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US Patent: 455,238
Wrench
Patentee:
Campbell A. McIntosh (exact or similar names) - Vancouver, BC Canada

USPTO Classifications:
81/133, 81/63

Tool Categories:
wrenches : ratchet wrenches
wrenches : wrench adjustment types : screw adjust wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Chas. Nida
C. Sedgwick
Ivan Bushong
Chas. M. Bolton

Patent Dates:
Applied: Nov. 18, 1890
Granted: Jun. 30, 1891

Patent Pictures:
Campbell A. McIntosh patent June 30, 1891
USPTO (New site tip)
Google Patents
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Description:
An adjustable jaw reversible ratchet. The adjusting worm drives a hollow gear which engages two parallel racks with jaws set at an oblique angle.

It would be interesting to see a prototype and find out what the range of adjustment for the jaws turns out to be. The parallel Canadian patent is no. CA-40,796 issued October 24, 1892.

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