US Patent: RE5,653 - Improvement in vises


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US Patent: RE5,653

Improvement in vises

Patentees:

Thomas W. Porter (exact or similar names) - Boston, MA

Henry K. Porter (exact or similar names) - Boston, MA

USPTO Classifications:

269/285, 74/548

Tool Categories:

work holding : vises : bench vises

Assignees:

Charles Parker - Meriden, CT

Manufacturer:

Charles Parker Co. - Meriden, CT

Witnesses:

Joseph H. Beckett

Charles L. Taylor

Patent Dates:
Applied:	Jun. 19, 1873
Granted:	Nov. 11, 1873

Reissue Information:
Reissue of 72,327 (Dec. 17, 1867)

Patent Pictures:

USPTO (New site tip)
Google Patents
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"Vintage Machinery" entry for Charles Parker Co.

Description:

The invention is a screw that prevents the handle from shifting in the screw-head, which was useful in preventing "blood-blisters" and in preventing accidental loosening of the vise, especially when the holding pressure had to be gentle.