Magnetic holder for contact sensor
Patent 5642089 Issued on June 24, 1997. Estimated Expiration Date: 
July 5, 2014. 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.
July 5, 2014. 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 References 3477050 Magnetic holding device Patent #: 4652845 InventorAssigneeApplicationNo. 270997 filed on 07/05/1994US Classes:335/285, Work or object holding type335/298Movable or adjustable coresExaminersPrimary: Donovan, LincolnAttorney, Agent or FirmInternational ClassH01F 007/20Foreign Application Priority Data1993-07-08 DEAbstractHolding device for magnetically mounting a contact sensor on a curved magnetic surface, for example on a pipeline or on a housing of a bearing, comprising at least two movable pole shoes having the same poling and, in the neighbourhood thereof, a plunger-like pole shoe with opposite poling. The plunger-like pole shoe is displaceable relative to the other pole shoes and the magnets and, upon contacting of the holding device is displaced towards the mounting surface by the magnetic force.Field of SearchWork or object holding typeWith workpiece to magnet adapted or fixture (e.g., to bridge flux) Angularly adjustable fixture Rotary-type magnetic chuck (permanent or electromagnet type) Electromagnet type (e.g., electromagnetic chuck) With circuit control means Lifting or attracting type (e.g., for lifting pigiron or pulling hairpins) Hermetically sealed or moisture-proofed Hand-held type With outer casing or housing With magnetic-hold control means (e.g., means to control the hold strength) Magnet structure or material Core structure Movable or adjustable cores HAVING MAGNETIC FASTENER MAGNET | |
