Resources Contact Us Home
Electric heating element

Image Number 2 for United States Patent #4233497.

An electric heating element for a cooking apparatus or other device requiring uniform heat generation over an extended area is presented in which the thickness (T) of the electrically resistive heating element increases from the outer edges of the generally disc-shaped element towards the center in inverse proportion to the square of the ratio of the radius (r) at any point to that of the radius at a reference point ("a"), so that ##EQU1## Heating elements fabricated with cross sectional shapes calculated in accordance with the parameters set forth above and disclosed in detail herein and in which the current flow is radial, provide uniform energy release and therefore nearly uniform heat across the surface of the element. Additionally, the absolute element dimensions and masses per unit surface area are small, maximizing rates of desired temperature setting changes. The basic principle is applicable in several technologies related to cooking, e.g., vacuum evaporation.

  Recently Added Patents
Method and apparatus for detecting an intermittent path to a storage system
Low-complexity motion vector prediction systems and methods
Differentiated PSIP table update interval technology
Systems and methods for generating customized user interfaces
Electric power steering apparatus
System and method to obtain signal acquisition assistance data
Mineral, nutritional, cosmetic, pharmaceutical, and agricultural compositions and methods for producing the same
  Randomly Featured Patents
Rucksack having folding chair
Circuit to post interconnection device
Method of producing coaxial connections for an electronic component, and component package
Paperboard base for an appliance
Test simulator, test simulation program and recording medium
Image processing apparatus and image processing method
Medical balloon and method of making same
System of linkable cameras, each receiving, contributing to the encoding of, and transmitting an image
Fluoroelastomer members
Processes for the deposition or removal of metals