Moving coil pickup cartridge with diaphragm coupling

Details Moving coil pickup cartridge with diaphragm coupling Moving coil pickup cartridge with diaphragm coupling

1974-12-17

1976-05-11

Cardillo, Jr., Raymond F.

Undertaking

17910041D, 274 37, H04R 916

Patent

active

039565980

ABSTRACT:
A pickup cartridge having a cantilever, a stylus attached to one end thereof, a permanent magnet, a plate and a pole piece made of magnetic material and coupled to the magnet forming a magnetic circuit, a magnetic gap formed between the plate and pole piece, a diaphragm fixed to the plate, a coil attached to one surface of the diaphragm and disposed in the magnetic gap, and an arm contacting with the other surface of the diaphragm and moving together with the cantilever, in which the coil is displaced in the magnetic gap through the arm and diaphragm in response to displacement of the cantilever to induce a voltage.

REFERENCES:
patent: 2032194 (1936-02-01), Wiebusch
patent: 3142729 (1964-07-01), Davis
patent: 3745263 (1973-07-01), Kawakami

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