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
Permanent magnet axial field zeeman slower
Selective thermal treatment of medical instrument portions with thermal treatment system instrument holder
Active pulse blood constituent monitoring
System and method for oscillator frequency control
Wristwatch
Faucet
Placental tissue grafts
  Randomly Featured Patents
Image processing device
Main bang recovery EMAT
Bottle
Gearbox with retarder
Low loss composition of BaxSryCa1-x-yTiO3: Ba0.12-0.25Sr0.35-0.47Ca0.32-0.53TiO3
Arrow package
Inner pot for electrical rice cooker
Liquid crystal display device
Extrudable thermoplastic hydrocarbon compositions
Hat size maintainer