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| Number | Title | Issue Date |
| 4376913 | Method and apparatus for synchronously driving AC synchronous motors A plurality of AC synchronous motors used to drive respective machines in a manufacturing or packaging assembly line or system are driven in speed and phase synchronization. A common AC current supply signal is inverted to provide one polyphase set of ser... | 03/15/1983 |
| 4375047 | Torque compensated electrical motor An electric motor having a cage pivotally mounted at one end to a post interior a housing by a first bearing and at its other end by a second bearing between the exterior of the cage and the interior of the housing. A first stator is mounted to the interi... | 02/22/1983 |
| 4373147 | Torque compensated electric motor An electric motor having a first rotor on an output shaft, a first stator pivotally mounted to a housing, a second rotor mounted to the first stator and a second stator mounted to the housing. The second stator is driven with a control signal which is a f... | 02/08/1983 |
| 4354144 | Transmissionless drive system A continuously variable transmissionless drive system providing maximum torque at low speeds. The system is usable in a hybrid vehicle having a prime mover, such as an internal combustion engine, operated at its optimum rpm for efficiency. The prime mover... | 10/12/1982 |
| 4353015 | Apparatus for changing the relative phase angles of output shafts of a multiple motor electric drive An apparatus for changing the relative angles of the output shafts of a multiple-motor electric drive. For this purpose, the appropriate synchronous motor is switched to a phase-shifting frequency changer and its relative shaft (mechanical phase) angle is... | 10/05/1982 |
| 4350936 | Cascaded fin winding machine control and method Apparatus and a method for controlling the operation of a fin winding machine. Various motor drives are utilized to regulate the speed of rotation of a heat exchange tube upon which fin is wrapped to regulate the speed of rotation of forming wheels for be... | 09/21/1982 |
| 4309642 | Device for feeding a wire electrode Device for feeding a consumable wire electrode. Two feeding units are mounted in tandem. Each of the feeding units is provided with a pair of rolls and coupled to a direct current motor driving one of the rolls in the pair. The two motors are connected in... | 01/05/1982 |
| 4300078 | Method of constructing models of rotary electrical machines to provide simultaneous similitude of electromagnetic, thermal and mechanical working conditions of the rotor The method makes possible experimentation on reduced scale models, more especially in non-stationary operating conditions, of the rotor of rotary electrical machines respecting the physical conditions which ensure in the rotor under test a simultaneous si... | 11/10/1981 |
| 4289997 | Drive apparatus having at least two electric motors A drive apparatus has at least two electric motors. There is also a central control common to all motors which lie in series in a closed-circuit energy supply. Each motor has an individual control unit which can be turned on and off from the central contr... | 09/15/1981 |
| 4288727 | Modular motor and control means and method An arrangement of electric motors which are coupled together both mechanically and electrically comprises series pass elements and current sensing devices in the power circuits of the respective motors, each current sensing device having an output voltage... | 09/08/1981 |
| 4259621 | Arrangement for guiding the rotary speed of one or more follower motors in response to the pulse frequency of a guide pulse frequency generator A speed regulator for a guide and follower motor assembly. A guide pulse frequency generator driven by a guide motor drives a frequency converter which drives a follower motor. The frequency converter includes a frequency regulator with a negative feed ba... | 03/31/1981 |
| 4222512 | Device for controlling rotary motion A rotary drive device for effecting, for example, displacement of a printing roller towards or away from a pressure roller in a printing press, is formed by a direct current or alternating current high speed motor coupled mechanically to a permanent magne... | 09/16/1980 |
