US729862A - Electric heater. - Google Patents

Description

No. 729,862. PATENTED JUNE 2, 1903.

J. F. HEWITT & G. W; SPATIG.

ELECTRIC HEATER.

APPLICATION FILED DEC. 30, 1901.

N0 MODEL.

'ut 414mb. v.

UNlTlED "Sterne Patented June 2, 1903.

PATENT (llrrrcs.

J ()SEPH-F. HEWITT AND CHARLES IV. SPATIG, OF ALLEGHENY, PENN- SYLVANIA.

ELECTRIC HEATER- :EPECIFTOATION forming part of Letters Patent No. 729,862, dated June 2, 1903.

Application filed DeoemherdO, 1901. semi No. 87.730. (No model.)

To all whom. it ntmy conceive/.-

Beit known that we, JOSEPH F. HEWITTand CHARLES W. SPATIG; citizens of the United States, residing at Allegheny, in the county ofAllegheuy and State of Pennsylvania, have invented a new and useful Improvement in Electric Heaters, of which improvement the following is a specification.

This invention relates to certain new and useful improvements in electric heaters, and relates particularly to such class of heating devices as are employed for heating beds and also for various heating purposesin any instance where the same may be required.

The invention has for its object to construct a device of this class having an insulated core wrapped with wire, the convolutions of the wire being wrapped so as not to come in contact with each other, or a coil may be employed instead of the core, and the coil or core has connected thereto a plug'for attachment to the ordinary incandescent-lamp socket.

Briefly described, therefore, the invention comprises an apparatus consisting of a metalliccaseforelectricheatingpurposes. This case contains a receptacle which is insulated with mica and other material. In this receptacle is placed a resistance-core which heats the case. A lid carrying an insulating-tube covers the coil, and afiexible lamp-cord passes through the tube and is connected to the coil. The other end of the cord is connected to a plug adapted for engagement in an incandescent-lamp socket, and all of this construction will be hereinafter more specifically described, and then particularly pointed out in the claim.

In describing the invention in detail reference will be had to the accompanying draw ings, forming a part of this specification, and wherein like numerals of reference will be employed for designating like parts througlr out the several views of the drawings, in which- Figure 1 is a perspective view of our improved electric heater. Fig. 2 is a centrallongitudinal section thereof. Fig. 3 is a transverse vertical sectional view taken on the line 3 3 of Fig. 2. Fig. 4c is a side elevation of a modified form of device. Fig. 5 is a transverse vertical sectional view of the same. Fig. (i is a modified form of heating-coil.

To put our in ven-tioninto practice, we pro vide a casing or receptacle 1, which may be made of any suitable material readily conductive to heat and may be made inany approved or desired form, a practical form being that shown in the illustration, in which the receptacle is shown substantially oblong or rectangular in shape with rounded ends. This receptacle is provided with interior partitions 2, which form a box to receive the iron core or heating-coil 3. This latter is insulated with asbestos 4 or other suitable material which prevents the wire or core from coming in contact with the metal and has the feed wire 5 connected thereto. In practice .it is the intention to connect this feed-wire direct to an ordinary plug for engagement in the ordinary incandescent -lamp sockets. The core or coil is covered by means of a lid 6, hinged or slidably connected to the upper face of the receptacle and having an insulated tube or sleeve 6, through which the feed-wire.

is passed. The space within the receptacle surrounding the heating coil or core may be filled with water, as shown, or this space may be left vacant, and the air contained therein becoming heated will serve the same purpose as the heated water. It is preferable, though, to provide the receptacle with an inlet 7, so that water may be placed therein when desired, and this inlet may be normally sealed by means of a screw-cap 8.

In Figs. 4 and 5, we show a modified form of construction, in which there'ceptacle l is in the form of an inverted 'l", and the heatingcore, as shown, is hollow to allow the water to pass through, this core being placed within the inclosing walls 2', as in the preferred 7 form of construction. This form of construction may also be provided with an inlet 7 so as to permit the filling of the receptacle with water. This hollow core will materially assist in the heating when wateris used.

In Fig. 6 we show another modification, in which we have a series of pipes connected to= gether and connected to a hollow core. These pipes 8 are connected to the core 9, so that water may circulate therethrough.

In the practice of the invention it will be bestos arranged Within said partitions, a lid 15 on the top of the receptacle extending over said coil, an insulated tube extending through the lid for the reception of the feed-Wire, and an inlet in the receptacle.

In testimony whereof We have hereunto 2o signed our namesin the presence of two subscribing witnesses.

JOSEPH F. HEWITT. CHAS. XV. SPATIG.

In presence of Lotus MOESER, R. S. ABEGYSISTER.

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