US1977401A - Lighting fixture - Google Patents

Description

Oct. 16, 1934. IR. oRTH LIGHTING FIXTURE Filed Jan. 20. 1933 ATTORN EY Patented Oct. 16, 1934 LIGHTING FIXTURE Richard cia., Philadelphia, Pa., assignor to Gill Glass & Fixture Company, a corporation of Delaware Application January 20, 1933, Serial No;`652,648 I oiaimg.A (ci. 24o-78) The present invention relates to lighting xtures.

Lighting units of the type employing a single light bulb are generally provided with a pend- 5 ant lamp socket about which is placed Van opaque -socket lcover designed to conceal the socket. As this socket cover is opaque, it tends to cast a shadow on the ceiling. It appears dark and uninteresting when the iixture is l() viewed from the side.

The present invention contemplates a lighting xture having a diilusing socket cover preferably made of material which is optically similar to the material of the shade employed for screening oft direct light at the ordinary angles of observation.

By employing a luminous socket cover one obtains a fixture having a much improved appearance, especially inasmuch as the socket 2Q cover and shade may have substantially the same intensity of light so that the observer receives the impression of a single light source extending from the bottom to the top of the xture. Furthermore, the employment oi a diffusing socket cover tends to reduce the shadow and provide more even ceiling illumination.

Other and further objects oi the invention will appear as thedescription proceeds.

The accompanying drawing shows, for purposes of illustrating the present invention, tWo

oi 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 sectional View with parts in elevation showing a pendant lighting fixture;

Fig. 2 is a sectional View taken in the direction of the line 2-2 oi Fig. 1; Fig. 3 is a perspective View of the lighting fixture illustrating the contrast of the lighted fixture against a background; and

Fig. 4 is a sectional view of a modified construction:

In the embodiment shown in the drawing, the

455 lighting iixture or luminair is shown as a pendant semidirect lighting xture intended for the lighting oi offices and the like. It may, however, be used as an indirect lighting iixture or the parts may be inverted and embodied in a lamp.

A wire carrying stem is indicated at 10. This stem is secured to a lamp socket 11 in any convenient manner, and, as here shown, carries an annular member 12 of somewhat larger diameter than the lamp socket. The lamp bulb 13 is carried in the socket in the usual manner. The member 12 is drilled to receive twoup- Wardly extending threaded members 14 and 15l carried by a ring 16. This ring is adapted to pass by the lamp socket and is of slightly larger outer diameter than the member 12; The ring may be supported in position by nuts indicated at 17. A socket cover 20, preferably made of comparatively dense diffusing glass, is held in place by the ring 16. Felt washers 21 may be employed if desired. This arrangement provides for clamping the socket cover securely so as to prevent rattling.

The ring 16 carries a shade support in the form of a harp 22, as indicated. The lower end of this harp carries a threaded stem 23 adapted to receive a shade 24 and a securing nut 25. This shade is preferably made of diffusing glass. It may be decorated or rendered more or less opaque, if desired. The shade is preferably clamped against washer 26 and is therefore held securely in place below the lamp bulb. A iinishing member 27 may be held on the lower end of the stem 23 by an ornamental nut 28.

It will be noted from the drawing that the lower edge 29 of the socket cover is in substantially the same plane as the upper edge 30 of the shade 2e, so that the bright light source is not in the range oi vision when the fixture is viewed from ordinary angles of observation. Where the shade and socket cover are made of glass of about the same optical characteristic, one sees a fixture such as indicated in Fig. 3. The

kentire shade and socket cover appear luminous and one receives the impression that there is but one piece of glass. The iixture may be easily taken apart for re-lamping and cleaning.

Fig. 4 shows a slightly modified form of construction according to which a glass cylinder 40 is supported on a shade holding device el formed out of bent straps. This socket cover will appear luminous when the lamp bulb is lighted.

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 forms shown are but two of the many forms. Various modications and changes being possible, I do not other- Wise limit myself in any way with respect thereto.

What is claimed is:

1. A luminair having a lamp socket, a lamp bulb carried thereby, a diiiusing socket cover about the socket and neck of the lamp, and an upwardly opening translucent shade of substantially larger diameter than the socket cover, the upper edge of the shade and the lower edge of the socket cover being in substantially the same plane, the lament of the bulb being substantially below the upper edge of the shade, so that direct light is emitted through a predetermined zone and sothat thev lamp bulb is screened against direct observation throughout other afngies, a socket cover support, and a shade support carried by the cover support and extending down through the socket cover and about the bulb.

2. A luminair having a lamp socket, .a light source in the form of an incandescent lamp bulb carried thereby, a diiusing socket cover about the socket and neck of the lamp for intercepting light emitted in the general direction of the socket and through a predetermined vangle from the axis of the bulb, and a shade about the bulbous portion of the lamp bulb, the shade being made of material optically similar to that of the socket cover whereby the shade and cover appear integral when viewed from an angle outside the zone of duect light and whereby diiused light from both diflusers is available; said shade having a free edge of substantially larger diameter than the socket cover, and approximately lin the plane of the socket cover edge, whereby direct light and light reflected by the shade is emitted through a zone outside Vthe socket cover and direct light is cut oilc at angles beyond said zone.

3. A lighting fixture comprising a lamp socket, a lamp bulb carried thereby, a member to the rear of the socket andl of larger diameter than the socket, a tubular diffusing glass socket cover having an inwardly extending ange adjacent said member, and means for securing the flange to the member.

4. A lighting fixture comprising a lamp socket, .a lamp bulb carried thereby, a member to the rear of the socket and of larger diameter than `the socket, a tubular diffusing glass socket cover having an inwardly extending flange adjacent saidmembenaring inside the socket cover, and means for detachably securing the ring to the .member so as to support the socket cover.

5. A lighting fixture comprising a lamp socket, a lamp bulb carried thereby, a member to the rear of the socket and of larger diameter than the socket, a tubular diffusing glass socket cover having an inwardly extending arige adjacent said member, a ring inside the socket cover, means for detachably securing the ring to the member so as to support the socket cover, a shade holder carried by the ring and extending 'beyond the lamp bulb, and a'shade carried by theY 'free end of the shade holder.

- RICHARD ORTH,

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