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
Focus adjustment unit and optical scanning microscope
Systems for usage based rate limiting over a shared data link
Drive and startup for a switched capacitor divider
Fuser member
Event-associating software application for accessing digital media
Time sharing type autostereoscopic display apparatus and method for driving the same
Cooler
  Randomly Featured Patents
Average code generation circuit
Filing cart for educational assessment portfolios
Silver halide multilayer color photographic material containing couplers having different coupling rates
Anti-neoplastic, anti-viral and ribonucleotide reductase activity affecting pharmaceutical conpositions and methods of treatment
Reception apparatus, reception method, transmission apparatus, transmission method, transmission-reception apparatus, and transmission-reception method
Cellular radiotelephone with dialed number analysis
Optical system design for a universal computing device
Transition metal catalyst component for polymerization, and method for producing a polymer by means thereof
Clamping system
Integrated touch screen