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US Patent: 171,082
Chuck and Centerer
Patentee:
George F. Ballou - Boston, MA

USPTO Classifications:
279/8, 82/150

Tool Categories:
metalworking machines : metal lathes : metal lathe chucks

Assignees:
John E. Whitcomb - Waltham, Middlesex County, MA

Manufacturer:
American Watch Tool Co. - Waltham, Middlesex County, MA

Witnesses:
E. A. Marsh
M. Wilde

Patent Dates:
Applied: Sep. 29, 1875
Granted: Dec. 14, 1875

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Ballou & Whitcomb

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