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. 14, 2004
Filed:
Jun. 02, 2003
Uwe Kaltenborn, Baden-Dättwil, CH;
Guido Hoffmann, Wettingen, CH;
ABB Research LTD, Zurich, CH;
Abstract
The impact signaling system ( ) is used in a high-voltage protective device and has a housing ( ), a spring ( ) which is arranged in the housing ( ) and has a moveable end, an actuator ( ) which can be passed out of the housing ( ) and interacts with the moveable end of the spring ( ), a high-resistance resistor wire ( ) which is connected in parallel with a fusible wire of the protective device, and a holder which absorbs the prestress of the spring ( ). The holder contains a section of the high-resistance resistor wire ( ) which is in the form of a winding ( ) and is passed at least once around the moveable end of the spring ( ) in order to form the prestress, and which is at least partially in thermally conductive contact with the material of the activator ( ). Above a limit temperature, the activator ( ) lifts, for example by destruction of the winding ( ) or by melting through, the holder and activates the impact signaling system ( ) by reducing the load on the spring ( ).