Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
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| Number | Title | Issue Date |
| 7408317 | Apparatus having a motor, controller for the motor, and method of controlling the motor A method, and a system of using the method, of controlling a motor having a rated capacity. The method includes determining the motor has been started, determining a plurality of operating parameters of the motor after the motor has started, determining a threshold ... | 08/05/2008 |
| 7362071 | Rotation control device, rotation control method and construction machine In an electric rotary excavator (construction machine) 1, when earth pressure acts on a rotary body 4 in an opposite direction to an instructed direction of a lever, a control-system changing means 150 of a rotation control device 100 inc... | 04/22/2008 |
| 7248005 | Dual motor arrangement and control method A dual motor arrangement includes a first motor M1, a first MOSFET Q1 constructed and arranged to control operation of the first motor, a second motor M2, a second MOSFET Q2 constructed and arranged to control operation of the second moto... | 07/24/2007 |
| 7233120 | Optimal fan presence detection Detecting the presence of an electric fan is described. A current sink circuit is coupled to a pulse width drive output of a fan control circuit. A logic state in a logic input buffer is defined based on current flow through the current sink. The logic state indicat... | 06/19/2007 |
| 7203586 | Controller for contact mechanism A controller for a contact mechanism for preventing a lack of a pressing force applied from a contacting member to a contacted member when determining a control input to an actuator moving the contacting member by a position control. The controller sets a target pos... | 04/10/2007 |
| 7038408 | Fan motor speed control circuit A fan motor speed control circuit includes a driving circuit, a voltage division circuit, and a speed modulator. The voltage division circuit has a first transistor and a plurality of resistors and is connected between a voltage source and the driving circuit. The s... | 05/02/2006 |
| 6992453 | Actuator control system An actuator control system restrains hindrance to an object under control by an interfering substance that exists on its traveling path when the object is moved toward a target position on one axis while the object has been positioned at a target position on the oth... | 01/31/2006 |
| 6922025 | Zero ripple linear motor system The present invention relates systems and methods for compensating for errors associated with a linear motion system. The systems and methods determines one or more errors associated with the linear motion system and adjusts or corrects an input drive signal associa... | 07/26/2005 |
| 6836092 | Methods and circuits for detecting operational information of DC Fans Methods and circuits detect operational information about DC fans powered by pulse width modulation, such as detecting fan presence in a device and/or detecting rotational speed. Output pulses produced by the fan related to the rotational speed are utilized to produ... | 12/28/2004 |
| 6803736 | Control system which carries out the model-supported safety monitoring of an electronically regulated controller in the motor vehicle A system for controlling a regulator equipped with an electric servomotor in a motor vehicle. With reference to an example of an electronic steering system that has an electric-motor steering regulator, output parameters are generated by a model-assisted monitor for... | 10/12/2004 |
| 6664752 | Method and apparatus for correcting actuator positioning error A method of correcting positional error in an actuator that is equipped with a motor and a wave gear reduction drive that transmits a motor output to the target load. Positioning error relative to the absolute position of the actuator output shaft is meas... | 12/16/2003 |
| 6388417 | High stability dynamic force motor Motor control of a variable reluctance motor is obtained by providing a periodic voltage waveform to a coil of a motor. No coil current control or current or flux feedback is needed to obtain flux waveforms that allow for low-distortion or distortion-free... | 05/14/2002 |
| 5293322 | Industrial robot apparatus An industrial robot apparatus comprise for controlling an industrial robot and a peripheral unit thereof according to a program so as to load workpieces on a pallet, an abnormal stop unit for detecting an abnormality which occurs in at least either of the... | 03/08/1994 |
| 5239331 | Brake device for motor in camera A device for braking an electric motor as the drive source of an operating mechanism in camera by means of an electrical circuit is disclosed. This circuit includes a detector for levels of the rotation speed of the motor or of factors of influencing the ... | 08/24/1993 |
| 4611269 | Apparatus and method in which a plurality of detectors generating signals with different periods are used to detect the absolute position of a moving member An apparatus and a process for detecting an absolute positional value relating to mechanical movement of a member to be measured from a reference point. The apparatus includes a detecting means with a plurality of detectors having periods which are differ... | 09/09/1986 |
| 4373150 | Motor control system A motor control system including sequencing circuitry for governing the mode of operation of an electric motor in accordance with feedback signals representing selected motor operating parameters further includes modifying circuitry to selectively effect ... | 02/08/1983 |
| 4059745 | Override process control system An override process control system for regulating a process with a single final control element, such as a valve, from two or more process variables that are interdependent and must not exceed acceptable minimum and maximum limits. The system includes a l... | 11/22/1977 |
