Geometrical instruments – Area integrators – Electrical
Patent
1987-01-06
1988-08-23
Martin, Jr., William D.
Geometrical instruments
Area integrators
Electrical
33125A, G06M 314, G01B 312
Patent
active
047650630
ABSTRACT:
A nylon or metal filament carrying uniformly spaced light-distinguishable scale markings is moved, in taking a measurement, between a light source and a photosensor which reads the scale markings directly and emits a single electrical pulse for each passing scale marking. The extent of movement of the filament corresponds to the magnitude of the physical measurement being taken. Pulses from the photosensor are received by a memory-chip-containing electronic processing counter or calculator for counting, storage calculation, conversion to appropriate measurement units, etc. and a final reading of the measurement taken appears on a digital display. For length measurements, the apparatus is provided with a storage reel for the filament and a reversing switch for rewinding or for reversing the counting element. A timing device, a spring-operated weighing scale, and a fluid-pressure-responsive member attached to the filament may be included in the apparatus to adapt it for measurements of weight, time, velocity, pressure, altitude and the like to be taken.
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Altman Nathaniel
Martin, Jr. William D.
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