Displacement - electricity transducer

Details Displacement - electricity transducer Displacement - electricity transducer

1974-10-21

1977-03-22

Caldwell, John W.

Communications: electrical

Digital comparator systems

340196, 310168, 324 34PS, 318658, H02P 1310

Patent

active

040139115

ABSTRACT:
A displacement - electricity transducer contains a movable magnetic core and a fixed magnetic core oppositely arranged so as to have predetermined gaps or clearances in at least two places. Two substantially closed magnetic circuits, each including one of the gaps, are formed by both magnetic cores, so that when the movable magnetic core is displaced relative to the fixed magnetic core while maintaining a predetermined spacing therefrom, the substantially opposite area of the gap portion in one of the magnetic circuits increases, while the substantially opposite area of the gap portion in the other magnetic circuit decreases. A first coil is wound around a part common to the two magnetic circuits, while a second coil is wound around a part not common thereto. By applying an alternating current to the first coil, an output responsive to the displacement of the movable magnetic core is derived from the second coil.

REFERENCES:
patent: 3477027 (1969-11-01), Jablonski
patent: 3820094 (1974-06-01), Mouri
patent: 3890516 (1975-06-01), Wibbowson

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