Geometrical instruments – Gauge – Straightness – flatness – or alignment
Patent
1987-03-16
1988-09-20
Martin, Jr., William D.
Geometrical instruments
Gauge
Straightness, flatness, or alignment
33504, 33 1BB, 73146, G01B 728
Patent
active
047715499
ABSTRACT:
Deviations in flatness on a horizontal surface are measured by running over the surface, at a constant driven speed, an instrument sensitive to slope and which generates a continuous voltage signal corresponding to a continuous slope measurement. The continuous voltage signal is filtered to remove extraneous high frequency voltage signals thereby to produce raw continuous analog slope data which is digitized and calibrated to provide calibrated digital slope data from which other flatness data is computed. Procedures are described for calibrating the instrument and for eliminating or compensating for distortions in the measurements.
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Gasparini Dario A.
Huckelbridge, Jr. Arthur A.
Marine Stephen
Rogers Barry A.
Shelangoskie Donald R.
Martin, Jr. William D.
The Austin Company
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