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GB Patent: GB-186,702,108
Improvement In Movable Spanners or Screw Wrenches
Patentees:
John Palmer, Sr. (exact or similar names) - Birmingham, England
Thomas Palmer (exact or similar names) - Birmingham, England
John Palmer, Jr. (exact or similar names) - Birmingham, England

USPTO Classifications:

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

Assignees:
None

Manufacturer:
Unknown

Witnesses:
none listed

Patent Dates:
Granted: Jul. 18, 1867

Patent Pictures: [ 1 | 2 | 3 ]
J. J. & T. Palmer patent July 18, 1867 - image edited from Abridgments of Specifications
Espacenet patent
Report data errors or omissions to steward Stan Schulz
2,108 (1867) in March 6, 1868 BUILDING NEWS
Description:
The patent presents several alternative arrangements for screw-adjustable jaw "Clyburn Spanners." Two versions are shown in the drawings selected for inclusion in "Abridgments of Specifications." A different version appears in an 1878 John Palmer & Sons advertisement in the 1878 Birmingham Directory. The patent is noted in Ron Geesin's THE ADJUSTABLE SPANNER.

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 #2,108 of the year 1867.

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