US1792498A - Lamp-socket mounting - Google Patents

Description

Feb. 17, 1931. c; H, LARSON 1,792,498

LAMP SOCKET MOUNTING Filed Aug. 51, 1925 3 Sheets-Sheet 1 Feb. 17, 1931. c. H. LARSON LAMP SOCKET MOUNTING s Sheets-Sheet 2' Filed Aug. 31, 1925 inventor; Far] Zimson Feb. 17, 1931. c. H. LARSON 1,792,493

LAMP SOCKET MOUNTING Filed Aug. 51, 1925 s Sheets-Sheet s Carl fllarson W. Wm [4/95 Patented Feb. 17, '1931 UNITED STA ES ATQENT OFFICE CARL H. LARSON, or MELRosErAnx, ILLInoIs, AssIGnoR TO THE ADLA IE COMPANY,

A. oonrona'rioiv or ILLINOIS LAMP-sOGKE'I' MOUNTING Application ifiled August 31, 1925. Serial No. 53,514.

This invention relates to electric lamps and more particularly to the mounting or support for the bulb and adjusting mechanism. One of the objects of the invention 1s the provision of new and useful means for mov-,

' bujlbsupport and bulb adjusting-mechanism nism within a lamp casing or housing that Q in operative position Within the lamp casing,

adjusted positions. 7 I

within a lamp casing, together with new and improved means for holding sald support in Anotherobject of the invention is the provision of new and improved means for movably mounting a bulb and adjusting mechais simple in construction, cheapto, manufacture,easily operated, efiicient in use, and that is not likely to becomebroken or get out oi order. I i j r Other and further objects and advantages of the invention will appear from the following description taken in connection withthe accompanying drawings, in wh ch Fig.1 is a side'elevation of a lamp casing showing the invention in position therein, with parts in section, and showingthe 'reflector and lamp socket support in operative position; I v

Fig. 2 is a similar view on a larger-scalq with parts broken away, and parts 1n section, 7

showing the reflector and lamp socket support turned rearwardlyto the inoperative position;

V Fig, 3is a rear elevation of the device while with the door ofthecasing open, Fig. i is a plan View of the device, and

' Fig.5 is a section taken on the line 55 of Fig. 1. 1 V On the drawing the reference character 10 designates a casing in which the invention is mounted. The casing 10 may be any suitable casing for a lamp, the form shownheing by way ofrexample'only, and. illustrates a casing for a semaphore lamp. The casing 10 is provided with a transparency 11 at the front, which may be in the form of a lens. The casing is open at its rear end andis providedwith a door 12, hinged at 13 for closing the opening. A spring-pressed latch 14 is adaptedto hold the door in closed position,

as is usual in such constructions. The lamp may be provided with a carrying bail or handle 15, in the usual manner. Since the details of the casing constitute no part of the invention, it is not thought necessary to-further describe the same. 7 j

In semaphore and certain other types of lamps it is desirable or necessary to provide a reflector for increasing the intensity of the projected beam of light. When a reflector is employed in lamps having casings such as that used on semaphore lamps like that shown in Fig. 1, it is difiicult to have access to the light bulbs through the door 12,. because the reflector is located between the door and saidbulbs. This difficulty is overcome in the present invention by mounting the bulb and reflector supports on a plate pivoted across the casing and adjacent to the lower end of the door opening, thus permitting these elements to be swung backwardly and downwardly, leaving thebulb uppermost. 7

To this end, in the embodiment oi the invention disclosed, a plate .18 is secured as by means of the bolts 21, 21 to the bottom of the casing, and a plate 17 is hinged to the rear end of-the fixed plate, as shown at 19 the two plates lying-in close relation in service position. To prevent lateral vibration of the plate 17, it is provided with arecess 30 in its forward end for receiving an upturned lip yTl'lB standard 26 carrying. a lamp socket 25' for the bulb 4A issupported upon a plate, 17'through the medium of adjusting mecha- 'nism. As shown, a plate 28 is fixed to' the upper faceof the plate 17 its rearward end being extended upwardly and backwardlyto constitute an adjusting bracket 34, and" itsfforward end beingofiset upwardly and ceive the rod ed with downwardly extending flanges 42, constituting feet for resting upon the plat- 28, and being centrally slotted as shown 29 to receive the post 3 A rod 32 attach to the rearward end ot the plate 24 pro e through an aperture 33 in the bracket 34 and carries upon its end portion a nut by neans of which the plate may be drawn backwardly against the resistance 01" a spring 37 connecting the standardlll with the 30st 31. thereb Y providin for the axial i i h adjustment of the bulb 44. The vertical ad justmcnt of the bulb is secured by means oi a: plate 35 slidably engaging the rearward face of the bracket 34 and aperturedto 32 and longitudinally slotted to engage a stud 38 setting througl the'braeket 34, and threaded to receive a binding nut 41 for clamping the plate in its adjusted position.

The plate 35 transmits pressure from the nut 36 to the bracket 34'. This bracket serves the further purpose of a handle, by which the plate 17 may be swung about its pivot.

lVhen it is desired to adjust the bulb vertically the binding nut 41 is loosened and the plate 35 is moved upwardly, which will elevate the rod 32 projectin through sai plate, and this in turn will elevate the rear end of the plate 27 and with it the lamp socket supporting standard 26 mounted thereon. During this inoven'ientthe plate 27 will pivot about the lower portions of the flanges 42. hen this adjustment is completed it may be necessary to adjust the bulb along the axis or? the lens to get the proper focus. This is accomplished by adjusting the nut 36. By releasing thenut the spring 37 will move the plate outwardly and by turning the nut in the opposite direction it will move the rod 32 rearwardly against the tension of the spring 37,,carrying with it the standard 26 and bulb 44.

Two sockets 25 are employed, being proidcd with electric light bulbs 43 and 44, respectively. The parts are so adjusted that the bulb 44 is at the focal point of the reflector 21.. The bulb 43 is employed solely for en'iergeucy purposes, and is auton'iatically lighted when the filament of the bulb 44 becomes broken.

The lamp sockets are provided with the usual conductors 45, which are held in proper position; by a suitable clip 46. Since the mechanism for insuring the lighting of the bulb 48 when the filament of the bulb 4 is out of o 'der, constitutes no part of the present invention, it not thought necessary to illustrate and describe the same. The inmuanism may beany one of the con-ventional types of commercial devices employed for this purpose.

Suitable means are provided for holding the plate 17 in either of its extreme positions as shown respectively in Fig. 2 and Fig. 1. Any suitable mechanism may be employed for this purpose. It is desirable that the means employed be automatic in its operation, and in. the form of the device selected to illustrate one embodiment of the invention a spring-pressed arm, with cooperating parts on therefiector support 23, is employed. As shown on the drawing the member 18 is provided with an upwardly extending flange 47 to which is pivotally connected the arm 48. The arm 48 is slightly curved, and is adapted to engage a stud 49 carried by-upwardly extending flange 51 on the hinge meni ber 17. T he arm 48 is provided with a notch 52 adjacent its hinged end, which is adapted to engage the stud 49 for holding the hinge member 17 in closed position. The outer or free end of the arm. 48 is formed to provide a notch 53, which will engage the stud 49 to hold the hinge member 17 in open position, as clearly shown in Fig; 2 of the drawing,

A spring 54, secured to the outer end of the hinge pintle 19 and connected to the outer end of the arm 48, is adapted to resiliently hold said arm in engagement with the stud 49.

The parts are so arranged that when it is desired to replace a bulb or inspect the lamp sockets or reflector, it is only necessary to open the door of the casing and puILrearwardly on the reflector support. Suflici'ent force applied in a rearward direction will cause the pin or stud 49 to slide out of the notch 52, thereby moving the arm 48 slightly against the tension of'tlie spring 54. The notch 53 will limit the pivotal movement ofthe reflector support, and Will automatically lock the same in open position. The parts may be moved to-closed position by applying pressure on the same in a forward direction.

The-parts are so arranged and the hinge 19 so located that when the closure for the easing is opened the reflector and bulbs may be moved rearwardly through the opening where access is had to the same for inspection and repairs.

I claim as my inven-tionv 1. A lamp comprising acasing having a lens in its front wall and a downwardly ope ning door in its rear wall, a plate pivoted adjacent to and parallel with the door pivot,

a reflector rigidly supported on the plate, a

bulb support slidingly mounted on the pivoted plate, a bracket projecting upwardly and backwardly from the rear end portion of the pivoted plate, a threaded rod projecting backwardly from the bulb support through the bracket, an adjusting nut on the rod reacting against the rear face of the bracket, a spring. anchored to. the pivoted plate.- and acting on the bulb support in opposition to the adjusting nut, a vertically movable support for the rear end of the rod, and means for binding said support to the bracket.

2. A lamp comprising a casing having a lens opening and a pivoted door in a'wall opposite to the lens opening, a plate pivoted adj acent to the door pivot, a lamp support slidably mounted on the plate, a bracket projecting upwardly from the rear end of the

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