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
Connector with shielding device and method for manufacturing connector
Eyeglasses
Apparatus and method of managing radio bearer in wireless communication system
Power control arrangement for long term evolution time division duplex method and apparatus
System and method for internet based procurement of goods and services
Method for producing an adhesive fastening element made of plastic
Method and apparatus for generating images using a color field sequential display
  Randomly Featured Patents
Single horizontal drive for a vehicle seat
Photographic and video image system
High pass switched capacitor filter section
Gift wrapping box
Graphic user interface schemes for supporting speech recognition input systems
Three-part folding roof for convertible vehicles
Multi-thread graphic processing system
Semiconductor devices and methods of forming interconnection lines therein
Electricity meter using fuzzy logic circuit
Method of attaching die using self-assembling monolayer and package substrate including die attached thereto using self-assembling monolayer