Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 928
ripping apparatus isshown in its open position, andthe cable is therefore running in-operatively through it. When itis required to grip the cable it ismerely necessary to pull over thelever A, whereupon the lever, itsquadrant frame and shank attach-ments C, are raised up bodilyabout the fixed… … Derrick. 876 SCRAPS.
Mechanical drawing
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