Device for measuring displacement

Details Device for measuring displacement Device for measuring displacement

1986-03-28

1988-02-09

Stearns, Richard R.

Measuring and testing

Liquid level or depth gauge

Float

324208, G01F 2336, G01B 714

Patent

active

047234466

ABSTRACT:
Herein disclosed is a device for measuring a displacement of a movable member relative to a fixed member by putting the electromagnetic induction into practical use. The device comprises a first coil having first and second coil sections which are coaxially aligned along a common axis, a second coil arranged to establish a magnetic coupling with the first coil and extending along the common axis, and a short circuit ring arranged to establish a magnetic coupling with the first and second coils and movable relative to the same. The winding density of each of the first and second coil sections is gradually decreased from the outside end to the inside end thereof, and the winding density of the second coil is substantially even throughout the length of the same.

REFERENCES:
patent: 2424766 (1947-07-01), Miner
patent: 3235790 (1966-02-01), Collins
patent: 3495456 (1970-02-01), Ohno
patent: 4282485 (1981-08-01), Pauwels et al.
patent: 4623840 (1986-11-01), Fujimura et al.

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