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System for magnetically attaching templeless eyewear to a person
A system of eyewear that eliminates the need for hinges on the frames of the eyewear.
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| Number | Title | Issue Date |
| 7427842 | Series motor and method of controlling the same A circuit for a series motor for a power tool is disclosed, wherein reliable switching is achieved by means of two electronic switches, without the use of a mechanically disconnecting switch. To this end, two electronic switches, preferably triacs, are preferably co... | 09/23/2008 |
| 7355362 | Power supply with performance display A power supply with performance display is disclosed. The computer power supply mainly has a power converter, a control module, and a display. The control module receives and processes the operating signals from the power converter, and then sends those processed si... | 04/08/2008 |
| 7339334 | Real-time responsive motor control system The present invention discloses a real-time responsive motor control system comprising a central MCU (Microcontroller Unit) core logic and at least one PWM (Pulse Width Modulation) MCU core logic. The central MCU core logic takes care of all interrupt events. The PW... | 03/04/2008 |
| 7323839 | Direct current motor controlling method A direct current motor controlling method includes a mean for transforming a duty signal to computed value by a microprocessor unit. The microprocessor unit computes the computed value and then produces a target value by executing a dichotomy method, a rotation meth... | 01/29/2008 |
| 7288905 | Integrated circuit and method for trainable control and operation of DC motor A method and device for control of a low-cost DC motor such as that suitable for portable or battery-powered applications are disclosed such that an intended behavior for the motor may be programmed without reliance on external equipment or specific expertise. The i... | 10/30/2007 |
| 7276878 | Amperage control for protection of battery over current in power tools Amperage control of a power tool motor is provided by pulse width modulation of current from a power supply. The pulse width modulation may be varied according to the determined motor current and measured power supply voltage. The power supply may include a battery ... | 10/02/2007 |
| 7276875 | Multimode integrated modulation circuit for controlling fan rotating speed A multimode integrated modulation circuit for controlling the fan rotating speed mainly includes a voltage regulating circuit, an integrated modulation circuit and a fan motor driving circuit. The voltage regulating circuit is used to receive an external voltage sig... | 10/02/2007 |
| 7218073 | Fan motor speed control circuit A fan motor speed control circuit is disclosed. The circuit includes a digital/analog converting unit and a driving unit. The digital/analog converting unit takes charge of receiving a pulse width modulation (PWM) signal and converting it into a voltage signal. The ... | 05/15/2007 |
| 7193377 | System and method for controlling motor speed using a biased pulse width modulated drive signal A motor drive circuit includes a switching circuit having an input node that receives a drive signal and a control node that receives a control signal. The switching circuit couples the input node to an output node responsive to the control signal. A bias element re... | 03/20/2007 |
| 7180257 | Method of brake pulse rejection in commutation pulse detection circuits A system and method is provided for improved monitoring and controlling of mechanically commutated DC motors. The system and method include DC motors, pulse-count driver circuitry for driving the motors, motor position sensing circuitry, and motor control circuitry.... | 02/20/2007 |
| 7141949 | Low noise back EMF sensing brushless DC motor A low noise electronic three phase bridge controlled brushless DC motor suitable for whiteware appliance pumps and other appliance applications. Back EMF zero crossing sensing is used to determine rotor position and thus stator winding commutation times. Motor torqu... | 11/28/2006 |
| 7141953 | Methods and apparatus for optimal voltage and frequency control of thermally limited systems Methods, apparatus, and articles of manufacture control a device or system that has an operational limit related to the rate or frequency of operation. The frequency of operation is controlled at a variable rate calculated to maximize the system or apparatus perform... | 11/28/2006 |
| 7133601 | Amperage control for protection of battery over current in power tools Amperage control of a power tool motor is provided by pulse width modulation of current from a power supply. The pulse width modulation may be varied according to the determined motor current and measured power supply voltage. The power supply preferably includes a ... | 11/07/2006 |
| 7122982 | DC motor rotation information detecting device A rotation information detection device detects rotation information of a DC motor based on a surge component waveform superimposed on a voltage waveform between the terminals of the DC motor or a current waveform of the DC motor, a circuit is provided which supplie... | 10/17/2006 |
| 7116622 | Optical storage device rotation speed control apparatus and method A method for controlling the rotation speed of an optical storage device. In the first mode, a first signal is produced, and in the second mode, a second signal is produced. In one mode, a first pulse of a first voltage and a second pulse of a second voltage are sen... | 10/03/2006 |
| 7112934 | Electrical power tool having a motor control circuit for providing control over the torque output of the power tool A power tool such as an electric drill typically contains a gear train that couples the output spindle of the motor to the tool bit-receiving chuck. The control circuit for the power tool is operable in a ratcheting or pulse mode that causes the output spindle to ro... | 09/26/2006 |
| 7075258 | Power control device of an electric tool, a method of power control of an electric tool and an electric tool provided with a power control device A power control device of an electric tool has a control or regulating device for adjusting a power output to an electric motor of the electric tool by means of a pulse width modulation, and a frequency transmitter that varies a frequency of the pulse width modulati... | 07/11/2006 |
| 7064511 | Autofan combination of zones A system and method for controlling a fan is disclosed. A single control signal value for controlling the fan, such as a single PWM duty cycle value for a corresponding PWM generator output powering the fan, may be calculated by combining sensor data from two or mor... | 06/20/2006 |
| 7038418 | Numerical control apparatus The numerical control apparatus includes a numerical control part for outputting a move command, one motor control part for generating a PWM signal for a plurality of motors based on the move command from the numerical control part, and a plurality of motor amplfier... | 05/02/2006 |
| 6965208 | Motor speed detecting device for use between motor and system A motor speed detecting device for use between a motor and a system is provided. A motor speed detecting device for use between a motor and a system includes a first input terminal and a second input terminal, wherein the first and second input terminals are electri... | 11/15/2005 |
| 6949899 | Brushless DC motor having an AC power control device A brushless dc motor includes a conversion circuit and a dc motor drive circuit. The conversion circuit includes a rectifier unit, a pulse-wave-absorbing unit, a filter unit, a voltage-stabilizing control unit and a voltage-stabilizing unit. The rectifier unit, the ... | 09/27/2005 |
| 6933702 | Control method and system for motor The invention relates to a control method and a control system for a motor. The control method and the control system of the invention transfer the motor dynamic equations of the synchronous d-q frame into a motor parameter (for example, the leakage inductance) and ... | 08/23/2005 |
| 6819069 | Arrangement with an electric motor The rotation speed of an electric motor (9) is controlled by a controller (6) which receives its setpoint from a characteristic function (23). The characteristic function (23) calculates a setpoint for the controller (6) on the bas... | 11/16/2004 |
| 6819074 | Apparatus and method of controlling a driving speed of a motor An apparatus for controlling a driving speed of a motor comprises a motor controller provided in the motor controlling apparatus detecting the motor driving speed in response to pulses outputted from an encoder. The motor controller adjusts a detection period for th... | 11/16/2004 |
| 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 |
| 6646396 | Apparatus for motor synchronization A DC electric motor includes an internal programmable element that permits it to be synchronized to an external reference signal. To that end, the motor includes a rotor capable of rotating at a rotational speed, rotor circuitry that controls the rotation... | 11/11/2003 |
| 6586904 | Compensation for variable voltage A switched reluctance drive is supplied from a voltage source which varies from the voltage at which the control laws for the drive were determined. The control system compensates for this by modifying both the speed and torque values used to determine th... | 07/01/2003 |
| 6563285 | Stepper motor control system A method and system for controlling a stepper motor that may be used in a paper feed rolling arrangement of a printer. The method includes storing step mode selection data in combination with time data in a single table for retrieval and use by a controll... | 05/13/2003 |
| 6522094 | Motor overload coil control and method of calculating operating temperature A motor overload coil control is disclosed for use in a motor starter/relay contactor. The control includes an 8-bit, 8-pin microcontroller that together with an I/O reduction circuit, is capable of functioning 13 I/O's with only 5 I/O pins on the microco... | 02/18/2003 |
| 6518723 | H-bridge motor driving circuit An H-bridge motor driving circuit has, between a PWM comparator and a control circuit, first and second frequency dividers for frequency-dividing, by 2, an AND gate, OR gate, and first and second and second inverters. During a first period, the first and ... | 02/11/2003 |
| 6512341 | Apparatus and method for driving a brushless motor The invention provides an motor drive apparatus comprising a detector for detecting a terminal voltage in a non-energized phase and a detector for detecting a DC voltage applied to the main line of an inverter. The rotation of the brushless motor is contr... | 01/28/2003 |
| 6504337 | Motor modeling using harmonic ampere-turn saturation method A method and apparatus are provided for modeling an electric motor. The method includes the steps of interpolating a flux density for each angular position within an air gap of the electric motor from a predetermined air gap and tooth magnetization magnet... | 01/07/2003 |
| 6483265 | Methods and systems for minimizing vibration in electric machines Methods and apparatus for minimizing electrical machine vibration are described. In an exemplary embodiment of the method, power is applied to the motor under microprocessor control such that a pulse modulated current profile is applied to the motor which... | 11/19/2002 |
| 6445879 | Apparatus and method for braking a washing machine A method for braking a washing machine in accordance with the present invention comprising the steps of: setting up an initial data of a duty ratio corresponding to a detected speed and a rotating position; discharging a voltage of the capacitor filter du... | 09/03/2002 |
| 6369530 | Battery-powered wireless remote-control motorized window covering assembly having controller components A wireless battery-operated window covering assembly is disclosed. The window covering has a head rail in which all the components are housed. These include a battery pack, an interface module including an IR receiver and a manual switch, a processor boar... | 04/09/2002 |
| 6369472 | Device for acquiring operating parameters of an electric motor A device for acquiring operating parameters on electric motors with an arrangement that is influenced by an effect of at least one operating parameter of an electric motor. The arrangement is designed to store and display the effect. To obtain reliable in... | 04/09/2002 |
| 6356044 | Motor with programming module A motor having a rotor and stator for use with a power supply. A power switching circuit connected between the windings and the power supply selectively energizes windings of the stator to generate the magnetic field applied to the rotor to cause the roto... | 03/12/2002 |
| 6346789 | Motor step-less speed control with active feedback of phase detector An apparatus for and method of controlling the circulating fan of a gas appliance. The circulating fan is powered by an alternating current electric motor. An electronic circuit, powered by the heat of the gas appliance, determines the rotational speed of... | 02/12/2002 |
| 6310453 | Drive circuit for a speed adjustable fan A drive circuit for a speed adjustable fan comprises a computing IC, a Hall IC, an input terminal for external signals, and a current control circuit. The drive circuit is arranged inside the fan to control the speed of the fan without the need of an exte... | 10/30/2001 |
| 6307346 | Induction motor load limiting for power steering applications A power steering system and induction motor load compensation algorithm or processing method for use in a vehicle. The power steering system comprises a power supply, a power steering motor, a steering subsystem, and a power steering controller coupled to... | 10/23/2001 |
