Compact transformer
Patent 4931761 Issued on June 5, 1990. Estimated Expiration Date: 
February 28, 2009. 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.
February 28, 2009. 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 ReferencesMethod of making a bobbin construction for autotransformer ballast Bobbins coils with terminal housing Bobbins coils with terminal housing Patent #: 4730178 InventorAssigneeApplicationNo. 317195 filed on 02/28/1989US Classes:336/160, With magnetic shunt to increase leakage reactance336/180, WINDING FORMED OF PLURAL COILS (SERIES OR PARALLEL)336/182, Two windings (e.g., transformer)336/192, WINDING WITH TERMINALS, TAPS, OR COIL CONDUCTOR END ANCHORING MEANS336/198Preformed insulation between coil and core (e.g., spool)ExaminersPrimary: Kozma, Thomas J.Attorney, Agent or FirmInternational ClassesH01F 027/26H01F 027/30 Foreign Application Priority Data1988-03-08 JPAbstractHere is disclosed a compact transformer comprising a plurality of core elements so combined to form a complete core defining two closed magnetic circuits, one of these magnetic circuits being provided with primary and secondary windings of a first coil and the other magnetic circuit being provided with primary and secondary windings of a second coil so that inductive portions of these first and second coils are simultaneously activated.Field of SearchPreformed insulation between coil and core (e.g., spool)Coil on a preformed suport or mount WITH CORE CLAMPS, WEDGES OR FASTENERS With magnetic shunt to increase leakage reactance Air gap in magnetic shunt WINDING FORMED OF PLURAL COILS (SERIES OR PARALLEL) Two windings (e.g., transformer) Wound to reduce external magnetic field (i.e., fieldless winding) THREE OR MORE WINDINGS CORE FORMS CASING WINDING WITH TERMINALS, TAPS, OR COIL CONDUCTOR END ANCHORING MEANS PLURAL PART CORE Transformer in the supply circuit Transformer in the supply circuit | |
