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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 7944162 | Motor control device A motor control device includes a sensing circuit, a phase-shifting circuit, a comparing circuit and a control circuit. The sensing circuit senses the motor to generate a sensing signal. The phase-shifting circuit is electrically connected to the sensing circuit and... | 05/17/2011 |
| 7728541 | Electric motor drive control method and apparatus An electric motor drive control method includes deriving a target current from a target torque to apply electric current corresponding to the target current to an electric motor. When a rotation speed of the motor is in a predetermined speed region, including a zero... | 06/01/2010 |
| 7615953 | Apparatus and process for controlling and adjusting the operating of electric motor actuated devices Controlling and adjusting of the operation of a device actuated by an electric motor are carried out by shutting down the electric power supply of said electric motor at a plurality of time intervals during the motor operation, measuring in the time interval the vol... | 11/10/2009 |
| 7508150 | Electric motor controller The rotational speed of a motor is detected, and stored in a rotational speed memory. The difference between the present rotational speed output and each of plural past rotational speeds stored in the rotational speed memory is calculated in a plural difference calc... | 03/24/2009 |
| 7355359 | Universal apparatus for driving diverse fans A universal driving apparatus of a computer system, including a receptacle, a power switch, an integrator and a comparator, is provided to identify and drive a first fan and a second fan. The receptacle connects to the first fan or the second fan for electricity sup... | 04/08/2008 |
| 7342376 | Glass machinery motor control A machine for operating on a glass bottle. A carriage is displaceable by a servo motor having three lead lines. The rotation of the servo motor is stopped when power has been removed by shorting regenerative resistors to the three motor leads. The stopped servo moto... | 03/11/2008 |
| 7307395 | Safety device for a sliding panel driven by an electrical motor and method for implementing such a device The invention concerns a sequential safety system associated with a moving closing panel driven so as to slide by an electric motor (6), this safety system including means (20) exploiting the signal originating from an optical fiber to stop and reverse... | 12/11/2007 |
| 7187853 | Speed control of a d.c. motor The invention relates to a circuit and a method for the speed control of a d.c. motor, particularly the speed control of a fan driven by this d.c. motor, which is used as part of an air distribution system in passenger and commercial motor vehicles. The circuit for ... | 03/06/2007 |
| 7157877 | Brushless motor driving device A brushless motor driving device having a current detecting unit for detecting a phase-current of a brushless motor, a voltage detecting unit for detecting a phase voltage of the brushless motor, and a signal input portion to which the detection value of the phase-c... | 01/02/2007 |
| 7145299 | Power window control system A master controller installed in a master controller box and slave controllers installed in car doors to open and close window glasses of a car are connected by a single wire to each of slave controllers for enabling to send control signals through such a single wir... | 12/05/2006 |
| 7042229 | System and method for on line monitoring of insulation condition for DC machines Insulation condition monitoring systems and methods for a rotating DC electric machine, the method comprising: measuring a first set of values for an instantaneous differential current and an instantaneous voltage during operation of the rotating DC electric machine... | 05/09/2006 |
| 7002316 | Vehicle HVAC door with enclosed motor A drive for a vehicle HVAC vent door includes a drive transmission mounted within the shaft for the vent door. The drive transmission is of the sort commonly known as a wave drive transmission, wherein a lobed member is driven by an oblong drive shaft. The lobed mem... | 02/21/2006 |
| 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 |
| 6812655 | Induction actuated container An induction actuated container includes a container body, a container cover, a drive and an induction element. The drive includes a driven operating member and a driving member. The induction elements includes a sensor and an actuating controller for the driving me... | 11/02/2004 |
| 6777894 | Windscreen wiper system A wiper device for a window, in particular in a motor vehicle, including a wiper blade, a mechanical system that drives the wiper blade, and a control device that compensates for the clearances of the mechanical system as a function of load changes and/or as a funct... | 08/17/2004 |
| 6696813 | Open-loop synchronizer for a slide out room An open-loop system for synchronizing movement of a slide out room includes a pair of motors connected to extendable members which support the room during movement between an extended and a retracted position for driving the extendable members, a controll... | 02/24/2004 |
| 6580242 | Entrapment detection device of opening/closing member An entrapment detection device of an opening/closing member which efficiently performs an entrapment determination and restrains an entrapment load even when a motor rotational signal is not inputted. The entrapment detection device includes a controller ... | 06/17/2003 |
| 6528961 | Movable barrier operator having force and position learning capability A movable barrier operator includes a wall control switch module having a learn switch thereon. The switch module is connectable to a control unit positioned in a head of a garage movable barrier operator. The head unit also contains an electric motor whi... | 03/04/2003 |
| 6388410 | Apparatus and method for monitoring a closed-off interior space of a motor vehicle An apparatus invention relates to an apparatus and method for monitoring an interior space which is closed off by a locked and/or manually non-unlockable door, flap, sliding sunroof or the like, for example a passenger compartment or luggage compartment o... | 05/14/2002 |
| 6337549 | Capacitive anti finger trap proximity sensor The present invention relates to a trapping protector capable of detecting the presence of an object in a sensing region when connected with a device for creating input signals and evaluating output signals. Said trapping protector comprises a body portio... | 01/08/2002 |
| 6335602 | Squeeze protection system A squeeze protection system for movable parts of a vehicle, includes an operating switch for one or several parts to be moved, one or several actuators assigned to the operating switch, a control device for the actuator or the actuators which receives a s... | 01/01/2002 |
| 6160370 | Safety device for automobile power window system A pair of capacitors are provided at a window sash or a window glass edge. Each capacitor is connected to two variable phase delay generators in parallel. Selectors are inserted between the capacitors and variable phase delay generators. Each selector alt... | 12/12/2000 |
| 6107776 | Inverter control device The invention includes: a random number generating unit which outputs a random number in driving of an AC motor by a voltage source inverter, a maximum/minimum triangular wave frequency setting unit which calculates a maximum triangular wave frequency and... | 08/22/2000 |
| 6100657 | Electric motor drive An electric motor drive for an automotive operating element for moving between at least two end positions. A range about at least one selected position of the operating element is established. The drive automatically moves the operating element into the s... | 08/08/2000 |
| 6069466 | Method for driving opening/closing member In an opening/closing member driving method in which the rotation of a motor rotatable in two directions is transmitted through a transmission member to an opening/closing member to thereby drive a baffle 4 in an opening direction A and in a closing direc... | 05/30/2000 |
| 5998947 | Method capable of surely chucking a FD inserted in a high-density type FDD In a method of starting rotation of a magnetic disk medium of a large-capacity flexible disk by a spindle motor for use in a high-density type flexible disk drive for carrying out data recording and reproducing operation to and from the magnetic disk medi... | 12/07/1999 |
| 5982126 | Power closure panel control apparatus A power closure panel control apparatus is independent of closure panel configuration and capable of a diverse range of remote and direct activation. Sophisticated safety features utilize an adaptive strategy to facilitate highly sensitive obstruction det... | 11/09/1999 |
| 5883481 | Control system for electric vehicle A control system for an electric vehicle includes an accelerator opening detecting device for detecting a position of an accelerator, and an output command value calculating device connected to the accelerator opening detecting device for calculating an o... | 03/16/1999 |
| 5880566 | Absolute angular position calculation apparatus for a rotating motor and velocity control apparatus adopting the same An absolute angular position calculator for a rotating motor and a velocity control apparatus adopting the same, in which a separate pulse generator is not used. The motor is manufactured so that a modified frequency generator generates a modified frequen... | 03/09/1999 |
| 5612601 | Method for assessing motor insulation on operating motors A method for monitoring the condition of electrical-motor-driven devices. The method is achieved by monitoring electrical variables associated with the functioning of an operating motor, applying these electrical variables to a three phase equivalent circ... | 03/18/1997 |
| 5461294 | Method of detecting the stop of a refrigerator damper, and device for practicing the method A device for detecting the stop of a stepping-motor-operated damper for a refrigerator, the damper having a stepping motor, a baffle driven by the stepping motor, a rotation control unit for controlling the direction of rotation and the amount of rotation... | 10/24/1995 |
| 5177419 | Apparatus for controlling a load lifting element of a vehicle in response to the wearing of a motor brush An apparatus for controlling a load lifting implement of a work vehicle in response to the condition of a motor brush is provided. The vehicle has a frame and the load lifting implement is connected to the frame and elevationally moveable relative to the ... | 01/05/1993 |
| 5084659 | Method of operation of air cleaner A concentration of a given gas is detected by a gas sensor when a command signal for turning off the gas sensor is present, the concentration is stored and the gas sensor is turned off. The invention detects the concentration of the given gas by the gas s... | 01/28/1992 |
| 4644236 | Drive restart control for ring spinning or twisting machine A device for controlling the output speed of a motor of a ring spinning machine, a ring twisting machine and the like in case of replacing travelers of such machines includes a speed setter for the motor and a potentiometer which is operatively connected ... | 02/17/1987 |
| 4588934 | Automobile fan control with non-periodic fluctuation signal generator An automobile fan controller comprises: a fluctuation signal generator for generating a fluctuation signal; a pulse-width-modulation circuit including a triangle generator for generating a triangle-waveform signal having a constant amplitude and a constan... | 05/13/1986 |
| 4413213 | Electronic motor protection for variable speed motors A motor protection circuit which generates a signal having a value proportional to the magnitude of the input current of the motor and a motor speed signal having a value proportional to the difference between the rated motor speed and the actual motor sp... | 11/01/1983 |
| 4284931 | Overspeed shutdown system for centrifuge apparatus In an overspeed protection system for a centrifuge apparatus of the type including a rotor driven by a drive motor, a transducer for providing a signal whose frequency is a function of the rotational speed of the centrifuge rotor, an oscillator for genera... | 08/18/1981 |
| 4251759 | Relative motion monitor A monitor for detecting the relative velocity between a moving body or surface and a fixed body or surface includes a sensor having an actuator member, such as a wheel having magnetic pole pieces embedded therein and mounted for rotation proportional to t... | 02/17/1981 |
| 4076999 | Circuit for limiting the spindle speed of a machine An apparatus for insuring that the rotational speed of a spindle on a machine is prevented from exceeding a selected programmed speed. The apparatus is comprised of means for continuously receiving pulsed signals indicative of the instantaneous rotational... | 02/28/1978 |
| 4054819 | Motor angular velocity monitor circuit A circuit for controlling the operation of a bi-directional motor. A motor energized to run in one direction is stopped by applying a reverse or braking current to its energizing field. When the motor is virtually stopped, means are provided to de-energiz... | 10/18/1977 |
