US2127425A

US2127425A - Electric stove

Info

Publication number: US2127425A
Application number: US7238A
Authority: US
Inventors: Abe O Samuels
Original assignee: SAMSON UNITED CORP
Current assignee: SAMSON UNITED CORP; SAMSON-UNITED Corp
Priority date: 1935-02-19
Filing date: 1935-02-19
Publication date: 1938-08-16
Anticipated expiration: 1955-08-16

Description

Aug. 16, 1938. A. o. SAMUELS ,4

' ELECTRIC STOVE Filed Feb. 19, 1935 INVENTOR A950 54/70546 ATTORNEY Patented Aug. 16, 1938 2,127,425

UNITED STATES PATENT OFFICE ELECTRIC STOVE- Abe O. Samuels, Rochester, N. Y., assignor to Samson-United Corporation, Rochester, N. Y.

Application February 19, 1935, Serial No. 7,238

10 Claims. (01. 219-37) This invention relates to electric stoves and has central supporting member and suitable supfor its object to provide such a stove with a

porting ribs

5A, 5A which extend radially from louvered grid which permits direct heat radiation the central supporting member within the confrom the heating unit but prevents metal objects centric supporting ridge 4. The ribs 5A or other 5 generally used around the stove from coming into suitable structure of platform 3 provide for ex- 5 contact with any portion of the heating coil of pansion and contraction of platform 3. the heating unit. The supporting members thus provided by the A further object of this invention is to increase grid, together with the platform 3, are struck the strength of the stove frameby forming the up from the underside of the top of the casing grid integral therewith. and form an integral part thereof. The se% 10 Another object of this invention is to provide mental sections of the platform 3 between the a novel form of suspension for the heating unit elevated supporting members of the grid have of the stove. the angularly projecting louvers 6, 6 struck up All these and other objects of this invention will therefrom. In the form illustrated in Figure 1,

become more readily apparent from the detailed these louvers are concentric to the grid and in- 15 description thereof which follows, reference becline upwardly toward the center thereof and ing had to the accompanying drawing in which are so arranged that their outlet openings be Figure 1 is a top plan view of the electric stove. tween the upper edge of one louver and the lower Figure 2 is a vertical sectional view of the stove, edge of the succeeding louver are restricted and the section being taken on the line 2-2 of Figare located in a substantially vertical plane so 20 ure 1. that no object used around the stove can be con- In the figures like reference numerals indicate veniently inserted or dropped therethru. Thus like parts. as shown particularly in Fig. 2, the louvers may In electric stoves in which the heating coil of be formed as oblique bar members positioned so 5 the heating unit is located in suitable grooves that the upper edge of one bar is substantially in provided in a base of refractory material and the register with the lower edge of an adjacent bar. heating coil is thus exposed so that any metallic The heating unit I is made up of a suitable reimplement can be brought in contact therewith fractory material and is provided with open and accidentally provide a short circuit between grooves 8 into which is nested the heating coil 9.

3 it and the stove frame, the requirement of the The heating unit is fastened to the underside of Board of Underwriters makes it necessary to prothe grid and its louvers by means of a pair of vide such a stove with a two-pole switch so that p g screws l0 and I l and the cover I2. This the heating unit is completely out out of the elecver i h nn l sh p d nd extends across the trio circuit whenever the switch is opened. In bottom of the heating unit with its outwardly my present invention this requirement has been flaring flanges 3 a d resting against the bot- 35 eliminated by the use of a grid provided with tom of the heating unit. The clamping screws louvers which cover the heating unit and prevent p oject t u e d, the edges of t e he the insertion of any implement used around the unit and thru the flanges I3 and M of the cover stove to make contact with the heating coil, to have the clamping nuts I5 which are threaded 40 These louvers are arranged so that they do not onto the bolts, simultaneously clamp the cover i2 40 obstruct the radiation of heat from the heating in t bottom of the h n ni and th unit and thus will not affect the efficiency of the eating unit against the bott of t e d and stove. The use of a single pole switch is theres ouv rs. fore now permissible with this type of heating The COVeI thus forms a Shield st t e unit and makes it possible to simplify the condirect radiation of heat from the bottom of the 45 struction of the stove and reduce the cost of manheating unit and p v a a r Chamber which ufacture thereof. extends along the bottom of the heating unit As illustrated in the figures of the drawing, the from which the heat radiated from the bottom of electric stove comprises a metal casing I which is the heating unit, Can escape thrll the p s supported on

suitable legs

2, 2. The casing is 16, IS in the sides of the cover. The heat from 50 open at the bottom and closed on all sides and the bottom of the heating unit is thus laterally the top and in the closed top is struck up a grid distributed in the casing so that part of it can which, in the present instance, comprises a slightescape thru the openings I! provided in the top ly elevated circular platform 3 bordered by a conof the casing on the outside of the grid. In this centric supporting ridge 4 and provided with a way excess heat from the heating unit is dissi- 55 pated and is not radiated against the table top or other supporting surface on which the stove is supported.

From an inspection of Figure 2 of the drawing, it will be apparent that the louvers 6, 6 overhang the groove 8 and the heating coil 9 located therein so that this heating coil is fully protected and no metal object or implement dropped onto the grid of the stove can enter the groove and cause a short circuit between the heating coil and the casing of the stove. The switch I8, located at one end of the air chamber, provided by the cover l2, can therefore be a single pole switch for the control of the electric current as the danger of causing a short circuit between the heating coil and the stove casing has been eliminated by the use of the covered grid over the heating unit, as pointed out above.

I claim:

1. In an electric stove the combination of a metal top, a grid formed integral in said top, louvers struck up from said grid, a heating unit, a cover for the bottom of. said heating unit and clamping means for clamping said cover against said heating unit and said heating unit against the under side of said grid.

2. In an electric stove the combination of a stove top, a grid provided in said stove top, louvers in said grid to provide lateral openings therein, a heating unit fastened to the under side of said stove top, a substantially U shaped cover on the under side of said heating unit having openings in the side thereof and providing a shield for the bottom of said heating unit with an air chamber between it and said shield.

3. In an electric stove the combination of a grid having a substantially circular supporting ridge, radially arranged supporting ridges within said circular ridge dividing said grid into segmental sections, angularly disposed and concentrically arranged louvers struck up in said segmental sections of said grid and inclined toward the center of said grid.

4. In an electric stove the combination of a casing closed on all sides and the top and open at the bottom, an electric heating unit comprising a plate member of refractory material with a heating coil embedded therein, a hollow cover, and clamping means for clamping said hollow cover against the bottom of said plate member and said plate member against the under side of the top of said casing.

5. In an electric stove as set forth in claim 4 in which the top of. the casing is provided with louvered openings above the heating unit.

6. In an electric stove the combination of a sheet metal top, a sheet metal casing surrounding said sheet metal top, a heating unit mounted within said casing below said sheet metal top, circularly arranged louvers inclined toward a common center provided in said sheet metal top and expansion means provided in said sheet metal top and dividing said louvers into segments so as to provide lateral expansion between the louvered sections of the sheet metal top.

'7. In an electric stove the combination of a. sheet metal casing, a sheet metal top for said casing, a grid raised on said sheet metal top, concentrically arranged louvers inclined toward a common center provided in said grid, a heating unit clamped to the under side of said grid and a cover clamped to the bottom of said heating unit within said casing to provide an insulating chamber between said heating unit and the table top on which the electric stove is supported.

8. In an electric stove, a grid having a substantially circular supporting ridge and being provided with substantially radially arranged a means dividing said grid into sectors and adapted to permit expansion and contraction of said grid, an electric heating unit supported on the under side of said grid and adapted to rediate heat upon said grid, and a plurality of relatively long arcuate louvers provided in said sectors of. said grid and inclined toward the center of said grid.

9. In an electric stove, a metal top, a grid provided in said metal top and having a substantially circular supporting ridge and being provided with substantially radially arranged means dividing said grid into sectors and adapted to permit expansion and contraction of said grid, an electric heating unit supported on the under side of said grid and adapted to radiate heat upon said grid, said grid being provided in said sectors with a pluralityof substantially parallel bar members positioned obliquely of said grid and with the upper edge of one bar substantially in register with the lower edge of an adjacent bar.

10. In an electric stove, a plate comprising a grid area bounded by a ridge of substantially circular contour, said grid area being provided with substantially radially disposed supporting ridges dividing said grid area into sectors, a plurality of arcuate louvers formed in said sectors and being substantially parallel with said circular boundary ridge, and an electrical heating unit supported on the under side of said grid area and adapted to radiate heat upon said grid area.

ABE O. SAMUELS.