Tension controlling

Details Tension controlling Tension controlling

1978-01-19

1980-07-22

Smith, Jr., David

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318532, 318 6, H02P 314

Patent

active

042141907

ABSTRACT:
Shunt motor field control for setting motor torque (and thereby controlling tension on a reeler or the like driven by the motor) comprising thyristor control gated by a comparator with a ramp-form voltage input compared to a reference level established by an operator setting of a potentiometer. The ramp-form voltage is generated by charging and discharging a capacitor and provides a spike voltage through the comparator when the reference level is exceeded. Means are provided to compensate potentiometer and capacitor tolerances to match potentiometers to the torque control setting range.

REFERENCES:
patent: 3095534 (1963-06-01), Cockrell
patent: 3221237 (1965-11-01), Kalenian
patent: 3470437 (1969-09-01), Douglass
patent: 3601673 (1971-08-01), Mason
patent: 3619752 (1971-11-01), Bateika

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