1866 Shaw improved power hammer patent

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1866 Shaw improved power hammer patent

History of sheetmetal working power hammers History of Yoders, Pettingel, Quickway and other sheetmetal working power hammers

05-23-2010, 03:42 PM

Michael Moore Michael Moore is offline

Join Date: Jun 2006

Location: San Francisco, CA

Posts: 129

1866 Shaw improved power hammer patent

Here's a copy of the 1866 patent on the Shaw power hammer. The same type of leaf spring mechanism is used on the Yoder/Pettingell.

cheers,
Michael

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