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| Number | Title | Issue Date |
| 7310038 | Electromechanical device for selecting coil voltage and locking the coil in place A system for selecting coil voltage in an electrical device comprises a housing and a coil in the housing having a plurality of windings. Each winding has a pair of pins. A slider supports a plurality of moveable contacts and is moveably mounted in the housing proxi... | 12/18/2007 |
| 7271692 | Slider for selecting coil voltage and locking the coil in place A system for selecting coil voltage in an electrical device comprises a housing and a coil in the housing having a plurality of windings. Each winding has a pair of pins. A slider supports a plurality of moveable contacts and is moveably mounted in the housing proxi... | 09/18/2007 |
| 4713642 | Face connected instrument transformer A face connected instrument transformer is disclosed having a plurality of transformation ratios comprised of two primary windings and a single secondary winding. Each primary winding is electrically connected to a pair of terminals disposed adjacent to o... | 12/15/1987 |
| 4607211 | Method of correcting inaccurate instrumental potential transformer ratio To compensate for voltage ratio errors in a cascaded core instrument potential transformer, the coils of an outer coupling winding otherwise utilized to magnetically couple an adjacent pair of cores together are electrically connected into the primary win... | 08/19/1986 |
