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| Number | Title | Issue Date |
| 4678927 | Circuit arrangement for large power transformers A circuit arrangement for large power transformers with a low-voltage winding, a main high-voltage winding and a step winding as well as a step switching device at a Y-point side thereof, includes, at a location between a point connecting the step winding... | 07/07/1987 |
| 4540536 | Method of manufacturing transformer windings embedded in casting resin Method of manufacturing a transformer winding embedded in casting resin by winding coils respectively by themselves and independently of one another for disposition thereof in tandem in axial direction of the winding includes placing the wound coils in a ... | 09/10/1985 |
| 4531108 | Three-phase choke with a five-leg core A three-phase choke, includes a five-leg core formed of a central core leg carrying a winding, two outer core legs each carrying a winding and two return legs, the central and outer core legs being formed of stacks of laminations, a lower yoke having ends... | 07/23/1985 |
| 4510475 | Disk coil winding of interwound single or double coils Disk coil winding formed of interwound single or double coils wherein insulation of outer turns opposite inner and outer generated surfaces, respectively, of the winding is reinforced in comparison with normal insulation of conductors of the winding inclu... | 04/09/1985 |
| 4497387 | Transformer with smooth-walled tank Transformer having an active part thereof disposed in an oil-filled, smooth-walled tank having side walls braced by ribs secured by welding and subdivided into wall-high panels, the panels, respectively, including a sheetmetal wall having a resonance freq... | 02/05/1985 |
| 4488134 | Transformer with windings completely embedded in cast resin Transformer, including an iron core, high voltage and low voltage windings, at least one cast resin body completely embedding, holding and insulating the windings, the cast resin body having cooling channels formed therein and having additional channels f... | 12/11/1984 |
| 4486730 | Disc coil winding of interwound single or double coils A disc coil winding of interwound coils is formed of winding conductors covered with normal insulation, the winding having a radially inner and a radially outer surface. A plurality of the coils are disposed at an input to the winding, and have respective... | 12/04/1984 |
| 4419647 | Liquid-cooled transformer for large power ratings Liquid-cooled transformer for large power ratings, including a tank having a bottom with cutouts formed therein, large-area base plates resting on the bottom of the tank, an active part having ends and a pressure device being fastened to the base plates, ... | 12/06/1983 |
| 4390858 | Liquid-cooled transformer for large power ratings Liquid-cooled transformer for large power ratings, including a tank having a bottom, large-area base plates resting on the tank bottom, an active part and a pressure device fastened to the base plates, a plurality of synthetic resin-filled cups disposed i... | 06/28/1983 |
