Instrument for measuring lengths

Details Instrument for measuring lengths Instrument for measuring lengths

1985-06-28

1986-12-30

Little, Willis

Geometrical instruments

Area integrators

Electrical

33125A, G01B 1102

Patent

active

046318305

ABSTRACT:
A sealed instrument for measuring lengths comprises a carrier, a scale mounted on said carrier, and an optoelectronic scanning unit including a scanning plate, light emitters and light receivers. The scanning unit is adjustable along the scale by means of a feeler, which includes an actuating member. A correcting device is provided, which includes a deformable correcting template and a template follower for scanning the correcting template and for adjusting the scanning plate relative to the actuating member in the direction of the scanning movement. In order to reduce the overall expenditure, to simplify the correction and to increase the reliability of operation and the accuracy of the measurement, only the scanning plate is operatively connected by an adjusting mechanism to the template follower and is adjustable relative to the remaining parts of the scanning unit in dependence on the configuration of the correcting template.

REFERENCES:
patent: 4170829 (1979-10-01), Nelle
patent: 4262423 (1981-04-01), Affa
patent: 4400880 (1983-08-01), Nelle
patent: 4430799 (1984-02-01), Affa
patent: 4475289 (1984-10-01), Nelle
patent: 4492032 (1985-01-01), Nelle
patent: 4512082 (1985-04-01), Burkhardt

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