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US Patent: 339,336
Chuck
Patentee: Charles W. Shartle (exact or similar names) - Middletown, OH USPTO Classifications: 279/123, 81/97, 82/167 Tool Categories: metalworking machines : metal lathes : lathe dogs Assignees: None Manufacturer: Middletown Machine Co. - Middletown, OH Witnesses: A. P. Grant John A. Wiedersheim	Patent Dates: Applied: Jan. 23, 1886 Granted: Apr. 06, 1886 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Middletown Machine Co.
Description: This lathe "chuck" has work-holding jaws that pivot to bite into the work under cutting force.

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