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US Patent: 88,230
Improvement in Wrench
Patentee:
George C. Taft - Worcester, MA

USPTO Classifications:
81/171

Tool Categories:
wrenches : nut wrenches

Assignees:
Loring Coes - Worcester, MA

Manufacturer:
L. Coes & Co. - Worcester, MA
Coes Wrench Co. - Worcester, MA

Witnesses:
Thomas H. Dodge
D. L. Miller

Patent Dates:
Granted: Mar. 23, 1869

Reissue Information:
Reissued as RE4,902 (May 14, 1872)

Patent Pictures:
George C. Taft patent March 23, 1869
USPTO pdf tiff
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Description:
The patent addresses the shape of the head and shank of a monkey wrench in relation to strength and durability. The reverse jog bar noted in the patent is a prominent feature of Coes wrenches dating to the 3rd quarter of the 19th Century. The pin fastening the ferrule to the wrench bar was one means to overcome a weakness of the original Coes patent where the ferrule was not firmly attached to the wrench bar.

This patent was featured in early 1870s L. Coes & Co. wrench advertisements.

Aspects of this patent were incorporated into a broader 1870 English patent (GB-187000904) which also has features from other Taft wrench patents.

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