Apparatus for counting turns when making threaded joints including an increased resolution turns counter
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United States of America Patent
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May 8, 1984
Grant Date -
N/A
app pub date -
Apr 10, 1981
filing date -
Apr 10, 1981
priority date (Note) -
Expired
status (Latency Note)
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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.
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