Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 8125165 | Motorized screen configuration and grouped control methods, automatic controller for implementing this method and home automation installation comprising such an automatic controller An automatic control mechanism for a group of motorized screens in which each screen includes a load bar that is displaced according to a predefined travel and wherein the control mechanism determines a shift parameter between a first reference position of each scre... | 02/28/2012 |
| 7545108 | Robotically controlled display An electronic display configured to display visual information is mounted to a display mount. The display mount is movable in three-dimensions, whereby the associated display may be moved in three-dimensional space. In one embodiment, a unitary display comprises a p... | 06/09/2009 |
| 7358690 | Motor control apparatus In a motor control apparatus in which a higher voltage is directly applied to a driving unit for a motor from a battery and a lower voltage stepped down by a switching regulator from the battery is also supplied to a control unit, the switching regulator is started ... | 04/15/2008 |
| 7317290 | Tandem battery powered inverter and method of implementing the same AC inverters that are electrically connected to a direct current source to convert the direct current source such that the transistor power module of an inverter can power a plurality of AC motors wherein the motors can be located remote from the inverters or within... | 01/08/2008 |
| 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 |
| 7088068 | Sensorless motor driving apparatus and driving method addressing prevention of backward rotation The sensorless motor driving apparatus according to the invention may include: a timing generation circuit generating a timing signal at intervals T; a driving signal generation circuit receiving the timing signal and generating, at the intervals T, pulse signals, t... | 08/08/2006 |
| 6680589 | Relay contact monitoring device A device for monitoring the state of relay contacts is especially useful for controlling motor windings in air conditioning systems. When a first relay switch, which is operative to supply power to a first motor winding does not open as desired, a switch ... | 01/20/2004 |
| 6659250 | Electro-mechanical torque control-elimination of stopping noise A method of returning an electromechanical axial setting device, particularly suited for friction couplings. The axial setting device includes two setting rings centered on a common axis, one of which is axially held, with the other one being axially disp... | 12/09/2003 |
| 6509703 | Method and system for reduced voltage start-up of AC motors in multi-motor system A method and system that provides for simultaneous or independent start-up of two or more three-phase AC motors with reduced starting current. Two AC motors have their stator windings connected in series across the power network. If more than two AC motor... | 01/21/2003 |
| 6402260 | Vehicle anti-lock brake control system A rotational speed of an electric motor 12 is memorized at a memory unit 21 as a set rotational speed for allowing a minimum required volume of brake fluid to be discharged from the pumps in a state where the output hydraulic pressure of the master cylind... | 06/11/2002 |
| 6121735 | Actuator with start-stop operation The present invention relates to an electronically adjustable actuator for actuating a plurality of actuating elements, such as valves. A control unit is provided for generating actuating signals to cause each of the valves to move with one another in a s... | 09/19/2000 |
| 6013990 | Monitoring power supply voltage to hard disk drive A hard disk drive for supplying a power supply voltage by monitoring a power supply voltage and method of controlling the same. The hard disk drive includes a power supply monitor circuit for monitoring an initially supplied power supply voltage, and a co... | 01/11/2000 |
| 5789879 | Multiple pump hydraulic power system A multiple electric motor hydraulic oil pump power system including a programmable controller having electric motor starting and stopping circuitry for hydraulic oil flow control. The circuitry having means to compare each electric motor running hours and... | 08/04/1998 |
| 5650886 | Disk drive spindle motor start up using an additional motor winding upon startup failure A disk drive system for use in limited power applications is disclosed. The disk drive includes a spindle motor having two or more windings, along with a spindle motor driver which can drive the spindle motor in any of a unipolar, bipolar or tripolar mode... | 07/22/1997 |
| 5488274 | Method for controlling activation of disk drive motors In a method of controlling activation of a motor, based on a device number (unit address) set value Ad which is determined exclusively for a disk device and a motor activation start time delay Td which is designated by a host control... | 01/30/1996 |
| 5329216 | Multi-shaft driving apparatus and fluid rotary apparatus A multi-shaft driving apparatus includes a plurality of motors each for rotating one of a plurality of shafts to be synchronously rotated, an encoder, provided for each motor, for detecting a rotational state of the shafts, a pulse generator for generatin... | 07/12/1994 |
| 4929878 | Memory mirror control system for vehicles and the like A mirror control system for electrically powered and positioned mirrors (FIG. 1) of the "memory" type for, for example, moving an automotive side view mirror from its current position to a desired "memory" position, and a special algorithm therefor (FIG. ... | 05/29/1990 |
| 4713718 | Microprocessor based motor protective relay with maximum number of starts per time interval limiter A motor protection relay is provided which is programmable to limit the number of starts which are allowed in a given interval of time. In accordance with the algorithm associated with the relay microprocessor for controlling the starts per time, old star... | 12/15/1987 |
| 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 |
| 4617497 | Spinning or twisting machine control system An emergency battery power supply for a ring-spinning or ring-twisting frame can be brought into operation by an automatic circuit to bridge brief power failures and effect programmed shutdown of the motors upon longer power failures, with the speed ratio... | 10/14/1986 |
| 4556826 | Inching supply torque control In a drive system for a grinding mill the load torque plus frictional torque may increase considerably as a loaded mill is inched from its rest position and will suddenly decrease when the load tumbles or cascades. The applied torque or driving torque mus... | 12/03/1985 |
| 4453111 | Electric drive for submarines A direct current electric motor marine propulsion system is provided with a pair of shunt wound direct current electric motors which are alternatively connected in a series/parallel circuit configuration. A forward biased diode between the motors in the s... | 06/05/1984 |
| 4143813 | Air conditioning control and method of operation A control for a plurality of air conditioning units installed in separate rooms of a multi-room building, with each air conditioning unit having an on-off switch to selectively connect the air conditioning unit to a source of electrical power. The control... | 03/13/1979 |
