Electricity: measuring and testing – Magnetic – Displacement
Patent
1989-10-26
1991-07-30
Snow, Walter E.
Electricity: measuring and testing
Magnetic
Displacement
32420722, 32420723, 32420724, 324207, 324 25, 34087031, 336 45, G01B 714, H01F 2102, G08C 1906, G08C 1912
Patent
active
050362755
ABSTRACT:
A position sensing device including two spaced conductive coils constituting a primary and secondary winding of a transformer. A coupling member is mounted to a moveable object such as an automobile steering mechanism and moves relative the primary and secondary windings. This movement adjusts or alters the transformer coupling between the primary and the secondary and produces a variable output signal which can be correlated through use of appropriate circuitry to the position of the moveable member. Two alternate designs are disclosed. In a first design, the transformer primary and secondary are disposed side-by-side and the coupling member slips over the primary and secondary for relative linear movement. In a second design, the primary and secondary are disposed one within the other and the coupling member fits within a gap between the primary and secondary.
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William Brenner, "Magnetostrictive LDTs are Precise, Built Tough", I & CS, Sep. 1989, pp. 45-47.
Cooper Stephen R. W.
Munch Carl A.
Rymut Michael J.
Nartron Corporation
Snow Walter E.
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