Linear measuring system

Details Linear measuring system Linear measuring system

1985-07-11

1986-04-29

Stearns, Richard R.

Geometrical instruments

Area integrators

Electrical

33125T, 250237G, G01B 1104

Patent

active

045847738

ABSTRACT:
A linear measuring system comprises an elongate housing tube, which contains a metal strip, which is provided with a scale. The housing tube contains also a scanning unit, which is movable along the scanning tube to scan said scale. To ensure that the metal strip will be uniformly tensioned throughout its length and that the accuracy of the scanning operation will not be affected by a deviation of the longitudinal direction of the housing tube from a desired direction in which the measurement is to be taken or by changes of the length of the housing tube, the metal strip extends in the housing tube substantially without a longitudinal restraint and extends at both ends out of the housing tube and is held at said two ends by brackets, which are disconnected from the housing tube. In the housing tube, the side edges of the metal strip are entirely clear of the housing tube. The scanning unit is provided with guiding means, which are in sliding contact with both side edges of the metal strip and prevent a lateral wandering of the metal strip relative to the scanning unit.

REFERENCES:
patent: 3816002 (1974-06-01), Wieg
patent: 4060903 (1977-12-01), Ernst
patent: 4170826 (1979-10-01), Holstein
patent: 4320578 (1982-03-01), Ernst
patent: 4534113 (1985-08-01), Holstein
patent: 4541181 (1985-09-01), Giacomello

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