Polarized reversible magnet
Patent 5196816 Issued on March 23, 1993. Estimated Expiration Date: 
March 25, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 25, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesElectromagnetic switching device Self-sustaining solenoid Patent #: 4419643 InventorsAssigneeApplicationNo. 857196 filed on 03/25/1992US Classes:335/78, Polarity-responsive335/80, Armature structure335/128By pivotal or rockable armatureExaminersPrimary: Donovan, LincolnAttorney, Agent or FirmInternational ClassH01H 051/22Foreign Application Priority Data1991-04-04 DEAbstractA polarized, reversible magnet with an essentially U-shaped yoke includes an upper coil former flange constructed like a frame and which fronts on yoke legs provided with tab-like integral moldings which in turn engage recesses of the upper coil former flange. Permanent magnets and pole pieces are inserted from above through appropriate openings of the upper coil former flange into the magnetic system.Field of SearchPolarity-responsiveStorage or memory type (e.g., bistable) Armature structure Freely movable within coil or magnetic field between poles Floating (i.e., no fixed pivot) Contact structure of composition Magnetic structure (e.g., saturable) Pole structure With adjusting means Armature structure By pivotal or rockable armature Movable contacts on circular card or comb structure By reciprocating armature With adjustable, replaceable or interchangeable structural features Contact structure or arrangement | |
