Length measuring instrument

Details Length measuring instrument Length measuring instrument

1982-04-19

1983-05-03

Phillips, Charles E.

Geometrical instruments

Area integrators

Electrical

G01B 1102

Patent

active

043816096

ABSTRACT:
A measuring instrument having a flexible steel measuring scale mounted inside a flanged groove defined by a tubular housing includes a scanning unit, guided along the interior of the housing to scan the scale, and a magnet, mounted on the scanning unit. The magnet acts to pull the steel scale towards the scanning unit, into contact with the flanges of the groove. The spacing between the scanning unit and the flanges is precisely controlled and, therefore, the magnet provides precise control over the spacing between the scale and the scanning unit.

REFERENCES:
patent: 2886717 (1959-05-01), Williamson et al.
patent: 4149319 (1979-04-01), Nelle
patent: 4170826 (1979-10-01), Holstein
patent: 4170829 (1979-10-01), Nelle
patent: 4184262 (1980-01-01), Kolb et al.
patent: 4215480 (1980-08-01), Fisher et al.
patent: 4250381 (1981-02-01), Yoshiike et al.
patent: 4276696 (1981-07-01), Ernst

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