead 51, a brush 55 working on an annular commutator 56, a bolt 57, leads 58 and 59 connecting the several light bulbs in parallel, a bolt 60, a commutator 61, a brush 62, and a'lead 63 that connects to the motor lead 52 ahead of the motor switch 53.

The commutators 56 and 61 are mounted on an insulating sleeve 64 that is fast on and driven with the sleeve 22 and this bushing is formed with an intermediate flange 65 that maintains the commutators in insulated relation. The bolts 5'7 and 60 draw the commutators into tight friction driving engagement with opposite sides of the flange 65 and each thereof makes electrical connection with one commutator but is insulated from the other thereof by a bushing 66.

When one or more of these light projectors are used in a sales display room, display window or the like, it or they will usually take the place of amuch greater number of conventional'sta tionary flood lights andwill be, exceedingly more effective in attracting and holding attention on thedisplay than the ordinary flood lights, due to the progressive movement ofthe several beams of light thereover. By independently pivotally flanged rims 67 that may be detachably applied to the front portions thereof by set screws 68 to retain sheets of suitably colored translucent material over the open ends of the reflectors. Each reflector may o f course, be provided with a sheet of the same or a different color but most highly attractive light effects can be often accomplished byplacing a different color over each reflector so that progressively different colored beams of lightwillbe passed over the objects on display. Qbviousll, of course, the devices may be employed as a stationary light projector whenever it is desired, in which case various attractive effects can also be produced both with and without color. V

For the purpose of cooling the motor 9, I provide a series of ventilating apertures 71 in the upper housing section 20 and equip one end of the motor shaft with an aircirculating fan '70.

What I claim is:

l. A light projector comprising a mounting member, a motor carried by said -mountingmemher, a motor housing enclosing said mounting memberand journaled to the latter, connectionsllO for rotating said housing from the motor, a plurality of flood lights mounted in circumferentially spacedrelation about the exterior ,of said housing for movements therewith, means for independently angularly adjusting each of the floodf115 lights in respect to the axis of rotation, and means projecting through thetop of the casing for securing the motor mounting member toa fixed. Q RQ $r 2. The structure defined in claim 1 in whicheqzo said last'riotedmeans is angularly adjustable relative to the axis of rotation.

3 A light projector comprising a mounting memb r, a m'otorcarried by the mounting member, a shaft J' ournaled in said mounting member, q25

'connectionsfor driving said shaft from said'motor, a housing enclosing said-mounting member and motor, said housingbeing substantially concentric to the said shaft and'comprising axially separable sections, means detachably securing qgo one ofsaid sections to and for rotary movements with the said motor driven shaft, a reflectorequipped light mounted on the exterior of one of said'housingsections, and means extending from said mounting member through the other of saidq 5 housing sections for securing said mounting member to a fixed support.

4. In 'combination, a supporting arm provided atone end with means for connection to a fixed support, a complete self-contained light-project-gaw ing unit supported from the free end of said supporting arm and comprising amounting member anchored to the free end of said supporting arm,

a rotary lightcarrier journaled from the mounting member, a motor supported from-the mount- 1 5 the rotary light carrier "at-a point radially offset from the axis thereof. E5150 5. In combination, a supporting arm provided at one end with means for connection to a fixed support, a complete self-contained light-projecting unit supported from the free end of said supporting arm and comprising a mounting member anchored to the free end of said supporting arm, a rotary light carrier journaled from the mounting member, a motor fixedly mounted on said mounting member and having driving connections for rotating the light carrier, and a flood light carried by the rotary light carrier at a point radially offset from the axis thereof.

6. In combination, a laterally adjustable supporting arm provided at one end with means for

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