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US Patent: 422,879
Wrench For Oil Well Tools
Improvements In Automatic Wrench for Coupling and Uncoupling the Tools or Drill-Rods of Well-Boring Apparatus
William Forgie - Washington, PA

USPTO Classifications:
254/109, 81/52, 81/57.34

Tool Categories:


William Forgie - Washington, PA

H. J. Bernhard
Percy C. Bowen
C. C. Lee
M. E. Harrison

Patent Dates:
Applied: Jan. 28, 1888
Granted: Mar. 04, 1890

Patent Pictures:
William Forgie patent March 4, 1890
USPTO pdf tiff
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Forgie vs. Oil Well Supply ( introduction )
The specifications describe how drill wrenches were manipulated in the oil fields of the time.

The focus of this patent is the ratchet action carriage and the rack it works on. The action of that mechanism is similar to that employed in "railroad jacks."

The patent eventually was found invalid because Forgie had gotten all the details from Josiah Barrett. The jack action was Barrett's and used in Barrett jacks produced by Duff Mfg. (see Patent Gazette June 19, 1894 pg. 1573-1576).

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