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US Patent: 267,166
Rapidly-Adjustable Nut for Calipers
Patentee:
Samuel P. Dover - Dayton, OH

USPTO Classifications:
33/558.08

Tool Categories:
layout tools : calipers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
William Krecnzsch
G. Bergmann
Robert Everett
J. A. Rutherford

Patent Dates:
Applied: Mar. 07, 1882
Granted: Nov. 07, 1882

Patent Pictures: [ 1 | 2 ]
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Description:
This design uses a pair of threaded "wings" as part of the nut, allowingthem to be disengaged easily to allow the screw to slide on the threaded shaft.

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