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:
Feb. 27, 1987
James Spooner, Sunderland, GB;
Northern Engineering Industries PLC, New Castle upon Tyne, GB;
Abstract
The rating of an arc interrupter is improved by having a movable contact assembly, which is engageable with and completely disengageable from a fixed contact in make and break positions, respectively, consisting of two main current carrying members the first of which is the last part of the assembly to disengage from the fixed contact during an opening operation. The delay in disengaging the first contact member from the fixed contact can be achieved in several ways. For example, the geometry of the first contact member can be different from the geometry of the second contact member (by the provision of an arcing tip); by the provision of a lost-motion mechanism; or by the provision of an auxiliary contact.