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, 1988
Filed:
Feb. 12, 1988
Ikuo Tashiro, Yokohama, JP;
Daisuke Ito, Yokohama, JP;
Kunio Matsukura, Kawasaki, JP;
Mituyoshi Morohoshi, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
In a monitoring system for detecting a quench in a superconductive coil to which AC power is supplied, a switch apparatus is connected between the coil and a A.C. power source. A voltage between a top of the coil and a dividing resistor connected in parallel with the coil is detected and converted into a voltage signal by a insulation amplifier and a current flowing through the coil 1 is detected by a current detector and is converted into a current signal by an amplifier. The voltage signal is detected with the current signal as a reference signal by a phase detector so that a signal component of the voltage signal in phase with the reference signal is outputted from the phase detector. The signal component is averaged in a averaging circuit, when the voltage signal is out-of-phase with the reference signal, an output signal is generated as an alarm signal from the averaging circuit.