| Patents for H01F 27 - Details of transformers or inductances, in general (43,362) |
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| 05/22/1979 | US4155864 Endcapped polydimethylsiloxane and minor amount of another polysiloxane; dielectric fluids in electrical apparatus |
| 05/22/1979 | CA1055128A1 Inductive device with bobbin and method of manufacture |
| 05/15/1979 | US4155061 Inductor casing |
| 05/08/1979 | US4153891 Transient voltage distribution improving line shield for layer wound power transformer |
| 05/08/1979 | CA1054194A1 Oil immersible current limiting fuse assembly |
| 05/08/1979 | CA1053894A1 Dielectric compounds |
| 04/18/1979 | EP0001387A1 Tap changer with a screening electrode |
| 04/17/1979 | CA1052875A1 Series reactor |
| 04/10/1979 | US4149136 Core lamination for shell-type cores, preferably for transformers |
| 04/10/1979 | US4149135 Electrical coil and method of producing the same |
| 04/10/1979 | US4149134 Vaporization-cooled electrical apparatus |
| 04/03/1979 | CA1052003A1 Arrangement for rendering watertightness at electrical connections on power transformers |
| 04/03/1979 | CA1051985A1 High-voltage transformer comprising a foil winding |
| 03/27/1979 | US4146860 Electrical coil assembly |
| 03/27/1979 | US4146858 Coil assembly for an electromagnetic high energy impact apparatus |
| 03/27/1979 | US4146857 Ignition coil for engine ignition system |
| 03/27/1979 | US4146112 Sound reducing baffle for electrical apparatus |
| 03/20/1979 | US4145679 Vaporization cooled and insulated electrical inductive apparatus |
| 03/20/1979 | CA1051103A1 Fluid filled transformer |
| 03/13/1979 | US4144402 Power supply with replaceable high-voltage bushing |
| 03/06/1979 | US4143272 Power supply for electron beam guns |
| 03/06/1979 | US4142983 Phthalate mixtures useful as liquid dielectrics |
| 02/27/1979 | CA1049338A1 Increasing the dielectric strength in metal electrodes |
| 02/21/1979 | EP0000786A1 Closed type boiling cooling apparatus |
| 02/20/1979 | US4140987 Core of a core-type transformer |
| 02/20/1979 | US4140961 Shunt circuit for an insulation type current transformer to adapt to a wide-band of frequency |
| 02/20/1979 | US4140174 Radiator assembly for fluid filled electrical apparatus |
| 01/23/1979 | US4136322 Single-phase three-legged core for core type transformer |
| 01/23/1979 | CA1047134A1 Inductive voltage transformer for a high-voltage metal-clad switch-gear installation |
| 01/16/1979 | US4135173 Low volume sheet-wound transformer coils with uniform temperature distribution |
| 01/16/1979 | US4135172 Electrical inductive apparatus |
| 01/16/1979 | US4135127 Direct current transformer |
| 01/16/1979 | CA1046600A1 Series/parallel connected single phase power transformer |
| 01/09/1979 | US4134091 Low cost, high efficiency radio frequency transformer |
| 01/02/1979 | US4132853 Electrical bushing |
| 12/26/1978 | US4131867 Lamp ballast attachment device |
| 12/19/1978 | CA1044737A1 Sudden pressure relay having seismic protection |
| 12/12/1978 | US4129846 Inductor for magnetic pulse working of tubular metal articles |
| 12/12/1978 | US4129845 Vaporization cooled electrical apparatus |
| 12/12/1978 | CA1044343A1 Clamping of transformer windings by means of hydraulic power amplifiers |
| 12/12/1978 | CA1044341A1 Electrical equipment having radial cooling channels with means for guiding cooling fluid through the channels |
| 11/28/1978 | US4127695 Method of insulating electromagnetic coils |
| 11/21/1978 | US4126844 Electrical inductive apparatus |
| 11/21/1978 | US4126843 Attachment of insulating collars |
| 11/07/1978 | US4124834 Electrical inductive apparatus |
| 10/24/1978 | US4121627 Wire handling apparatus for an electric coil forming machine |
| 10/17/1978 | CA1040696A1 Corona suppression in high voltage windings |
| 10/17/1978 | CA1040489A1 Method of making electrical coils using patterned dry resin coated sheet insulation |
| 10/10/1978 | US4119555 Dielectric compositions comprising polychlorobenzene-alkyl terphenyl mixtures |
| 10/03/1978 | US4118678 Coil retaining case |
| 10/03/1978 | US4118103 Double-ended connecting device |
| 10/03/1978 | CA1039795A1 Discharge lamp lighting apparatus and method |
| 09/26/1978 | US4117525 Overpressure protection for vaporization cooled electrical apparatus |
| 09/12/1978 | US4112737 Transformer fault detection |
| 09/12/1978 | CA1038464A1 Transformer with foil conductors |
| 09/05/1978 | US4112481 Miniature multi-impedance transformer module |
| 09/05/1978 | US4112405 Coil with protection against overheating |
| 09/05/1978 | US4112403 Saturated reactor arrangements |
| 09/05/1978 | US4112043 Electrical conductor for a bushing and method of making an electrical bushing |
| 09/05/1978 | CA1038051A1 Electrostatic shielding of disc windings |
| 08/22/1978 | US4109224 Precision injection-molded coil form and method and apparatus for manufacture |
| 08/22/1978 | US4109223 Multiple choke assembly |
| 08/22/1978 | US4108789 Dielectric compositions containing benzyl esters |
| 08/15/1978 | US4107636 Plug-in adaptor |
| 08/15/1978 | CA1036680A1 Insulated transformer windings |
| 08/15/1978 | CA1036434A1 Encapsulation method |
| 08/08/1978 | US4105984 High voltage device containing a flexible prepreg |
| 08/08/1978 | US4105931 Inductor structures for electrical discharge lamp circuits |
| 08/01/1978 | US4104184 Electrical devices containing select vinylsiloxane dielectric fluids |
| 07/25/1978 | US4103268 Dual coil hinged bobbin assembly |
| 07/25/1978 | US4103267 Hybrid transformer device |
| 07/11/1978 | US4100521 Iron core for induction apparatuses |
| 07/11/1978 | US4100366 Method and apparatus for cooling electrical apparatus using vapor lift pump |
| 07/04/1978 | US4097987 Method of manufacturing an inductive coil |
| 06/27/1978 | US4097681 Interface for high voltage oil-filled and gas-filled apparatus |
| 06/20/1978 | US4095557 Apparatus for making electrical coils using patterned dry resin coated sheet insulation |
| 06/13/1978 | US4095206 Encapsulated transformer assembly |
| 06/13/1978 | US4095205 Transformer with improved insulator |
| 06/13/1978 | US4095204 Transformer having forced oil cooling system |
| 06/13/1978 | US4095124 Transformer/switch device |
| 06/06/1978 | US4092864 Hot spot thermometer |
| 05/30/1978 | US4092621 Thin foil pulse transformer coil for reducing distributed and leakage inductance |
| 05/30/1978 | US4092582 Electrical coupling arrangements |
| 05/30/1978 | US4092484 Arrangement to prevent corona discharge and electric rupture in high voltage electrical components |
| 05/23/1978 | US4091439 High voltage power supply with internal counterbalancing mechanism |
| 05/23/1978 | US4091349 High voltage winding lead and terminal structure |
| 05/16/1978 | US4090225 Fail-safe circuit for tap-changing transformer regulating system |
| 05/09/1978 | US4089049 Inverter circuit including transformer with shielding of undesired radiations |
| 05/02/1978 | US4087774 Information transmitting system |
| 04/25/1978 | US4086552 High-voltage transformer comprising a foil winding |
| 04/25/1978 | US4085603 Method of making V-shaped magnetic circuit elements |
| 04/18/1978 | US4085395 High voltage transformer package |
| 04/11/1978 | US4084144 High voltage winding comprising several component coils for voltage transformers |
| 04/11/1978 | US4084143 Transformer mounting assembly |
| 04/04/1978 | US4083026 Arrangement with inductive voltage transformers |
| 04/04/1978 | US4082916 Encapsulated electrical inductive apparatus |
| 04/04/1978 | US4082866 Method of use and electrical equipment utilizing insulating oil consisting of a saturated hydrocarbon oil |
| 04/04/1978 | US4082141 Ballast vibration isolation system with thermal path |
| 04/04/1978 | US4081900 Method of forming covers for electrical equipment |
| 03/28/1978 | US4081777 Ferromagnetic core with variable shunt air gap |