Magnetic tape tension sensor

Details Magnetic tape tension sensor Magnetic tape tension sensor

1982-11-29

1985-12-10

Christian, Leonard D.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

242 7552, 226 45, 250559, G03B 104, G11B 1532, B65H 5938

Patent

active

045574359

ABSTRACT:
A tape tension sensor unit comprised of a light source; a light detector; a rotating arm member having disposed thereon a plurality of reflecting surfaces. When the tape is in a non-tensioned state, gravity rotates the arm to a downward position such that an incident light beam is reflected by a plurality of surfaces to the light detecting source, such that when that tape is in a tensioned condition, the tape rotates the arm to an upward position, causing the reflected light to be misaligned and not be incident on the detector. The appropriate logic circuit is connected to the light sensor such that the condition of a tape is sensed and the appropriate command for the tape drives motors is given.

REFERENCES:
patent: 3244954 (1966-04-01), Branco
patent: 3437279 (1969-04-01), Rouland et al.
patent: 3470382 (1969-09-01), Tobey
patent: 3547369 (1970-12-01), Potucek
patent: 3731890 (1973-05-01), Ruoff et al.
patent: 3779481 (1973-12-01), Wilson
patent: 3941332 (1976-03-01), Matula
patent: 4313551 (1982-02-01), Umehara

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