Electricity: electrical systems and devices – Electrostatic capacitors – Variable
Patent
1980-03-17
1982-05-11
Goldberg, Elliot A.
Electricity: electrical systems and devices
Electrostatic capacitors
Variable
73718, 361399, H01G 700
Patent
active
043297323
ABSTRACT:
Two square plates of ordinary inexpensive soda lime glass are spaced apart from one another, and are sealed together by a ring of glass frit, with the two plates overlying one another, but with the corners of the two plates displaced so that the corners of each of the two plates extend past the sides of the other plates. The plates may be spaced apart by a small distance, for example, from about 1/2 to several thousandths of an inch, and thin conductive layers on the two facing surfaces form a variable capacitor which changes in capacitance when pressure is applied to the outside of the two plates. Connections for the conductive plates extend out to the corners of the plates beyond the sides of the other plate to permit easy access. Electrical connections are made through the use of elongated conductive rubber elements. Silicone rubber gaskets and suitable plastic housing members including electrical shielding are employed to mount the capacitive transducer and its associated output hybrid electronic circuit which assembly may be mounted on a ceramic substrate.
REFERENCES:
patent: 2751530 (1956-06-01), Armstrong
patent: 2808545 (1957-10-01), Hirtreiter
patent: 4064550 (1977-12-01), Dias
patent: 4128006 (1978-12-01), Grabow
patent: 4168518 (1979-09-01), Lee
patent: 4184189 (1980-01-01), Davis
patent: 4207604 (1980-06-01), Bezl
patent: 4238662 (1980-12-01), Lao
Affel John J.
Kavli Fred
Park Kyong
Goldberg Elliot A.
Kavlico Corporation
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