US1453574A - Electric water heater - Google Patents

Description

May 1, 1923.

Z. TROTZER ELECTRIC WATER HEATER Filed NOV. 1 1921 7 Zane/ a,

so arranged in the electric circ l'etcntecl May it, 1923- UNETE STATES lATENT OFFICE.

ZOLTAN TRGTZER, OF BUDAPEST, HUNGARY.

ELECTRIC WATER HEATER.

Application filed November To all 20 [mm it may concern Be it known that l, ZoL'niN Tnorznn, director, a CltlZI1 oi Hung" y, residing at Budapest, in Hungary, have inventetv cor tain new and use'l ul Improvements in Electric Water Heaters, of which the following; is a specification.

My invention relates to in'iprovcments in electric .val;er-heaters and more especially 1) to such heaters to be used in direct connection with water supply pipes, the objec being to draw according "to the requirements cold or hot water from the apparatus.

For this purpose I provide besides the 3 choked water passage leadingalon the heating body another direct channel shunting the former, being'tree from thrijittlino; and insert in the said direct water-channel a valve positively coupled with the switch iit of the heating body, to close the circuit ii the valve is pressed by the water-pressure ayaiinst its closing thereby the direct water channel.

In the annexed drawing I have shown as 5 an example an embodiment of my invention in diagrammatic sectional elevation.

Fig. 1 shows the parts in their relative position for the delivery of cold water and Fig. 2 in the position delivering hot 0 water.

With reference to the drawings:

1 is a receptacle with a central tube 2 and 3 is an electric resistance heater located in the annular space between receptacle 1 and tube 2. One terminal of the heating resistance is connected with contact and the other terminal with one wire of a cable 3O leading; to an electric current source, while the other wire of said cable is comiected to contact 5.

A tubular member 6 surrounding the lower end 01 the central tube 2 projecting,- from the bottom of the apparatus and adapted to slide thereon is provided with a flange 7 and a contact disc 8. A spring 9 tends to press the tubular member 6 together with the contact disc 8 into its upper position shown in Fig. 1.

12 is a valve and 11 a rod secured thereto and bearing against a perforated plate located near the delivery end of the tubular member.

The Washer 13 on the upper end of the central tube 2 serves as seat for the valve 12.

The heating body 3 divides the annular spaces between the receptacle 1 and the tube 1, 1921. Serial No. 512,103.

into two concentric annular chambers 1d and 15 communicating at their bottom by means of the opening 16 in the heating body The inner annular chamber to communicates at its top by means of the opening 17 of tube 2 diumet-rally opposed to opening- 16 with the interior oli tube 2. Chamber 15 is closed a 18 and the inlet connecting; branch 19 extends to the cover 16. Thus the water flowing; through the connecting branch 19 can enter the inner chamber 14 only through the small opening 20 diametrally opposite to opening;

The inlet connecting branch 19 is pro vided with a stuiling lining 21 to ensure a watertight connection with the spigot 22.

In operation the water entering from the spigot the connecting branch 10 flows round the valve disc 12, enters through opening the interior or" the central tube 2, and leaves the apparatus through the delivery end 26 ot the tubular member 6 without coming in touch with the heating body 3. The electric current being interrupted between the contact disc 8 and the contacts d and 5 respectively, cold water is delivered without throttling.

If however hot water is required, the tubular member 6 is slightly pulled downwards against the pressure of spring; 9. therebv t-hrottlino' tie passage of the water below the valve 12 and the pressure acting' upon the valve overcomes the spring 9 and presses this latter against its seat 13. By means of rod 11 and the perforated plate 10 the tubular member 6 will be depressed into its lowest position shown in Fig. 2. where it will be held against the pressure of spring 9. In this position contact disc 8 closes with contacts and 5 the circuit through the heating body 6 The water is compelled to pass through the small bore 20 into the outer annular space 1 circulates from top to bottom alone; the outer surface of the heating body and enters at the opposite side through aperture 16 the inner annular space 15. In this latter the water flows along the inner surface of the heating body from bottom to top and is delivered at the opposite side through opening 17 into the central tube 2.

Owing; to the choking; action of the suia l bore 20, the pressure acting upon valve 12 will be maintained and at the san'ie time the quautitv of tie water passing the appm'atw: reduced in a measure to ensure the heating to the desired temperature. This latter can be regulated by adjusting the throttling screw 27.

By closing the spigot, the pressure acting upon valve i2 is removed and the spring 9 lifts the tubular member 6 with the contact disc 8, interrupting thereby the electric circuit.

Owing to the large dian'ieter of the tube 2 no siphon effect will draw oh. the water from the spaces 14 and 1.5 and the heating body 3 will be kept constantly under water.

The interruption of the circuit at the con tacts t, 5 is a momentaiy one.

As it is to be seen the apparatus adjusts itscll automatically for the delivery oi cold water needed more often and the cold water will be delivered just as freely as if no heating apparatus were connected to the tap. The apparatus does not interfere in any way with the ready use of cold water and throttles the water flow only it hot water is required.

Any suitable means may be provided for connecting the heating apparatus with the water tap.

Having now fully described and ascertained my said invention and the manner in which it is to be performed, I declare that what I claim is:

1. In an electric water heating apparatus, a receptacle, anelectric heatingbody therein, a water passage leading along said heating. body, and constructed to permit a relatively slow flow of water, another water pas sage shunting the former passage and constructed to permit a relatively rapid flow oi water. a valve inserted. in said shunting passage, coupled with a switch inserted in the circuit of the heatingbody and means tending to open the said valve and the switch.

2. In an electric water heating apparatus. a receptacle, an electric heating body therein, a water passage leading along said heat ing body, ztndeonstrueted to permit relatively slow flow of water, an adjustable throttling screw inserted in said water passage, another water passage shunting the former passage, and constructed to permit arelatively rapid flow of water, a valve inserted in said shunting passage coupled with a switch inserted in the circuit of the heating body and means tending to open the said valve and the switch.

3. In an electric water heating apparatus, a receptacle, an electric heating body therein, a water passage leading along said heating body, and constructed to permit a relatively slow flow of water. a central outlet tube shunting the former passage. and constructed to permit a relatively rapid flow of water, a valve inserted in said outlet tube, a tubular member adapted to slide on said outlet tube and coupled with a switch inserted in the circuit of the heating body and means tending to lift the said tubular member and valve.

4:. In an electric water heating apparatus, a receptacle, an electric heating body therein, awater passage leading along said heating body within the receptacle, and constructed to permit a relatively slow flow of water, an adjustable throttling screw inserted in said water passage, a central out let tube shunting the former passage and projecting from the bottom of said rece tacle, said tube permitting a relatively rapld flow of water, a valve inserted in said outlet tube, a tubular member adapted to slide ZOLTAN TROTZER.

Witnesses EUGENE HAREANY, LI'LI STERN.

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