US1968776A - Electric heater - Google Patents

Description

July 31, 1934. R. F. SCHNEIDER ELECTRIC HEATER Filed oct. 1e, 195s Patented July 31, 1934 UNITD ST ATENT orties 3 Claims.

This invention relates to electric heaters, and particularly to electric heaters of the mono-unit type.

The principal object of the present invention 5 is to provide an electric mono-unit heater constructed of concrete or the like, as contradistinguished from electric mono-unit heaters made of metal or the like.

Other objects of the invention will be readily lO apparent to those skilled in the art upon refern ence to the following detailed description of an embodiment of the invention, shown in the appended drawing whose Fig. l is an elevational section view of the ein bodiment as if on line l-l of Fig. 2; and whose Fig. 2 is a right end view of the embodiment.

Referringr to the drawing, it will be seen that the embodiment there disclosed comprises a concrete radiator and heater body l0 generally in the form of a prism, the body having a hollow interior 11 lined with a sheet metal box 12, preferably of galvanized iron. The body is formed with grooves 14 of inverted U shape which provide radiating ribs 15 on the two vertical sides and on the horizontal top of the body, the bases of the grooves being spaced far enough away from the lining l2 so as to leave a shell of concrete all around the lining.

fassed through aligned apertures in an end wall of the body 1G and in an end wall of the lining l2 and embedded in the wall of 'the body 1U is a supporting pipe 16 on the exposed threaded end of which is an internally threaded cap 1T upon which is mounted a multi-station switch 18 provided with a switch knob or button 19.

` The switch is mounted cn the exposed end of a small bore tube which passes into the box 12 through a hole in the cap 1*?, and which is surn rounded by heating coils 2l. 1t is preferred to 4o have the coils 2l so Wound and interconnected that the multi-station switch 18 will apply loads of 100D watts, 500 watts, 250 watts, or 0 watts, depending upon the position given to the knob 19 by the operator, in accordance with well known practice in electrical heater construction.

The tube 16 is sealed at its exposed end by the cap 17 and accordingly the hollow interior 1l remains sealed from the outside of the radiator, despite the presence of the electrical heater.

It will also be observed that the cap plate 17 and the electrical heating element carried thereby, including parts 18-21, are removable as a unit from the threaded exposed end of the embedded tube 16 and accordingly removal and replacement of the heater for any purpose whatever can readily and easily be elfected.

Passing through the body 10, from end to end thereof, and through the lining 12, and the sealed hollow space 1l, are hollow tubes 26 whose open 6 ends are provided with control valves 27 of the rotatable shutter typeL These tubes and their shutters are provided to permit a circulation of air through the tubes 26 in sealed relation, to the sealed space 11, so that, when desired, a room may be heated quickly by opening the shutters 27 and permitting the air passing through the tubes 26 to be heated by the heated air in the sealed space 11.

Passing through the body 10 from end to end thereof, but above the lining 12, are tubes 28 having on their open ends shutter control Valves 29, and these tubes also permit the circulation of air through the radiator, whenever desired, to enhance the heating action of the radiator, the circulating air in these tubes being heated by the heated concrete of the body.

inasmuch as the radiator is made of concrete, it is desirable to reinforce the same and accordingly reinforcing means are provided. Among such means are the tie rods 31, passing through the body from end to end, above the lining 12 and the tubes 28, and tie rods 32 passing through the body from end to end below the lining 12, the tie rods having on their ends, heads and nuts to maintain them in place, the heads and nuts being embedded in the end walls of the body so as to lie flush with the surface thereof.

There are also provided vertical reinforcing rods 34 having their lower ends embedded in the legs 35 at the corners of the body, the rods passing upwardly near the opposite ends of the lining l2.

There is also provided for the radiator a transverse rib 36 whose contour is similar to that of the legs 35 and this transverse rib, aids in supporting the unsupported span of the body, from one pair of legs 35 to the other. Passing upwardly from the rib 36 and into the body of the radiator are a plurality of vertical tie rods or bolts 38 and these have their lower ends embedded in the rib 36 and their upper ends terminating short of the lining 12.

The various reinforcing rods or bolts 34 and 38 have on their ends heads and nuts, in accordance with proper practice.

The foregoing described embodiment has proven eflicient and satisfactory in all essentials. The radiator described can be built at far less cost then heaters of equivalent performance and crete or a like material, the radiator, when once* heated, will retain its heat for a considerablelength of time, after the current has been turned 01T.

Other advantages and Yfeatures will readily be apparent to those Well acquainted'with electrical heating problems and the manufacture of elec-- trical heaters, and will not here be enumerated for purposes of brevity.

Now having describeda preferred embodiment,

which embodiment is disclosed by way of conrpliance with the statutes made andA provided in such cases, and which disclosure is notfintended as limitingl the invention to the specic details 'of'construction here' disclosed, reference wil-l be had to the appended claims for determination of the scope ofthe invention.

I claim:

l. An electrical heater of the class described comprising a hollowy concrete radiator whose hollow interior is sealed 'from the outside of the radiator, an electrical heater` passing through an end vwall of said radiator and into the sealed hollow space thereof and having an eXteriorly projecting portion provided with a control for the heating vunit of the heater, a sheet metal lining for the sealed hollow space, a tube passing through opposite endV walls of said radiator, lining, and space and having open ends whereby air for the sealed hollow space, a tube passing lthrough opposite end walls of said radiator, 1ining, and space and having open ends whereby air may circulate therethrough, the tube being sealed from the space, and valves on the ends of the tube, and a second tube passing through opposite endrwalls of said radiator, remote from said lining and space and also having open ends the sideand top of the radiator being grooved to provide radiating pins therebetween.

3. An electrical heater of the class described comprising a hollow concrete radiator whose hol-low interior isfsealed from the` outside of the 100 radiator, an electrical heater passing through an end wall of said radiator and into the sealed hollow space thereof and having an exteriorly projecting portion provided with a control for the heating unit of the heater, a sheet metal 195 lining for the sealedhollow space, a tube passing through opposite end walls of said radiator, lining, and space and having open ends whereby air may circulate therethrough, the tube beinglsealed from thefspace, and valves on ythe ends of .the 111g tube, and a second tube passing through opposite end walls of said radiator, remote from said lining and space and also having valve controlled open ends the sides and top of the radiator being grooved to provide radiating pins therebetween. 335

' RALPH F. SCHNEIDER.

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