US Patent: 521,771 - Milling-machine


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US Patent: 521,771

Milling-machine

Patentee:

Charles H. Trask (exact or similar names) - Lynn, MA

USPTO Classifications:

409/169

Tool Categories:

metalworking machines : milling machines

Assignees:

None

Manufacturer:

Trask Milling Machine Co. - Portland, ME

Witnesses:

F. F. Raymond, II

J. M. Dolan

Patent Dates:
Applied:	Mar. 03, 1890
Granted:	Jun. 19, 1894

Patent Pictures:

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Vintage Machinery entry for Trask Milling Machine Co.

Description:

This patent improves on the inventor's milling machine of patent 422,663, comprising "devices for automatically backing off a single blank forming a rotary tool or cutter."