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:
Jul. 29, 1986
Filed:
Sep. 20, 1984
Berry Leong, Buffalo Grove, IL (US);
David Krueger, Arlington Heights, IL (US);
Littelfuse, Inc., DesPlaines, IL (US);
Abstract
An electrical fuse features a pyrotechnic smoke-generating mixture supported proximate to or adheringly supported on a meltable fuse wire element. A portion of the fuse housing is transparent. Upon either low current or high current blowout the local temperatures attendant thereto cause ignition of the pyrotechnic mixture and evolution of a cloud of colored smoke which deposits on the interior of the transparent portion of the housing to yield a readily visible indication that the fuse has blown. Additionally, when the fuse is operated at temperatures close to blowout conditions, a different colored smoke is produced to indicate incipient fuse deterioration.