US1965428A - Lighting fixture - Google Patents

Description

July 3, 1934. J o lL 1,965,428

' LIGHTING FIXTURE Filed Aug. 25, 1932 Figl. Fig.2.

Tnventor: James A. ONeLl bfgm km HLS Attorney Fatented July 3,. 1

James A. ONeiLLynn,

Electric Company, a

Application August 25, 1932,

T PATENT OFFICE LIGHTING FIXTURE 3 Claims.

My invention relates to lighting fixtures and more particularly to lighting fixtures of the type used for street lighting.

In themanufacture 0 omy, to manufacture units tha for use in the various multiple an in common use, and also for use different capacities, without of the uni ward appearance f street lighting units it is necessary, for the sake of uniformity andecont will be adapted d series circuits with lamps of changing the outt and without performing extensive changes within the unit.

It is therefore, the

to provide an improved inc lighting fixture using will readily adapt main object of my invention structure for a street andescent lamps, which itself for use in various lighting circuits and with lamps of different capacities.

In connection with a street lighting fixture, it

is desirable to be fractor or other light able to adjust the lamp so as to to the reunder certain circumstances, it is desirable to utilize in the construction a transformer through which the lamp is supplied with current. More specifically, the object vide an improved constructio wherein a transformer may of my invention is to pron and arrangement be attached to the fixture when its use is required and wherein a portion of the adjusting means for the lamp forms a part of the fastening means for the former.

My invention the following description nection with the transwill be better understood from when considered in conaccompanying drawing and its scope will be pointed out in the appended claims. 7

Referring to the drawing, Fig. 1 is an elevation,

partially in section, built in accordance is an elevation of the same the mounting of a tion, illustrating within the fixture in accordance with tion, looking in the direction and Fig. 3 is a sectional view alon of the arrows.

of a street lighting fixture with my invention; Fig. 2

fixture, partly in sectransformer my inveng line 3--3 Referring to the drawing in detail, 10 is an ining device means of a support 1'7 an from a collar 18 hinged locked thereto at 20.

mounted in a socket 11 which is vertically adjustable by means of described hereinafter in lamp 10 is surrounded by a refractor an adjustdetail. The 12, provided section 12', and a globe a sheet to the casing metal casing 14. 12 is supported from an annular lower end of the casing 14, by d the globe is supported at 19 and Mass, assignor to General corporation of New York Serial No. 630,392

The casing 14 is attached to a cover 22 by any convenient means such as screws 23, for example, and the ccver22 in turn may be suspended from any convenient bracket (not showni by means of a series of interlocked sleeves 25, 26 and 2'7'insulated from the cover 22 by bushing 28 and collar 29.

To adapt the fixture for use with differently sized lamps and to obtain the maximum lighting efiiciency therefrom the socket 11 is vertically adjustable. The adjusting is effected by a threaded stud 31 which projects through the top of'the cover 22 and is operable by means of a head 32 which is attached to the stud in any convenient manner. A rain-tight joint is formed at the top of the cover 22 by a bushing 33 threaded into the top of cover 22 and projecting into an annular space formed between the head 32 and the stud 31.

Adjustment of the socket 11 is obtained by turning the stud and obtaining a movement of a single support 35. The support 35 is made of sheet metal which is attached to the socket at one end and bent into a U-shape at the other end, thereby engaging the stud 31 at two points 35 and 35". In order to prevent the support 35 from turning in a horizontal plane, guide rods 36 are provided. Guide rods 36 are attached to depending fiange or wall, 37 at their upper ends and to the threaded stud 31 at its lower end by a plate 38. I

The guide rod 36, in accordance with my invention, is locked into flange 37 by a locking nut 40 which is turned tightly up against the flange and thereby locks guide rod 36 into place. The threads on rod 36 are, however, extended so that if it is desired to use an inductance device 41, connected to the socket 11 by lead 42 as shown in Fig. 2 the guide rod may be used to support it. This is accomplished by lowering the nut 40 until enough space is provided for inserting the core between the nut 40 and the downwardly facing surface of the flange 3'7, inserting the core of the inductance device 41 therebetween and again turning the nut upward until the core is tightly held. The guide rods 36 are therefore adapted to perform two functions, first, the function of guiding the bracket 35 and second, the function of also obtained since a single lamp structure clamped against it by screws as shown at the right-hand side of Fig. 2, and by the guide rods 36. Viewed from one aspect, therefore, rods 36 may be considered as being extensions of certain of the fastening means for the transformer. I

By my invention it will be seen that I provide an improved construction whereby whena lighting fixture is to be used with a transformer, the transformer may be clamped or fastened against the downwardly facing fiat surface of'fiang'e 37 without requiring any change in the structure. The surface of flange former is fastened is located above bracket 35 a distance such that with the transformer in position, the lamp socket 11 carried by bracket 35 may be adjusted the amount required to cor rectly focus the lamp carried by the socket. On the other hand, if a transformer is not required it may be omitted without in any way affecting the functioning of the lamp adjusting means. In this manner a great saving is obtained in the installation of the inductance devices. Savings in the manufacture and stocking of the fixtures are model can be adapted for a great number of different lighting circuits and a large number of differently sized lamp s- What I claim as new and desire to secure by Letters Patent of the United States, is: w

1. In a lighting fixture, the combination of a casing, a depending wall in the casing having a downwardly facing surface, an inductance device,

37 against which the transmeans for fastening the inductance device" against said surface, one or more of said fastening means being extended to form depending guide rod means, a support on the guide rod means, a lamp socket carried by the support, and means for adjusting the support along the guide rod means.

2. In a lighting fixture, thev combination of a casing, a depending wall in said casing having a downwardly facing surface, a lamp socket and a support therefor, adjusting means for vertically adjusting said support, guide rods for said support mounted in said wall and depending from said downwardly facing surface, locking means arranged to cooperate with said surface for looking said guide rods in'said wall, an inductance device connected to said socket, and means including said guide rods and said locking means for fastening said inductance device against said surface.

j 3. In a lighting fixture, the combination of a casing, a depending wall in the casing having a downwardly facing surface, said surface being provided with means whereby an inductance de vice may be fastened thereto, a guide rod depending fromsaid surface and provided with means cooperating with said first named means for fastening an inductance device against said surface, a support on said guide rod, a lamp socket carried by said support, and means for adjusting the support along the guide rod.

JAMES A. ONEIL.

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