Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 7323844 | Circuit and method for control of a stepper motor A circuit for the control of a stepper motor having a rotor configured as a permanent magnet and a stator configured of at least first and second energized excitation coils enclosing the rotor. Each end terminal of the first excitation coil is connected to the posit... | 01/29/2008 |
| 7293626 | Apparatus and method for steering a vehicle A steering system for a vehicle may include a load displacement system allowing transient loads of the steering mechanism to be displaced. The steering system may also include a first coupling mechanism coupling an electric motor to a rack housing, and a second coup... | 11/13/2007 |
| 7278334 | Electric power steering apparatus An electric power steering apparatus comprises an electric motor for producing a steering assist force, and a speed reduction mechanism for decelerating the rotation of an output shaft in the electric motor. The speed reduction mechanism comprises an input pulley dr... | 10/09/2007 |
| 7239096 | Vehicle seat having an electronic control system An electronic control system (24) for a vehicle seat is provided that includes a seat base (12), a seat back (14), an operator input device (30) and a control circuit (26). The seat base has a seat back motor (34) configured... | 07/03/2007 |
| 7205730 | Article transport vehicle The invention provides an article transport vehicle that includes: a vehicle body; a first wheel that supports the vehicle body; a second wheel that is disposed spaced apart from the first wheel in a fore-and-aft direction, and that supports the vehicle body; a firs... | 04/17/2007 |
| 7170240 | Vehicle seat having an electronic control system An electronic control system (24) for a vehicle seat is provided that includes a seat base (12), a seat back (14), an operator input device (30) and a control circuit (26). The seat base has a seat back motor (34) configured... | 01/30/2007 |
| 7151355 | Electric motor driving system, electric four-wheel drive vehicle, and hybrid vehicle An electric four-wheel drive vehicle includes: an internal combustion engine; a generator for outputting DC electrical power; an inverter for converting DC electrical power, output from the generator, into AC electrical power; and an AC electric motor, which is driv... | 12/19/2006 |
| 6806660 | Motor controlling serial communication device and motor driver A motor controlling serial communication device includes an upper controller having a first IC and a first connector, and motor drivers having second ICs, second connectors and third connectors. First cables and second cables are used for coupling the upper controll... | 10/19/2004 |
| 6577095 | Brushless alternating current electric servo motor drive AC servo motor drives which allow several AC drives to be connected in parallel and allow for the connection and reconnection of AC servo motors to be accomplished primarily through a central processing unit (CPU). Thus, multiple AC servo motor drives may... | 06/10/2003 |
| 6072287 | Polyphase AC machine controller A number N of AC machines, such as motors or generators, are independently controlled by a control system having 2N+1 phases, having N orthogonal sets of phase components. In a particular application, a hybrid vehicle including a generator and an inductio... | 06/06/2000 |
| 5920160 | Power output apparatus and method of controlling the same A power output apparatus (20) of the present invention includes an engine (50), a clutch motor (30) connecting with a crankshaft (56) of the engine (50), an assist motor (40) connecting with a drive shaft (22), and a controller (80) for controlling the cl... | 07/06/1999 |
| 5905346 | Power output apparatus and method of controlling the same A power output apparatus (20) of the present invention includes a clutch motor (30), an assist motor (40), and a controller (80) for controlling the clutch motor (30) and the assist motor (40). The clutch motor (30) includes an outer rotor (32) linked wit... | 05/18/1999 |
| 5903112 | Power output apparatus and method of controlling the same A power output apparatus (20) of the present invention includes a clutch motor (30), an assist motor (40), and a controller (80) for controlling the clutch motor (30) and the assist motor (40). The clutch motor (30) includes an outer rotor (32) linked wit... | 05/11/1999 |
| 5903113 | Power output apparatus and method of controlling the same A power output apparatus (20) of the present invention includes a clutch motor (30), an assist motor (40), and a controller (80) for controlling the clutch motor (30) and the assist motor (40). The clutch motor (30) includes an outer rotor (32) linked wit... | 05/11/1999 |
| 5530323 | Drive synchronization system for plural motor systems A system for synchronizing a plurality of motors is disclosed. The system includes a universal drive controller which can control the operation of two motors, a power module for each motor, and a power module interface rack which is utilized to interconne... | 06/25/1996 |
| 4999550 | Automatic rear wiper control A motor vehicle has front and rear electric motor driven wiper mechanisms including front and rear control switches effective to independently activate and deactivate front and rear wiper operation and front and rear park switches effective to independent... | 03/12/1991 |
| 4988930 | Plural motor fan system with improved speed control A two motor assembly for driving two fan blades to move air through a heat exchanger comprising a first two speed DC motor comprising magnets for establishing a fixed magnetic field, an armature rotor rotatable to drive a first fan blade, a multiplicity o... | 01/29/1991 |
| 4939431 | Control system for synchronous rotation of cutter heads, for use in shield machine In a control system for synchronous rotation of the cutter heads in a multi-cutter shield machine, the rotation cutter heads are so disposed in generally the same plane such that the distance between the centers of the adjoining cutter heads is larger tha... | 07/03/1990 |
| 4931705 | Circuit arrangement for textile machines, particularly spinning machines having individually motor-driven spindles In a circuit arrangement for textile machines having a plurality of identical aggregates, each having a drive motor (1), particularly for spinning machines having individually driven spindles, respective motor bars are provided for the connection of each ... | 06/05/1990 |
| 4887941 | Method and apparatus for starting series-coupled vacuum pumps A method of starting series-coupled vacuum pumps comprising a primary pump (A) and at least one secondary pump (B) connected between the primary pump and an enclosure (E) in which a vacuum is to be established, the method consisting in starting the primar... | 12/19/1989 |
| 4782271 | Electronic motor control circuit A motor control circuit is utilized to monitor and control the power to two series connected 110-120 VAC motors, to detect an imbalance between the operation of the two motors, and to remove the power to both motors if one motor operates in an abnormal ma... | 11/01/1988 |
| 4686433 | Motor-driven power booster A motor-driven power booster suitable for use in a motor-driven power steering system. The power booster comprises a casing, input and output shafts rotatably supported on the casing, a first motor for driving the output shaft, a second motor for driving ... | 08/11/1987 |
| 4559482 | Automotive rim roll forming drive system An electric drive system for automotive wheel rim forming equipment having inner and outer forming rolls mounted on driven spindles. The drive system includes separate drives for each forming roll and a control system for maintaining a predetermined speed... | 12/17/1985 |
| 4393338 | Vehicle propulsion motor control apparatus A solid-state direct current motor control apparatus including a programmed microprocessor operative with a plurality of series motors to determine the selection of a power mode of operation, a brake mode of operation and a coast mode of operation, with a... | 07/12/1983 |
| 4357561 | Automotive rim roll forming drive system An electric drive system for automotive wheel rim forming equipment having inner and outer forming rolls mounted on driven spindles. The drive system includes separate drives for each forming roll and a control system for maintaining a predetermined speed... | 11/02/1982 |
| 4355267 | Propulsion motor control apparatus A solid-state motor control apparatus operative with a plurality of series motors to determine the selection of a power mode of operation and a brake mode of operation, and including a plurality of current sensors to establish the current flow in the moto... | 10/19/1982 |
| 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 |
| 4320327 | Automotive rim roll forming drive system An electric drive system for automotive wheel rim forming equipment having inner and outer forming rolls mounted on driven spindles. The drive system includes separate drives for each forming roll and a control system for maintaining a predetermined speed... | 03/16/1982 |
| 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 |
| 4208620 | Plural electric motors driving common load and having interconnections for load control A twin electric motor drive for a grinding mill has substantially identical synchronous motors mechanically connected to the drive of the mill, and the stator winding which generates a revolving magnetic field in each motor comprises a plurality of phase ... | 06/17/1980 |
