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US Patent: 302,520
Trip Hammer
Patentee:
Isaac L. Penney - Minneapolis, Hennepin County, MN

USPTO Classifications:
72/433, 72/446

Tool Categories:
metalworking machines : forging machines : drop hammers

Assignees:
None

Manufacturer:
O. L. Packard Machinery Co. - Milwaukee, Milwaukee County, WI

Witnesses:
E. M. Runyan
L. Walker
Alex Scott
Jason W. Grahour

Patent Dates:
Applied: Aug. 24, 1883
Granted: Jul. 22, 1884

Patent Pictures: [ 1 | 2 ]
USPTO pdf tiff
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"Vintage Machinery" entry for Packard Machinery Co.

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