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. 21, 1988
Filed:
May. 29, 1987
Yoshihiro Hatakeyama, Fukuyama, JP;
Ichirou Arinobu, Fukuyama, JP;
Abstract
A power source device for a circuit breaker responsive to a current output of a current detection circuit having a capacitor chargeable to provide a voltage output and a switching circuit for switching between charging and discharging states of the capacitor. A dummy burden is connected to the switching circuit and set at a substantially equal burden formed by a load and a constant voltage generating circuit to eliminate fluctuations in the charging and discharging states of the capacitor. As a result, accuracy in the detected current output is substantially improved without the use of a high-capacitance and high-withstand-voltage capacity.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile