Electricity: measuring and testing – Magnetic – Displacement
Patent
1986-09-19
1987-09-15
Kozma, Thomas J.
Electricity: measuring and testing
Magnetic
Displacement
336136, 34087036, G01B 714, H01F 2106
Patent
active
046942467
ABSTRACT:
The transducer has a primary winding wound around a first cylindrical support which delimits a passage where a core is axially movable, a first secondary winding wound around the primary winding and a second secondary winding wound on a second cylindrical support which surrounds completely the first secondary winding. The first secondary winding is formed in two portions: a regularly wound portion and a stepped portion which are phase connected, and the second secondary winding is formed in two similar portions which are antiphase connected. The output signals of the secondary windings are combined to obtain a differential signal representative of the ratio between the sum and the difference of said signals. The secondary windings are designated so that the ratio cannot reach the value +1 or -1 unless one secondary winding is cut-off, thus conferring to the transducer the capacity of being self-monitored. The separation between the secondary windings avoids any substantial capacitive coupling therebetween, and their mounting on separate supports makes it possible to vary their mutual axial position to adjust the response characteristics of the transducer.
REFERENCES:
patent: 3017589 (1962-01-01), Chass
patent: 3054976 (1962-09-01), Lipshutz
patent: 3138772 (1964-06-01), Persons, Jr.
patent: 3235790 (1966-02-01), Collins
patent: 4052900 (1977-10-01), Ganderton
patent: 4339739 (1982-07-01), Dron
Kozma Thomas J.
Societe Anonyme: Societe Europeenne De Propulsion
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