Position transducer for machine tools and measuring machines

Details Position transducer for machine tools and measuring machines Position transducer for machine tools and measuring machines

1977-03-29

1978-06-20

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356169, H01J 314

Patent

active

040963845

ABSTRACT:
A position transducer for machine tools and measuring machines, arranged to measure relative displacements of a first part of the machine with respect to a second part of the machine, is described. The main feature of this position transducer is to operate by means of the optical coupling of at least two photoelectric readers fixed on the first part and at least two optical photoengraved rules rigidly connected to the second part. Selector means are provided to present in output the signals from one of the photoelectric readers.

REFERENCES:
patent: 3451054 (1969-06-01), Johnson
patent: 3544800 (1970-12-01), Elliott
patent: 3867038 (1975-02-01), Westell

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