Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Reexamination Certificate
2006-02-14
2006-02-14
Dinkins, Anthony (Department: 2831)
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
C361S311000, C361S313000, C073S718000, C340S438000
Reexamination Certificate
active
06999301
ABSTRACT:
A capacitive load cell apparatus includes upper and lower capacitor plates and an intermediate dielectric in the form of a synthetic knit spacer material having upper and lower fabric layers interconnected by an array of deflectable synthetic fibers. When occupant weight is applied to the seat, the synthetic fibers deflect to locally reduce the separation between the upper and lower capacitor plates, and the consequent change in capacitance is detected as a measure of the applied weight. The load cell or just the dielectric may be encased in a polymeric sheath to prevent intrusion of foreign matter, and a fluid such as silicone may be dispersed in woven dielectric.
REFERENCES:
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patent: 5159316 (1992-10-01), Lazzara
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Berg Eric M
Fultz William W.
Griffin Dennis P.
Murphy Morgan D.
Sanftleben Henry M.
Delphi Technologies Inc.
Dinkins Anthony
McBain Scott A.
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