Electromagnetic transducer
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United States of America Patent
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Nov 30, 1993
Grant Date -
N/A
app pub date -
Aug 30, 1990
filing date -
Aug 30, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In the electromagnetic transducer disclosed herein, first and second magnetic core structures are oriented in opposition with a space therebetween. In the space between the core structures, an armature is provided for completing magnetic circuits for both of the core structures with respective gaps. Spring means normally centers the armature structure between the core structures so that the respective gaps are nominally equal. On each of the core structures there is provided a first winding and a second winding. The first windings are connected in series to a supply of direct current thereby to bias the magnetic circuits and the second windings are connected to a source of alternating current with the second windings being installed or phased so that one of them aids the corresponding first winding while the other opposes the corresponding first winding.
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