US1524075A - Electric stove - Google Patents

Description

Jan, 27, 1925.

F. YOKEL ELECTRIC sTovE Filed J'an. 4 1923 Patented Jan. 27, 1925.

,PATENT OFFICE.

FRANK YOKEL,` OF PITTSBURGH, PENNSYLVANIA.

ELECTRIC STOVE.

Application filed January 4, 1923. Serial No. 610,675.

To @ZZ ttf/Laml it fma'e/ concern Be it known that I, FRANK Yoniin, a citizen ot the United States, residing at Pittsburgh, in the county ot Allegheny and State of Pennsylvania, have invented. certain new and useful Improvements in Electric Stoves, of which the following is a specitication.

This invention is for an electric heating stove of a type which utilizes both radiation and convection for the distribution ot.' heat.

Many 'electric heaters are now on the market for domestic use. One type employs a coil ot resistance ,wire on a porcelain spool or other support disposed in front ot a reflector. The resistance material, in this case, being wound about insulation, does not have a tree circulation ot air thereabout, and little consideration is given to the distribution of heat by warming the air by contact with a heating element.

In another type ot heater, the heating elements are in the form of an incandescent bulb having resistance elements therein instead ot lila-ments, these bulbs being disposed in front of a back reflector wall. In this type of heater, the air is not heated to any considerable extent, although some ot it is heated, ot course, by contact with the exterior of the bulbs.

The present invention has for its principal object to provide a stove of simple construction and pleasing appearance, in which the 'fullest advantage is taken of heating the air by Contact with the resistance elements, as well as distributing heat by radiation.

My invention may be readily understood by reference to the accompanying drawings, in which:

Fig. 1 is a front elevation of a stove embodying my invention, certain parts, however, being shown in section;

Fig. 2 is a section in the plane ot line II-II of Fig. 1,

Fig. 3 is an enlarged view ot the lower end ot one of the heating units;

Fig. 4 is a top view of a detail part of the stove.

In the dra-wings, A designates the stove generally, which is shown as being formed generally of sheet metal 5. At 6 is a sheet of reflecting material, such as copper, having inwardly converging side portions 7 and a flat back portion S. Supported in the stove trame, near the bottom thereof, is a metal or other suitable strip 9 having openings 10 therein. Near the top ot the stove tra-inc is a similar cross piece 11 having openings 12.

Secured to the lower cross piece over the openings therein, are blocks 13 of insulating material. These blocks carry connectors 14, 15, 16 and 17. rlhe upper cross piece 11 has similar blocks 13 of insulating material thereon, which blocks carry connectors 14 15', 16 and 17 thereon.

Removably secured between each pair ot connectors, one lower and one upper one. as between connectors 14 and 14, 15 and 15', 16 and 16, and 17 and 17', is a heating unit B. This unit comprises a pair ot' rings 18, as shown in detail in Figs. 3 and 4, having a vertical tlange 19 and an inwardly extending web 2O with an outwardly turned terminal 21 which is secured to its respective connector by a bolt 22. The inwardly extending web carries a connector 23, to which one end o1 a helical resistance coil 24 is secured. Retained in position by the rings 18 and surrounding the coils, is a glass tube 25.

I have shown a stove having four of these heating units, though any desired practical number may be used. They are shown as being connected in series with the line connections at 26 and 27. but this arrangement can, ot course, be varied.

In operation, the coils 24 are heated by passing an electric current therethrough. As they become heated, heat waves are emanated in all directions, but their travel is confined by the reflecting surfaces 7 and 8. The air in the tubes 25 is also heated by contact with the hot wires, and escapes through the top of the tubes, which, due to the construction of rings 18, are substantially open. The lower rings 18 enable fresh cold air to come into the tubes from the bottom. Each tube thus becomes a flue, and

the flow ot air around the hot coils is ac- 100 celerated, and a definite tlow of air is secured.

Due to the fact that the coil is stretched between the rings at opposite ends of the tube, no support such as porcelain is necessary, and the air thus has free circulation about every part of the resistance element.

The fullest advantage is thus taken of heating by convective* air currents, as Well as by the radiation of heat Waves 'from a hot element.

Various changesamay be made in the details of construction of my invention Within the contemplation of my invention, and under the scope of the `appended claims.

I claim as my invention:

l. kIn an electric heater, a heatingr unit *comprising a resistance coil, an open-ended tube, and supportingineans for the tube att each end thereof comprising a ring having i connectorthereon. I

' 2. An electric stove comprising arsupporting frame, having u recessed back Wall7 upper and lower cross pieces secured in said stove 'in frontv of said back Wall,V connectors lcarried by sid upper and lower cross pieces, ndV a' series of'vertically disposed heating units removably connected at their upper and vlower ends with said connectors, each Vheating `unit comprising a. resistance element, an open-ended tube around said ele-` 'heating units .including a resistance element` and a surrounding open-ended tube each unit having a lug at its top and b ottom comprising @supporting means and a 1 conductor, said lugsbeing removably joined to the cross pieces. Y

4. Aheating unit. for electric` stoves comp rising an' open ended glass tubeia metal ring at each end of the tube'having a longitudinally i extending lug, and a resistance element Within the tube having its opposite ends connected with the rings at the re? Vspective ends of the tube.

In testimony whereof I affix my signature.

FRANK YoirnL.

Images