US558634A - Electric glow-lamp - Google Patents

Description

(No Model.)

B. A. COLBY.

ELEGTRIO GLOW LAMP.

No. 558,634. PatentedApr. 21, 1896.

ANDREW B GRAHAM.PHOTOUTHQWASHINGTDN. D C

EDXVARD A. COLBY, OF NEWARK, NEIV JERSEY.

ELECTRIC G LOW-=LAIVI P.

SPECIFICATION forming part of Letters Patent No. 558,634, dated April 21, 1896. Application filed May 21, 1894. Serial No. 511,895. on; model.)

.To aZZ whom it may concern:

Be it known that I, EDWARD A. COLBY, of Newark, Essex county, New Jersey, have invented a new and useful Improvement in Electric Glow-Lamps, of which the following is a specification.

My invention is an improvement upon that form of glow-lamp which is set forth in my Letters Patent Nos. 498,878, 49S,S79,?l98,929, and 499,097, and granted to me on the 0th day of June, 1893. It therefore belongs to that class of lamps in which a closed conductor, disposed in a substantially exhausted receiver, is subjected to the inductive influence of the field produced by varying currents in an external electric conductor.

My present invention relates to the construction of a lamp whereby any supports for the inducing-coil are rendered unnecessary, and the coil may, if desired, be placed directly upon the lamp itself; also in the mode of construction of the glass receiver; also in the substitution of a disk or flat ring of carbon or other suitable material in place of the ordinary filament.

I11 the accompanying drawings, Figure .l. is a section of thelamp on the line 1 1 of Fig. 2. Fig. 2 is an outside View showing the inducing-coil partly broken away and in section. Fig. 3 represents the lamp in section with the inducing-coil removed. Fig. 4 shows the incandescing body in the form of a fiat ring instead of a disk, as represented in Fig. 1; Fig. 5 is a crosssection of the ring shown in Fig. 4. Fig. 6 shows two parts of the glass receiver separate and indicates the modes of putting them together.

Similar letters of reference indicate like parts.

The glass receiver A is made in two hemispherical parts B and 0, each provided with the usual tube at D for exhausting the air therefrom. After these glass hemispheres B and C are made and while hot, the edges E and F are to be turned in, Fig. 6, thus mak ing inward flanges. In place of the ordinar r filament I use a disk G, of carbon, having offsets H. These offsets II are placed between the turned-in flanges E F of the glass receiver, and then, by means of the blowpipe or any other suitable means, the glass is fused together at the edges of E and F and the spherical receiver A thus completed. It will be seen from Fig. 3 that the disk G is thus held by its projections I-I between the turned over flanges E and F inside of the receiver. The receiver is then exhausted through one tube D and is sealed in the usual way.

In certain of my former applications I have shown my lamps with a closed coil filament contained wholly within the receiver, and I have represented said lamps as annular in form, so that they might be disposed upon the same support 011 which the inducing-coil is held. hen these lamps are so constructed as to require currents of high potential and high frequency, it is preferable of course not to use iron supports for either the lamp or the inducing-coil. The inventions set forth in my former patents were of course not limited to the use of such iron supports, but nevertheless I have thought it advisable, in the present case, to show my lamp so arranged and constructed as to enable such iro supports to be wholly omitted. l

\V hen the hemispheres B and C are brought togther to form the receiver A, depressions I are formed opposite one another at the point of junction of the hemispheres. At this point the lamp is surrounded by the inducing-coil J, which is wound upon any suitable spool K. which enter the depressions. These pins are secured to a spring-bar M, attached to the spool K, and this bar is pressed upon by the leaf-spring N, by which means the ends of the pins are forced into the depressions. In this way the induction-coil J is held in place upon the globe or receiver A. It will also be apparent that the carbon disk G is symmetrically disposed in a horizontal plane passing through the middle of the coil J and that when alternating currents are sent through the coil J currents will also be induced in and will circulate through the disk G, rendering said disk incandescent, so that it gives forth light-rays on both of its opposite circular flat surfaces.

In place of using a disk, such as G, I may use a ring 0, Fig. 5, which is simply the disk G with the central part out. This ring has projections I-I similar to those 011 disk G, which projections are held in like manner between the turned-over parts E and F.

Through the coil pass pins L, the ends of I claim v 1. The combination in an electric glowlamp of an inducing-coil, a receiver within said coil, and Within said receiver and surrounded by said coil a closed conductor in flat circular form having its face disposed in a plane parallel to the face of the coil.

2. The combination in an electric glowlamp of a receiver, a closed conductor wholly inclosed therein, an inducing-coil surrounding and supported upon said receiver and means for detachably securing said coil in place.

3. The combination in an electric glowlamp of a glass receiver formed of two hemispherical portions united at their edges, and a'close'd conductor in ilat circular form Within said receiver and provided with radial projections received between said edges.

4. The combination in an electric glowlamp of a glass receiver, a closed conductor therein, and an inducing-coil; the said receiver having diametrically-opposite depressions and the said coil being provided with internal points entering said depressions.

5. The combination in an electric glowlamp of the glass receiver A provided with placing between said flanges the projections 1-1 of the conducting-disk G: fourth, fusing the edges of the hemispheres B 0 together to produce a globular receiver A, and, fifth, exhausting said receiver.

7. The combination in an electric glowlamp of the glass receiver A provided with internal flanges, E and F, and diametricallyopposi'te depressions I, the conducting-disk G having projections H received between said flanges and the inducingcoil J supported upon said receiver A and having pins, L, entering said depressions I, substantially as described.

EDVVARD A. COLBY.

Witnesses:

H. R. MOLLER, M. Boson.

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