US2107028A - Direct lighting fixture - Google Patents

Description

Feb. 1, 1938. c. DOANE DIRECT LIGHTING FIXTURE Filed Feb. 6, 1936 INVENTOR ZERO) C. Don/vs ATTORNEY Patented Feb. 1, 1938 UNITED STATES 2,107,028 DIRECT LIGHTING FIXTURE Leroy 0. Duane, Meriden, Conn, assignor to The Miller Company, Meriden, Conn., a corporation oi Connecticut Application February 6, 1936, Serial No. 62,601

9 Claims.

The present invention relates to direct lighting fixtures and more specially to direct lighting fixtures employing two light sources.

The present invention contemplates a lighting fixture adapted to use incandescent lamps and mercury vapor lamps, both burning in pendant positions.

As the heat generated by the operation of 1 all these lamps is considerable, it has been found necessary to take special precautions to properly cool the lamp sockets and the upper part of the vapor lamp so as to secure proper operation for the vapor lamp.

The present invention therefore provides a holder for the lamp bulbs and sockets having suitable ventilation features whereby the heated air is dissipatedwithout causing an undesirable rise in temperature of the holder and parts carried thereby.

In effecting the control of the heated air rising from the lamp bulbs, the present invention makes use of a bafile apertured to receive the lamp bulbs and held in a holder in such a way as to permit the hot air to spill around the edges of the baflie and pass into the upper part of the holder, this part being skeletonized so that the hot air readily escapes to the outside atmosphere. The accompanying drawing shows, for purposes of illustrating the present invention one of the many embodiments in which the invention may take form, it being understood that the drawing is illustrative of the invention rather than limiting the same.

In the drawing:

Fig. 1 is a vertical sectional view of a direct lighting fixture on the line l-l of Figs. 2 and 3, with parts in elevation and parts broken away;

Fig. 2 is a sectional view on the broken line 2-2 of Fig. l, with parts in elevation;

Fig. 3 is a section taken on the line 33 of Fig. 1 looking in the direction of the arrows;

Fig. 4 is a perspective view of the holder and bulbs, the enclosure being omitted; and

Fig. 5 is a fragmentary vertical section on the line 5-5 of Fig. 3. r

The fixture shown herein is adapted to be supported in a pendant position by a pipe, conduit or other support H). The holder 55 in Fig. 2. The holder is provided with down- I I is. threaded onto this pipe and supports the fixture.

wardly extending straps or ribs l6, I1, I 8, all of which support a lower annular large diameter skirt portion IS. The holder is preferably in the form of a casting.

A central pendant lamp socket 20 is secured in the upper part of the holder and adapted to be connected by wires indicated at 2| with a current source. This socket supports a pendant mercury vapor lamp 22 whose electrodes are indicated at 23 and 24. The fiat portion ll of the holder supports three lamp sockets 25 which carry incandescent lamp bulbs indicated at 26.

The incandescent lamp sockets 25 are connected to wires 21 passing through an annular wireway, as indicated at the right of Fig. 1. These wires are held in place by narrow segments 28 secured to the lower face of the holder by screws 2 9. The ends of the segments are spaced, as indicated at 30, Fig. 2, to facilitate the wiring, and the ends of the segments are held in place by the lamp sockets.

The upper portion of the current supply wires for the incandescent lamps is indicated at 3|. They pass down through a channel-shaped rib 32 and are held in place by a cover indicated at 33. The ends of this cover are bent, as shown in the drawing, and the cover is held in place bythe sockets.

The vertical ribs l8 are made thick, as indicated at the left of Fig. 1, while the ribs l6 and I! are thinner. These thick ribs provide inwardly extending lugs 34 which are tapped to receive screws 35. These screws support a baflle plate 36. The outer edge of this baflie plate is indicated at 31, and it will be apparent from the drawing that the edge of the plate is spaced from the walls of the holder so as to form channels or vents for the escape of the heated air.

The straps iii are apertured, as indicated at 40, to receive the upper ends of hook members M. The lower ends of these hook members are indicated at 42, and they are adjustably secured in place by thumb screws indicated at 43. The peripheral flange on the baflle plate 36 is notched to accommodate these screws.

The straps 4| form a convenient shade support for securing any form of enclosing shade about the bulbs. This shade may be merely an all-metal reflector of any desired shape, or may be combined diffusing glass enclosing globe, as indicated at 45 and metal reflector indicated at 46. Whatever form of enclosure is employed, it has a tendency to confine the heat generated by the lamps and to make it necessary to ventilate the holder. The heated air will pass up through minimum heating of the sockets, wires and terminals and of the upper part of the mercury vapor lamp. The lamp can be kept cool enough to properly function.

It is obvious that the invention may be embodied in many forms and constructions within the scope of the claims, and I wish it to be understood that the particular form shown is but one of the many forms. Various modifications and changes being possible, I do not otherwise limit myself in any way with respect thereto.

What is claimed is:

l. A direct lighting fixture comprising a central downwardly opening lamp socket, a pendant mercury vapor lamp carried therein, a plurality of downwardly opening lamp sockets circumferentially disposed below the central socket, incandescent lamps in the latter mentioned sockets, a common support for all the sockets, said support being in the form of a skeletonized holder to provide ventilation about the sockets, a lamp enclosing member carried by the holder and disposed about the lamps to cause air heated thereby to pass upwardly through the member and the holder, and a baille plate mounted below the sockets and apertured to receive the upper portion of the lamps and having its edge spaced from the holder to provide a peripheral ventilation space whereby the heated air within the member is diverted from the upper end of the vapor lamp and its supporting socket, andpasses out through the holes of the skeletonized holder.

2. In a direct lighting fixture, a downwardly opening central socket, a plurality of downwardly opening sockets spaced circumferentially outside and below the central socket, an annular downwardly opening socket holder to which all the sockets are secured, the holder being skeletonized to afford free escape of heated air and having a skirt about its lower edge, lamp bulbs in the sockets, a partition wall across the holder below the sockets and above the skirt, the wall being apertured to receive the upper portions of the lamp bulbs and of smaller diameter than the holder to facilitate escape of air upwardly between the edge of the wall and the holders, and a lamp enclosing member secured to the skirtof the holder.

3. In a direct lighting fixture,-a pendant mercury vapor lamp, a supporting socket, a socket holder, a horizontal plate apertured to receive the vapor lamp and disposed above the upper electrode of the vapor lamp, a plurality of circumferentially disposed lamp sockets carried by the holder below the first socket and above the plate, incandescent lamps therein, the necks of these lamps passing through apertures in the plate, the peripheral edge of the plate being spaced from the lower portion of the holder to facilitate the e of heated air up betweui the edge of the plate and the holder, the holder being provided with large ventilation apertures above the edge of the plate to facilitate escape of heated air from the fixture, and a lamp enclosing member supported from the holder.

4. In a direct lighting fixture, a holder having an upper small diameter portion and a lower large diameter .portion, both portions being provided with large ventilation openings to allow free fiow "of air, a central downwardly opening'socket in the upper portion, aplurality of downwardly opening sockets in the lower portion, a partition wall supported below the sockets and apertured for lamp bulbs carried in. the sockets, a mercury vapor lamp in the first socket, incandescent lamps in the other sockets, the edge of the partition wall \being spaced from the holder to provide peripheral air vents.

5. In a lighting fixture, a socket holder having upper, intermediate and lower annular portions interconnected by spacing libs which provide laterally opening ventilation openings, a central socket secured to the upper portion, a plurality of sockets secured to the intermediate portion, an apertured plate secured to the lower portion with its edges spaced therefrom to provide peripheral air vents, and socket supported lamps projecting through the apertures in the plate.

6. A lighting fixture such as claimed in claim 5. wherein the intermediate portion of the holder is flat and provided with ventilation apertures.

7. A lighting fixture such as claimed in claim 5, wherein the holder has an annular wire receiving channel for the lower sockets and a cover for said channel. v

8. In apendant lighting fixture, a holder having an annular shade receiving skirt, internally disposed lugs spaced above the lower edge of the skirt, an annular baffle plate fitting the lugs and spaced from the holder walls to afiord' vents, means to secure the baifle plate in place, shade supports carried by the holder, sockets above the plate, and bulbs in the sockets projecting through apertures in .the plate, the holder being skele, tonized above the plate to prevent hot air accumulating about the sockets.

- 9. In a lighting fixture, a downwardly opening stepped, bell shaped holder having an upper small diameter portion, a central socket carried thereby, an intermediate, fiat portion connected to the

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