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US Patent: 134,296
Grinding Machines
George W. Libbey - Philadelphia, PA

USPTO Classifications:
451/213, 451/237, 451/410

Tool Categories:
metalworking machines : grinding machines


Not known to have been produced

William A. Steel
John K. Rupertus
John Parker
Thomas McIlvain

Patent Dates:
Granted: Dec. 24, 1872

Patent Pictures:
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My invention relates to that class of grinding-machines in which, a revolving grindstone or other grinding-disk is employed and my invention consists in combining with the reciprocating rest of the machine a flexible guide-bar, by the adjustment of which a straight or curved cutting-edge may be imparted to a plane-iron, chisel, or other cutting instrument. My invention also consists of a reciprocating rest, constructed in the peculiar manner fully described hereafter, for presenting the tool to the grinding-disk.

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