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US Patent: 1,185,060
Spring Counterbalance for the Rams of Boring Mills
Patentee:
Frederick F. Clarke - Franklin, Venango County, PA

USPTO Classifications:
408/135, 408/235

Tool Categories:
metalworking machines : metalworking machine mechanisms
metalworking machines : drilling and boring : vertical boring mills

Assignees:
Colburn Machine Tool Co. - Franklin, Venango County, PA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Feb. 10, 1914
Granted: May 30, 1916

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Colburn Machine Tool Co.

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