Plug comparator for checking the diameter of holes

Details Plug comparator for checking the diameter of holes Plug comparator for checking the diameter of holes

1981-05-29

1983-12-20

Martin, Jr., William D.

Geometrical instruments

Area integrators

Electrical

33178E, G01B 322

Patent

active

044208898

ABSTRACT:
A manual plug comparator for checking the diameter of holes of mechanical parts, comprising a support, a movable measurement unit and a protective casing. The movable measurement unit comprises two movable arms respectively bearing feeler elements which come into contact with the parts to be checked. A position transducer detects the position of the movable arms and is connected by an electric cord to an electric supply, detection and indication group. A base plate fastened to the casing has an opening adapted to permit the introduction of air under pressure into the plug. The flow of air passes through the inside of the plug, removing any foreign matter and emerges through other openings provided in the support.

REFERENCES:
patent: 2403546 (1946-07-01), Olsen
patent: 2638681 (1953-05-01), Kinley et al.
patent: 3336555 (1967-08-01), Pastan
patent: 3808696 (1974-05-01), Possati
patent: 4030202 (1977-06-01), Fadl et al.
patent: 4077130 (1978-03-01), Possati
patent: 4279079 (1981-07-01), Gamberini et al.
patent: 4290204 (1981-09-01), Possati
patent: 4306455 (1981-12-01), Selleri

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