Measuring and testing – Liquid level or depth gauge
Reexamination Certificate
2006-08-16
2010-11-16
Fitzgerald, John (Department: 2856)
Measuring and testing
Liquid level or depth gauge
Reexamination Certificate
active
07832268
ABSTRACT:
The level sensor arrangement comprises a paddle directly driven by a stepping or stepper motor to rotate in use unless the paddle is arrested in use by a material level, the arrangement including a sensor to determine paddle rotation and the sensor providing a signal to a controller indicative of paddle rotation.
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Connor, K. A., “Lecture 8, Stepper Motors”. May 9, 2002. http://hibp.ecse.rpi.edu/˜connor/education/IEE/lectures/Lecture—8—Stepper—motors.pdf.
Fitzgerald John
McManus Kajane
Synatel Instrumentation Limited
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