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US Patent: 672,552
Shaft-upsetting hammer
Patentee:
John P. Harrington - Philadelphia, PA

USPTO Classifications:
74/412

Tool Categories:
metalworking machines : drop hammers
metalworking machines : forging machinery

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
E. S. Rockafellar
John S. Rilling

Patent Dates:
Applied: Dec. 21, 1900
Granted: Apr. 23, 1901

Patent Pictures:
USPTO pdf tiff
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