Method and apparatus for measurement of straightness and flatnes

Details Method and apparatus for measurement of straightness and flatnes Method and apparatus for measurement of straightness and flatnes

1985-10-15

1988-01-12

Little, Willis

Geometrical instruments

Gauge

Straightness, flatness, or alignment

33538, 33521, 33366, G01B 524

Patent

active

047181737

ABSTRACT:
The present invention relates to a method and apparatus for high-precision straightness and flatness measurement of objects which are so large that available measuring rulers do not cover the distance to be measured. According to the invention, the measurements are carried out in stages through the use of a measuring ruler which rests on freely adjustable feet and which is used as a base for a measuring instrument with independent reference points relative to the actual surface or edge.

REFERENCES:
patent: 2788578 (1957-04-01), Digiacinto
patent: 3751818 (1973-08-01), Eller, Jr.
patent: 3835546 (1974-09-01), Jaquet
patent: 4434558 (1984-03-01), Face, Jr. et al.
patent: 4473960 (1984-10-01), Face, Jr. et al.

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