Flow-meter using a marker responsive to a magnetic field

The meter comprises a rotatable member 12 coupled to a shaft member 14. A measuring circuit 22 comprising an AC power supply and a primary coil is mounted on the shaft member. The rotatable member or hub 12 comprises a passive non-permanent magnet marker 18 which is responsive to a magnetic field. W...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	GARY MARTIN ODDIE
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT MEASURING MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL METERING BY VOLUME MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PHYSICS TESTING
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