Electricity: electrical systems and devices – Electrostatic capacitors – Variable
Patent
1978-02-28
1980-03-11
Goldberg, E. A.
Electricity: electrical systems and devices
Electrostatic capacitors
Variable
29 2541, 361299, H01G 506
Patent
active
041931076
ABSTRACT:
A variable capacitor comprising a lower plate and an upper plate which are made of a synthetic material which is suitable for ultrasonic welding, said plates being provided with a number of engaging spacer columns which are integral with the plates and which are connected to each other by ultrasonic welding.
REFERENCES:
patent: 3002871 (1961-10-01), Tramm
patent: 3404322 (1968-10-01), Pepko
patent: 4089093 (1978-05-01), Lefeber
Roozen Johan C. J. A.
Smit Jozephus J. M.
Wagemakers Adrianus J.
Briody Thomas A.
Franzblau Bernard
Goldberg E. A.
Streeter William J.
U.S. Philips Corporation
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