Patent · US Expired

Apparatus for monitoring the vacuum of a vacuum switch

US5739419A · kind A · utility

8Cited by

16References

6Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Reinhard Maier · Herzogenaurach, DE
Wolf-Eckhart Bulst · Munich, DE
Thomas Ostertag · Ulm, DE
Oliver Sczesny · Aschheim, DE

Key dates

Filing date	Aug 9, 1996
Grant date	Apr 14, 1998
Priority date	—
Expiry date	Aug 9, 2016

Classification

Technology area (CPC H)Electricity
CPC primaryH01H2033/6686
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An apparatus for monitoring the vacuum of a vacuum switch having at least one vacuum switch tube with a switch chamber and switch contacts is provided. The apparatus has a remotely interrogatable pressure measurement sensor in the form of a piezocrystal or surface acoustic (SAW) device arranged in the interior of the vacuum switch tube and a remote interrogation device placed external to the vacuum switch for monitoring the vacuum via the sensor.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.