US1605956A - Lighting fixture - Google Patents

Description

Nov. 9 1926.

w. L.'KORNFEL D ET AL LIGHTING FIXTURE 2 Shets-Sheet 1 Filed Jul 5. 1923 1,605,956 w. L. KORNFELD ET AL Nov. 9 1926.

LIGHTING FIXTURE 2 Sheets-Sheet 2 Filed July 5. 1923 Patented Nov. 9, 1926'.

UNITED STAT S PATEN BEIGE..-

WILLIAM L. KORNFELD AND ARTHUR R. ENGLANDER, OF'CLEVELANJ J, OHIO.

LIGHTING FIXTURE.

Application filed J'uv1y5, 1923. Serial No; 649,475.

Our present invention relates to an adjustable globe or shade supporting and at and attaching means which maybe readily adjusted when the parts are fully assembled to alter the relation between the electric lamp and the globe or shadethereby to obtain the greatest efficiency and, in the case of incorporating a reflector in our improved structure, to properly focus the lamp with respect-to the reflector.

A further object of the invention is to provide self adjusting means for connecting a glass shade or globe to the supporting structure thereby to compensate for expansion and contraction of the parts without danger of imposing undue strains upon the glass; to make such attaching means manually adjustable so that said means may be better fitted to globes or shades having attaching portions or necks of different sizes; and so that the shade or globe may be centered with respect to the supporting structure; and to provide means of the aforesaid character which greatly facilitates the 30 attachment of the shade or globe to the supporting structure.

For the purpose of securing our present shade or globe supporting means to thelamp socket'we preferably employ the construe tion covered by our co-pending application Serial No. 565,957, filed June 5, 1922, the present structure, in general respects, falling within the terms of certain claims of said application.

The objects above enumerated, with others which will appear hereinafter, are attained in the embodiment illustrated in the drawings accompanying and constituting a part hereof and wherein Fig. liis a sectional side elevation of a lighting fixture showing a globe sustained in proper relation'to an electric lamp by our adjustable supporting means; Fig; 2 is a fragmentary elevational view at right angles to Fig. 1; Fig. 3 is a plan view of what is shown in Fig. 1; and Fig. 4 is a detail of the globe or shade attaching means.

An electric lamp 1 is supported by a socket 2 which, in turn, is supported by the fixture element 3. Fitted about the lower end of the socket 2, with its upper edge engaging the enlargement 4 thereof, is a sleeve or shell 5. As will be noted, this shell is of two diameters, the smaller fitting closely about the socket 2 immediately below the enlargement 4, and pivotally connected, as by-means of rivets 6, to diametrically opposits points of the smaller portion of the shell 5 is a bail 7 which is adapted to be swung up over the socket 2 and engaged with the top thereof adjacent the neck 8" which receives the fixture element 3, the bail 7 being notched, as shown at 10 in Fig. 3, to accommodate the neck 8. It'will be noted that the open side ofthe notch 10'is quite restricted and that the parts or tongues 11 on opposite sidesthereof' are turned down to lock the bail to the neck.

For further details of this arrangement reference may be had to our'co-pending application hereinbefore identifie i i The lower end of the shell 5. is formed with screw threads 12 for cooperation with similar threads formed in a sleeve or shell] extension 14 which is through this arrangement adapted to be adjusted longitudinally of the shell 5. The top edge of the shell extension or sleeve 14 is'turned inwardly to provide a flange 15 which constitutes a stop that engages thetop convolution of the thread 12 to prevent withdrawal of the shell extension or sleeve from theshell 5 in a downward direction. It will be observed,

however, that all parts above the enlarged lower end of the shell 5 fall within the di aineter of said enlarged portion and this enables the shell extension or sleeve 14 to be screwed upwardly along the shell 5- until it is entirely disengaged from the threadsthereof, allowing the shell to be removed from the lower end of the shell extension or sleeve 14, thus facilitating assembly and disassembly of the parts. v

Shown as secured to the lower end of the shell extension or sleeve. 14 (although it is clearly within the scope of our invention to spin it or otherwise form it integral with said extension or sleeve) is an outwardly and downwardly flaring part 16, which ma have its inner side polished or suitably finished to providea reflectlng surface, and in asmuch as it 1s our preference to so treat said part 16 we may refer to it hereinafter as the reflector. VVhile'the part is shown as frusto-conical, it may be suitably dished in accordance with the usual form of reflectorsor, if desired, given the contour ot a true parabola.

The part 16 terminates at its lower end in a' depending flange 18 of a size to receive the neck 19 of a globe 20. The neck of the globe, as usual, is formed to provide an out wardly opening groove into whichyextend the globe or shade attaching means 21 and 22. The'lneans designated 21 may be in the form of screws that are threaded through bushings or eyelets 23 that are set within apertures of the flange 18. Said screws may be adjusted" to approximately center the neck 19 within the flange 18. Theattaching means to which the numeral 22 is generally applied comprises a plunger 25 that is guided 'within an aperture 26 of the flange 18 and in a hole in the outer end wall of a boxlike casing 27 that is suitably secured, through its flanged inner end, with the flange 18, as by means of rivets 28. The inner end portion of the plunger 25 is threaded for cooperation with anut 29 that is guided between the opposed walls of the casing 27 V and thus held against turning. in order to dispose the inner end of the plunger 25 in proper relation to the neck 19 the casing 27 is shown as inclined upwardly and outwardly to impart the same angular position to the plunger. A spring 30is compressed be tween the nut 29 and the outer end wall of the casing 27 and tends to urge the nut, along with the plunger 25, inwardly to engage the inner end of the plunger with the neck of the globe 20. The outer end of the plunger is provided with a head 31 by means of which the plunger may be retracted when inserting the neck of the globe in the flange 18 or withdrawing it therefrom or by means of which the plungermay be turned to adjust it within the nut 29.

,By reason of the fact that the plunger 25 attaching means 21 could be, and in some instances will be, fixed withrespcct to the flange 18, an obvious construction being to displace parts of said flange inwardly to form projections that would be received by the groove of the neck.

The particular globe shown in the drawings is the same as that disclosed in our previously mentio-ned application and is no part of our invention. As to contour, the

"globe is curved outwardly and downwardly below the neck 19 a suitable distance to a point designated by theline aa, and for a proper distance below this point to a point designated by the line bb it converges; and after bulging outwardly rather abruptly below the line Z)b the globe again converges to eifect a sort of semi-spherical shape. Above the line aa, and below the line Z)Z1, the globe-is translucent; while between said lines it is transparent or clear. This results in a sort of semi-indirect lighting effect, certain rays from the lamp being reflected downwardly by the portion of the globe above line aa through the clear portion between lines a-a and bb, while other rays filter through the translucent portion below the latter line. In a substantially horizontal direction, of course, direct rays escape through the clear portion of the globe. While it is desirable to soften the rays descending from the lamp through the translucent lower portion of the globe, too much filtering of the light is extravagant and objectionable and to increase the elliciency of the light penetrating the lower portion of the globe to a very considerable extent the inner surface of the part 16 is treated in the manner herein'cefore described. To obtain the desired high brilliancy of the reflecting surface, it may be silver plated and polished in the manner of finishing reflectors of such type. lVhile most of the light reflected by the part 16 falls through the translucent lower portion of the globe,'some of it will be reflected through the clear portion between the lines aa and Z2--b. Even greater eliiciency, and with it a glare which in some instances may be objectionable, is obtained when a shade is substituted for the'globe 20, such a substitution being so obvious as to require no further explanation or specific illustration. From the foregoing description it will be seen that our invention provides means for adjustably connecting a shade or globe to a lamp socket and which enables the shade or globe to be adjusted in order to obtain the desired relation between the shade or globe and the lamp without having to remove the shade or globe for the purpose. This greatly facilitates accomplishing correct adjustment because the results may be observed during the time the adjustment is being made. The same is true of the adjustment of the reflector 16 with respect to the lamp for the purpose of properly focusing the lamp with respect to the reflector. In certain of the following claims, lamp surrounding member is used as a term common to both shade and globe. Having thus described our what we claim is:

1. A fixture for use with an electric lamp socket whose lamp receiving end is of lesser diameter than the remainder of its body invention,

portion, the portion of greater diameter being surrounded by an enlargement; said fixture comprising a sheet metal sleeve member having portions spaced apart longitudinally thereof which are of different diameters, the portion of the smaller diameter being designed to fit about the larger end of the lamp socket in end-t0end engagement with the aforesaid enlargement, and the portion of larger diameter extending over but spaced radially from the lamp receiving end of said socket, the last mentioned portion being threaded, a second sheet metal sleeve member threaded on said portion of larger'diameter, means for attaching a shade or globe to the end of the second mentioned sleeve member remote from the lamp socket, the opposite end of said second mentioned sleeve member having the peripheral edge thereof deflected inwardly to prevent its passing over the threaded portion of the first men tioned sleeve member, and means for securing the first mentioned sleeve member to the lamp socket.

2. In combination, a pair of sleeve members, one adjustable with respect to the other, one of said sleeve members being adapted to support a shade or globe and the other of said members being adapted to fit about a lamp socket, a bail attached to the last mentioned member, said bail being provided with a notch adapted to receive the neck of said socket, and means for locking said bail to said neck.

3. In combination, a pair of sleeve members, one adjustable with respect to the other, one of said sleeve members being adapted to support a shade or globe and the other of said members being adapted to fit about a lamp socket, abail attached to the last mentioned member, said bail being provided with a notch adapted to receive the neck of said socket, and tongues formed on said bail and adapted to substantially close the notch thereby to lock said bail to said neck.

4:. In combination, a lamp surrounding member having a neck formed by an upwardly diverging wall, a supporting member having parts in opposed relation to the neck, means carried by said parts for interlocking engagement with the neck, one of said means consisting of a plunger the axis whereof is substantially parallel to said diverging wall, and further means yieldingly urging said plunger axially toward the neck.

5. In combination with a lamp surrounding member having a neck formed by an up wardly diverging wall, a supporting member having parts in opposed relation to the neck, means carried by .said parts for interlocking engagement with the neck, one of said means comprising a threaded plunger the axis whereof is substantially parallel to said diverging wall, a member through which said plunger is screwed so that the plunger may be adjusted with respect to the member, and means yieldingly urging said member in a direction to project the plunger axially toward the neck.

6. In combination with alamp surrounding member having a neck that is provided with an external groove, the top wall of which diverges upwardly, a support having a flange adapted to surround the neck, and a plurality of means carried by said flange and projecting into the groove of the neck, one of said means consisting of a threaded plunger, the axis whereof is substantially parallel to said diverging wall, a member through which said plunger is screwed for adjustment with respect thereto, and means yieldingly urging said member inwardly so as to project the plunger axially toward the neck. 7

7. I11 combination with a lamp surrounding member having a neck that is provided with an external groove, the top wall of which diverges upwardly, a support having a flange adapted to surround the neck, and

a plurality of means carried by said flange and projecting into the groove of the neck, one of said means consisting of a plunger having a threaded portion, a casing applied to the outer side of said flange, the flange and casing having, respectively, apertures in axial alignment, said plunger being guided within said apertures with its axis substantially parallel to the aforesaid diverging wall, a nut enclosed by the casing and restrained thereby from turning, the threaded portion of the plunger 00* operating with said nut, a spring surrounding the plunger and interposed between the nut and the opposite wall of the casing, and means for turning the plunger.

8. In combination, a lamp surrounding member having a neck that is provided with an external groove, a support for said mem ber having a flange surrounding'the neck, means spaced apart about said flange and having screw thread connection therewith for adjustment toward and from the neck, a part sustained by the flange and yieldingly urged toward the neck, and means having screw thread connection with said part for adjustment toward and from said neck independently of the movement of said part.

In testimony whereof, we hereunto affix our signatures.

WILLIAM L. KORNFELD. ARTHUR R. ENGLANDEB.

Images