Electrical resistors – Resistance value responsive to a condition – Force-actuated
Reexamination Certificate
2005-09-13
2005-09-13
Easthom, Karl D. (Department: 2832)
Electrical resistors
Resistance value responsive to a condition
Force-actuated
C338S0220SD, C338S099000, C338S101000
Reexamination Certificate
active
06943660
ABSTRACT:
A current control device is described wherein a pressure conduction composite is compressed and decompressed to alter its conductivity and thereby current conduction through the device. The pressure conduction composite is composed of a nonconductive matrix, a conductive filler, and an additive. The invention consists of electrodes and pressure plates contacting the composite. Electrically activated actuators apply a force onto pressures plates. Actuators are composed of a piezoelectric, piezoceramic, electrostrictive, magnetostrictive, and shape memory alloy materials, capable of extending and/or contracting thereby altering pressure and consequently resistivity within the composite. Two or more current control devices are electrically coupled parallel to increase power handling.
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Bower Bruce
Knowles Gareth
Crilly, Esq. Michael
Easthom Karl D.
QorTek, Inc.
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