Electric heating element

Details Electric heating element Electric heating element

1981-03-02

1983-05-17

Mayewsky, Volodymyr Y.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

219553, 338217, H05B 300

Patent

active

043841929

ABSTRACT:
An electric heating element for a cooking apparatus or other device requiring uniform heat generation over an extended area is presented in which the resistivity (.rho.), the angular coverage (.theta.), and/or the thickness (T) of the electrically resistive material at any radial distance (r) from the center of the heating element, are in accordance with the relationship .rho./.theta.T is proportional to r.sup.2. The variables .theta. and .rho. may be varied singly, together, or in combination with variation in thickness (T). Heating elements fabricated with cross-sectional shapes calculated in accordance with the relationship set forth above, and disclosed in detail herein, and in which the current flow is radial, provide uniform energy release and therefore nearly uniform temperature across the surface of the element. The absolute element dimensions and masses per unit surface area are small, thereby maximizing rates of desired temperature setting changes. The basic principle is applicable to various technologies related to cooking, wherein an element producing uniform heat generation may be utilized.

REFERENCES:
patent: 563032 (1896-06-01), Hadaway, Jr.
patent: 2700719 (1955-01-01), Coler et al.
patent: 2701296 (1955-02-01), Crawford
patent: 3095492 (1963-06-01), Gaiennie
patent: 3383497 (1968-05-01), Harris
patent: 3851150 (1974-11-01), Von Holzen
patent: 4099071 (1978-06-01), Thornburg
patent: 4233497 (1980-11-01), Lowell

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