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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 8089229 | Motor driving system and method A motor driving system includes a storage unit, a driver, and a controller. The driver includes a first programmable logic device (PLD). The controller includes a second PLD. The storage unit stores a control program. The controller generates a first transmission da... | 01/03/2012 |
| 8049443 | Line voltage interface for automation systems An integrated printed circuit board-based solid state line voltage interface for use in automation control system applications. Relays connect various functional loads to the line level source in response to input from a controller unit. Switches enable a user to ov... | 11/01/2011 |
| 7477027 | Method of removing foreign particles from heat transfer surfaces of heat sinks An apparatus is provided and includes a power source, a system board on which an electrical component is installed, a heat sink including a plurality of heat transfer surfaces to contact the electrical component and to thereby remove heat from the electrical compone... | 01/13/2009 |
| 7425805 | Three-in-one control device for a ceiling fan A three-in-one control device for a ceiling fan includes a signal receiving module, which is able to receive segmented controlled signals, stepless controlled signals and wireless controlled signals respectively, for transmitting controlled signals to a micro comput... | 09/16/2008 |
| 7358695 | Method for controlling fan A method for controlling a fan is provided for adjusting the rotational speed of a fan. The method includes adjusting the rotational speed of the fan from a first mode value to a range of rotational speed variation, wherein the upper bound of the range of rotational... | 04/15/2008 |
| 7298107 | Barrier operator controller with user adjustable force setpoint A control unit for a moveable barrier, such as a garage door, includes a microcontroller connected to a motor speed detector, motor current sensor or a sensor for determining forces exerted on or by the barrier. A user interface includes user actuatable switches for... | 11/20/2007 |
| 7284857 | Apparatus and method for treating learning differences A method for treating a learning difference of an individual, comprises predicting an eclipsed area of a retina of an eye of the individual; providing a prism lens having dimensions selected for directing light to the eclipsed area; and positioning the prism lens ad... | 10/23/2007 |
| 7274866 | Power tool and method for controlling a power tool A power tool is disclosed comprising a controller for controlling at least one operating parameter, a motor for driving a tool, at least three switching elements which are coupled to the controller, and a speed sensor for monitoring the speed of the motor to generat... | 09/25/2007 |
| 7265516 | Linear electric motor controller and system for providing linear control The invention relates to a method of, and system for, linear speed control for an electric motor, in which a digital to analog converter means is used for converting an 8-bit digital signal to an analog voltage for setting voltage across a motor, a digital state mac... | 09/04/2007 |
| 7263117 | Dual control analog delay element and related delay method A delay line including analog delay elements each having a selectively adjusted coarse and fine delay portion is described. The coarse delay portion receives an input clock signal and generates a ramp signal having a slope based on a predetermined coarse delay setti... | 08/28/2007 |
| 7250737 | Motor control apparatus A motor control apparatus includes a detection device for detecting a rotation speed of a motor, a storing section for successively storing the rotation speed detected by the detection device, a calculation device for calculating a variation amount of the rotation s... | 07/31/2007 |
| 7245100 | 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... | 07/17/2007 |
| 7232219 | Viewing apparatus for simulating impairment The present invention provides a viewing apparatus for simulating visual impairment. In one embodiment, the apparatus includes a frame defining a viewing area and first and second lenses supported by the frame. The first lens is disposed in a first region of the vie... | 06/19/2007 |
| 7228105 | Field test chamber arrangement A measurement arrangement for accurate and repeatable measurement of transmission and reception characteristics of a communication device. The arrangement comprises an at least partly conductive box forming a substantially enclosed cavity, and arranged in the box a ... | 06/05/2007 |
| 7218069 | Door opening/closing device A first judging unit integrates an increase in a corrected current when the corrected current is in a predetermined increasing state and judges that a first condition is satisfied when an integrated increase exceeds a threshold. A second judging unit integrates a de... | 05/15/2007 |
| 7212897 | Vehicle door controlling apparatus In order to provide a vehicle door controlling apparatus, which even when the vehicle starts to move while doors of the vehicle are in closed operation, performs insertion detection accurately without reducing the sensitivity of insertion detection. In the present i... | 05/01/2007 |
| 7208907 | System and method of restarting a switched reluctance motor after a rapid cycling of power A system and method of restarting a switched reluctance motor after a cycling of power provided to the motor is provided that includes receiving at the motor a power-off signal followed by a power-on signal, determining a rotational speed of a rotor, and energizing ... | 04/24/2007 |
| 7122987 | Safety garage door A safety garage door apparatus includes a garage door, two tracks, a controller, a linking device and a detecting device. Two tracks are installed on two sides of the garage door, respectively. The controller includes a motor, a driving device connected to the motor... | 10/17/2006 |
| 7095195 | Motor and disk drive apparatus In a motor and a disk drive apparatus in accordance with the present invention, a position detecting part 30 comprises a detection signal switching circuit 39A, a noise elimination circuit 38 and a detection circuit 39B, and the detection... | 08/22/2006 |
| 7084598 | Driver of electric compressor A compressor driver for a compressor is provided, wherein at the start of the compressor, a phase of the current flowing in the motor is controlled to be ahead of an induction voltage, then the advancement of the phase is controlled to decrease. Under an unstable co... | 08/01/2006 |
| 7079964 | Method for determining the frequency of the current ripple in the armature current of a commutated DC motor A method for determining the frequency of current ripples contained in the armature current signal of a commutated direct current (DC) motor includes determining frequency spectral results of the current signal and of a motor electric operating parameter. The freque... | 07/18/2006 |
| 7065435 | Control system for controlling the climate of a vehicle A control system for controlling the climate of a vehicle includes a control element, a temperature sensor, a motor and a microprocessor. The microprocessor may receive a temperature signal indicative of the temperature at the control element and may receive at leas... | 06/20/2006 |
| 7046917 | Speed controlling device of a motorized cart for a person to ride on A device of a cart includes a control, a speed regulating potentiometer, a microprocessor, a digital-to-analogue converter, a motor controlling unit, and a switch; the control is angularly displaceable and near to handlebars of the cart; the potentiometer is connect... | 05/16/2006 |
| 7042187 | Control apparatus for electric actuator A driver for an electric actuator comprises a direction-switching means which switches a direction of rotation of a rotary driving source based on a direction instruction input signal, a current amplifier/limiter which converts a voltage outputted from the direction... | 05/09/2006 |
| 7038416 | Control system for a floor maintenance appliance A control system for controlling the work output delivered to a floor surface by a work tool associated with a floor maintenance machine, such as a burnisher, is provided. In one embodiment, a voltage regulator regulates the voltage provided to the motor assembly th... | 05/02/2006 |
| 7023154 | Train speed control using current and velocity sensing A method for speed control for a motor of a locomotive of a model electric train is presented. A method in accordance with the present invention includes sensing an operating velocity of the motor and the operating current provided to the motor, and then producing a... | 04/04/2006 |
| 6974044 | System and device for controlling a load lifting device The invention relates to a system for controlling a load lifting device (1) with a controllable drive (2) and a lifting element (5) which is linked with the drive (2) and which is—at least in a non-operational position due to the gravit... | 12/13/2005 |
| 6944896 | Line voltage compensation system for power chair An apparatus, method and program product position a powered examination chair at a constant, desired speed despite fluctuations line voltage. A power signal supplied to an actuating motor of the chair is apportioned according to the line voltage supplied to the chai... | 09/20/2005 |
| 6943515 | Controller of automotive power door An electric drive motor drives a door to move in an open/close direction. A pulse encoder outputs a series of pulses. Each pulse has a pulse duration sized to correspond to a rotation speed of the motor. The number of the pulses corresponds to the number of revoluti... | 09/13/2005 |
| 6940241 | Circuit using current limiting to reduce power consumption of actuator with DC brush motor A drive circuit including a motor for positioning a damper from a rest position to a stalled position and protect the drive mechanism from damage due to increased current to the drive motor when the damper stalls by including a current limiter to prevent the current... | 09/06/2005 |
| 6912353 | Brushless DC ring motor cooling system A method of operating a cooling fan in a cooling system for a vehicle includes determining a required speed of the cooling fan. First and second signals are provided to a motor controller operatively connected to a motor having a rotatable portion connected to the c... | 06/28/2005 |
| 6902446 | DC motor with integral controller A DC motor having a motor housing and a motor controller housed within the motor housing. In a preferred embodiment the heat producing components of the motor controller are in thermal communication with the housing such that the majority of the heat produced by suc... | 06/07/2005 |
| 6870333 | Method for operating asynchronous motors and corresponding device Asynchronous motors are controlled by way of two- or three-phase controllers that include at least two pair of thyristors connected in antiparallel and fired at certain intervals. According to the inventive method, a fundamental wave with the desired frequency is de... | 03/22/2005 |
| 6844691 | Ventilator having an abnormal operation indication device A ventilator having an abnormal operation indication device includes a power supply circuit, a central processing unit, a fan motor, and a load sensing circuit. Thus, the load sensing circuit detects the abnormal operation signals through the sensor, so that the abn... | 01/18/2005 |
| 6825623 | Opening and closing control device of opening and closing member for a vehicle An opening and closing control device of opening and closing member for a vehicle includes a motor for actuating the opening and closing member, and a control unit for driving the motor so as to become a predetermined target speed and for driving the motor in revers... | 11/30/2004 |
| 6731082 | DC motor constant speed PWM control A pulse width modulated (PWM) output signal controller circuit is provided for controlling operation of an electronically commutated, direct current (DC) motor. This DC motor may be used for operating cooling fans in sensitive electronic equipment. The controller ci... | 05/04/2004 |
| 6710560 | Movable barrier operator A movable barrier operator having improved safety and energy efficiency features automatically detects line voltage frequency and uses that information to set a worklight shut-off time. The operator automatically detects the type of door (single panel or segmented) ... | 03/23/2004 |
| 6696806 | Method and apparatus for facilitating control of a movable barrier operator A movable barrier operator (11) receives movement sensing signals from a sensor (13) and calculates corresponding speed of movement of a movable barrier. Such speed measurements lead to development of a median speed value over a monitoring window. The med... | 02/24/2004 |
| 6646399 | Controller for shutting apparatus A controller for a shutter moved between an opened position and a closed position. A plurality of location ranges is defined between the opened position and the closed position. The controller detects the current moving speed of the shutter in each range,... | 11/11/2003 |
| 6609821 | Blender base with food processor capabilities A blender base that may be used with a food processor container, a blender container, and a single use beverage container. The blender container includes a novel blade unit having a food processor-style blade and blender type blades. Programs with preprog... | 08/26/2003 |
