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US 8,410,892 B2Granted
Conductive matrix power control system with biasing to cause tripping of the system
OwnerChester L. Sandberginventor
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OwnerChester L. Sandberginventor
Estimating the term…
A three-terminal device (1, 21, 31) which can operate as an electrical switch, controlled by a third terminal (3, 24, 36/36A) that controls switching the device (1, 21, 31) from a closed circuit (conducting) state to an open circuit (insulating) state. Polymer and/or ceramic materials are loaded with different conductive materials, forming a device (1, 21, 31) having various electrical conductivities depending on local temperature. In preferred embodiments, the device (1, 21, 31) exhibits a non-linear increase or decrease in resistance versus temperature. Various embodiments of the three-terminal devices (1, 21, 31) are disclosed. The third terminal (3, 24, 36/36A) may be a non-electrically conductive biasing element such as a thermal transfer rod or tube containing a variable temperature fluid.
Apparatus comprising:
The apparatus of claim wherein the conductive material is a polymer having a variable non-uniform resistance, said resistance providing the apparatus with specific properties enabling shutting off the flow of electrical power through the apparatus.
Apparatus comprising:
Apparatus comprising:
Apparatus comprising:
Apparatus comprising an electrically conductive material having specific resistance properties as a function of temperature, said apparatus controlling delivery of electrical power to a load, said apparatus further comprising a control means intrinsic to the material for controlling said delivery of power, said control means having a different loading than the remainder of the conductive material, thereby constituting a hotline at a preselected location within the material;
Apparatus comprising an electrically conductive material having resistance properties of a normally loaded structure for control of delivery of electrical power to a load, said delivery controlled by a part intrinsic to the conductive material, said part having a different loading than the remainder of the conductive material to produce a hotline at a preselected location within the material;
Apparatus comprising an electrically conductive material having resistance properties of a normally loaded structure for control of delivery of electrical power to a load, said delivery controlled by narrowing a primary conductive path within the material to produce an area of different loading and thereby promote the formation of a hotline within the material.
Dependencies are inferred from the claim text.