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
Adaptive contact window wherein the probability that an answering user/expert will respond to a question corresponds to the answering users having response rates that are based on the time of
Tuning peg for a stringed instrument
Portable electronic device holder and tether
Method of hydrothermal liquid phase sintering of ceramic materials and products derived therefrom
Sealed, waterproof digital electronic camera system and method of fabricating same
Fuel cell module, manufacturing method thereof and unit containing several of the latter
Ice data collection system
  Randomly Featured Patents
Window component extrusion
Adjustable foldable bed
Methods for deconvolution of unknown source signatures from unknown waveform data
In-line static mixer
Neural net prediction of seismic streamer shape
Method for killing bacteria in meat
Method of manufacturing mineral insulated electric cable and like elements
Array processor having grouping of SIMD pickets