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US Patent: 393,618
Machine For Forming Screw Blanks For Wrenches
Loring Coes - Worcester, MA

USPTO Classifications:

Tool Categories:
tool making : making wrenches

Coes Wrench Co. - Worcester, MA

Not known to have been produced

Ella P. Blenus
Chas. H. Burleigh
S. R. Barton

Patent Dates:
Applied: Aug. 31, 1888
Granted: Nov. 27, 1888

Patent Pictures:
Loring Coes patent November 27, 1888
USPTO pdf tiff
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Machine with forging dies to form the blanks for the adjusting screws for Coes "monkey wrenches." The machine includes a rotating set of top dies to upset the end of a rod segment and form the concentric base pin and enlarged section which is finished to form the "rosette."

The foot treadle forces the completed forging from the bottom die.

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