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US Patent: 203,774
Wrench Attachment
Henry Franklin Read - Brooklyn, NY

USPTO Classifications:
30/102, 81/182, 81/184, 81/97

Tool Categories:
wrenches : wrench components : pipe jaw attachments for wrenches


H. F. Read & Co. - New York, NY

A. E. H. Johnson
J. W. Hamilton Johnson

Patent Dates:
Applied: Feb. 16, 1878
Granted: May 14, 1878

Patent Pictures:
Henry F. Read Pat. May 14, 1878
USPTO pdf tiff
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The attachment is a pair of detachable jaw components designed to temporarily convert a nut wrench to a pipe wrench or pipe cutter. The wrench shown in the illustration is Read's May 13, 1873 patent (no. 138,932). In the specifications, Read discusses modifying the adjusting knurl of a nut wrench to accept a "claw wrench" to provide extra force to make such a jaw grip or cut pipe. The illustration for Read's May 24, 1881 patent (no. 241,881) shows this adaptation.

A Nov. 15, 1879 AMERICAN MACHINIST article describes the wrench with pipe gripping and pipe cutter attachments in terms that imply Read was producing them.

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