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. 30, 1987
Filed:
Jun. 11, 1984
Walton N Hershfield, Stevensville, MT (US);
Power Integrity Corporation, Greensboro, NC (US);
Abstract
A transient surge suppression system utilizes a negative resistance voltage breakdown device such as a gas discharge tube or a semiconductor device such as a SIDAC in series with a resistance element, preferably a non-linear resistance element, such as a varistor or Zener diode, to limit the amplitude of voltage transients applied to electrical equipment being protected. The breakdown device breaks down when a sufficiently high amplitude voltage transient is applied thereto, and the resistive element serves to protect the breakdown device from damage by excessive follow-on current. If a non-linear resistance device is used as the resistance element, the voltage across the combination is reduced at high currents. Several units may be cascaded to achieve sequential breakdown of multiple devices to thereby share the surge current among several devices and to reduce the dynamic impedance of the circuit and to multiply power dissipation capacity of the transient voltage surge suppression system.