US694068A - Incandescent lamp. - Google Patents

Description

'No. 694,068. Patented Feb. 25, I902.

' E. MGUUAT.

INGANDESGENT LAMP.

(A pplication "filed June '15, 1961.

(No Model.)

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UNITED STATES PATENT OFFICE.

EUGENE MCOUAT, OF MALDEN, MASSACHUSETTS.

INCANDESCENT LAMP.

SPECIFICATION forming part of Letters Patent N 0. 694,068, dated February 25, 1902.

Application filed June 15, 1901.

To all whom it may concern:

Be it known that I, EUGENE MOOUAT, of Malden, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Incandescent Lamps, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates to incandescent electric lamps of the class that have attached reflectors; and it consists in making the bulb of the lamp in a peculiar manner and also in forming and attaching the reflector.

The object is to improve the construction and to add to the usefulness and durability of thelamp. This object Iattain by the means illustrated in the accompanying drawings, in which- Figure 1 is an elevation showing the lamp complete. Fig. 2 is avertical section showing the glass part andthe filament. Fig. 3 is a plan of the reflector. Fig. 4 is an elevation of the reflector.

In the drawings Figs. 1 and 2 show a lamp of a peculiar design; but I do not wish to confine myself to any one design, as my invention will apply to most of the lamps of this class. The stem and filament shown are of well-known construction and may be varied in any desired manner. The neck A of the bulb, as shown in Figs. 1 and 2, has a novel feature at N-that is, it is drawn in so as to become as small as possible and yet admit of room for the stem S. The obj ectof thus drawing the neck in is to obtain all the space possible for utilizing the mirror-surface, and thus to get the advantage of the rays of light that pass upward from the filament and which are of little value unless reflected and directed to the place where the light is of the greatest use-that is, to the desk, table, or bench of the user. In other words, this arrangement enables me to place a mirror very near the Serial No. 64,747. (No model.)

source of light, so as to reflect the rays that would otherwise be wasted. The reflector consists of a thin shield R, of metal, havinga mirror-surface on its under side-that is, the side that is toward the source of light. This mirror R is thin and flexible and is cut on the line K, Fig. 3, so that it may be bent tempo: rarily in such a manner as to admit of its being placed upon the lamp. When so placed, it will spring back into its normal shape, and thus remain attached to the lamp, as shown in Fig. 1, the collar 0 fitting accurately about the contracted part N of the neck of the bulb. This construction of the lamp and its mirror admits of the renewalof the mirror when the same has become dull or otherwise defective.

I claiml. A bulb for an incandescent lamp, having a broadly-extended, flattened, spherical surface,immediately above the source of light, and having its neck, between the said flattened spherical surface and the cap, contracted to receive a reflector, whereby nearly all the upward rays'of light are reflected, substantially as and for the purpose set forth.

2. An electric incandescent lamp, having a bulb, the neck of which-is contracted between the cap and the body; and a mirrorshield in the form of a flattened spherical surface, adapted to closely fit the bulb, and having a small central opening, and cut radially from said opening to the circumference, whereby it is adapted to be detachably attached to the neck of the bulb, substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 12th day of June, A. D. 1901.

EUGENE MoOUAT. Witnesses:

WILLIAM EDSON, FRANK G. PARKER.

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