The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 11, 1983
Filed:
Dec. 22, 1981
Kazuie Suzuki, Tokyo, JP;
Hokushin Electric Works, Ltd., Tokyo, JP;
Abstract
An electromagnetic flowmeter for measuring the flow rate of a ferromagnetic slurry which is conducted through a flow tube having electrodes mounted thereon, the slurry intercepting a magnetic field to induce a signal in the electrodes which depends on flow rate. The field is established by an electromagnetic circuit whose core has a gap defined by the tube, an excitation coil being wound about the core. The magnetic resistance of the circuit changes as a function of the ferromagnetic concentration of the slurry, this change affecting the inductance of the coil. To provide an output signal which accurately reflects flow rate regardless of ferromagnetic concentration, the output signal is corrected in accordance with the changing inductance of the excitation coil.