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GB Patent: GB-187,602,550
Spanners and Wrenches
Edward H. Knight - Philadelphia, PA
William Robert Lake - London, England

USPTO Classifications:

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


Not known to have been produced

none listed

Patent Dates:
Granted: Jun. 20, 1876

Patent Pictures:
E. H. Knight patent June 20, 1876 - edited from Abridgments of Specifications
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When the auxiliary lever handle is released, the "fixed" jaw is free to move against the pressure of a compression spring in the handle. This construction would allow for "ratchet" action. "William Robert Lake .. Southampton-buildings, London" was a British patent agent.

See the DATAMP entry for U.S. patent 178,162 for drawings.

Note: Early British patents (pre 1916) were numbered by the year and started at patent #1 at the start of each year in January. The patent # used in DATAMP represents the year of registration and the patent # (with "leading zeros" interposed to make the number total nine digits). This patent is #2,550 of the year 1876.

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