US287314A

US287314A - Charles g

Info

Publication number: US287314A
Authority: US
Publication date: 1883-10-23
Anticipated expiration: 1900-10-23

Description

(No Model.)

O. G. PERKINS;

ELBGTRIO INGANDESOBN'I LAMP AND HOLDER.

No. 287,314. Patented Oct. 28, 1883.

Fil cl.

ATTESTJ V mvnrroa:

WM 6mw- I y UNITED STATES PATENT OFFICE.

CHARLES G. PERKINS, OF NEXV YORK, N. Y., ASSIGNOR TO THE IMPERIAL ELECTRIC LIGHT COMPANY, OF SAME PLACE.

ELECTRIC INCANDESCENT LAMP AND HOLDER.

SPECIFICATION forming part of Letters Patent No. 287,514, dated October 28, 1883.

7 Application filed May 0,1883. (No model.)

To all whom it may concern:

Be it known that 1, CHARLES G. PERKINS, a citizen of the United States, and a resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Electric Incandescent Lamps and Holders, of which the lollowing is a specification:

Myinvention relates to an eleetricincandescent lamp and holder adapted for an electro lier.

In my former applications for Letters Patcut for electric incandescent lamps, with plasterof-paris within the neck of the globe, no means were provided for arresting the downward radiation of heat, which would evidently arise from several carbons illuminating at the same time, and in time theplastenotparis would convey the heat to the delicate mechanism forming the switch, and cause the several parts to warp and ultimately destroy the same. This objection is obviated by first placing within the wall 01' the neck of an (310(- trie incandescent lamp a suitable (piantity of mineral wool or other nonconducting mate rial, the result of which prevents the down ward radiation of the heat as generated by the illuminated carbons within the globe, of which a full description will be given hereinafter.

The first part of my invention. consists in arranging within the neck of an incandescent lamp a suitable quantity of mineral wool sup ported at the top and bottom by disks of paper or other suitable material, the whole supported by plaster-of-paris, having a central projecting metallic screw, and a cylindrical metallic projection provided with an annular bevel projecting below the base of the lamp.

The second part of my invention consists of a hollow ease of a cylindrical shape, open at both ends. The upper on d is provided with a bevel projection integraltherewith, and corresponding with a metallic sleeve made in halves and mounted on said bevel projection.

The third part of my invention consists of a disk made of insulating material, mounted with a straddle-screw nut and two flat springs, one of which is electrically connected with the metallic straddle-screw nut, while the other is electrically connected with the metallic rings made in halves by an upright spring provided with a depression corresponding with a bead integral with the lower portion of the afore said metallic ring in halves, the whole mounted on a glass base provided with a central metallic sleeve provided with screw-threads 011 the inner circumference, at the lower portion thereof, while the upper. end thereof is pro vided wit-h screw-threads on its outer circumference corresponding with the threads in the disk of insulating material.

In the drawings, Fi ure 1 represents a vertieal section of an electric incandescent lamp, showing the principle features of my invention. Fig. 2 represents a vertical section of the lampholder. Fig. 3 represents the plug of plaster-of-paris, with metallic bevel-edged ring and central metallic screw attached thereto. Fig. 4 represents one-half of the metallic sleeve. Fig. 5 represents a plan view of the disk of insulating material, with flat springs and straddle-screw nut connected therewith. Fig. 6 represents a detail view of the flat metallic spring provided with an upright integral therewith, and which forms one conneetion for the circuit of the lamp.

Similar letters referto similar parts throughout the several views, in which (1 represents the globe of an electric incandescent lamp.

I) is the neck, and c is the mineral wool, supported therein by the disks (2 d.

c is the plug of plaster-of-paris, having the cylindrical metalli c proj ectionf, provided with the lJGVGbGdgGf, and also containing a central metallic screw, g, the whole held within' the neck I) by the plaster-otparis 71.

L i are the electrical conductors, one of which is electrically connected with the central screw,

g. The other is connected with the metallic o projectionf.

it represents the glass case, mounted'on the glass base Z.

k is the beveled projection of the glass case 7., and k is one-half of the metallic sleeve, 5 provided with an annular bead, on, on, the lower portion thereof.

a is the disk of insulating material, having a metallic straddle-screw nut, a, connected therewith. One arm of the straddle-screw IOO nut a is electrically connected with the flat spring 0, provided with a depression, 0, on

the under side thereof, near the end, in which one of the electrical conductors, 1, leading to the main-line wire, is held.

1) is the second flat spring, fastened to disk 5 n. This spring is also provided with a depression, 11 on the under side thereof, near its end, for holding the other electrical conductor, 2, in position, and at the same time making a perfect electrical contact therewith. The spring p is also provided with a perpendicular spring, 1), integral therewith, and is also providedwith a depression, 1)", corresponding with the bead, m, of the metallic sleeve k, with which the said springp makes an elec trical contact. Z is the metallic sleeve holding the disk at and base Z together. WVhenever the lainpand holder shall have been completed, the two are joined together by inserting the central screw in the straddlescrew nut, and then turning the lamp until the beveled edge of the metallic projection of the lampv shall have made a perfect electrical contact with the corresponding bevel on the metallic sleeve arranged on the beveled pro- 25 jection of the glass case forming partof the lamp-holder. \Vhen thelamp and holder shall have been mounted on the extending arms of an electrolier, the current will then travel through the wire 1 to the metallic flat spring 0, thence through the straddle-screw nut n, to the central screw, 9, from which it travels to the conductor 1', leading to the carbon filament, through which it passes to the conductor i, thence to the metallic cylindrical projection 3 f, to the metallic sleeve k, from whichit passes to the perpendicular sprin g p, and then cc to the flat spring 1), to the wire 2, leading to the mainline wire, thus completing the circuit through the lamp and holder.

Having thus described my invention, what I 'cent lamp, the mineral wool c, disksd d, plaster-of-paris plug 0, cylindrical metallic projection f, beveled edge f, metallic screw 9, and the electrical COIldllGtOISi i, the whole arranged within the neck I), substantially as shown and described. 7

4. In combination with an electric incandescent lamp holder, the case k, beveled projec= tion 7c, metallic sleeve k", and bead m, forming a part of the circuit-connections of the lamp, substantially as shown and described.

5. In combination with an electric incandescent lamp, the disk n, fastened to the glass base Z by the metallic sleeve 1 straddle-screw nut n, fastened to said disk n, the flat metallie springs 0 19, provided with depressions 0 19 for holding the leading-in wires into position and making a perfect electrical contact therewith, and the upright 12, integral with th e flat spring 1), and having a depression near its upper end corresponding and engaging with the bead m of the metallic sleeve is, mounted on the ease k, substantially as shown and described.

Signed at New York, in the county of New York and State of New York.

' CHARLES G. PERKINS.

\Vitnesses:

J. A. HURDLE,

GEORGE BECKER.