US1652416A

US1652416A - Lighting apparatus

Info

Publication number: US1652416A
Application number: US22336A
Authority: US
Inventors: Schepmoes Lindsley
Original assignee: Safety Jar Heating & Lighting
Current assignee: Safety Jar Heating & Lighting; Safety Jar Heating & Lighting Co
Priority date: 1925-04-11
Filing date: 1925-04-11
Publication date: 1927-12-13
Anticipated expiration: 1944-12-13

Description

Dec. 13, 1927.

| SCHEPMOES I LIGHTING APPARATUS Filed April 11, 192.5

INVENTOR Patented Dec. 13, 1927.

UNITED STATES PATENT OFFICE.

LINDSLEY SCHEPMOES, OF NEW HAVEN, CONNECTICUT, ASSIGNOB TO THE SAFETY JAB HEATING 8c LIGHTING COMPANY, A CORPORATION OF NEW JERSEY.

LIGHTING APPARATUS.

Application filed April 11, 1925. Serial No. 22,336.

This invention relates to lighting apparatus and more particularly to reflectors for use with electric lamps.

One of the objects of the invention is to provide apparatus of the above nature practical and eflicient and adapted to meet the requirements of practical use in a highly satisfactory manner. Another object is to provide a reflector construction which efliciently utilizes the light and effects a pleasing illumination free from undue glare. Another object is to provide a reflector wherein an effective shielding of the filament, particularly of electric lamps having a concentrated filament, is accomplished without appreciable waste of'light. Another object is to provide a construction of the above nature which is simply made and inexpensive, and at the same time strong and durable; Other objects will be in part obvious or in part pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations of elements, and arrangements of parts as will be exemplified in the structure to be hereinafter described and the scope of the application of which will be indicated in the following claims.

In the accompanying drawing, in which is shown one of thevarious possible embodiments of this invention,

Figure 1 is a side view, partly in elevation and partly in section, showing a reflector in use, and

Figure 2 is a top plan view on a smaller scale. 4

Similar reference characters refer to similar parts in both views of the drawing.

Referring now to the drawing in detail, this reflector is open at'its upper end about which it is provided with a suitable rim 10 for attachment to any type of supporting light fixture such as indicated at The rim 10 is supported about an electrlc llght socket 12 from which depends an electric lamp 13.

The reflector at any horizontal plane therethrough is substantially circular, as indicated in Figure 2. From its upper securing rim 10, the'sides of the reflector curve outwardly and downwardly about the lamp 13 with increasing pitchuntil the point 14 is reached, at which point the diameter of the reflector is greatest. From this point 14 the sides curve downwardly and inwardly to the lower end 15 and the open mouth of the reflector. The mouth is thus of substantially smaller diameter than the greatest diameter of the reflector which occurs at the plane of the point 14. It will be seen that the reflector is thus what may be termed substantially pear-shape. The lamp 13, depending from the socket 12, is positioned well up within the reflector, being spaced above the point 14 of largest diameter.

Referring to the left-hand side of Figure 1 of the drawing, the upper portion of this reflector above the line 16 is seen to comprise three layers of material, and the portion below the line 16 to comprise two layers of material. The body 17 of the reflector is formed of clear glass. On the outer surface of this body above the line 16 is formed a covering or casing 18 which is of a heavy density opal glass. The entire inner surface of the body 17 is coated with a covering.19 which comprises a thin layer of light density opal glass. The heavy density outer covering 18 acts as a reflector and the light inner covering 19 acts as a diflusing medium for the light rays emitted from the lamp 13. I

The lamp 13 is of a type having a concentrated filament 20, and it is with this type of electric lamp that the reflector of this invention is particularly adapted to cooperate. It will be seen that the filament 20 is positioned well up within the reflector andv Rays passing through the glass below the line 16 are difi'used by the diffusing covering 19 and thus undue glare is avoided. Moreover, the rays reflected from the reflecting covering 18 are diifused by the covering 19 through which they pass to reach the reflecting surface. light rays reflected from the covering 18 and thrown therefrom downwardly and outwardly through'the partof the reflector beneath'the line 16. I

The portion of'the reflector beneath the The

lines

23 and 24 represent line 16 is preferably provided with optic ribbing 25 of plain glass raised from the surface of the body 17. These ribs 25 are smoothlyrounded, free from sharp corners, and preferably raised substantially to a level with the surface of the covering 18 on the upper part of the reflector. These ribs add to the appearance of the reflector, and at the same time assist in the dil'l'usion of light rays passing through the lower portion of the reflector.

From the above it will be seen that there is herein provided a reflector construction which is highly eflicient in the utilization of light, and which at the same time avoids to a great extent the objectionable glare ordinarily caused by an electric lamp having a concentrated filament. The filament is effectively shielded except from a very small area, and yet the light is not wasted but efliciently utilized to effect a pleasing and ctlicient illumination. Thus, there is provided a construction which embodies the features of this invention and attains the objects thereof, including many important and practical advantages.

As many possible embodiments may be made of the above invention. and as many changes might be made in the embodimentabove set forth, it is to be understood that all matter hereinbefore set forth or shown in the accompanying drawings, is to be interpreted as illustrative and not in a limiting sense. V

I claim as my invention:

1. In lighting apparatus, in combination, a reflector of glass having means at its upper end for attachment to a light fixture and an open mouth at its lower end, the sides there of curving outwardly and downwardly from said upper end to a portion at which the diameter of the reflector is greatest, the sides thence curving inwardly and downwardly to said open mouth, the upper portion of said reflector having means adapted to reflect the light rays from a source of light within the reflector, and the lower portion of said reflector below said portion of greatest diameter and about said open mouth being adapted to permit substantially free passage of light. rays and having means adapted to difl'use the lightpassing therethrough.

2. In lighting apparatus, in combination, a reflector of glass having means at its upper end for attachment to a light fixture and an open mouth at its lower end, the sides thereof curving outwardly and downwardly with increasing pitch from said upper end to a point at which the diameter of the reflector is greatest adjacent said lower end, the sides thence curving inwardly and downwardly, said mouth being of reduced diameter, and an electric lamp depending from said fixture within said reflector, the filament thereof being positioned above said portion of greatest diameter of said reflector, said lower inwardly and downwardly curved portion of said reflector adjacent the mouth thereof having a light dilfusing covering and being adapted to shield said filament.

In lighting apparatus, in combination, a reflector of glass having means at its upper end for attachment to a light fixture and an .open mouth at its lower end, the sides thereof curving outwardly and downwardly with increasing pitch from said upper end to a point at which the diameter of the reflector is greatest adjacent said lower end, the sides thence curving inwardly and downwardly, said mouth being of reduced diameter, and an electric lamp depending from said fixture within said reflector, the filament thereof being positioned above said portion of greatest diameter of said reflector, the upper portion of said reflector having a heavy density opal glass surface adapted to reflect and direct downwardly rays from said filament, the lower portion thereof having a light diffusing surface adapted to shield said filament.

4. In lighting apparatus, in combination, a reflector of glass having means at its upper end for attachment to a light fixture and an open mouth at its lower end, the sides thereof curving outwardly and downwardly with increasing pitch from said upper end to a point at which the diameter of the reflector is greatest adjacent said lower end, the sides thence curving inwardly and downwardly, said mouth'being of reduced diameter, an electric lamp depending frpm said fixture within said reflector, the filament thereof being positioned above said portion of greatest diameter of said reflector, the upper portion of said reflector having a heavy density opal glass surfacing adapted to reflect and direct downwardly rays striking the same from said filament, and the lower portion of the reflector including said downwardly and inwardly curved lower end portion having a light density opal surfacing adapted to shield said filament.

5. in lighting apparatus, :1 depending reflector having means at its upper end for attachment to a light fixture and comprising a body of clear glass having light diffusing means upon its inner surface, and having upon the upper portion of the outer surface thereof a covering of reflecting material.

(5. In lighting apparatus, a depending reflcctor having means at its upper end for attachment to a lightfixture and comprising a body of clear glass having upon its inner surface a covering of light density opal glass to act as a diflusing medium, and having upon the upper portion of its outer surface a covering of heavy density opal glass to act as a reflecting medium.

7. Inlighting apparatus, a depending refiector having means at its upper end for attachment to a light fixture, an open lower end and sides curving downwardly and outwardly from said upper end thence inwardly and downwardly to said open lower end, said reflector comprising a body of clear glass having on its upper portion and extending downwardly to a line adjacent its portion of largest diameter a surfacing of reflecting glass, the lower portion of said body of clear glass below said line having a surfacing of light difl'using material.

8. In lighting apparatus, a depending refiector having means at its upper end for attachment to a light fixture, an open lower end and sides curving downwardly and outwardly from said upper end thence inwardly and downwardly to said open lower end, said reflector comprising a body of clear glass having over its entire inner surface a coverin of light density opal glass to serve as a di using medium, and having on the outer surface of its upper portion extending downwardly to a line adjacent its portion of largest diameter a covering of heavy density opal glass adapted to serve as a reflecting surface.

9. In lighting apparatus, :1 depending reflector having means at its upper end for' having over its entire inner surface a covering of light density opal glass to serve as a diffusing medium, and having on the outer surface of its upper portion extending downwardly to a line adjacent its portion of largest diameter a covering of heavy density opal glass adapted to serve as a reflecting surface, the outer surface of said body of clear glass below said line having rounded ribs raised thereon.

10. In lighting apparatus, a depending reflector having means at its upper end for attachment to a light fixture, an open lower end and sides curving downwardly and outwardly from said upper end thence inwardly and downwardly to said open lower end, said reflector comprising a body of clear glass having over its entire inner surface a covering of light density opal glass to serve as a diffusing medium, and having on the outer surface of its upper portion extending downwardly to a line adjacent its portion of largest diameter a covering of heavy density opal glass adapted to serve as a reflecting surface, and an electric lamp depending from said fixture within said reflector, the filament thereof being positioned above said line marking the lower end of said reflecting covering.

In testimony whereof, I have signed my name to this specification this 31st day of March, 1925.

LINDSLEY SCHEPMOES.