Measuring and testing – Dynamometers – Responsive to torque
Patent
1981-04-10
1984-05-08
Ruehl, Charles A.
Measuring and testing
Dynamometers
Responsive to torque
29240, 364506, 377 47, G01L 524
Patent
active
044467451
ABSTRACT:
An apparatus for controlling the number of turns made and the torque applied during the operation of making a threaded joint includes a high resolution turns counter. The turns counter senses the rotation of a member of the joint and generates a pulsed signal, each pulse representing a predetermined increment of rotation. The turns counter includes an idler wheel driven by one member of the joint and in turn driving an encoder which generates a relatively large number of pulses per revolution of the idler wheel. A presettable divide-by-N circuit is utilized to divide the encoder pulses to generate a pulse train to a monitoring and control apparatus for indicating whether a good or a bad joint has been made. The divide-by-N counter can be preset to generate a predetermined number of pulses per revolution of the joint member or pulses representing a predetermined percentage of a total number of turns to be made.
REFERENCES:
patent: 3739276 (1973-06-01), Dornberger
patent: 4074196 (1978-02-01), Webster
patent: 4091451 (1978-05-01), Weiner et al.
patent: 4176436 (1979-12-01), McCombs et al.
patent: 4194184 (1980-03-01), Hartmann et al.
Hall James D.
Stone Lyndon R.
Baker International Corporation
Ruehl Charles A.
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