Measuring and testing – With fluid pressure – Dimension – shape – or size
Patent
1995-03-13
1997-07-22
Williams, Hezron E.
Measuring and testing
With fluid pressure
Dimension, shape, or size
73202, 73 173, G01M 302
Patent
active
056505612
ABSTRACT:
An improvement on locomotive bubble-type fuel level measuring systems tests or monitors the integrity of the bubble-type pneumatic system by observing the rate of bubble formation, in addition to gauging fuel level. A bubble-type fuel level detection system bubbles a volume of air through a bubble tube. As air exits from the bottom of the tube, bubbles form in the fuel. These bubbles cause small variations in back-pressure in the tube as each bubble grows in size and eventually breaks free from the opening in the tube. The frequency these variations is proportional to the airflow or bubble rate at the bottom of the bubble tube such that pneumatic leaks or other problems can be detected by declaring a problem condition if the bubble rate falls below a predetermined threshold.
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Politzer Jay L.
Pulse Electronics, Inc.
Williams Hezron E.
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