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:
Apr. 01, 1997
Filed:
Jun. 05, 1995
Albert Zaretsky, Brooklyn, NY (US);
Leviton Manufacturing Co., In., Little Neck, NY (US);
Abstract
A surge suppressor disconnect protection circuit is coupled to a first surge suppressor electrically coupled to the terminals of an AC source to protect the first surge suppressor from predetermined overvoltages. The circuit includes a relay switch connected in series with the first surge connected to the AC source terminals for rectifying the AC to generate a DC signal. The adjuster filters the DC signal and scales the filtered DC signal. An amplifier is electrically coupled to the adjuster and to and providing a difference signal integrator time constant is electrically connected to the amplifier and produces a signal which is proportional to a length of time the scaled DC signal is greater than the first voltage reference. A comparator is connected to a second voltage reference. The comparator output is electrically coupled to the relay switch which opens the switch contact to set it to a high impedance state when the integrator output signal exceeds the second voltage reference.