Method of measuring variation in the elongation of a very long m

Details Method of measuring variation in the elongation of a very long m Method of measuring variation in the elongation of a very long m

1987-02-20

1988-11-01

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Movable random length material measurement

33127, G01B 704, B65H 6100

Patent

active

047822945

ABSTRACT:
A method of measuring variation in the elongation of a very long element of small transverse dimensions and made of magnetizable material, optionally covered by non-magnetic material, and running between a lower elongation zone and a higher elongation zone, or vice versa, said method consisting in periodically magnetically marking the elongate element simultaneously at two points spaced apart by a predetermined distance therealong in a first one of said zones, and then in detecting the instants at which said magnetic marks pass at least one point situated in the other one of said zones.

REFERENCES:
patent: 2332797 (1943-10-01), Hume
patent: 2580934 (1952-01-01), Love et al.
patent: 2989690 (1961-06-01), Cook
patent: 3466535 (1969-09-01), Sterns et al.
patent: 3702404 (1972-11-01), McDermitt
patent: 3970921 (1976-07-01), Ito
patent: 4041610 (1976-06-01), Uesgui et al.
patent: 4467280 (1984-08-01), Uehara et al.
patent: 4560928 (1985-12-01), Hayward
patent: 4641093 (1987-02-01), Melgui et al.

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