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:
Jun. 29, 1976
Filed:
Jul. 29, 1974
Masayasu Watanabe, Yokohama, JA;
Hokushin Electric Works, Ltd., Tokyo, JA;
Abstract
A magnetic flowmeter wherein liquid to be metered is conducted through a flow tube to intersect a transverse magnetic field produced by an electromagnet, the voltage induced in the fluid being transferred to a pair of electrodes mounted at diametrically opposed positions on the tube. The electromagnet is excited by DC power which is applied thereto periodically, this being effected by means of a switch interposed between the electromagnet and the DC power source. When DC excitation is cut off by the switch, the output voltage of the flowmeter is fed to a first hold circuit, whereas during the excitation period, both the flow signal and zero voltage are fed to a second hold circuit. The outputs from both hold circuits are fed to an amplifier whereby the held zero signal is subtracted from the total voltage of flow signal and zero voltage in order to eliminate zero error due to polarization.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile