Transducer for measuring workpieces

Details Transducer for measuring workpieces Transducer for measuring workpieces

1979-09-14

1981-09-29

Haroian, Harry N.

Geometrical instruments

Area integrators

Electrical

G01B 712

Patent

active

042914663

ABSTRACT:
A caliper-type transducer for measuring a workpiece includes a pair of non-crossing pivot arms each having a contact end and a transducer end. The arms are interconnected for frictionless pivotal movement by a fixed pivot block and spring members which act to limit the displacement of the arms to complemental displacement in the plane of measurement. One arm carries two reactive elements mounted in spaced opposed relationship such that the transducer end of the other arm may be disposed therebetween to vary the reactances according to movement of the caliper ends which cause corresponding movement in their respective transducer ends. The change in reactances of the reactive elements are differentially sensed as the arms are displaced from an initial position when measuring the workpiece.

REFERENCES:
patent: 2240184 (1941-04-01), Hathaway
patent: 2281453 (1942-04-01), Petersen
patent: 2309891 (1943-02-01), Fisk
patent: 2732625 (1956-01-01), Buisson
patent: 3000101 (1961-09-01), Giardino et al.
patent: 3416373 (1968-12-01), Havens
patent: 3922792 (1975-12-01), Ito
patent: 3943632 (1976-03-01), Albertazzi
patent: 3958337 (1976-05-01), Anichini
patent: 3962792 (1976-06-01), Stepanek
Marposs Catalog, "Electronic Gauging Systems".
Marposs Catalog "In-Process Electronic Gauging Systems", Marposs Gauges Corp., Madison Heights, Mich.

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