Method and apparatus for measuring the movement of a spiral woun

Details Method and apparatus for measuring the movement of a spiral woun Method and apparatus for measuring the movement of a spiral woun

1980-07-11

1982-07-06

Woodiel, Donald O.

Electricity: measuring and testing

Magnetic

Movable random length material measurement

33127, 73158, G01B 704

Patent

active

043385656

ABSTRACT:
In an apparatus for measuring equipment depth in a well, the movement of wire rope used to raise and lower the equipment is measured by proximity sensors located adjacent the wire rope and spaced along the direction of movement of the wire rope. The signals from the proximity sensors caused by the spiral windings of the wire rope are employed to determine the length and direction of movement of the wire rope. The invention may be employed to measure movement of wire rope in other applications, such as in elevators or with cages in mine shafts that are supported by wire rope.

REFERENCES:
patent: 2466251 (1949-04-01), Martin
patent: 2655633 (1953-10-01), Minor et al.
patent: 3039391 (1962-06-01), Lofthus
patent: 3566478 (1971-03-01), Hurlston
patent: 3978588 (1976-09-01), Richardson et al.

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