Geometrical instruments – Area integrators – Electrical
Patent
1974-05-30
1976-03-09
Aegerter, Richard E.
Geometrical instruments
Area integrators
Electrical
331795D, G01B 520, G01B 728
Patent
active
039422542
ABSTRACT:
A gear checking machine including a rotary support table and an encoder coupled to the table to give a predetermined number of pulses per revolution of the table is disclosed. A probe, which successively contacts each gear tooth controls the output of a linear variable differential transformer the output of which is supplied to a recorder. When the machine is started, the probe is withdrawn after making contact with the gear and is brought forward to contact each succeeding gear tooth under the control of electronic circuitry which receives the encoder pulses. When a tooth counter reaches a count which indicates that one complete revolution of the gear has occurred, the machine checking cycle is shut off. The probe is driven by a drive eccentric which in turn is driven by a motor coupled to a clutch and a brake that are controlled by the electronic circuitry.
REFERENCES:
patent: 2761560 (1956-09-01), Pomernacki
patent: 3069779 (1962-12-01), Bauer et al.
patent: 3281665 (1966-10-01), Foster et al.
patent: 3397459 (1968-08-01), Ehrhardt
patent: 3522524 (1970-08-01), Smith et al.
patent: 3800423 (1974-04-01), Munro et al.
patent: 3849891 (1974-11-01), Pratt et al.
patent: 3849892 (1974-11-01), Fabish et al.
Simpson David Lee
Thompson Richard Telman
Aegerter Richard E.
Beart Robert W.
Bowen Glenn W.
Illinois Tool Works Inc.
Phillips Charles E.
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