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US Patent: 390,190
Turret-lock
Patentee:
Francis H. Richards - Hartford, CT

USPTO Classifications:
188/69, 29/45, 74/813L

Tool Categories:
metalworking machines : metal lathes : turret lathes

Assignees:
Francis H. Richards - Hartford, CT
Pratt & Whitney Co. - Hartford, CT

Manufacturer:
Pratt & Whitney Co. - Hartford, CT

Witnesses:
Wilbur M. Stone
W. M. Ryorkman

Patent Dates:
Applied: Jun. 20, 1888
Granted: Sep. 25, 1888

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Pratt & Whitney Co.

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