Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 51,967
Improvement in Compasses and Calipers
Patentees:
Frank P. Pfleghar (exact or similar names) - New Haven, CT
William Schollhorn (exact or similar names) - New Haven, CT

USPTO Classifications:
33/558.01

Tool Categories:
layout tools : calipers

Assignees:
None

Manufacturer:
Unknown

Witnesses:
John E. Earle
John H. Shumway
Rufus H. Sanford

Patent Dates:
Granted: Jan. 09, 1866

Patent Pictures: [ 1 | 2 ]
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Ralph Brendler
Description:
This design uses a tapered thumbscrew to lock the arm in place against a direct-reading scale.

Note that one of the witnesses here holds a previous caliper patent (John Earle: 19,058 - 1/05/1858).

Copyright © 2002-2024 - DATAMP