Geometrical instruments – Distance measuring – Single contact with a work engaging support
Patent
1990-11-28
1992-06-30
Haroian, Harry N.
Geometrical instruments
Distance measuring
Single contact with a work engaging support
335016, 33556, 33559, G01B 318
Patent
active
051251655
ABSTRACT:
A spindle for a linear distance measuring member is described herein. A linear gauge is provided with a hollow spindle having a flexible rod therein. The flexible rod is rigidly coupled at one end to the spindle, and at the other end thereof to the measuring member. Axial motion of the spindle is transferred directly to axial motion of the measuring member, because the axial movement of the rod exactly corresponds to axial movement of the spindle. If the spindle undergoes nonaxial movement, such as by tilting, the flexible rod within the spindle bends to accommodate for the change in length to the spindle. The use of a hollow spindle with a flexible rod therein effectively decouples nonaxial movement of a spindle from axial movement of a measuring member. A device made according to the principles taught herein may be used in any linear measuring system which transfers axial motion of one member to axial motion of a measuring member, to decouple laterial motion between the two for minimizing the errors.
REFERENCES:
patent: 4152837 (1979-05-01), Nelle et al.
patent: 4275505 (1981-06-01), Delmas
patent: 4495701 (1985-01-01), Nakadoi
patent: 4603480 (1986-08-01), Sakagami
Haroian Harry N.
Mitutoyo Corporation
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