Apparatus for measuring a figure having a calibration mode and m

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364563, 36457101, 36457102, 178 18, 178 19, G01B 7008

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active

057485020

ABSTRACT:
An apparatus for measuring a dimension or aspect of a figure, such as a linear planimeter or a polar planimeter, for measuring a size and shape of a figure and having a calibration mode. The apparatus includes a carriage supported on a pair of rollers for movement along an axis. One end of a measuring lever is pivotally mounted to the carriage. A tracing member having a magnifying lens for tracing a figure is provided on the other of the measuring lever. A computer having a calibrating mode changing switch and a correction value recording switch are provided on the carriage. To calibrate the apparatus, the apparatus is switched into the calibrating mode by the calibrating mode changing switch and correction values are calculated based on a reference figure. Each correction value is stored in a nonvolatile memory of the computer.

REFERENCES:
patent: 4616419 (1986-10-01), Kubo
patent: 4617740 (1986-10-01), Mikio
patent: 4819195 (1989-04-01), Bell et al.
patent: 4982504 (1991-01-01), Soderberg et al.
patent: 4999555 (1991-03-01), Yamazaki et al.
patent: 5115569 (1992-05-01), Kubo
patent: 5471226 (1995-11-01), Suzuki et al.

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