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| Number | Title | Issue Date |
| 7088062 | Electronic variable speed control of dual motor configuration A dual motor configuration 10 includes a primary brushless motor 18 electronically controlled to be driven at various speeds throughout a range of motor speeds. A secondary brush motor 24 electronically controlled be driven at various speeds thr... | 08/08/2006 |
| 6910553 | Building elevator A building elevator with an elevator mast and an elevator car with at least one electric drive motor for the elevator car for moving the same along the elevator mast. A novel overload-prevention device for the building elevator has two drive motors with the device i... | 06/28/2005 |
| 5422550 | Control of multiple motors, including motorized pumping system and method A control system and method for a plurality of motors utilize one, and only one, motor drive unit that provides power to drive any one of the motors. The system and method also utilize a controller that controls which of the motors to energize. Power from... | 06/06/1995 |
| 5363023 | Paper sheet transfer device In the present invention, a plurality of states of a transfer motor and those of a feed motor in a paper sheet transferring device located in a copying machine or the like are detected, and a plurality of sets are generated on the basis of the states acco... | 11/08/1994 |
| 5283506 | Method of and apparatus for regulating the operation of a driving system for a packing machine The operation of a driving system for a cigarette packing machine, wherein the driving system has a rotary main drive and several slave drives electrically connected to the main drive, is controlled in such a way that any selected slave drive can be disco... | 02/01/1994 |
| 5150020 | Driving controlling method for drums of automatic winder In an automatic winder wherein each of a plurality of winding units thereof has a traverse drum driving motor and an inverter for driving the motor, the numbers of those inverters which are to be decelerated and accelerated are controlled in such a manner... | 09/22/1992 |
| 4644232 | Method of and an apparatus for controlling a plurality of DC motors The present invention provides method and apparatus to control a plurality of DC motors each having an encoder by a sole microcomputer. The actual rotating speed of each DC motor is detected in response to the signal from the encoder. A pulse width of a v... | 02/17/1987 |
| 4341982 | Simultaneous independent control system for electric motors A system for simultaneously and independently controlling a plurality of electric motors from a number of dispersed stations. The system operates by transmission of duty cycle modulated selected frequencies superimposed on a DC track voltage on a common p... | 07/27/1982 |
| 4266485 | Control system for economic operation of multiple locomotive trains A system for controlling tractive effort in diesel electric locomotives when train hauling requirements are such that multiple locomotives are required. Equipment and method of operation disclosed provides individual control of lead and trailing units, ut... | 05/12/1981 |
