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US Patent: 8,153X
Wrench
Patentee:
Solyman Merrick - Springfield, MA

USPTO Classifications:

Tool Categories:
wrenches : wrench adjustment types : quick adjust wrenches
wrenches : nut wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Homer Foot
William Bliss

Patent Dates:
Granted: Apr. 18, 1834

Patent Pictures:
Solyman Merrick Pat. April 18, 1834. Illus. from Wrenches and Patents, compiled by Don Shockley.
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Description:
The patent is for Merrick's rack wrench improvements to the H. King rack wrench 7,254X. The drawing is copied from "Wrenches and Patents," compiled by Don Shockley.

The patent was recovered and added to the online patent database after the initial DATAMP entry had been made. A close reading of the specifications show that the rack teeth were to be cut on a sliding bar; said bar being moved by a supplemental adjusting nut adjacent to the handle ferule. This movement would be limited to a distance roughly equal to the spacing of the rack teeth. A wrench constructed according to this patent would combine screw and rack adjustment.

No firm history on production of this wrench has survived. Homer Foot and Stephen Bemis (later Bemis and Call) both produced other early Merrick Patent wrenches.

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