US1962068A

US1962068A - Lighting fixture

Info

Publication number: US1962068A
Application number: US676602A
Authority: US
Inventors: Edwin F Guth
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-06-20
Filing date: 1933-06-20
Publication date: 1934-06-05
Anticipated expiration: 1951-06-05

Description

`lune 5, 1934. E F GUTH 1,962,068

LIGHTING FIXTURE Filed June 20. 1933 2 Sheets-Sheet 1 F/G. l

INVENTOR @WLM/JM June 5, 1934. E. F` GUTH 1,962,068

LIGHTING FIXTURE Filed June 20. 1935 2 Sheets-Sheet 2 F/G. Z

INVENTOR BYoJn/J M TORNEY Patented June 5, 1934 UNITED STATES PATENT oFFiicE 4 Cairns.

My invention relates to that class of lighting fixtures which are termed indirect lighting fixtures. It iS well known that while total indirect lighting is the most desirable form of 5; lighting for the eyes, it is also well known and frequently commented upon by those who are familiar with the art that it results in the production of a hollow appearance of a room which is lighted by total indirect lighting.

The result of this has been that it has been necessary to provide some means of overcoming this objectionable appearance. In some instances the indirect type of illumination has been combined with direct illumination and in other cases the refiector has been entirely cut away and an enclosing translucent bowl employed. This has the effect of `overcoming entirely the results of total indirect illumination but is also wasteful in current and is objection- 29 able because placinga translucent bowl immediately below the present high power gas filled lamps produces glare and excessive brightness in spots.

My invention has for its object to avoid the foregoing objectionable features and to provide a fixture in which the desirable feature of indirect illumination are obtained and the hollow appearance is overcome without a sacrifice of efhciency in which only a very small part of the light flux is used` to illuminate a translucent bowl secured to the bottom of the reflector.

My invention has for its further object to provide means for illuminating this glass bowl without any glare or any spotted appearance caused by the impingement of direct rays of light upon the interior of the bowl surface.

My means of accomplishing the foregoing objects may be more readily understood by having reference to the accompanying drawings which 40, are hereunto annexed and made a part of this specification, in which- Fig. l is a side View partly in section showing my improved construction;

Fig. 2 is a similar view showing a different form of bowl; and similar reference numerals refer to similar parts throughout the entire description.

As shown in the drawings, the fixture is shown suspended from a standard stem or support 1,

which extends to a canopy 2 which encloses the 6 although obviously any suitable or desired form of support may be employed. The reiiector consists of a bottom 7 and sides which are outwardly and upwardly. The inner surface of this reflector being formed into a reflecting sur face either by the use of porcelain enamel or any other suitable and efficient means of forming a diffuse reective surface upon metal. In the bottom 7 of the reiiector 5 I form a plurality of perforations 8 through which either direct or diiusely reflected rays of light'rnay pass. A bolt 9 is mounted in the center of the bottom of the reflector and supports a translucent bowl 1i) by means of a nut l1 mounted upon 'threads cut upon the lower end of the bolt 9. The translucent bowl 10 is provided with an inwardly eX- Vtending edge 12 which extends inwardly a sufficient distance to entirely close the openings or perforations 8 formed in the bottom of the reliector.

The result is that the impinging of the light rays on this translucent material produces a diffuse reflection so that the light rays are spread evenly over the entire interior of the translucent bowl l0, with the result that all glare is eliminated and the spotted appearance which is so obj ecticnable is entirely overcome.

In Fig. 2 I have shown a variation of this construction in which the translucent bowl 2f) is provided with a vertical cylindrical side wall 21 which abuts the outer surface of the bottom of the reflector. In this form of construction I provide a plate 22 of translucent material which is suitably secured, by means of a washer 23 which may be secured to the bolt 9 and in any suitable or desired manner. This plate is of suiiicient diameter to entirely close the perforations or openings 8 in the bottom 7 of the reflector 45. This may, in some instances, be found to be a cheaper form of construction.

It will be apparent from the foregoing description that I have provided a form of construction in which I utilize to advantage all the desirable features of indirect lighting without any of the objectionable ones and that I overcome the ob- Bfr jectionable features without material loss of extends beyond said perforations, and means to hold said bowl with its peripheral edge tightly against the outer edge of the bottom of said reflector and below said perforations.

2. The combination with an opaque reflector having a closed bottom and sides, said sides flaring upwardly and outwardly, there being a plurality of perforations in the bottom of said reflector, a translucent bowl, a translucent closure for said perforations, said closure comprising a plate of translucent material secured to the bottom of said reflector and having its periphery extending beyond said perforations, and means to hold said bowl and plate firmly and securely in position against the outer edge of the bottom of the reflector and below said perforations.

3. The combination with an opaque reflector having a at closed bottom and sides, said sides flaring upwardly and outwardly, there being a plurality of perforations in and near the outer edge of the bottom, a translucent bowl, the edge of said bowl extending inwardly in contact with the flat bottom and covering said perforations, and means to hold said bowl tightly against the bottom of said reflector and below said perforations.

4. The combination with an opaque reflector having a closed flat bottom and sides, said sides flaring upwardly and outwardly, there being a plurality of perforations in the bottom of said reflector near the periphery thereof, translucent means including a bowl portion and partial covering means therefor, and supporting means securing said translucent means to and in contact with the flat bottom of the reflector; said covering means being in the plane of the upper edge of the bowl portion and covering the perforations in the bottom of the reflector.

EDWIN F. GUTH.