Electrostatic transducer backplate having open ended grooves

Details Electrostatic transducer backplate having open ended grooves Electrostatic transducer backplate having open ended grooves

1979-07-05

1982-01-19

Brigance, Gerald L.

179111E, H04R 1900

Patent

active

043118810

ABSTRACT:
The desired groove shape in a backplate of a combination transmitting and receiving, capacitance type, electrostatic transducer are more consistently reproduceable in a die forming operation by utilizing an open ended grooved configuration so that groove shape deforming lubricating fluid, necessary in said die forming operation, and air, can escape from between the die tool and the transducer backplate through said open ended grooves as said grooves are die formed on said backplate.

REFERENCES:
patent: 3373251 (1968-03-01), Seeler
patent: 3930128 (1975-12-01), Fidi et al.
patent: 4070741 (1978-01-01), Djuric
patent: 4081626 (1978-03-01), Muggli et al.
patent: 4085297 (1978-04-01), Paglia
patent: 4199246 (1980-04-01), Muggli et al.

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