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US Patent: 133,198
Improvement in Adjustable Jaws for Vises
Patentee:
Calvin L. Butler (exact or similar names) - Greenfield, MA

USPTO Classifications:
269/249, 269/262

Tool Categories:
work holding : vises

Assignees:
Calvin L. Butler - Greenfield, MA
Austin De Wolf - Greenfield, MA

Manufacturer:
Not known to have been produced

Witnesses:
Austin De Wolf
J. F. Bridges
Patent Dates:
Granted: Nov. 19, 1872

Patent Pictures:
Patent Fig. 1
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Carl Matthews
Description:
This is very similar to the modern day Wilton jaw insert on the Wilton No. 78A.

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