Hydraulic torque indicator
 A hydraulic torque indicator incorporating a gage readable in foot-pounds, which is adjustable for any length torque arm by the use of a link arm and an adjustable hydraulic cylinder connected in a trigonometric configuration which increases the pressure output to the torque gage as the torque arm to which the indicator is connected increases in length, thereby enabling the indicator to give an accurate indication of torque for any length torque arm. 
Joy Manufacturing Company
E B E B
E21B B25B E21B B25B
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Joseph H.
Byrne, Jr.