US1560547A - Lighting fixture - Google Patents

Description

Nov. 10, 1925. Y 1,560,547

L. C. DOANE LIGHTING FIXTURE Filed July 26 1921 szyzszsrraa Luminy4 E. .ZYDANE,

Patented Nov. 10, 1925.

UNITED STATES PATENT OFFICE.

LEROY G. DOANE, OF CLEVELAND, OHIO,

ASSIGNOR, BY MESNE ASSIGNMENTS, TO

NEGTICUT.

-LreH'rING FIXTURE.

Application filed July 26, 1921. Serial No. 487,734.

Be it known that I, Lia-nov C. Doane, a. citizen of the United States, residing at Cleveland, inthe county of Cuyahoga, Sta-te of Ohio, have invented certain new and use- .ful Improvements in Lighting Fixtures, of which the following is a specification.

My invention relates to illuminating equipment and more specifically to colored illuminating equipment.

In display illumination such as used with show windows, bill-boards, etc., it is frequently desired to use colored light. It is also desired that the colored light may be changed at will with a minimum of inconvenience and expense. 'lhe use of colored lamps does not readily give the small conn sumer the range of color which is desired and is comparatively expensive as the use of `colored lamps introduces the color element in a renewal part. In the use of the usual color cap, all the light coming from the unit, of which the lamp is a part, does not pass through the color cap and a non-uniform color frequently results.

By means of my invention, all the useful light given off by the lighting unit is given the 4desired color. Moreover, the color elements are readily attached to the unit and are interchangeable so that various colors may be easily and quickly `secured, from the unit. To permit the light to be properly directed, I have provided a holding means for the reflector which readily permits the position of the reflector to be changed. y y

In the accompanying drawing, Fig. 1 is an elevation partially in section of a lighting unit embodying` my invention; Fig. 2 is a ton plan viewof the color holding means; and Fig. 3 is a modification of the color element holding means.

Referring to the drawing, the lamp socket 10 is carried on the conduit 11 which is mounted on any suitable support such as a wall or ceiling of a building. Attached to the lower part of the socket 10 so as to be capable of rotation about the socket is the `band portion 12 of the holder. Carried by the band portion 12 are a plurality of resilient supporting members 13 each of which has a projection 14 near the lower end thereof which serves to engage and position the `reflector 15 upon the seat formed by the ont wardly bent portion 16 of' the lower end of each member 13. The parts of the supporting members are so constructed and arranged that the rot-ation of the holder about the socket 10, the reflector being held from rotation, produces a change in the tilt of the reflector or, in other words, a change in the position or direction of the axis 17-17 of the reflectorl 15. This construction and arrangement, as shown, may be made by making equal the lengths of two of the three supporting members 13 between the band portion 12 and the reflector engaging Vnir-mns while making the similarly measured length of the third member 13 longer. It willv be apparent that, with such a construction, as the band portion 12 is rotated and the reflector is held from rotation, the reflector will be tilted. l

y The reflector 15 shown in the drawing is asymmetric. It has prisms 1S of the so-called stilleto type upon its outer surface and also has prisms 19 upon the screen portion 20. The bottom plane of the reflector is constructed at an oblique angle to the axis of the reflector so that the light is directed from the left hand side of the reflector (Fig. 1) in the direction of the right hand side of tln reflector in order to provide a greater inten sity of light on the right hand side or toward the back of the show window as the unit is ordinarily used. lVith the axis of the reflector vertical, the bottom plane of the specific reflector illustrated in Fig. 1 makes an angle of about ten degrees with the horlzontal. The specific holder illustrated has supporting members that hold the top plane `of. the reflector about liv-e degrees from the horizontal. The rotation of the holder with respect to the reflector causes the angle of five degrees .to be added to or subtracted from the ten degree angle made with the horizontal by the bottom plane of the reflector when the axis 17-17 is vertical. This is illustrated in Fig. 1 in which the lineA a'b represents the horizontal base line and the line ad@ represents the bottom plane of the reflector 15 when its ton plane is horizontal. When the reflector 15 is placed in the holding` means so that the'maximum-subtraction is made from the angle ba-c, the bottom plane is represente-d by the line a-Z and the angle thereof with the horizontal by the angle b---d as shown in Fig. 1. `When the maximum addition is made, the bottom of the reflector is represented by the line a-e which makes an angle b-a-e with the hori7ontal line.

An incandescent lamp 21 is placed in the socket 10 and a color element, consisting of an opaque or colored reflecting disc yor baffle 22 surrounding the neck of the lamp and a colored light transmitting bowl -or screen 23 which is placed around but preferably spaced from the lamp, is positioned to inclose Substantially all of the light emitting portion of the lamp'. The bowlor screen 23 has a bead 2l around the upper portion thereof which carries the disc 22 and which is engaged by the spring terminals 25 of the ends of the supporting members 13 so that the color element is supported below the reflector. The disc or baffle 22preferably completely coyers'the open end of the bowl 23 so as to prevent uncolored light from passing outwardly therefrom. yIf preferred, the disc may `be made light transmitting of the same color as the bowl. A cover cap 26 is mounted on the conduit 11 inclosing the socket 10, the upper part of the holding means and the bead 27 of the reflector 15.

The unit is assembled by attaching the band portion 12 of the holder to the socket l0, springing the supporting members 13 inwardly to pass through the aperture of the neck of the reflector 15 and releasing the members 13 so that the projections 14k` engage and hold the reflector 15 which is supported on the bent portions 16. The disc or baille 22 is then placed about the neck of the incandescent lamp 21 and the lamp inserted in the socket 10. The color bowl or screen 23 is now brought into holding engagement with the spring terminals 25 with the baille 22 resting upon the upper edge of the bowl v23. By bringing the cover cap 2G down over the socket and u per portion of the holder, the assembly o the unit is completed. lVith an opaque baffle 22, the color of light emitted bythe unit may be changed without disturbing the lamp 2l by detaching the color screen .J3 and substituting therefor a color screen of the desired color.

It should be obvious that the color element holding means may be separate from the reflector holdingmeans as shown in the modification of Fig. 3. In .this modification, a member '28 rests on the shoulder 29 of the reflector 30 and is positioned in the aperture of the reflector bythe projecting edge 31 forming part of the member 2S. The resilient spring supports 32 which arey attached to the member 28 engage the color screen 33 which carries the baille v34e to carry them properly positioned within the reflector and disposed about the incandescent lamp. The reflector is supported by any of the common supporting means such as the screws 35Vwhich engage the groove 36 around the shoulder 29 of the reflector.

What I claim as new and desire to secure by Letters Patent of the United States 1. In a lighting fixture for incandescent electriclamps, a reflector, an inclosing bowl and a holder comprising means for attachment to a suitable support and rotation thereon, a plurality of supporting members having means therein for engaging said reflector, and means on each of said supporting members for engaging said inclosing bowl below said reflector, said supporting members varying in length between-the attachment means and the reflector engaging means so that the rotation of the holder produces a change in the inclination of the axis of the reflector without affecting the other parts of the fixture.

2. In a lighting fixture, a light source, a reflector and means for attachment thereof to a suitable support and rota-tion thereon, a color elelnent substantially enclosing the light emitting portion of the source, meansl for engaging said color element comprising auxiliary means for supporting said reflector, the reflector being adapted to rotate between the holder and the auxiliary '7 engaging means to produce a change in the direction of the reflector without affecting the other parts of the fixture.

3. A lighting fixture consisting of a socket or other support and a holder comprising a metal clamping` band circling the saine and having depending therefrom a plurality of straps of different lengths having outward- 'ly extending portions near their lower ends and hook shaped portions at their lower ends, a shade or reflector resting on said outwardly extending portions anda globe supported by said hook shaped portions whereby a rotation of the holder permits a change in the inclination of the axis of the reflector without affecting the other parts of the fixture.

4. A lighting fixture consisting of a support and a holder comprising a member circling the same and having depending therefrom a plurality of straps of different lengths having outwardly extending portions neartheir lower ends and hook shaped portions at their lower ends, a shade 0r reflector resting on said outwardly extending portions and a globe supported by said hook shaped portions whereby a rotation of the holder permits a change in the inclination of the axis of the reflector without affecting the othei parts of the fixture.

5. Ina lighting fixturet the ycombination with a lamp and socket or other support of a metal clampingV band encircling the same and having depending therefrom a plurality of straps of different lengths having,` outwardly extending portions near their lower ends and hook shaped portions at their lower ends, a. shade or reflector restingl on said outwardlyextending portions and :i globe supported by seid hook shaped portions whereby the lmnp axis is not co4 incident with the axis of the globe and re- Hector.

6. In :i lighting fixture, the combination with :i lmnp and socket or other Support of u, member encircling the saine and having; depending' therefrom n plurality of straps of different lengths having outwardly extending portions near their lower ends and hook shaped portions :it their lower ends, a shade or reflector resting on said outwardly extending portions and it globe supported by said hook shaped portions whereby the lamp axis is not coincident with the axis of the globe and reflector.

In witness whereof, I have hereunto set my hand this 20th day of July, 1921.

LEROY C. DOANE.

Images