US634295A - Reflector for incandescent lamps. - Google Patents

Description

' Patented 0ctf3, 1899' W. GUDDCHILD. REFLECTOR FDR INDANDESCENT LAMPS.

(Application filed 1, 1899.) (N9 Model.)

\W J M Owe/QM UNITED STATES PATENT FFICE.

REFLECTOR FOR INCANDESCENT LAMPS.

SPECIFICATION forming part of Letters Patent No. 634,295, dated October 3, 1899.

Application filed February 11,1899. Serial No. 705,270. (No model.)

T0 ctZZ whom it may (oncern:

Be it known that I, WALTER GOODCHILD, a

citizen of the United States, residing at Wyoming, Essex county, New Jersey, have invented certain new and useful Improvements in Reflectors for Incandescent Lamps, of which the following is a specification.

This invention relates to reflectors used in connection with the bulbs of incandescent electric lights. Among the various forms of reflectors for this class of lamps one is provided by silveringthe upper part of the bulb down to a point near the largest diameter of the same, leaving the lower portion of the bulb clear all around. Another construction, which is designed, mainly, for a shade, incloses the upper half of the bulb all around with a shade of colored glass, which is afterward united integrally with the glass of the bulb by heat. These devices perform their functions, but being integral with or inseparably connected with the bulb are necessarily discarded with the bulb when the filament of the latter is burned out.

The object of the present invention is to provide a reflector of the form of the downwardlyflared upper part of the bulb and adapted to fit rather snugly about such part of the same, said reflector being supported wholly on the bulb by the downwardly-flarin g shape of the latter and having a suitable rel'lectingsurface, such as a silvered surface, for example.

In the accompanying drawings, which illustrate an embodiment of the invention, Figure 1 is a side elevation of the lamp, the reflector being represented in vertical mid-section. Fig. 2 is a plan View of the reflector detached.

Fig. 3 is a side elevation of a slightly-mo di-.

fied form of the reflector on a lamp.

A represents an ordinary incandescentbulb, and B the reflector thereon. The ordinary bulbs of these lamps are of substantially the same shape or form and for a given can dle-power also of substantially the same size. Of circular cross-section, they flare downward from the metal socket-plug a to about the point no, and the part below or beyond that point is nearly hemispherical.

The reflector B is constructed to fit quite snugly over and inclose the upper part of the bulb; but it may be readily lifted off and replaced, the smaller end thereof being of sufficent size to pass over the socket-plug a. The reflector is supported wholly on the bulb and by contact with its flared surface. At its lower edge the reflector may have a projecting marginal lip 19, and the reflecting-surface may extend out and over this lip.

- Fig. 3 shows the reflector without the lip ,b, but constructed otherwise in a similar manner.

Preferably the reflector B will be of glass, as it will then expand and contract under differences of temperature to about the same extent as the bulb; but the invention is not limited in this respect. Other materials not liable to injury by heat may be used, as aluminium, for example. Obviously it should not be unduly heavy.

An advantage of this reflector is that while it is readily removable and may be taken from a dis-carded bulb and put on a fresh one, thus obviating the loss of a reflector with each bulb, yet it does not require (as do most reflectors) some special form of lamp having means for securing it to the metal socket or plug, as it drops over and is supported entirely on the bulb itself. This adapts it to any ordinary incandescent bulb and also enables it to be produced very economically.

- As shown in Fig. 3, the lower edge of the reflector is scalloped and is in a plane at right angles to the axis of the bulb; but these'features are not essential. The scallops may be omitted and the bottom edge of the reflector be cut obliquely to the bulb-axis.

Having thus described my invention, I claim '1. The combination with the bulb of an incandescent lamp, of a light-reflector, which fits snugly but removably over the external surface of the'downwardly-fiared upper part of said bulb and is supported wholly and directly thereon, substantially as and for the purpose set forth.

2. The combination Withthe bulb of an incandescent lamp, of a removable reflector B, inclosing and snugly fitting the external surface of the upper, downwardly-flared portion of the bulb, said reflector being supported wholly and directly on the bulb and extending down about to the point where the bulb an outwardly-turned marginal lip at-its lower 10 is largest in diameter, substantially as set edge, substantially as set forth. forth. In witness whereof I have hereunto signed my name, this 9th day of February, 1899, in

a. The combination with the bulb A, of an incandescent lamp, of a removable, glass rethe presence of two subscribing witnesses. WALTER GOODOIIILD.

flector embracing, and housing the bulb, and supported Wholly on the downwardly-iiaring \Vitnesses:

HENRY CONNETT.

l upper portion of the same, said reflector fiti PETER A. ROSS, ting the outersurface of the bulb and having I

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