Geometrical instruments – Area integrators – Electrical
Patent
1979-06-08
1980-12-16
Little, Willis
Geometrical instruments
Area integrators
Electrical
33143M, 33147N, 33169B, G01B 702, G01B 726
Patent
active
042388856
ABSTRACT:
An instrument for the measurement and verification of linear dimensions includes a body equipped with external and internal feelers, a perch mounted in a slideway in the body and equipped with external and internal feelers cooperating with those of the body, and independent depth gauge mounted in a second slideway of the body, and a feeler rod mounted in a third slideway of the body, and cooperating with a contact piece fastened with an inner face of the external feeler of the perch. A movable member of a measurement transducer is selectively connected to the perch, to the gauge and to the feeler rod by a selective coupling device. In turn, a display device with zeroing control is connected to the measurement transducer. In a single apparatus, the subject instrument is capable of measuring and verifying different linear dimensions, such as for instance, the diameter of a shaft, the depth of a blind hole, the length of a shaft or groove, or any reduction of a diameter of a finished part or a part in the course of manufacturing.
REFERENCES:
patent: 4008523 (1977-02-01), von Voros
patent: 4063362 (1977-12-01), Amsbury et al.
patent: 4077129 (1978-03-01), Nishikata
Lendi Georges
Voinescu Nicolae
Casella Anthony J.
Little Willis
Tesa S.A.
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