Electricity: electrical systems and devices – Electrostatic capacitors – Variable
Reexamination Certificate
2006-07-11
2010-02-23
Thomas, Eric (Department: 2831)
Electricity: electrical systems and devices
Electrostatic capacitors
Variable
C361S277000, C361S287000
Reexamination Certificate
active
07667947
ABSTRACT:
An operating control device, such as for an appliance, is disclosed comprising sensor elements with a capacitive sensing function, the elements being located underneath a metallic surface that is used as the operating field. An insulating layer is situated between the elements and the metallic surface. When pressure is applied to the metallic surface the capacitance of the sensor element is altered by capacitive coupling. This alteration of capacitance can be determined by a corresponding evaluation circuit or the like for detecting activation of the device.
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Dorwarth Ralf
Schilling Wilfried
Alston & Bird LLP
E.G.O. Elektro-Geraetebau GmbH
Sinclair David M
Thomas Eric
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