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
Web development environment that enables a developer to interact with run-time output presentation of a page
Method and system for quantifying viewer awareness of advertising images in a video source
Systems and methods for controlling registration of advancing substrates in absorbent article converting lines
Sample analysis and/or sample processing system
Phase lock loop with injection pulse control
SRB enhancement on HS-DSCH during cell change
Digital broadcasting system and method of processing data
  Randomly Featured Patents
Swivel barstool
Polysilane compound and synthesis method, ultraviolet-ray curable ink composition, inkjet recording method and apparatus, and ink container
Process for preparing aspartates
Faucet handle
Continuous flexible spacer assembly having sealant support member
Audible sound confirmation of programming change in an implantable medical device
Snap-in display frame
Door system for large primate caging
System and method for maintaining a product specification within regional parameters when selecting options
Centrifugal separator with conical pump inlet