US Patent: 2,430,458 - Automatic screw control


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US Patent: 2,430,458

Automatic screw control

Patentee:

Leo F. Farrell (exact or similar names) - South Haven, MI

USPTO Classifications:

269/182, 269/189, 269/249, 74/424.94

Tool Categories:

work holding : vises : bench vises

Assignees:

Titan Manufacturing Co. - Grand Rapids, MI

Manufacturer:

Wilton Tool Manufacturing Co. - Schiller Park, IL

Witnesses:

Unknown

Patent Dates:
Applied:	Aug. 27, 1945
Granted:	Nov. 11, 1947

Patent Pictures:

USPTO (New site tip)
Google Patents
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"Vintage Machinery" entry for Wilton Corp.

Description:

This patent number was seen on a Wilton 3½" Triple Duty Vise. The patent covers a quick-release mechanism where the threads engage when turned in one direction but release when turned in the other direction.