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Publication numberUS270339 A
Publication typeGrant
Publication dateJan 9, 1883
Publication numberUS 270339 A, US 270339A, US-A-270339, US270339 A, US270339A
InventorsEdward S. Ritchie
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Reflector for street-lamps
US 270339 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

(No Model.)

E. S. RITCHIE.

REFLECTOR FOR STREET LAMPS; No. 270,339. Patented Jan. 9,1883.

FL' O. J.

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lhvrren STATES ATENT Fries.

EDWARD S. RITCHIE, OF BROOKLINE, MASSACHUSETTS.

REFLECTOR FDR STREET LAMPS.

SPECIFICATION forming part of Letters Patent No. 270,339, dated January 9, 1883.

(No model.)

T all whom it may concern:

Be it known that I, EDWARD SAMUEL RITCHIE, of Brookline, in the county of Norfolk, of the State of Massachusetts, have invented a new and useful Improvement in Reflectors for Street-Lamps; and I do hereby declare the same to be described in the following specification and represented in the'accompanying drawings, of which- Figure l is a top view, Fig. 2 a bottom view, Fig. 3 an end view, and Figs. 4 and 5 cross-sections in planes at right angles to iach other, of a reflector embodying my invention.

This reflector at its central part has an opening, a, extending through it to receive the chimney of a lamp when the reflector is used with a lamp, or to allow the smoke of a gas-flame to pass upward through such rcflector when it is used with such a burner.

It is customary to have a reflector provided with concave surfaces to receive light from a flame, and to reflect in condensed or diagonal beams the rays thereof in nearly opposite directions directly upon a street, and by concave surfaces to reflect the rays nearly vertically downward upon a plane mirror to be again reflected upon the street.

The usual forms for direct reflection are shown in the drawings at A and B, as arranged on opposite sides of the opening a, each reflecn'ig-surt'ace being arched or an ellipsoidal segment of truncated cone or'an approximate thereto.

In front of the opening a, and between the .two curved and tapering reflecting-surfaces A. and B, is a flat or plane reflecting-surface, C, which is horizontal, or may be very slightly inclined either upward or downward. increases in width as it extends from the opening a. This reflecting-surface U is designed to illuminate the street in front and for an angular space of about ninety degrees in front of the lamp; but there would be spaces on the street between the portionsilluminated by the reflecting-surface O and that which can receive rays from the lateral Icflectors A and B. I place in rear of the opening a, and for theillumination of these spaces, and between the two lateral reflecting-surfaces A and 13, two plane reflecting-surfaces,

|,D E, arranged at an obtuse angle with each other, and each inclined downward, in manner as represented.

Each of the two rear reflectors may be made in two or more planes. slightly inclined to each other, in order to disperse the rays over a widerspace than-a single plane reflector would do.

A reflector made as hereinbel'ore described will operate in practice to great advantage in lighting a street or space in front tr and extending in lateral directions relatively to a lamp or gas burner. 1 do not claim in a reflector having two arched and tapering reflecting-surfaces arranged to reflect light in opposite directions from a flame arranged between them 5 but I claim- 1. A reflector, essentially as described, conreflecting-surtaces A and B, and the plane reflecting-surfaces 0, arranged substantially as set forth.

2. A reflector, essentially as described, consisting of two concave tapering ellipsoidal or arched reflecting-surfaces, A and B, and the rear plane or nearly plane reflecting-surface, D and E, arranged with each other, substantially as described.

3. A reflector, essentially as described, consisting of the concave or arched reflectingsurfaces A and B, the plane reflecting-surface G, and the auxiliary plane reflecting-surface D and E. arranged with each other, and an opening, -a., substantially as set forth.

4. A reflector provided with a hole, a. atits central part, and with concave or arched refleeting-surfaces A and B, and a plane reflecting-surface, O, disposed substantially as set forth.

5. A reflector provided with abole, a, atits central part, and with two concave arched reflecting-surfaces, A and B, and two rear plane reflecting-surlaces, D and E, arranged with each other and the said hole, substantially as set forth.

EDWARD SAMUEL RITCHIE.

Witnesses:

it. H. EDDY,

B. PRAT'J.

sisting of the concave or ellipsoidal or arched

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2422378 *Nov 22, 1943Jun 17, 1947California Inst Res FoundLow-level reflector
US6964506Jun 14, 2003Nov 15, 2005Allied Lighting Systems, IncLight reflector
US20030214811 *Jun 14, 2003Nov 20, 2003Sara Peter C.Light reflector
USRE39900Dec 20, 2002Oct 30, 2007Hein William ALight fixture having a plurality of light reflecting fins
Classifications
Cooperative ClassificationF21V7/04