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:
Nov. 22, 1977
Filed:
Nov. 18, 1976
Takashi Torimaru, Musashino, JA;
Hokushin Electric Works, Ltd., Tokyo, JA;
Abstract
An electromagnetic flowmeter in which the fluid to be metered is conducted through a flow tube where it intersects a magnetic field established by an electromagnet. A pair of electrodes each having a relatively large surface area are mounted at diametrically-opposed positions in the flow tube whereby the electromotive force induced in the fluid and detected by the electrodes when the fluid velocity profile is non-uniform, is averaged and an electromotive force proportional to average flow velocity is obtained. The electromagnet is energized by a low-frequency wave produced by applying the output of a full-wave rectifier coupled to a commercial power line to the excitation coils of the electromagnet through an electronic switching element that acts to periodically chop the full-wave rectified voltage in accordance with high-frequency pulses whose frequency is higher than the power line frequency, the duty cycle thereof being gradually modulated by a low-frequency wave whose frequency is less than the power line frequency.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile