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578,313
having the claw or shoulder ht, and the other of said shanks terminating in an outwardly- bent jaw portion the inner face of which is formed with a series of steps or offsets whose 5 longitudinal walls are arranged to be succes- sively brought into substantially parallel re- lation to the face of the opposite jaw portion adjacent to the claw as the two jaw portions are closed, and whose transverse walls come
into similar relation to the inner face of the io claw or shoulder h substantially as specified. In testimony whereof I affix my signature in presence of two witnesses. JOHN F. TINER. Witnesses : C. B. BROWN, GRATZ BROWN.