US481288A - Sylvania - Google Patents

Description

(No Model.)

v L.T;STANLEY. REPLEGTING SHADE FOR INGANDESGENT ELECTRIC LAMPS.

No. 481,288. Patented Aug. 2-3, 1892.

Wdnesaed Wu W UNITED STATES. '1 ATENT Fries,

LUOIUS T. STANLEY, OF BROOKLYN, NElV YORK, ASSIGNOR TO THE CUTTER ELECTRICAL AND MANUFACTURING COMPANY, OF PHILADELPHIA, PENN- SYLVANIA.

REFLECTlNG-SHADE FOR INCANDESCENT ELECTRIC LAMPS.

SPECIFICATION forming part of Letters Patent No. 481,288, dated August 23, 1892.

Application filed October 22, 1891. Serial No. 409,561- (No model.)

To aZZ whom it may concern.- B is an apron formed as a truncated conical Beit known that I, LUCIUS T. STANLEY, a reflector which is secured to the edge of the citizen of the United States, and a resident of reflector A, preferably by forming on the lat- Brooklyn, in the county of Kings and State of ter a flange O, which is caused to engage in New York, have invented certain new and any proper mannerwith the apron B. Asimuseful ImprovementsinReflecting-Shades for ple way of accomplishing this is to insert Incandescent ElectricLamps,of which the folheaded pins D in the part B, which may enter lowing is a specification, reference being had the widened portions of slots E in the edge to the drawings accompanying and forming or flange O and form an ordinary bayonet- IO a part of the same. joint.

Myinvention consistsin a combined reflect- The reflector B is formed or provided with ing and diffusing shade for electric incandesa continuous groove or annular seat F, into cent lamps. which is fitted the diffusion-plate G, of opales- The objects of my invention are to provide cent or ground glass, which is held in place I 5 a shade of this character that may be readily by ears H H, punched out of the material of attached to and detached from an incandesthe reflector or apron B. This apron has sevcent lamp of any ordinary size or form or to oral useful functions. It protects the glass any of the sockets for such lamps that are from breakage. It aids in diffusing the light, now in common use. and it shields the eyes from the glare of the 20 Another object of the invention is to conlight. struct the reflector in such manner that it will This shade may be attached to a lamp-globe intercept nearly all the rays of light thrown or lamp-socket by any convenient holder; but off from the incandescent carbon and direct I have devised a simple and efficient device them into a given zone of illumination and at for this purpose, which formspart of the shade z 5 the same time to so diffuse a portion of such itself. This consists of two or more, preferrays as to soften and shade off the boundary ably three, spiral springs K, the ends of to such Zone, so as to throw a strong yet soft which are formed or provided with hooks d (I, light with no heavy shadows. To accomplish that are inserted in holes 0 0, located at equal these objects I combine with a lamp a paradistances apart around the rim of the opening 0 bolic reflector, a conical reflector, and aground in the reflectors A. or opalescent glass plate, each of which in When the end of the neck of a lamp with Well-known ways effects in a measure the rethe shank E attached is passed up through sult sought by me, but by Which, when comthe opening in the reflector and between the bined in accordance with my invention, I sespiral springs, the latter, pressing upon the 5 cure a greater amount of effective illuminaneck between the shoulder of the shank and tion from a given lamp as well as a more perthe enlarging sides of the globe, hold the shade fect diffusion of the light. securely in place. 7

My improvements are illustrated in the ac- In practice the annular flange 0 does not companying drawings, in whichfit so closely to the reflecting-apron B but 40 Figure l is a vertical central section of the that there is an air-space between them, not 0 combined reflector and shade attached to a sufficient to permit the passage of any sensilamp. Fig. 2 is a top plan view of the means ble amount oflight, but enough to constitute, which I employ for attaching the same, and in connection with the opening at the top of Fig. 3 is aplan view of the joint between the the reflector A, a perfect means of ventilating 45 two reflectors. the inside of the shade and preventing the 5 A is the parabolic reflector, constructed and same from overheating. The parts 0 and B prepared in any suitable manner with a polin Fig. 1 are shown as slightly separated to ished inner surface and provided with an illustrate this feature. opening of sufflcient diameter topermit the I prefer to make the two reflecting portions 50 passage of a lamp base or socket. A and B of myimproved shade of aluminium; 30o

but other materials may be used, and various well-known ways of fashioning or forming the several parts may be followed.

It will be observed that when the incandescent lamp is in position in this reflector the rays from the illuminated carbon are received by and reflected from both the parabolic and the conical portions of the shade, which produces a very desirable double effect. The parabolic portion tends to concentrate the main portion of the rays into a limited zone of illumination, which yields the most desirable light for reading or other purposes where a certain concentration is desired; but the remaining rays are dispersed by the conical portions, whereby the boundaries of the zone of more intense light are shaded off and sufficient light diffused to light up surrounding spaces to a considerable extent, while all rays are softened by the glass.

Reflecting-shades as ordinarily constructed are not as well suited as this one for general use, for the reason that no provision is made for concentration of a part of the rays and dispersion of others.

Vhat I claim is 1. A reflecting shade for incandescent lamps, consisting in the combination of aparabolic reflecting portion provided with a contracted opening for the reception of the lamp neck or socket and of such depth as to permit the incandescent conductor or light-giving portion of a lamp when in position in the shade to extend or project out beyond the edge of the said parabolic portion, a conical or outwardly-flaring rim or portion extending from the parabolic part below the incandescent conductor, whereby both portions will receive directly the lateral rays of light, and a diffusing or translucent plate covering the open end of the shade, as set forth.

2. The combination, with a reflecting-shade for incandescent lamps having a contracted opening for the passage of the lamp neck or socket, of three spiral springs around the opening and above or outside the shade and having their ends secured or connected to the shade at points around the edge of the opening, as set forth.

3. The combination, with the parabolic reflecting-shade A, having a flange O, of an annular reflectingapron B, secured to said flange, with an intermediate air-space, and a difiusion-glass closing the lower opening of the shade, as set forth.

LUCIUS 'l. STANLEY.

Witnesses:

FRANCIS G. GALLAGER, GEO. H. WENTZ.

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