US1998573A - Indirect lighting fixture employing ultraviolet and incandescent lamps - Google Patents

Description

April 23,1935. L, c, DQAN'E 1,998,573

INDIRECT LIGHTING FIXTURE EMPLOYING ULTRAVIOLET AND INCANDESCENT LAMPS Filed Jan. 15, 1951 INVENTOR Ler'o C Doane BY y ATTORNEY Patented Apr. 23, 1935 -umrso STAT-E I-PATENVT OFFICE INDIRECT LIGHTING FIXTURE EMPLOY? ING ULTRAVIOLET ANDYVINGANIDESCENT i Leroy C. Doane, Meriden, Conn., assignor tolThe Miller Company, Meriden, 001111., a corporation of Connecticut I Applicationlanuary 15, .1931, Serial. No. 508,837

Claims. (015240-78) (except for'intensity of light) when both types of ilampare lighted or when one only is used.

The present invention contemplates a fixture adapted'to' employ a pendant or substantially,

pendant glow lamp, such as the mercuryarc glow lamp, and wherein'a' number of upwardly extending incandescent lamps, together with the glow lamp, are shielded or screenedby reflecting imeansadapted to upwardly direct light from both types of lamps onto a single reflecting surface Tforming, what may 'be'termed, an artificial ceiling adapted to distribute both ultraviolet and *visible light. I The'invention also contemplates the utilization of a small amount of the light from the glow lamp or the incandescent lamp for illuminating the under surfaces of the reflecting meansabove referred to;

"The inventionalso contemplates an improved fixture arranged for both types of illumination wherein the parts are arranged for convenience in relamping, cleaning and disassembling. "Afurtherobject of the invention is to provide "a design for a fixture for totally indirect lighting inwhich the light controlling parts are suscepti- 'ble of interchangeable use with all'the lamps of the incandescent type or with one of the lamps -of the glow type. 7 Other and further objects of the inventionwill appear as the description proceeds.

The accompanying drawing shows, for purposes of illustrating the present invention-one form in'which it may take form; it being understood that the drawing is illustrative of the invention rather than limiting the same.

In the drawing:

Figure 1 is a side elevational view of a lighting fixture with parts in section;

Figure 2 is'a top plan view of the lower reflector; a

Figure 3is a section taken on the line 33 of Figure l; and V Figure 4 is a diagrammatic side elevational view.

In the form of construction shown in Figure 1 the fixture is supported from above by a rod or pipe I9 secured'to a cross strap H by a nut inof two stampings dicated at 12c transformer l3. Across strap l5'is secured to the lower sideof the transformer-and this cross strap-carriesa'tubular socket cover It and lamp socket ll of the type adapted for holding a mercury vapor glow lamp indicated at It.

1 The end ofthe socket cover I6 is threaded as indicated-at) a ring 20 is threaded onto the socket cover; The ring 20 supports anupwardlyand outwardly fiaringasheet metal reflector 50, preferably Y made of aluminum having an oxidi aedsurface. "'T-his reflector may be made aand' 50b, as indicated, and isadapted to extend upwardly and outwardly to provide a comparatively large artificial ceiling for the fixture. It may be mounted directly against theceiling if desired. It may be solely supported by the ring20'so as to be easily removable for shipment.

' 'The stamping 5D is provided with three downwardly and outwardly extending legs 5|, more or less ornamental in shape. These legs are secured to a reflecting member 52, preferably in the form of an aluminum casting, shaped asindicated in Figures land 2. This casting has a central, downwardly extending. pocket 53, preferably provided with a removable sheet metal aluminum liner ori reflecton 54 having an oxidized surface to upwardly reflect light received from the glow lamp. The casting 53, as here shown, has three pockets 55. These pockets, as well as the central pocket 53, have openings as indito'carry lamp sockets 58 as indicated] These lamp sockets are concealed by ornamental covers fisspaced slightlyfrom the casting, as indiby stray light. The strap 5] under the center opening fit is secured toa slightly larger bellshaped cover member 66 which is adapted to receive a small amountof stray light from the glow lamp transmitted through the openings 5| in the reflector 54 to therebyilluminate the under surface of the casting 52.

In order that the lower reflector may be readily lowered to permit access to the glow lamp,.as

Well as to facilitate removing the incandescent lamps and cleaning the'refiecting surfaces, the lower ends of two of the arms 5| are preferably secured to the'casting 52 in a readily detachable X manner. Screw-eyes'62 are threaded into the Thiscross strap H supports -'a v cated-at 56; Stra'ps51 extend downwardly un- V dernea'th these openings, as shown. The three -'straps'underneath the openings 56 are adapted lower casting. They carry wire rings 63 adapted to receive the lower ends 64 of the supporting legs. The arrangement permits holding the parts in suspended position, as indicated in full lines in Figure 4.

The wiring of this fixture may include a pull chain switch 19 supported from the transformer and having two circuits, one of which controls the current for the transformer and glow lamp, while the other controls the current for the in candescent lamps. The incandescent lamp circuit may include a convenience outlet indicated at l i, an attachment plug cap 12, and a length of wire indicated at 13 which extends downwardly through a suitable hole in the stamping and underneath the supporting strap 5|. The lower ends of the cord 13 are provided with receptacles 14 adapted to be received on pins 15 secured to the casting 52 and connected to the various lamp sockets for the incandescent lamps. The arrangements above described make it possible to disconnect the casting 52 and its lamps both electrically and mechanically from the support.

It is, of course, obvious that one can omit the incandescent lamps and associated parts where a single ultraviolet source is desired and that the same arrangement of light controlling parts may be used with a centrally disposed incandescent lamp where ultraviolet light is not required but similarly appearing fixtures are desired.

Certain features of constructionshown herein are claimed in my application for Direct lighting fixtures employing ultraviolet and incandescent lamps, Serial No. 508,838, filed concurrently herewith.

I claim:

l. A lighting fixture comprising a fixture body having a central upwardly opening pocket and a plurality of outer upwardly opening pockets, a reflector extending upwardly and outwardly from above the central pocket, the outer pockets having openings therein, upwardly opening lamp sockets supported below said openings, lamp bulbs carried in said sockets with their light sources in the pockets, socket covers about the sockets and spaced from the lower side of the plate to allow stray light to escape and illuminate the lower side of the plate, and an additional light source in the central pocket, the pockets acting to screen oif the light sources and redirect light upwardly onto the reflector.

2. A lighting fixture comprising a fixture body having a central upwardly opening pocket and a plurality of outer upwardly opening pockets, a reflector extending upwardly and outwardly from above the central pocket, light sources in each of said pockets, the pockets acting to screen off the light sources and redirect light upwardly onto the reflector, the central pocket having an opening therein, and a shade supported below the central pocket in a position to reflect light onto the outside of the central pocket to illuminate the same.

' 3. A lighting fixture having a. single upwardly and outwardly flaring reflector symmetrical about a vertical axis, a single axially disposed lamp below the reflector, the reflector being concave to incident light to widely spread the light, a plurality of off center lamps adjacent the axially disposed lamp, a reflector for upwardly reflecting light from all the lamps, the reflector having openings to permit the escape of light downwardly, and supplemental reflectors below the openings for returning this light upwardly to illuminate the outside of the reflector.

4. A lighting fixture comprising a lamp bulb,

bulbs supported below the flaring reflector and screening and reflecting means for screening ofl the plurality of lamps and reflecting light there- 'from upwardly onto the flaring reflector.

5. A lighting fixture comprising an upper reflector symmetrical about a vertical axis and flar-' ing upwardly and outwardly from adjacent said axis, a lower reflector member having a pocket below the center of the upper reflector and a pluralityof off center pockets, means for detachably supporting the member from the upper reflector and carrying a lamp in the central pocket, a plurality of lamp sockets supported from the member, and lamps in the latter mentioned sockets carrying their light sources in the outer pockets, the upper reflector receiving direct and reflected light from the light sources and the mem ber.

6. A lighting fixture comprising an upper reflector symmetrical about a vertical axis and flaring upwardly and outwardly from adjacent said' axis, a lower reflector member having a pocket below the center of the upper reflector and a plurality of off center pockets, mounting means for supporting the lower reflector member in horizontal position or in hanging position, a central socket in fixed relation to the upper reflector and carrying a lamp in the central pocket, and a plurality of lamps carried in lamp sockets secured to the lower reflector member with their light sources in the outer pockets, the latter mentioned lamps being held underneath the upper reflector and concealed from view when the lower reflector member is horizontal and all the lamps being accessible when the lower reflector member is in hanging position.

7. A lighting fixture comprising a central support, a downwardly opening lamp socket at the lower end of the central support, a pendant bulb therein, an upwardly and outwardly flaring reflector adapted to receive upwardly directed light from the pendant bulb, supporting means for the reflector, a lower reflector supported from the upper reflector and spaced therefrom to accommodate the pendant bulb and reflect light therefrom onto the upper reflector, the lower reflector also carrying a plurality of lamp bulbs and reflecting light therefrom onto the upper reflector.

8. A lighting fixture having a substantially pendant glow lamp adapted to emit both ultra violet and visible light, a plurality of incandescent lamps, reflecting means below each of the lamps for screening the same and reflecting light therefrom upwardly, and a single reflector superposed above the lower reflector and receiving diect and reflected light from both types of lamps and returning the same downwardly, the lower reflector being supported by means which permit lowering it to give access to all the lamps.

9. In an indirect lighting fixture, a fixture body having a central and a plurality of outer pockets, all the pockets being upwardly opening and apertured, lamp sockets supported below'the outer pockets, lamp bulbs in the sockets, the lamp bulbs extending through the apertures in the pockets so that the bulbs are in the pockets so that the pockets reflect light upwardly, and covers for the sockets and lower parts of the lamp bulbs, the covers being spaced from the reflector to permit stray light to illuminate the outside of the plate.

10. An indirect lighting luminair comprising a centrally disposed light source, a reflector below the light source for intercepting substantially all the light emitted in the lower hemisphere and directing it upwardly and outwardly for indirect lighting, a plurality of independent light sources mounted outside of the said reflector, opaque and reflector having openings to allow a small proportion of the light to pass downwardly, and supplemental screens for intercepting such light and returning it into the outside of the screens for illuminating the same.

LEROY c. DOANE.

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