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:
Feb. 04, 2003
Filed:
Dec. 08, 2000
Uwe Kaltenborn, Remetschwil, CH;
Ralf Strümpler, Gebenstorf, CH;
Joachim Glatz-Reichenbach, Baden, CH;
Felix Greuter, Baden-Rütihof, CH;
ABB Research Ltd, Zurich, CH;
Abstract
A fuse has a fuse element ( ), composed of silver, with constrictions ( ) which follow one another at regular intervals, and which fuse element makes contact with a combustible element ( ), preferably over its entire length. The combustible element ( ) is composed of a combustion compound, which is essentially of a fuel such as guanidine or a guanidine derivative and a metal such as Mg or Al and an oxidant such as KNO , NaNO , NH NO , KClO , NaClO , KMnO , the proportion of which is overstoichiometric by a factor of at least 1.1, and preferably of at least 10. The combustible compound also preferably contains a binding agent such as paraffin, a thermoplastic or an elastomer, so that it can be extruded. It has an ignition temperature of between 160° C. and 260° C. and emits more than 200 J/g of heat, so that it ignites even in the event of small overcurrents and melts the entire length of the fuse element ( ).