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GB Patent: GB-187,202,834
Improvements in the Construction of Spanners and Screw Keys
Edward Gatty - Paris, France

USPTO Classifications:

Tool Categories:
wrenches : wrench adjustment types : angle adjustable wrenches


Not known to have been produced

none listed

Patent Dates:
Granted: Sep. 25, 1872

Patent Pictures: [ 1 | 2 ]
Edward Gatty patent Sept. 25, 1872 - image edited from Abridgments of Specifications
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The patent presents means to adjust the size of a wrench opening through the use of clip-on shims. The wrench could include a ratchet type angle adjustment.

Henry Bernoulli Barlow was a British patent agent.

Note: Early English 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 #2,834 of the year 1872.

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