Geometrical instruments – Area integrators – Electrical
Patent
1983-08-11
1986-04-15
Haroian, Harry N.
Geometrical instruments
Area integrators
Electrical
33558, 33561, G01B 728
Patent
active
045818266
ABSTRACT:
A multicoordinate sensing head is disclosed in which a sensing pin is secured in the interior of a sensing head housing by means of a flange which is rigidly secured to the pin. The flange rests on precisely formed bearing balls which are distributed uniformly around the circumference of an opening in the bottom of the housing through which the pin passes. A rim on the flange extends around the bearing balls to grip the balls and prevent radial shifting of the sensing pin. In the rest position, into which the sensing pin is pressed by the action of the spring operating via a sensor probe, the free end of the sensing pin is precisely positioned in a predetermined orientation with respect to the housing in a repeatable and accurate manner. When the sensing pin is deflected, the flange tilts around one or two of the balls and thereby moves the sensor probe axially to allow a measurement system to sense deflection of the sensing pin.
REFERENCES:
patent: 4203225 (1980-05-01), Nilsson
patent: 4270275 (1981-06-01), McMurtry
patent: 4279080 (1981-07-01), Nakaya
patent: 4288925 (1981-09-01), McMurtry
patent: 4443946 (1984-04-01), McMurtry
Dr. Johannes Heidenhain GmbH
Haroian Harry N.
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