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US Patent: 1,732,549
Wrench For Tool Holders
Patentee:
Lennox F. Armstrong (exact or similar names) - Chicago, IL

USPTO Classifications:
81/124.3

Tool Categories:
wrenches : auxiliary wrenches

Assignees:
Armstrong Bros. Tool Co. - Chicago, IL

Manufacturer:
Not known to have been produced

Witnesses:
none listed
Patent Dates:
Applied: Feb. 17, 1928
Granted: Oct. 22, 1929

Patent Pictures:
Lennox F. Armstrong patent October 22. 1929
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Description:
The undercut edge of the socket in this wrench is to avoid breaking the edge of cutters in a tool holder like the one described in pat. no. 535,440.

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