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jaws being rounded for engagement with the. inner wall of the hub, transversely-corru- gated operating-handles for said jaws, and a ring disposed upon the handle for engage- 5 ment with the corrugations to hold said jaws in an adj ousted position, substantially as speci- fied.
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In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses. SAMUEL ALFRED HAINES. Witnesses: 0. H. CHAPMAN, B. F. JAMES.