Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1998-07-01
2000-05-16
Dougherty, Thomas M.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310324, 310348, 310351, H01L 4108
Patent
active
06064141&
ABSTRACT:
A piezoelectric switch comprises a housing having an inner surface and an outer surface. A piezoelectric element is mounted on the inner surface of the housing. The piezoelectric element has a top layer made of piezo crystal and a bottom layer made of a conductive metal such as brass. A printed circuit board is disposed within the housing for controlling the state of the switch. The printed circuit board is electrically connected to the piezoelectric element by an electrical conductor. In one embodiment, the electrical conductor is in the form of a flex circuit which has a positive terminal, a negative terminal and a printed circuit board overlay portion that is affixed to the printed circuit board. The flex circuit sandwiches the piezoelectric element therewithin so that the positive terminal contacts the top layer and the negative terminal contacts the bottom layer. In another embodiment, the piezoelectric switch additionally comprises a pushbutton assembly movably mounted on the housing for providing the operator of the switch with a noticeable indication of a change in the state of the switch.
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Dougherty Thomas M.
Piezo Switch Development Inc.
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