US1715520A - Electric heater - Google Patents

Description

June 4, 1929. L. SHUMAN ELEGTRiG HEATER Filed Jan. 29, 1926 INVENTOR.

ATTORNEY Patented June 4, 1929-.

tux-552s PATENT OFFICE.

LEO SHUMAN, OF SPOKANE, WASHINGTON.

ELECTRIC HEATER.

Application filed January 29, 1926. Serial No. 84,720.

Thisinvention pertains to heating apparatus, and particularly to the use of electricity for the heating of water and circulating the steam generated therefrom through radiators for the raising of the temperature of rooms and buildings.

The object of the invention is to so combine electric heating units with a boiler and to so connect the boiler with radiators, that a measure of water may be filled into the boiler and distributed to the heating units in small quantities, so that small heating units will rapidly turn the water into steam within the boiler, from whence the same is dis tributed throughout the radiators and after condensation has taken place within the radiators, the same is returned to the boiler for re-heating. I

Means are provided for distributing water for the boiler from a tank, to which the condensed steam returns for re-distrilnition to the boiler.

Automatic means are provided for maintaining a liquid level within the boiler and for maintaining a substantially uniform steam pressure therein. 7

It is recognized that in order to bring electric heating to a general commercial use, that the greatest possible efliciency must be obtained from the amount of electricity used, and it is with this idea in view that the details of the heater are constructed and arranged.

The invention will be hereinafter particularly described, illustrated in the: accompanying drawings and pointed out in the appended claims. In the drawings, Fig. 1 is a side elevation of the heater and connections, with a plate removed, showing means for maintaining a liquid level within the boiler. Fig. 2 is a central vertical sectional view of the same.

In a detail description, in which like numorals refer to like parts throughout the several views, the boiler 10 has side walls 11 connected with a base 12 by means of bolts 13. A central cavity 14 is formed on the base 12 by means of a plate 15 elevated by means of an annular rim 16, through which are openings 17. Mounted in an opening through the center of the plate 15 is a tube 18, the same being open at both ends, the lower end thereof opening into the cavity 14. Passingthrough the base 12, cavity 14 and plate 15, are conduits 19 and20. Mounted on top of the plate 15 is an annular electric heating element 21. Surrounding the tube 18 is a conduit 22, having an annular flange 23 at the bottom thereof, the same forming a covering for the heating element 21, and an annular flange 24 near the top thereof, forming a base for an electric heat ing element 25. An annular basin 26 surrounding the tube 18, forms a covering for the heating element 25. Bolts 27 secure the flange 23 and the plate 15 together and bolts 28 secure the basin 2G and the flange 24 together. Flues 29, open at both ends, extend through the flanges 23 and 24 and through the water area of the boiler 10 and reach to the heating elements 21 and 25. Mounted over the top of the tube 18 is a cap 30 having a connecting portion 31. An opening 32 through the portion 31 connects with a cavity 33 in the cap 30. Openings 34 are provided in the bottom portion of the cap 30. A t'ansparent gage 35 has connections by reaching tothe interior of the boiler 10, and indicates the liquid level therein. Electric connection 3'? is made through conduits 19 and 22 with the heating element 25 and electric connection 38 through the conduit 20 with the heating element 21. The electric connections 37 and 38 are ointed to external wiring 39 and 40, respectively, at the binding posts 41. A threaded aperture 42 is provided at the top of the boiler 10 as a means for connection with a conduit leading to the point where the steam is used.

A liquid level 44 (Fig. 1) is maintained in the boiler 10 by means of a float controlled valve 45, mounted in the feed pipe 46 leading from a superimposed tank. A conduit 52 (Fig. 1) leads from the dome 53 of the boiler 10, whereby the steam pressure therein operates an electric switch mounted in a casing 54, wherein the wires 39 and 40 are operatively connected with wires 55 and 56 leading to a source of electric supply.

A gage 61 indicates the steam pressure in the boiler 10.. It is estimated that substantially a one pound pressure will be required to maintain a proper and suitable temperature in a living room.

The boiler 10 is covered by a heavy insulation 62 to prevent undue radiation of heat therefrom.

In the practical operation of the heater,

the fiues 29 scattered throughout the water area of the boiler 10 and extending from oneheating element121 to the other '25, keeps the water at a high temperature and water 'boiler'near the bottom thereof, an enclosure to'said'heatin 'element, means for-a; water" circulation around said enclosed heating element, a' tube, open at bothends. extending througlisaid enclosed heating element and upwardly, therefrom to a point above the waterareatherein, an enclosed electric heating-element mounted near the upperend of said tube andsurroundingthe same, tie upper surfaceof theenelosure of such-heating element being receptive to heat, electric connections; withthe heating elements, a steam outlet and a. water inlet to the boiler and fines extending from oneheater to the other and connected therewith.

2. An electric heater comprising en closure adapted to holdwa-ter, a pair oi? enclosed electric heating elements monntedin the enclosure; fines reaching from one ele ment to the other, said flues'being-partially surrounded by the water in the heater, a water connection leading from the lower elea ment to-tlieupper element, said fines assisting inhea'ting the water for'ced up through said'con-nection.

3; A heating system including'au electric heater comprising an enclosure adapted to hold' water; two separated electric heating elements in said enclosure, one below the 7 water and'the other above the water in said enclosure; a plurality'of flues'hav-ing a pertionot 'their exterior surfaces immersed in thewat'er inthe heater an d extending from the lower"heating'element and projecting above the water and connecting with the other heating elementa plurality of radiatheir exterior conduit havingan annular flange at-thetop; a second: heating element mounted onsaid tors and connections between said radiators and the upper part of said enclosure.

' 4-. An electric heater comprising an en-' closure adapted to hold 'water, two separated electric heating elements mounted in .said enclosure, one immersed, in the water therein and the other outside of the water,

.and'aplurality of flues having a portion'of closure adapted tohold water, two electric heating elements, one above the other, a tube extending through the upper. heating ele= ment and projecting downwardly therefrom, and a plurality of lines liaVinga-portion of surfaces immersed in the water in the heater and interposedbetween thetwo heating elements.

6; An electric heater comprising an 5311f closure adapted to holdlwater, two electricheating elements one above the otheig a tube extending through the upper heating-"element and projectingdownwardly there from, a plurality of fiues interposed between" the two heating elements, means torpr'eventing the'water-from entering sa1d-fiues, and means for moving water through said tube.

closure adapted to hold water, a plate spaced from the bottom of the enclosure; air

electric heating element niountedon said plate, a tubeextcnding through. said plate a conduit sin-roundingsaid tuhehav-ine' an annular flangeat the bottomw-hichprojects over. and pro ects sald; heating-element; said annular'fiange a series of fiues open atboth ends and extending through said" annular fiztnges; so-a s' to-he heated by said 'heating' elements, said tube passing up through said upper heating element, an annular basin surrounding'said tulie and acting asa coverfor the upper heatmg'element, and means for delivering heated water through said tube to said basin.

1 Leo SHUMMLV v In testimony whereof I'afiix my signature.

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