Geometrical instruments – Area integrators – Electrical
Patent
1984-06-01
1986-02-11
Haroian, Harry N.
Geometrical instruments
Area integrators
Electrical
33125C, G01B 1104
Patent
active
045691371
ABSTRACT:
This disclosure depicts a linear scale type displacement measuring device wherein the measuring device comprises a frame member connected to one of two bodies to be measured, a main scale held on the frame member and an index scale connected to the other of the two bodies, and a relative displacement between the two bodies is measured from a relative movement between the main scale and the index scale. A main scale holding member having two guide surfaces corresponding to two surfaces intersecting each other of the main scale is bondedly fixed at a predetermined pitch to the frame member in its longitudinal direction, and the main scale is bondedly fixed to the main scale holding member in a state of being urged against the guide surfaces of the main scale holding member by urging means utilizing a main scale engaging portion separately provided or formed on the main scale holding member itself. With this arrangement, irrespective of a bend and the like of the frame member, the main scale is held straightly and a difference in value of thermal expansion between the main scale and the frame member can be absorbed.
REFERENCES:
patent: 4136958 (1979-01-01), Nelle
patent: 4414746 (1983-11-01), Takizawa
Haroian Harry N.
Mitutoyo Mfg. Co. Ltd.
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