Relay for a heart defibrillator
Patent 4494544 Issued on January 22, 1985. Estimated Expiration Date: 
January 22, 2002. 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.
January 22, 2002. 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 2426068 2872628 2943170 3541484 InventorAssigneeApplicationNo. 06/197365 filed on 10/15/1980US Classes:607/5Cardioverting/defibrillatingExaminersPrimary: Kamm, William E.Attorney, Agent or FirmInternational ClassesA61N 1/39 (20060101)H01H 50/16 (20060101) H01H 50/30 (20060101) Foreign Application Priority Data1978-09-27 NLAbstractA heart defibrillator in which the relay which connects the high voltage capacitor to the electrodes comprises a switching arm which is mounted on a pivotable armature and the free end of which accommodates a movable contact which co-operates with a fixed contact which comprises a contact face which encloses an angle of between 5° and 30° with the movement direction of the movable contact. The armature has an axial play which is so large that, when the relay is energized, it occupies a first axial position against the force of a spring. The contacts are then pressed one against the other. When the relay is deenergized, the armature is moved to a second axial position by the spring. The contacts are clear of each other in this second axial position. The switching arm is formed by a strip of fibre-glass reinforced epoxy resin, the smallest dimension of which extends perpendicularly to the movement direction of the movable contact.Field of SearchThree or more stagesFilament, electric heater, or resistance in shunt with the discharge electrodes of a discharge device load Electric generator or piezoelectric device Discharge device and transformer Asymmetrical discharge device load Discharge device loads Asymmetrical discharge device loads Inverse parallel connected asymmetric load devices Discharge device or rectifier in the auxiliary starting electrode circuit Periodic switch in the primary circuit of the supply transformer Plural transformers in the supply circuit Auxiliary starting electrode-type discharge device load Transformer or auxiliary winding in the auxiliary electrode circuit Rectifier and/or discharge device in the control circuit Transformer in the supply circuit | |
