Geometrical instruments – Area integrators – Electrical
Patent
1976-02-09
1978-01-31
Aegerter, Richard E.
Geometrical instruments
Area integrators
Electrical
356169, G01B 1104
Patent
active
040707598
ABSTRACT:
A photoelectric incremental longitudinal measuring instrument is disclosed in which a measuring graduation and a displaceable photoelectric sensor housing unit are enclosed in an elongated hollow body resistant to bending to screen the measuring graduation and the sensor unit from environmental influences. The hollow body is fastened to one of the two objects to be measured with the instrument by fastening means having an articulated design, preferably, a pair of legs formed at an angle to one another having a weak place in the form of a groove in the apex area of the legs. Such an articulated design virtually eliminates the presence of compulsive forces between the hollow body and the object to which it is attached via the fastening means.
REFERENCES:
patent: 2459692 (1949-01-01), Fletcher
patent: 2875805 (1959-03-01), Flora
patent: 3352466 (1967-10-01), McAllister
patent: 3464569 (1969-09-01), Danning
patent: 3536287 (1970-10-01), Kramer
patent: 3815125 (1974-06-01), May et al.
patent: 3816002 (1974-06-01), Wieg
patent: 3816003 (1974-06-01), Litke
patent: 3952980 (1976-04-01), Pragenan et al.
Aegerter Richard E.
Dr. Johannes Heidenhain GmbH
Shepperd John W.
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