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| Number | Title | Issue Date |
| 5387894 | Distribution transformers A distribution transformer has a wound magnetic core (50) of overall circular shape and rectangular cross-section with between two and four overall rectangular shape electric coils (20,30) extending through the core window. The coils (20,30) are pre-forme... | 02/07/1995 |
| 5195615 | Mine shaft conveyance system A mine shaft conveyance system includes a linear motor having spaced, parallel, elongate winding support members carrying stator windings. The winding support members are mountable in a mine shaft so as to extend in the longitudinal direction of the mine ... | 03/23/1993 |
| 5157288 | Phase shifting circuits A phase shifting circuit includes: a pair of input terminals; a pair of output terminals; a variable gain amplifier and an active alternating current integrator, connected in series between the input terminals and the output terminals; and a control circu... | 10/20/1992 |
| 5126604 | Linear motor conveyance system The linear motor conveyance system is intended to power conveyance in shafts, typically mine shafts. The system includes spaced apart, parallel winding support members 10 carrying stator windings and extending in the direction of the shaft. A reaction mem... | 06/30/1992 |
| 5093770 | Electrical energy storage system A circuit arrangement for providing a store of energy for actuating an electrically operable device, incorporating a reservoir capacitor, comprising a transformer having low resistance windings, the primary winding of which is connectable to an alternatin... | 03/03/1992 |
| 5072403 | Equipment for and methods of locating the position of a fault on a power transmission line An equipment for locating the position of a fault (9) on a power transmission line (7) between two ends (11,13) of the line (7) comprising: a voltage (15A,B) and a current (17A,B) sensor located at each end (11,13) of the line (7) for deriving signals rep... | 12/10/1991 |
| 5012184 | Adjustment of disposition of rotation axis in moving coil measuring instruments to correct for their non-ideal operation A moving coil measuring instrument wherein at least one end of the axis (3) of rotation of the moving coil (1) is supported so as to permit adjustment of that end of the axis (3) in a direction substantially perpendicular to the axis (3), such adjustment ... | 04/30/1991 |
