G - Physics – 01 – L
Patent
G - Physics
01
L
73/70, 73/88
G01L 5/24 (2006.01) B25B 23/14 (2006.01) G01L 1/22 (2006.01)
Patent
CA 1115086
ABSTRACT OF THE DISCLOSURE Apparatus for measuring the amount of previously applied torque to a fastener. A transducer is utilized to sense the amount of a subsequently applied torque to the fastener and provides an output signal representative of the applied torque. The torque is applied until further motion or breakaway of the fastener is obtained. Typically, the signal from the transducer increases until breakaway of the fastener is obtained and then the signal decreases momentarily to a valley before it again increases with further applied torque. A positive peak detector senses the maximum positive output of the transducer before the signal begins to decrease. A negative peak detector senses the minimum negative output of the transducer before the signal again increases. The negative peak detector is energized by a switching network upon detection of a negatively sloped signal from the transducer. A display coupled to the output of the negative peak detector provides a visual indication of the valley torque which is closely associated with the amount of torque originally applied to the fastener.
347413
Gse Inc.
Smart & Biggar
LandOfFree
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