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US Patent: 627,299
Metal-working machine
Patentee:
Frank G. Echols (exact or similar names) - Hartford, CT

USPTO Classifications:
192/93R, 409/68, 409/70, 82/143, 82/19

Tool Categories:
metalworking machines : milling machines

Assignees:
Pratt & Whitney Co. - Hartford, CT

Manufacturer:
Not known to have been produced

Witnesses:
Francis H. Richards
George A. Hoffman

Patent Dates:
Applied: Jun. 13, 1898
Granted: Jun. 20, 1899

Patent Pictures:
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Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Pratt & Whitney Co.
Description:
The machine in this patent was designed to manufacture the tap of patent 588,056 and constitutes a different approach from his earlier tap-making machine of patent 602,062.

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