Pressure activated switching device

Details Pressure activated switching device Pressure activated switching device

1997-10-29

1999-10-05

Jones, Deborah

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

264 453, 252 629, 338114, B32B 514, B29C 3348

Patent

active

059621184

ABSTRACT:
A pressure sensitive sparkless switching device includes a layer of piezoresistive cellular polymer foam, at least two conductive layers, and an insulative spacer element having at least one opening. When pressure is applied to the device the piezoresistive foam disposes itself through the opening of the spacer element and makes electrical contact between the conductive layers. The resistance of the piezoresistive foam varies with the amount of pressure applied to provide an analog as well as on-off function. The device may also provide multiple switching, and shear detection capabilities.

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