US223790A

US223790A - Francis winters

Info

Publication number: US223790A
Authority: US
Publication date: 1880-01-20
Anticipated expiration: 1897-01-20

Description

F. WINTERS, Jr.

Electric-Lamp.

No. 223,790. Patented .lan.- 20, 1880.

INVENTOR.

Wnmessas N. PETERS. FHOTO-LITHQGRAPHER. WASHINGTON D c.

UNITED STATES PATENT OFFICE.

FRANCIS WINTERS, JR, OF NEW YORK, N. Y.

ELECTRIC LAMP.

SPECIFICATION forming part To all whom it may concern Be it known that I, FRANCIS WVINTERs, J r., of New York city, have invented a new and useful Improvement in Electric Lamps, of which the following is a specification.

My invention relates to a certain improvement in that class of electric lamps in which a current of air is caused to circulate between the carbons, so as to insulate the same and maintain the electric are at the top of the carbons, the object of my invention being to so construct and arrange the carbons and their holder that the current of air will be caused to pass between the carbons without the aid of any chimney or other outside means of inducing draft.

This object I attain in the manner which I will now proceed to describe, reference being had to theaoeompanying drawings, in which Figure 1 is a vertical section of a lamp constructed according to my invention, and Fig. 2 a sectional plan on the line 1 2.

Ais the positive, and B the negative, carbon, both of which are in the present instance tubular, arranged concentrically one within the other, and of such relative diameter that an annular space, a, shall intervene between the two carbons.

D is the holder for the carbon A, and E the holder for the carbon B, these holders being likewise tubular, and being insulated from each other by an annular block, I), of glass, rubber, or other suitable material.

X is the negative, andythe positive, wire of a suitable battery or magnetoelectric machine, the wire X being connected to the holder E, and the wire y being connected to an arm, (I, which projects from the holder D, and has flanges c c, by which itmay be secured to any suitable support.

of Letters Patent No. 223,790, dated January 20, 1880.

Application filed March 26, 1879.

In the holder D are formed a series of open- 'ings, i, through which air gains free access to the annular space a between the carbons A and B, the air being relied upon as the medium for insulating the carbons from each other, and for maintaining the electric arc in its proper position at the top of the carbons. The central opening of the inner or negative carbon, B, is also supplied with air through opcnin gs m in the lower portion of the holder E; but this is not essential, as said inner car bon may, if desired, consist of a solid rod instead of being tubular. The tubular carbon is preferred, however, as it affords a means of supplying air to the light at a point which could not be reached should the inner carbon be solid.

The proper proportions of the carbons in respect to each other will depend upon whether a continuous currentor reversed currents are relied upon to maintain the light.

I do not desire to claim, broadly, insulating the carbons and maintaining the are at the top of the same by means of a current of air passing between the carbons; but

I claim as my invention- The combination of the inner carbon, B, the outer tubular carbon, A, and the holder D, all arranged substantially as set forth, so that an annular space, a, open to the air at the lower end, will intervene between the two carbons, all substantially as set forth.

In testimony whereofIhave signed my name to this specification in the presence of two subscribing witnesses.

FRANCIS -IVINIERS, JR.