Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Benzimidazole inhibition of biofilm formation
Display screen of a mobile terminal or portion thereof with a graphical user interface
Encryption using alternate authentication key
Method and system for utilizing Perovskite material for charge storage and as a dielectric
SRAM cells using shared gate electrode configuration
Optical angular position detection apparatus and method
Apparatus and method for scrolling a screen of a portable terminal having a touch screen
  Randomly Featured Patents
Screwdriver
Floating hot tub game table
Integrated image scrambling and descrambling
Method and apparatus for extruding melted plastic mixtures
Sunroof device
MOCVD precursors based on organometalloid ligands
Multi-bit-per-cell flash EEPROM memory with refresh
Shutdown methods and designs for fuel cell stacks
Resist cover film forming material, resist pattern forming method, and electronic device and method for manufacturing the same
Toy robot