Compact column gage

Details Compact column gage Compact column gage

1978-08-22

1980-04-15

Stearns, Richard R.

Geometrical instruments

Area integrators

Electrical

33147N, 33172E, 235 92EA, 340754, G01B 702

Patent

active

041976509

ABSTRACT:
A part sizing system in which the upper and lower tolerance limits are illuminated on the same bar graph display. Electrical representations of the upper and lower tolerance limits are alternately coupled to the bar graph display so as to superimpose visual indications of both limits on one another, with each limit being distinguishable from each other by different light intensities. In one embodiment this bar graph display is disposed adjacent another bar graph display in the same housing. The other bar graph display is utilized to provide a visual indication of the output of at least one variable reluctance transducer which measures the size of the part under test. Improved transducer excitation circuitry is also provided for insuring accurate measurements.

REFERENCES:
patent: 3557462 (1971-01-01), Kiewicz et al.
patent: 3754121 (1973-08-01), Delay et al.
patent: 3805036 (1974-04-01), Michaud et al.
patent: 3824581 (1974-07-01), Ohno
patent: 3892043 (1975-07-01), Bonikowski
patent: 3895875 (1975-07-01), Kitaura et al.
patent: 3906345 (1975-09-01), Bentolasi
patent: 4014011 (1977-03-01), Ashkin
patent: 4038756 (1977-08-01), Smith et al.
Burroughs, "100 Element Dual Linear Bar Graph Display", Mar. 1976, Bulletin No. 5005D.
BG12203-2, "Dual Bar Graph Displays".

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