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

1984-04-24

Haroian, Harry N.

Geometrical instruments

Area integrators

Electrical

33147K, 33148H, G01B 512

Patent

active

044439474

ABSTRACT:
A plug comparator for checking the diameter of holes of mechanical parts comprising a support, a movable measurement unit and a protection casing.
The movable measurement unit comprises two movable arms bearing respective feeler elements which come into contact with the part to be checked.
A position transducer detects the position of the movable arms and is connected by an electric cord to an electric supply and indication group.
The casing has a lower base with a frustoconical seat for the fitted housing of a closure plate. The closure plate has a cut in diametral direction which subdivides it into two adjacent portions connected by a third portion which is elastically yieldable so as to permit fitting the closure plate in the frustoconical seat.

REFERENCES:
patent: 1285755 (1918-11-01), McCuen
patent: 2019287 (1935-10-01), Bates
patent: 2064028 (1936-12-01), Moyer
patent: 2403546 (1946-07-01), Olsen
patent: 2638681 (1953-05-01), Kinley et al.
patent: 2790462 (1957-04-01), Ashton
patent: 3336555 (1967-08-01), Pastan
patent: 3808696 (1974-05-01), Possati
patent: 3943632 (1976-03-01), Albertazzi
patent: 4030202 (1977-06-01), Fadl
patent: 4077130 (1978-03-01), Possati
patent: 4175402 (1979-11-01), Hile
patent: 4279079 (1981-07-01), Gamberini et al.
patent: 4290204 (1981-09-01), Possati
patent: 4306455 (1981-12-01), Selleri

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