US1052997A - Electric heater. - Google Patents

Description

W. BARSTOW.

ELECTRIC HEATER.

uruonlox nun IAY 21, 1912.

1,052,997. Patented Feb. 11, 1913.

p O O O O O o o o 04.0 c J INVENTOR WITNESSES 74.56, king ATTORNEY UNITED STATES PATENT OFFICE ELECTRIC HEATER.

Application filed May 21,

Specification of Letters Patent.

Patented Feb. 11, 1913.

1912. Serial No. 698,816.

1 0 all whom it may concern.

Be it known that I, \Vnron BARSTOW, a citizen of the United States, rcsidim at San Francisco, in the county of San l rancisco and State of California, have invented new and useful Improvements in Electric Heaters, of which the following is a specification.

The object of the present invention is to provide an effective form of electric heater for rapidly heating the air of an apartment, railroad car, or the like.

In the accompanying drawing, Figure 1 is a vertical cross section of the heater; Fig. 2 is a side view thereof; Fig. 3 is a horizontal section thereof.

Referring to the drawing, 1 indicates a wall of an apartment, car, or the like, to which are secured by screws 2, or in any suitable manner, bands I) which are clamped around a cylindrical pipe 4, somewhat resembling in form and size a joint of an ordinary stove pipe. The lower end of said pipe is closed by a circular plate (3, the rim of which is, as shown at 7, beaded over the outwardly bent. edge ot the lower end of the cylindrical pipe -'l-, and to said plate is riveted an asbestos hoard terminal block 8, through which pass terminals 5) to which are secured wires 11 leading from any suitable source of supply of electricity. Upon said lower plate (3 are supported, at right. angles to one another, vertical mica sheets 12, each sheet being slitted verticall from the. center of a horizontal edge t iercot' to about the middle, the slit. 13 of one sheet extending from the lower edge upward, and that 1 1 of the other sheet from the upper edge downward, the slitted portion of each sheet being passed over the unslitted vertical central portion of the other sheet. Near their outer vertical edges said sl'iects are formed with a Vertical series of small apertures lti. A high resistance wire 17 is connected to one terminal 9 and is passed in succession through the lowermpst aperture in each sheet, and then successively through higher apertures therein, tinally passing through the uppermost aperture of one of the sheets and then connected, to the other terminal .9. The pipe it is formed in the lower portion. not higher than the mica sheets, with a number of apertures 18 allowing air to enter.

The mode of operation of the device will be readily understood from the foregoing description. \Vhen electricity is caused to pass through the high resistance wire, said wire becomes highly heated, heating the adjacent air and causing it to rise in the pipe and flow out from the top thereof. its place being supplied by air (lowing through the i apertures '18 and impinging againstv the highly heated wire, which is in turn heated and flows to the upper portion of the pipe.

I claim 1. In combination with a conduit open at the top and having an aperture at the bottoln, a coil of high resistance wire within said pipe, and vertical sheets of mica sup ported within the pipe and crossing each other, and supporting said coil.

2. vIn combination with a cylinder, open at, the top and having a plurality of openings in the lower portion. means for closing the bottom of the cylinder, two terminals carried by said means, vertical mica sheets supported upon said nu-ans, and extending as high as said lower portion and having a large number of apertures in their vertical edges, and a coil of high resistance wire connected to said terminals and passing snccessively through said apertures.

In testimony whereot l have hereunto set my hand in the presence of two sub scribing witnesses.

WELOII BARSTOW.

Witnesses FRANCIS M. Wmon'r, D. B. Rion'mos.

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