US2115290A - Lighting fixture - Google Patents

Description

April 26, 1938. SQLQMON 2,115,290

LIGHTING FIXTURE Filed April 18, 1956 1 5 INVENTOR.

LOU/8 Solomon A TTORNEYS.

Patented Apr. 26, 1938 UNITED STATES PATENT OFFICE Application April 18,

1 Claim.

The invention relates to lighting fixtures and particularly to the kind known as ceiling fixtures. It has for its main object to produce a fixture which will give more light than the ordi- 5 nary fixtures now in use, and which will diffuse this light more evenly.

Another object is to provide a lighting fixture which may be adjusted for various sizes of electric bulbs. A further object is to provide a light 10 fixture which can easily be taken apart so that all the reflecting surfaces may be readily cleaned. A still further object is to provide a lighting fixture which will give no direct glare. Additional objects are to provide a lighting fixture 15 of simple but pleasing appearance, which is easy to install, which may be used in outlets of various types, and which can be manufactured at a relatively low cost.

These and various other objects and advan- 20 tages will be readily understood from the following description and from the accompanying drawing of preferred embodiments of the invention, in which, however, modifications may be made without departing from the scope of the 25 appended claim. In the drawing Fig. 1 is a cross-sectional elevation of the lighting fixture;

Fig. 2 is a cross-sectional elevation of a somewhat modified reflector used in the fixture;

Figs. 3 and 4 are fragmental plan views of the reflectors; and

Fig. 5 is a cross-sectional side view taken on line 55 in Fig. 3.

Referring now to the drawing, the device com- 35 prises a shade in which is secured to an electric attachment plug II in which the electric bulb I2 is inserted in the regular manner. The shade is formed with a parabolic part l3 near its upper end. Immediately below the shade flares out and 40 has a curved surface l4, while the lower end of the shade is provided with a downwardly and outwardly flaring skirt I5. A parabolic reflector l6, which in this case is illustrated as made of glass and silvered on the inner face I7, is se- 45 cured to the upper end l8 of the shade by means of a plurality of screws l9 which engage on a circumferential flange 20 formed on the upper end of the reflector.

As bulbs of various sizes may be used in this 5 fixture, I provide a sleeve 2! which is telescopically mounted on the part I 8 of the shade. This sleeve is provided with a plurality of slots 22 and with a plurality of screws 23 which are entered through the slots and threaded in bosses se- 55 cured on the shade. The slots 22 enable the sleeve to be raised or lowered in relation to the shade so that the bulb may be in the right focal position in relation to the reflector IS.

The sleeve is secured to the attachment plug 60 II by means of screws 24. In some instances I 1936, Serial No. 75,106

prefer to use a globe 25 in combination with the fixture. The shape of such a globe is plainly shown in Fig. 1 and it is secured to the fixture by means of a plurality of screws 26 whichare threaded in bosses secured on the shade. These screws engage on a flange 21 formed on the upper end of the globe. The lower part of the globe is preferably frosted so as to prevent direct glare.

While I have shown a reflector made of glass in Fig. 1, it is evident that metal reflectors, such as the one shown at 28 in Fig. 2, might be substituted. In fact in some cases it may be possible to use the inner surface of the part l3 of the shade as a reflector by plating this inner surface. made of glass or metal, it is preferable to make the reflecting surface undulated so that the rays impinging on the surface may be reflected in all directions. This may be done by forming a number of depressions, such as the diamond shaped depressions 29 shown in Figs. 3 and 5, or by making a number of circular depressions 30 in the reflector ISA, as shown in Fig. 4. In fact, undulations of any character may be employed to increase the efliciency of the reflector.

As the rays from the lamp impinge on the reflector they are bent in all directions by the undulations and reflected until they impinge upon the inner surface of the part l of the shade from which they are again reflected to light the place in which installed. Fixtures, constructed as here shown, have proved efl'icient in practice.

While I have shown the shade attached to a certain attachment plug it will, of course, be understood that it may be mounted on different forms of outlets, for example the shade might be connected directly to an outlet by having the screws of such outlet secured in the circumferential groove 3| formed in the sleeve 2|.

Having described the invention and its objects, what I claim as new and wish to protect by Letters Patent is:-

A lighting fixture comprising in combination, a circular shade provided with an electric lamp receptacle; a parabolic reflecting mirror contained in the upper part of .the shade; a lamp inserted in the receptacle with its light source substantially coinciding with the focal point of the parabolic mirror; the reflecting surface of the mirror undulated to reflect rays in all directions; a downwardly-extending and outwardlyflaring metallic skirt, formed at the lower part of the fixture, below the electric lamp for refleeting rays from the lamp and for rerefiecting some of the rays from the undulated surface of the mirror; and a globe attached to the shade co-extensive with the reflecting skirt, and enclosing the electric lamp.

LOUIS SOLOMON.

However, in all the reflectors, whether

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