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:
Apr. 09, 1991
Filed:
Jan. 03, 1990
Jozef H Knoben, Hengelo, NL;
Jan B Wensink, Hengevelde, NL;
Holec Systemen en Componenten B.V., Hengelo, NL;
Abstract
Trip device of the suction or pull-in armature type, having a yoke (18; 35) supporting a fixed permanent magnet (22) and a movable elongated armature (23) having a head member (25). The armature (23) and the yoke (18; 35) forming a first magnetic circuit for holding the armature (23) in a first position with the permanent magnet (22), in which first position the head member (25) protrudes outside the yoke (18; 35). For moving the armature (23) electromagnetically and/or electrothermally to a second position in which the head member (25) protrudes further outside the yoke (18; 35), the yoke (18; 35) is provided with electrothermal bimetal device (33; 37). For moving the armature (23) to the second position independently of the polarity of an electrical current, a second magnetic circuit is provided, consisting of a further yoke and one or more magnet windings (30), or consisting of a pair of mutually magnetically separate branches (44, 45; 50, 51) magnetically connected in series with the first magnetic circuit, and one or more magnet windings (46) for mutually oppositely magnetizing the branches (44, 45; 50, 51).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile