1980-12-02
1983-11-08
Fuller, Benjamin R.
H04R 904
Patent
active
044144377
ABSTRACT:
In an electromagnetic transducer including a member producing a magnetic field and presenting an air gap traversed by the field, a mass of magnetic liquid extending across the air gap, and a moving coil mounted on a moving coil carrier supported for movement through the air gap, the carrier is provided with at least one passage located to communicate with the magnetic liquid during at least part of the movement of the coil carrier through the air gap for permitting flow of magnetic liquid from one side to the other of the carrier in the direction of the air gap.
REFERENCES:
patent: 2020814 (1935-11-01), Van Uok et al.
patent: 3792394 (1974-02-01), Bertagni
patent: 4017694 (1977-04-01), King
Thiele Karl-Heinz
Trauernicht Herbert
Fuller Benjamin R.
Licentia Patent-Verwaltungs-GmbH
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