Electronic torque wrench and overshoot compensation circuit ther

Details Electronic torque wrench and overshoot compensation circuit ther Electronic torque wrench and overshoot compensation circuit ther

1991-03-04

1992-07-14

Crosland, Donnie L.

Communications: electrical

Condition responsive indicating system

Specific condition

81479, 340407, 364508, G08B 2100, B25B 23144

Patent

active

051307006

ABSTRACT:
A torque wrench has a battery-powered sensing circuit which produces a torque signal proportional to the level of the torque applied. A reference signal corresponding to a predetermined torque level is subtracted from the torque signal to produce a difference signal which is, in turn, compared with a compensation signal which is proportional to the rate of change of the torque signal and is produced by differentiating the torque signal. When the value of the difference signal exceeds the value of the compensation signal, an indicator is triggered to produce a tactile indication, the indication being produced prior to the time that the torque signal reaches the reference level by a predetermined time period.

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