US148921A

US148921A - Improvement in reflecting lantern or lamp caps

Info

Publication number: US148921A
Authority: US
Publication date: 1874-03-24
Anticipated expiration: 1891-03-24

Description

T. H. BRAISTED.

4ing Lantern or Lamp Caps.

Reect Patented March 24, 1874.

NITED STATES Arn'r Frrcn.

THOMAS H. BRAISTED, OF NEW YORK, ASSIGNOR TO CHARLES STEWART BRAISTED, OF BROOKLYN, N. Y.

IMPROVEMENT IN REFLECTING LANTERN OR LAMP CAPS.

Specification forming part of Letters Patent No. 148,921, dated March 24, 1874; application filed May 23, 1873.

To all whom Iit may' concern! h Be it known that I, THOMAS H. BRMSTED, of' the city, county, and State of New York, have invented an Improved Reflecting Lamp or Lantern Cap, of which the following is a specification:

Figure l'is a central vertical section of my improved reflecting-cap, and Fig. 2 a bottom view of the same.

Similar letters of reference indicate corresponding parts in all the figures.

This invention has for its object to produce a cap for lamps or lanterns, especially for streetlamps, whereby ample reflection of the light will be obtained and a downward current of the products of combustion from the lamp effected, the outer or upper cap portion being entirely solid, so as not to admit rainwater or dust, &c., into the lamp from above. My invention consists in making the cap with a downwardly-projecting reflecting-cone, which is combined, by a perforated annular plate, with an outer reflecting-flange, all as hereinafter more fully described.

In the accompanying drawing, the letter A represents the upper part or covering portion of the cap. From and within t-he same is suspended, by means of lugs or by an inner flan ge, ci', a metal plate, B, whose lower surface is polished throughout to constitute a reilector. The central part of this metal plate B is depressed to form a cone, b, which enters the middle of thelantern-globe C, and is, therefore, just above the light to properly reflect the same outward. I prefer to make such cone b with corrugated surface, as shown. The outermost part of the plate b is turned up slightly, as shown in Fig. I, to form an outer annular reliector, d, which embraces the upper part of the globe O. Between the cone b and the outer redector d the plate B forms an annular perforated portion, c, which serves as a conductor of gases from the globe O to the space between the outer part of B and A, so that such gases will escape in the direction of the arrow shown in Fig. l. .By this arrangement of the perforated part c above the globe C, and by leaving an annular open space between the outer edge of the reilector d and the cap A, ample room for draft is obtained, and the cap still made to entirely protect the lamp, and to exclude from the interior of the lantern water, dust, Src.

The refiector as made will be very effective,

and will serve to diffuse the light in all directions better than can be .done by the more costly reliectors and appliances now in use for the same purpose.

The reflector may be made of glass instead of metal, and suitably attached to the cap A.

I claim as my invention and desire to secure by Letters Patent- The lantern or lamp cap composed of an upper plate, A, and lower plate B, the latter constituting the cone b, perforated plate e, and outer reliector d, substantially as herein shown and described.

' THOS. H. BRAIS'IED. W'itnesses:

FRED. HAYNES, MICHAEL RYAN.