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:
Dec. 02, 1980
Filed:
Apr. 13, 1977
Klaus Ragaller, Neuenhof, CH;
BBC Brown, Boveri & Company Limited, Baden, CH;
Abstract
An electrical compression switch operating with a compressed gaseous arc quenching medium comprises a switch chamber containing a pair of disengageable contacts one of which is a pin contact and the other a tubular nozzle contact surrounded by a tubular nozzle made from insulating material engageable with the pin contact and which surrounds the tubular nozzle contact in spaced relation to form a compression chamber. An expansion chamber is secured to the end of the tubular nozzle of insulating material and a differential piston operates within the latter and also within the compression chamber. A switch drive effects movement of the pin contact and differential piston considered as one unit relative to the tubular nozzle contact, the tubular nozzle of insulating material and the quenching medium expansion chamber considered an another unit to effect disengagement of the switch contacts as well as relative movement between the differential piston and tubular nozzle of insulating material in such direction as to decrease the volume of the compression chamber and thereby increase the pressure of the quenching medium at the arc which together with the thermal energy of the arc assists in the switch drive and also assists in arc extinction.