Magnetic flowmeter
AssigneeFischer & Porter Co.
InventorsEggert Appel, Gottfried Geisler, Wilfried Kiene
Life of this patent
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Abstract
A magnetic flowmeter which includes a spool formed by a metallizable ceramic through which the fluid to be metered is conducted. The outer surface of the spool is metallized in its central region to define a pair of metering electrodes at diametrically-opposed positions, an electromagnetic field being established within the spool whereby when the flowing fluid intercepts this field, an emf is induced therein to produce a signal at the metering electrodes which is a function of flow rate. Overlying each metering electrode and projecting from the spool is a ceramic block whose outer surface is metallized to define a shield electrode which covers the metering electrode.
Claims8
A magnetic flowmeter comprising:
- A. a spool formed of a metallizable ceramic through which is flowable the fluid to be metered;
- B. a pair of metering electrodes metallized on the outer surface of the spool in the central region thereof at diametrically opposed positions on an electrode axis that is normal to the flow axis of the spool;
- C. a pair of electromagnetic coils on the exterior of the spool at diametrically opposed positions on a coil axis that is normal both to the electrode axis and the flow axis to produce an electromagnetic field in the spool which is intercepted by the fluid to induce an emf therein to produce a signal at the metering electrodes which is a function of flow rate;
- and
- D. a block of metallizable ceramic overlying each metering electrode and projecting from the spool, the outer surface of said block being metallized to define a shield electrode which covers the metering electrode.
Dependencies are inferred from the claim text.