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7446492 |
Fan system and stopping method for motor thereof
A fan system and a stopping method for the fan system are provided. The fan system is electrically connected to a power supply and receives the power therefrom. The fan system includes an energy...
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7372226 |
Method for switching off a power tool
In a method for shutting off a drive motor ( 12 ) of a power tool that drives a tool, the drive motor ( 12 ) is shut off as a function of a variable threshold value (E 1 ) if the tool jams. The...
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7301295 |
Stabilizer control device
A stabilizer control device includes a stabilizer having torsion bars and a brushless motor having an exciting coil, a rotating direction switching device switching a rotating direction of the...
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6979976 |
Driving apparatus for driving a brushless motor
A driving system for driving a brushless motor effects a rotation control of a rotor by sequentially switching application of a current to magnetic coils disposed in a stator in response to a...
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6943510 |
Excitation circuit and control method for flux switching motor
An excitation circuit for a flux switching motor. The circuit includes a low-value film capacitor across the DC side of a bridge rectifier. A plurality of electronic switches are arranged in an...
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6822408 |
Method of securing a machine element and/or a load connected to the machine element in a fixed position
In a method of holding a machine element, whose position is directly or indirectly controlled by an electromotive drive in the absence of a self-locking mechanism, the drive is halted and a brake...
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6563287 |
Method of controlling three phase motor starting sequence
A motor starter. The motor starter comprises a motor; start, run, shorting and transition contactors operably associated with the motor; and run, start, shorting and transition auxiliary...
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6337553 |
Circuit arrangement and method for operating and electrical motor
A circuit arrangement with a digital controller for operating an electric motor and a method for starting an electric motor are disclosed. Electric motors require a considerably higher current...
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6182723 |
Switchable router brake system
Improvements made to a router a relate to a switchable router brake system. The switchable brake system permits a motor brake to be selectably engaged to operate when the router motor is turned...
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6114820 |
Power window apparatus having safety unit
A power window apparatus is provided for detecting pinching in accordance with the opened/closed position of the window and a state of rotation of a motor, the apparatus having a position sensor...
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6047534 |
Stopping and restarting device in independent driven spindle in spinning machine
Regarding an independently driven type spindle in a spinning machine, when a yarn breakage is occurred in a spindle 10, a brake operating member 35 of the spindle 10 is moved toward a spindle shaft...
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5198734 |
Method and means for stopping backspinning motor
A method for stopping the backspinning of a submersible pump motor prior to restarting the motor. A control circuit is provided which rectifies A.C. control voltage and applies the resulting D.C....
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5142210 |
Abnormal state detecting apparatus of a machine tool
An abnormal state detecting apparatus of a machine tool having a servomotor. The apparatus is provided with a device for detecting an abnormal acceleration and an abnormal torque of the servomotor...
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5091680 |
Motor brake circuit for magnetic disk drive system
A device for braking a rotating magnetic disk in a magnetic storage system senses a back EMF generated by a drive spindle motor. By electrically shorting the coils in the drive spindle motor the...
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4922168 |
Universal door safety system
A safety system is disclosed for universal attachment to existing garage door openers. A transmitter of infrared energy transmits a beam laterally of the door opening to detect any obstruction to...
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4749923 |
Electric sewing machine motor control device
A motor control device provided on an electric sewing machine comprising a brushless permanent-magnet motor and in combination with a magnetic pole sensor, rotational-speed and rotational-speed...
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4659970 |
Vehicle docking apparatus and method
Automatic guided vehicles are commonly used in industrial material handling operations. Such vehicles must be accurately docked at predetermined stop locations without the guidance or assistance of...
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4587467 |
System for orienting a rotating member
A system for orienting a rotating member includes a slow down and a stop sensor. A logic circuit receives inputs from the sensors to slow and stop the rotating member. A slow down signal must be...
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4458185 |
Propulsion control apparatus for passenger vehicles
A cam controller for determining the operation of an electric motor is coupled with a stepping motor to provide predetermined positional movements of the cam controller in response to a desired...
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4341455 |
Conducting toner transfer apparatus
Novel apparatus for transferring magnetic and conducting toner from a dielectric surface to plain paper by interposing a dielectric belt mechanism between the dielectric surface of an imaging drum...
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4267914 |
Anti-kickback power tool control
An impending kickback condition is the operation of a power tool or machine tool system is sensed and used to control or eliminate the kickback. The ability to sense an impending kickback condition...
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4249117 |
Anti-kickback power tool control
An impending kickback condition in the operation of a power tool or machine tool system is sensed and used to control or eliminate the kickback. The ability to sense an impending kickback condition...
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3582739 |
SYNCHRONIZER FOR PRESETTING THE STOP POSITION OF A ROTARY SHAFT
A contact-free synchronizer for presetting two distinct, independently adjustable stopping positions of the work shaft of an electric drive with electromagnetic brake. The stop pulses are obtained...
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3571683 |
SERVOMECHANISM WITH DRIVING ROTOR WINDING AND BRAKING ROTOR WINDING
A commutator-type electric motor with two windings, one of which is energized by a control current, for driving the motor, and the other of which furnishes a braking torque, whereby the motor is...
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3508133 |
METHOD AND APPARATUS FOR CONTROLLING THE OVERRUN OF ROTARY MEMBER
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3497790 |
WINDSCREEN WIPER CONTROL CIRCUITS
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3423661 |
TORQUE RESPONSIVE OVERLOAD ACTUATOR TO STOP DRIVE AND BRAKE
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3344330 |
Chart indexing system having deceleration and braking
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3319143 |
Control unit for windshield wiper
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3309589 |
Electrical device for precisely positioning a remote component
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3293525 |
Operating apparatus for taximeter
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3292070 |
Electric motor protector circuit
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3283360 |
Tenderizing meat machines
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3253206 |
Windshield wiper actuating mechanism
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3243676 |
Motor driven automatic stepping drive for a rotatable shaft, including means for positively locking the shaft in a selected position and dynamic braking for the motor
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3241022 |
Electric motor controls
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3225281 |
Automatic positioning apparatus for cutting torches
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3216351 |
Apparatus for controlling the rotary motion of a printing roller
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3187246 |
Protective relay circuitry for hoist motor controls
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3185911 |
Control circuit for tape drive mechanism
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3170424 |
Positional control systems
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3163811 |
Machine tool
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3024557 |
Automatically controlled heat transfer imprinter
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2991665 |
Motor driven speed reducer
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2967411 |
Electrical control circuit for knitting machines
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2908907 |
Apparatus for counting red blood corpuscles in blood
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2892519 |
Control system for flywheel equipped machines
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2876407 |
Arrangements for stopping electrically operated sewing or other machines
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2870392 |
Electric controllers for machines
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2869061 |
Motor control system
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