Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 142,070
Dies For Forming Hammers
Improvement in the Manufacture of Hammers
Jonathan Yerkes - Philadelphia, PA

USPTO Classifications:

Tool Categories:
woodworking tools : hammers
woodworking machines : specialty machines : tool making machines

Yerkes & Plumb - Philadelphia, PA

Not known to have been produced

John A. Wiedersheim
Millard F. Walton
Robert H. Horn

Patent Dates:
Applied: Jul. 18, 1873
Granted: Aug. 19, 1873

Patent Pictures:
Jonathan Yerkes Pat. Aug. 19, 1873
USPTO pdf tiff
Google Patents
Report data errors or omissions
The eye is punched first, and filled with a temporary plug, then the work piece is rotated during multiple strikes of the dies shown, thereby forming the ball-pein hammer head.

See the DATAMP entry for pat. no 150,385 for more on the Yerkes & Plumb partnership.

Copyright © 2002-2019 - DATAMP