Did You Know...
...that the video game, Pong, was invented by a guy who graduated at the bottom of his engineering class? Nolan Bushnell spent more time running the games at a local amusement park than he did on his studies at the University of Utah. His dreams of working for Disney's amusement empire were dashed when the company wouldn't hire him. Taking a boring job, Nolan daydreamed about electronic versions of popular games. He invented Pong, the first video game, and went on to found Atari Co.
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| Number | Title | Issue Date |
| 7325498 | Hybrid energy off highway vehicle propulsion circuit A system and method for retrofitting a propulsion circuit of an existing Off Highway Vehicle to enable the propulsion circuit to operate as a hybrid energy Off Highway Vehicle propulsion circuit. The hybrid propulsion circuit includes a primary power source, and a t... | 02/05/2008 |
| 7285926 | System and method for locomotive adhesion control A traction control system for controlling an electric traction motor drivingly coupled to a wheel of a tractive vehicle. The traction control system includes means for determining speed of the wheel, means for determining tractive effort of the wheel and a control c... | 10/23/2007 |
| 7256974 | Electrical ground isolation and secondary failure reduction detection and isolation A system for isolating electrical ground faults and secondary failures in an electrical system, the system comprising an AC ground isolation state machine for detecting and isolating an AC ground, a DC ground isolation state machine for detecting and isolating a DC ... | 08/14/2007 |
| 7256513 | Locomotive auxiliary power system A locomotive auxiliary power system and control techniques for such a system are provided. In one exemplary embodiment the auxiliary power system includes an auxiliary alternator coupled to the internal combustion engine of the locomotive. The system further include... | 08/14/2007 |
| 7231877 | Multimode hybrid energy railway vehicle system and method A hybrid energy railway vehicle system having a traction motor with a dynamic braking mode of operation for dynamically braking the traction motor and for generating dynamic braking electrical energy and an electrical energy storage system that is in electrical comm... | 06/19/2007 |
| 7230190 | System and apparatus for adjustable keyboard arrangements Some embodiments of the invention include an apparatus and system for keyboard arrangements where one or more of the keys are adjustable. In some embodiments, the arrangement includes one or more keys and a moving mechanism for controlling the position of the keys. ... | 06/12/2007 |
| 7216943 | Hybrid vehicle A hybrid vehicle is capable of performing regenerative operations of generator-motors disposed adjacently to front wheels and/or rear wheels of the vehicle so as to achieve efficient conversion of kinetic energy of the vehicle into electric energy as much as possibl... | 05/15/2007 |
| 7208894 | Electric vehicle motor and control system with high efficiency regeneration The present invention is an electric vehicle power system that uses multiple permanent magnet motor/generators connected in series or parallel and multiple battery step switching. Motor, torque and speed are controlled by steps in series connection and then in paral... | 04/24/2007 |
| 7190146 | Control system and method for an overhead bridge crane Included herein is a system and method for controlling a velocity vector of an overhead crane. A motor is attached to the crane and is positioned to move the overhead crane and has an output vector including a rotational direction and a rotational speed. A variable ... | 03/13/2007 |
| 7157871 | Intermittent drive control apparatus of motor Rotation of a capstan motor is detected by a frequency detector, and supplied to a CPU as a rotation detection signal CFG. The CPU derives a period of the rotation detection signal CFG, calculates an average rotational speed of the capstan motor on the basis of the ... | 01/02/2007 |
| 7126070 | Rocker paddle switch with flexible cam driver There is disclosed a paddle switch operated by pushing on the lower portion of a rocker paddle to turn the switch “on” or “off”. The lower edge of the paddle pivots in and out about its upper edge. The switch includes flexible driver means coupled to be driv... | 10/24/2006 |
| 7122754 | Rocker paddle switch with articulated cam driver There is disclosed a paddle switch operated by pushing on the lower portion of a rocker paddle to turn the switch “on” or “off”. The lower edge of the paddle pivots in and out about its upper edge. The switch includes articulated driver means coupled to be d... | 10/17/2006 |
| 7098616 | Control device for a motor unit of a food processor A control device includes a control module controlling a polarity switching unit connected electrically to a motor unit of a food processor to provide a first current path for an input power signal through the motor unit when the control module is operated in a proc... | 08/29/2006 |
| 7095188 | Serial fan set and rotation speed-matching curve generation method thereof A serial fan set and rotation speed-matching curve generation method thereof are provided. The serial fan set comprises a rotation speed control module, a first fan and a second fan, in which the rotation speed control module is used to receive the power signal and ... | 08/22/2006 |
| 7067754 | Bezel-button assembly and method A bezel-button assembly comprising at least one button connected to a bezel. The button is moveable between a first position and at least a second position. An elastic layer connects the bezel to the button and is adapted to provide at least a partial mechanical bia... | 06/27/2006 |
| 7061131 | Method and system for optimizing energy storage in hybrid off-highway vehicle systems and trolley connected OHV systems A hybrid energy system for propelling an off-highway vehicle includes an engine rated at a first power capacity, and a power converter driven by the engine for providing primary electric power. A traction motor system receives the primary electric power, the tractio... | 06/13/2006 |
| 7034236 | Rocker paddle switch with semi-rigid cam driver There is disclosed a paddle switch operated by pushing on the lower portion of a rocker paddle to turn the switch “on” or “off”. The lower edge of the paddle pivots in and out about its upper edge. The switch includes semi-rigid spiral wound driver means hav... | 04/25/2006 |
| 7023152 | Driving control device for actuator A driving control device for an actuator comprises a driving device to drive an actuator having an electric motor (30) and a driving control device (50) to control the rotation of the electric motor (30) by controlling the driving device. The dr... | 04/04/2006 |
| 7019483 | Devices for position-controlled stopping of rotating components with position-controlled drive mechanisms in the case of voltage loss The position-controlled stopping of rotating components of shaftless drive mechanisms, in the case of a loss of voltage, is accomplished by the provision of an external connectable network. That external connectable network supplies the process power which is missin... | 03/28/2006 |
| 6979791 | Rocker paddle switch with articulated cam driver There is disclosed a paddle switch operated by pushing on the lower portion of a rocker paddle to turn the switch “on” or “off”. The lower edge of the paddle pivots in and out about its upper edge. The switch includes articulated driver means coupled to be d... | 12/27/2005 |
| 6967298 | Motor switch cell A motor switch cell is provided comprising a switch cell actuator slidably engaged to a switch cell base. The switch cell actuator is slidable between a neutral actuator position and a first active actuator position. A first contactor element generates electrical co... | 11/22/2005 |
| 6888058 | Electronic musical instrument Main speakers are arranged on the enclosure front surface of an electronic piano. Auxiliary speakers (18L, 18R) are arranged on the rear surface of the enclosure. Microphones are arranged in close proximity of the main speakers. A performance sound is ... | 05/03/2005 |
| 6580244 | Active damping and backlash control for servo systems Two motors are used to provide motion control in a transport drive system. A primary motor, or a primary and secondary motor, provides primary power for accelerated motion. PWM signals are used to drive the motors according to predetermined fixed function... | 06/17/2003 |
| 6552505 | Method for driving motors and apparatus for driving motors A method is provided for driving a motor apparatus having a first motor, a second motor, and a motor power supply commonly used for the first motor and the second motor. The first motor is a brushless motor. An electrical power is supplied from the motor ... | 04/22/2003 |
| 6497182 | Railroad locomotive traction motor isolation A railroad locomotive includes traction motors for propelling the locomotive, and an isolation switch disposed in signal communication with at least one of the traction motors for isolating a faulting motor from the other traction motors.... | 12/24/2002 |
| 6208096 | Optimized winding drive In a tape transport for recording and/or reproducing signals by means of a recording medium using separate winding motors for driving the winding plates, the drive of the winding motors servo units is constructed as open-loop control devices and/or closed... | 03/27/2001 |
| 6118234 | Method and apparatus for effecting dynamic braking of a direct current motor A double pole, double throw switching arrangement for effecting dynamic rotor braking of user controlled operation of a reversible direct current servo motor. Two columns of stationary center and oppositely disposed side contacts are disposed in spaced pa... | 09/12/2000 |
| 6028403 | Vehicle control apparatus The present invention provides a downsized vehicle control apparatus which is capable of controlling two DC separately excited motors. An armature of a first motor, an armature of a second motor and an armature chopper element for controlling the drive of... | 02/22/2000 |
| 5894204 | Spindle motor control method and disk unit A spindle motor control method stops a spindle motor which rotates in a forward direction in response to a rotation signal. The spindle motor control method includes two steps. First, a brake signal is supplied to the spindle motor for rotating the spindl... | 04/13/1999 |
| 5517092 | Rotation speed sensing in a drive arrangement for a motor vehicle In a drive arrangement of a motor vehicle in which the wheels of the motor vehicle are driven by separate electric motors and the electric motors are powered via a d.c. voltage intermediate circuit by a generator arrangement driven by an internal combusti... | 05/14/1996 |
| 5517093 | Braking grid isolation for locomotive traction motor control system A locomotive traction motor control system includes a traction motor to propel a locomotive when it motors, and to slow the locomotive when it engages dynamic braking. A resistive element dissipates electrical energy generated during dynamic braking. A co... | 05/14/1996 |
| 5248922 | Multi-DSP, multi-functional motion controller A motion controller, which is adaptable to a variety of different motors, provides motor control signals to the motors of a multi-axis coordinated system as a function of position and velocity commands from a host computer. The motion controller configure... | 09/28/1993 |
| 5210473 | System with delay timer for motor load equalization The invention is an improvement in an AC adjustable frequency load-moving system of the type having a control circuit providing a motor speed signal and using command ramps to control each of plural AC squirrel cage motors. The invention helps assure subs... | 05/11/1993 |
| 5034669 | Regenerative circuit for motor drive system having leakage current compensation A regenerative control circuit for controlling the regenerative energy of an electric motor drive system includes a regenerative energy dissipating resistor connected in parallel to a main smoothing capacitor through a switching element, a comparator conn... | 07/23/1991 |
| 4959808 | Method and apparatus for the distance control of a positioning drive A first acceleration reference value is continuously determined by a nonlinear distance control. In parallel thereto, a second acceleration value is generated by a nonlinear velocity controller. A simple selection criterion that comprises only these two a... | 09/25/1990 |
| 4697124 | Integral series parallel and power brake controller for a transit vehicle An integral series parallel changeover and power dynamic brake controller apparatus for a transit vehicle disclosed. The controller utilizes a single cam shaft to operate switches for the series parallel function and the power brake function. The apparatu... | 09/29/1987 |
| 4600865 | Transportation apparatus Transportation apparatus, such as escalators and moving walks, having controlled stopping characteristics. Deceleration is directly regulated via a deceleration servo loop which provides a current reference signal for an inner current loop. Brake current ... | 07/15/1986 |
| 4558263 | All terrain vehicle toy with dynamic braking A childs wheeled riding toy of the three wheeled type having a front steerable wheel and a pair of rear motor driven wheels in which the child sits astride of the toy with his feet resting on opposed foot rest positions of the toy is disclosed having a pa... | 12/10/1985 |
| 4495449 | Electric propulsion system for traction vehicles with automatic retard speed regulation Two separately-excited d-c electric motors are used to drive the wheels of a traction vehicle. The magnitude of motor field current varies as a function of the value of a variable control signal, which value is representative of any deviation of the field... | 01/22/1985 |
| 4489256 | Primary and secondary dynamic braking system A dynamic braking system is provided for electrically driven wheelchairs to slow the wheelchairs to a stop without needing to use a mechanical brake. A primary switch arrangement is provided for connecting resistors across the right and left wheelchair mo... | 12/18/1984 |
