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. 29, 1994
Filed:
Aug. 13, 1992
John S Bonnesen, Eden Prairie, MN (US);
James D Dewey, Plymouth, MN (US);
ADC Telecommunications, Inc., Minneapolis, MN (US);
Abstract
A fail-safe device is provided for use with a thyristor having a main body sandwiched between electrically conductive end plates. The fail-safe device includes a spring body formed of electrically conductive material having contact surfaces bent about a central fold. The thyristor is placed between the contact surfaces with the end plates in electrical opposition to each contact surface. A conductor plate is disposed between one of the end plates and one of the contact surfaces. The conductor plate includes a lead for electrical connection to the circuit to be protected. The spring body includes a lead for electrical connection to an electrical ground. A dielectric spacer is disposed between the conductor plate and the contact surface. The dielectric spacer is selected to deform in response to an elevated temperature generated by the thyristor during an over-voltage condition.