Geometrical instruments – Gauge – Screw thread
Patent
1988-01-11
1989-04-18
Martin, Jr., William D.
Geometrical instruments
Gauge
Screw thread
33DIG1, 33558, G01B 516
Patent
active
048214221
ABSTRACT:
An improved measuring device for determining both major and pitch diameters of screw threads, gears, splines and the like, wherein attractable magnetic members attached to a movable spindle and fixed anvil serve to attract and retain gauging wires in their proper positions. An adjustable screw and spring assembly biases the spindle toward the anvil with a predetermined and readily adjustable pressure.
REFERENCES:
patent: 1392313 (1921-10-01), Fallow
patent: 2561534 (1951-07-01), Parker et al.
patent: 2831260 (1958-04-01), Shaw
patent: 2906029 (1959-09-01), Croshier et al.
patent: 2939220 (1960-06-01), Croshier et al.
Finch George W.
Heald Randall M.
Martin, Jr. William D.
McDonnell Douglas Corporation
Scholl John P.
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