US1420840A - Portable water heater - Google Patents

Description

G. w. HEWITT. PORTABLE WATER HEATER.

APPLICATION FILED APR. 16, 1921.

. Patented $1116 27, 1922.

UNITED, STATES PATENT OFFICE.

GEORGE W. HEWITT, OF BAKERSFIELD, CALIFQBNIA.

I PORTABLE W ER HEAT R.

To all whom it concern Be it known that I, GEORGE VV..-HEWITT, a citizen of the United States, residin at Bakersfield, in the county of Kern and tate of California, have invented a new and useful Portable Water Heater, of which the following is a specification.

This invention relates to water heaters,

and has for its principal object to provide- Qa portable device for heating small quanticonnected and is taken on a ties of water which will be. of such size and shape that, it may be conveniently carriedin a traveling bag or suitcase, and which will be of simple design and consequently low production cost.

Referring to the drawing which is forillustrative purposes only:

Fig. 1 is a view showing an application of a portable water heater embodying the features of my invention.

Fig. 2 is a vertical section through the water heater in whicha portion of one of the circulating chambers is cutaway to dis-" I employ, the heating element as herein shown being inverted from the position in which it is shown in Fig. 1.

As shown in t e drawing, in the practice of my invention I mploy a container 11 composed of a shell 12 and a cover 13. Enclosed within the container 11 I provide water circulating chambers 14 and 15 which arepreferably formed of a thin sheet metal shell 16 and are approximately semiecircular in cross section flattened as indicated at 17 to provide a space 18 between the circulating chamber 14 and the container shell 12wfor the passage of an electric cord 20, and a space 19 between the circulating chamber 15 and the container shell 12 to accommodate bolts 25 which form connecting means for the straps 26 which encircle .and bind to-' gether the circulating chambers 14 and 15. Between the circulating chambers 14 and 15. is inserted a heating element 30 com prised of'a-winding 31 supported upon a plate of insulating material, such as sheet mica, notched 33 to provide a means of main- ,tricity supplied from an exterior .through the cord 20..

Specification of Letters Iatent. Patented J 119' 27,1922. Application filed ilpril 16, 1921, Serial No. 461,792.

taining the winding 31 in 'position. The ends 35 of the heatlng element winding 31 are attached to binding posts 36 and 37 mounted in the mica plate 32, and to which binding posts'are connected, on the o posite side of the plate 32, wires 38 which orm the cord 20. I

Onthe cover 13 is mounted a collar 40' fitted with an insulating bushing 41 through which the cord 20 extends so that it may be conn cted by means of a plug 42 with a recepta le 43 located in an exterior circuit. Between the faces of the heating element '30 and the adjacent walls of the circulating chambers are placed insulatin sheets .45 to prevent the contact of the winding with the circulating chamber walls, and underneath the straps at the points adjacentto the heating element are also placed small pieces 'of insulating material 46. Surroundmg the entire interior structure I provide I a wrapping 47 of asbestos paper to prevent the loss'of heat through the shell 12.

Water is admitted to the circulating chambers through a tube 50 extending through the cover 13 into the circulating chamber 14.

'Itwill be perceived that the tube extends a considerable distance down into the circulating chamber 14 and delivers the water to a point near the bottom thereof in order that a very complete circulation may be maintained. Rising within the circulating chamber 15, the water passes through an in- .terconnecting tube 52 and is delivered into the circulating chamber 15 in which it again rises and isexpelled through a curved outlet nozzle formed of a tube 55. During its passage through the circulating chambers the water is heated by its contact with the walls of the circulating chambers through which the heat generated by the heating element is conducted.

In Fig. 1 of the drawing I show the water heater connected to a basin cock 60 by means of a length of rubber tubing 61 provided with a diaphragm coupling 62. In this ap- I claim as m invention:

, .1. In a liqui heater, thecombination of:

a flat heating element; a circulating chamber having a flat side; insulation between said element and said side; and means for holding said element against said insulation.

a fiat heating element; a circulating cham-' her having a flat side; a second circulating chamber also having a flat side; a container surrounding said circulating chambers; means for'insulatin said element between said flat sides; an means for pressing said fiat sides against said means for insulating.

4. In a liquid heater, the combination of: a flat heating element a circulating chamber having a flat side; a second circulating chainber also having a flat side; a container surrounding said circulating chambers; means for admitting water through the wall of said container and into one of said chambers; water conducting means connecting said chambers; a water outlet for the other of said chambers; means for insulating said element between said flat sides; and means for pressing said fiat sides against said means for insulating. x

5. In a liquid heater, the combination of: a fiat heating element; a circulating chamber having a flat side; a second circulating chamher also 'havlng a flat side; a contalner surrounding said circulating chambers; means for admitting water through the Wall of said container and into one of said chambers; water conducting means connecting said chambers; a Water outlet connected to the other of said chambers and passing through the walls of said container; means for insulating said element between said flat sides; and means for pressing said flat sides against said means for insulating.

6. In a liquid heater, the combination of: a flat heating element; aflexible cord connecting said heating element to an outside circuit; a circulating chamber having a flat side;'insulation between said element and said side; and means for holding said element against said insulation.

7. In a liquid heater, the combination of: a flat heating element; a flexible cord connecting said heating element to an outside circuit; a circulating chamber having a flat side; a second circulating chamber also having a fiat side; means for insulating said element between said flat sides; and means for pressing said flat sides against said means for insulating.

8. In a liquid heater, the combination of: a fiat heating element; a flexible cord connecting said heating element to an outside circuit; a circulating chamber having a flat side; a second circulating chamber also having a flat side; a container surrounding said circulating chambers; means for insulating said element between said flat sides; and

means for pressing said flat sides against for insulating said element between said flat,

sides;'and means for pressingsaid flat sides against said means for insulating.

10. Ina liquid heater, the combination of: a" flat heating element; a flexible cord connecting said heating element to an outside circuit; a circulating chamber having a flat side; a second circulating chamber also having a flat side; a container surrounding said circulating chambers; means for admitting water through the wall of said container and into one of said chambers; water conducting means connecting said chambers; a water outlet connected to the other of said chambers and passing through the walls of said container; means for insulating said element between said flat sides; and means for pressing said flat sides against said means for insulating.

In testimony whereof, I have hereunto set my hand at Bakersfield, California, this 8th day of April 1921.

GEORGE W. HEWITT.

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