Length measurement device

Details Length measurement device Length measurement device

1993-04-08

1994-12-27

Fulton, Christopher W.

Geometrical instruments

Distance measuring

Error compensation

33704, G01B 1104

Patent

active

053753380

ABSTRACT:
A length measurement device for measuring the relative position of two objects is disclosed wherein a graduation on a scale carrier is scanned by a scanning unit for obtaining measured position values. The scale carrier is connected to a first fixed reference point within the measuring length in a rigid manner, and is connected with a carrier member so as to be longitudinally displaceable, for compensating for measurement errors which are caused by temperature variation. The carrier member is rigidly connected with a first object at a second fixed reference point within the measuring length and is connected so as to be longitudinally displaceable with the first object 1. The first fixed point and/or the second fixed point are changeable or movable within the measuring length.

REFERENCES:
patent: 3816002 (1974-06-01), Wieg
patent: 4320578 (1982-03-01), Ernst
patent: 4503157 (1985-07-01), Nelle
patent: 4593471 (1986-06-01), Nelle
patent: 4776098 (1988-10-01), Nelle
patent: 4912856 (1990-04-01), Ernst
patent: 5050311 (1991-09-01), Nelle
patent: 5182867 (1993-02-01), Nelle

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