Quotables
"It is my heart-warmed and world-embracing Christmas hope and aspiration that all of us, the high, the low, the rich, the poor, the admired, the despised, the loved, the hated, the civilized, the savage (every man and brother of us all throughout the whole earth), may eventually be gathered together in a heaven of everlasting rest and peace and bliss, except the inventor of the telephone. "
Mark Twain ; Christmas greetings, 1890
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| Number | Title | Issue Date |
| 7195115 | Modular-belt conveyors with variable-speed drive motors A conveyor system in which a modular belt or chain is driven by a drive element rotated at a predetermined variable angular speed to compensate for speed fluctuations due to chordal action. A speed signal generator generates a speed signal generally inverse to the u... | 03/27/2007 |
| 7145300 | Multi-axis AC servo control system and method A multiple axis servo control implements a multi-tasking PWM control unit to provide PWM signals for multiple axes in a single unit. A time slice mechanism provides axis selection signals based on a system clock signal to permit control parameters of the selected ax... | 12/05/2006 |
| 7126307 | Interface circuit for actuating an electrical device and circuit arrangement for actuating an electric motor therewith An interface circuit for actuating an electrical consumer, especially a pole-changing rotary-current induction motor, with a first contact element assigned to a signal line carrying an alternating voltage signal to generate at least two different control signals. A ... | 10/24/2006 |
| 7122994 | Control apparatus for a starter/generator system A control apparatus (202) for a starter/generator (110) of an aircraft electrical power system is provided. During a start mode of operation, AC power is provided by the control apparatus (202) to an exciter stator (114) of the starter/ge... | 10/17/2006 |
| 7038421 | Method and system for multiple servo motor control A system for control of a plurality of motors comprising: an inverter including at least three legs, with each leg including two series switching devices configured to receive a command from a controller. The system also includes a first motor operably connected to ... | 05/02/2006 |
| 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 |
| 6342768 | Displacement apparatus arranged for guiding a carrying device along at least two rails A displacement apparatus comprising a first rail and a second rail, extending substantially parallel thereto, while on the first rail a first driving gear with a first motor is provided and on the second rail a second driving gear with a second motor is p... | 01/29/2002 |
| 5939846 | AC motorized wheel control system Torque is distributed by calculating first and second torque commands using a requested torque and a ratio of speeds of first and second wheels and limiting them in accordance with respective torque command approved ranges and approved change rates; conve... | 08/17/1999 |
| 5874813 | Control method, especially for load balancing of a plurality of electromotor drives A load-balancing method for a multiplicity of controlled drives, especially individual electric motors of the rolls of a leveling machine for metal strip, in which all of the motors have speed and current-control circuits and are interconnected by a super... | 02/23/1999 |
| 5708332 | Dual motor drive system A dual motor drive system particularly adapted for the drive of long printing presses provides uncoupled control of both the voltage and current provided to the motors. A current divider proportions the current provided to a main and secondary motor in ac... | 01/13/1998 |
| 5557179 | Control circuit for plural partially interlocked commutator type motors with oscillation damping characteristics At least two commutator type motors are arranged to reduce cyclic voltage imbalances or oscillations by connecting a check diode in series with the armature of each motor, and by partially interlocking the motors by connecting the series winding of a neig... | 09/17/1996 |
| 5537011 | Method and apparatus for promoting even wear in a multiple-motor drivetrain An invention is disclosed which promotes even wear within a multiple-motor drivetrain. In one embodiment of the invention, a vehicle drivetrain includes two motors. The total torque to be provided by the motors is partitioned between the motors such that ... | 07/16/1996 |
| 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 |
| 4619206 | Drive system for a twin suspension haulage cable gondola lift The present invention relates to a gondola lift having two parallel suspension haulage cables between which the gondolas hang. The two cable loops extend between two stations and each cable is driven by a direct current electrical motor, the two motors be... | 10/28/1986 |
| 4614901 | Servo power amplifier having load equalization A servo power amplifier for driving multiple DC motors (10, 12) employs a load equalization circuit (36) which allows reduction of the overall number of circuit components required to drive the motors. The load equalization circuit is coupled in parallel ... | 09/30/1986 |
| 4482848 | Controllable power source A controllable power source is suitable for driving one or more electric motors from a low voltage battery. A converter steps up the d.c. voltage to a higher level at which the motors are designed to operate and a power regulator placed between the conver... | 11/13/1984 |
| 4461958 | Drive system and method for automotive vehicles, especially floor vehicles such as forklift trucks A drive system for an automotive vehicle, especially an industrial floor vehicle such as a forklift truck, comprises an internal combustion engine, preferably a diesel engine, whose speed-controlling element (e.g. fuel-injection pump) in connected to a sp... | 07/24/1984 |
| 4361788 | Dual-motor drive circuit with high current switching An electrically operated dual motor drive system of the type having differentially variable left and right traction motor circuits (10,12) including left and right variable duty cycle power switches (20,22) connecting the motors (14,16) independently to a... | 11/30/1982 |
| 4357729 | Vacuum cleaner control A vacuum cleaner structure having a control for reducing the total current delivery to the vacuum cleaner as when both a suction motor thereof and a brush motor thereof are being operated concurrently. The control includes an "On-Off" switch mounted on a ... | 11/09/1982 |
| 4301397 | DC Antenna rotator system Rotary positioning of an antenna is provided from a remote control apparatus using a first reversible motor at the antenna and a second reversible motor at the control. A rotary switch at the control is coupled mechanically and electrically to the control... | 11/17/1981 |
| 4086903 | Tennis ball throwing machine A tennis ball throwing machine for use in the practice of tennis having the capability of controllably delivering tennis balls to a player's forehand and backhand at various speeds and with various spins simulating conditions commonly encountered in game ... | 05/02/1978 |
| 4056759 | Driving system for moving paths or escalators A driving system for moving paths or escalators which use an endles chain adapted to be circulated between a path for transporting passengers, comprising a first and a second sprocket disposed at one end portion and substantially middle portion of the pat... | 11/01/1977 |
