Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 7202580 | Permanent magnet type motor and x-ray computed tomography apparatus A permanent magnet type motor comprising a rotor main body rotatably supported with respect to a stationary member, a rotor which is provided on an outer periphery face of the rotor main body and which is arranged such that S poles and N poles of a plurality of perm... | 04/10/2007 |
| 7148638 | Method and apparatus for embedding motor error parameter data in a drive motor of a power driven wheelchair A drive motor assembly for a power driven wheelchair comprises: a stator housing for containing field coils of a stator of the motor assembly; at least one sensor disposed in the stator housing for sensing rotation of the motor; a memory storing motor error paramete... | 12/12/2006 |
| 7030589 | Driving systems of AC motor An AC motor control apparatus that is applicable to commonly used PM motors and capable of detecting the magnetic pole position with simple algorithm. The AC motor control apparatus comprises an inverter for applying arbitrary AC power to an AC motor and a controlle... | 04/18/2006 |
| 6989642 | Method and apparatus for embedding motor error parameter data in a drive motor of a power driven wheelchair A drive motor assembly for a power driven wheelchair comprises: a stator housing for containing field coils of a stator of the motor assembly; at least one sensor disposed in the stator housing for sensing rotation of the motor; a memory storing motor error paramete... | 01/24/2006 |
| 6856113 | Central vacuum cleaning system motor control circuit mounting post, mounting configuration, and mounting methods A central vacuum cleaning system has a motor in a motor housing in a canister with a receptacle. In the motor housing is a motor control circuit with a printed circuit board. The motor control circuit is mounted to the motor housing using a mounting post having a li... | 02/15/2005 |
| 6713981 | Pole position detector for motor A pole position detector correctly detects a pole position of a permanent magnet motor. Each magnetic sensor (27) provides an electric signal in response to leakage flux from a magnet rotor (17). A computation unit (2) detects a change in the ou... | 03/30/2004 |
| 6184640 | DC brushless motor, magnetic bearing device and turbomolecular pump device A turbomolecular pump device having a DC brushless motor provided with a simplified rpm detection mechanism is provided. A pickup coil for detecting a magnetic flux produced by a permanent magnet of the DC brushless motor is built in the motor. Namely, a ... | 02/06/2001 |
| 6054836 | Electric motor starter for starting motors rotating at synchronous speed The present invention relates to an electric motor starter for starting motors rotating at synchronous speed. The starter comprises a programmable logic circuit having input ports for receiving control commands intended for the electric motor and supervis... | 04/25/2000 |
| 5967918 | Regulating system for a continuously variable transmission (CVT) For a CVT (3) a regulating system is proposed in which a corrector is located upstream of the control path. The disturbances and non-linearities in the control path (28) are taken into account in the corrector, via a mathematical model, so that the regula... | 10/19/1999 |
| 5432421 | Process for detecting the position, direction of movement and dynamic characteristic values of remote-controlled displacement of an adjustable object The invention relates to a process for detecting the position and direction of movement and for detecting the dynamic characteristic values of remote-controlled displacements of an adjustable object. According to the invention a signal is detected and eva... | 07/11/1995 |
| 4935679 | Electro mechanical interface for automating analytical instruments A planar bracket for demountably affixing an incrementally controlled motor for a manually settable x-ray difractometer. A gear pully and driver are operably interconnected to rotate the instrument axis. Two interrupters are utilized to sense an occurrenc... | 06/19/1990 |
| 4896085 | Impulse actuator system A silent, high torque, impulse actuator system for low average power devices. The system incorporates a typical small three pole D.C. motor which has been modified to allow quick electrical conversion, with unipolar switching circuitry, from conventional ... | 01/23/1990 |
| 4843286 | Vehicle window wiper with three brush motor and speed limiting A wiper apparatus using a three brush, permanent magnet motor in which a zener diode has a cathode connected to the low speed brush and an anode connected to the high speed brush. The zener breakdown voltage of the zener diode is chosen so that it reverse... | 06/27/1989 |
| 4827199 | Torque responsive motor-drive assembly A traverse rod having a reversible torque responsive motor-drive assembly for operating the traverse rod. The motor-drive assembly includes a stationary casing fixed to the rod and a movable casing mounted in the stationary casing for angular movement rel... | 05/02/1989 |
| 4760318 | Intermittent single rotation motor actuator A conventional three pole D.C. motor has a third placed at an acute angle of 60 degrees to one of the normal brushes and positioned to contact the commutator plates. A motor energizing circuit is normally off and is capable of energizing the normal brush ... | 07/26/1988 |
| 4582155 | Power steering apparatus A vehicle power steering apparatus for rotating a motor in response to a torque signal generated in response to a rotational torque of input and output steering shafts and for driving a steering direction control unit using a rotational force of said moto... | 04/15/1986 |
| 4580649 | Power steering apparatus A vehicle power steering apparatus for performing power steering by rotating a motor in accordance with a steering torque acting on input and output steering shafts and driving a steering direction control unit to perform power steering, comprises a senso... | 04/08/1986 |
| 4494059 | Structure for and method of surface conditioning sensing and indicating and motor speed control The condition of a surface is sensed by cyclically moving two members having engaged surfaces relative to each other, driving the surfaces for only a portion of each cycle to set up a threshold kinetic energy level in accordance with the friction between ... | 01/15/1985 |
| 4454460 | D.C. Rotary machine with interpole compensation The first and second interpole compensation windings are disposed on the commutation starting side and the commutation ending side of the interpole cores, respectively. The current flowing through the first and second interpole compensation windings are c... | 06/12/1984 |
| 4423359 | Electric motor An electric motor for a magnetic tape recorder comprises an electrically insulating disk-shaped stator with a plurality of flatwise coils, a rotary shaft rotatably extending through the stator, and a first disk-shaped rotor of soft iron with a multi-pole ... | 12/27/1983 |
| 4095155 | Direction reversing direct current motors and their control A direct current motor which includes a stator for producing a fixed magnetic field and a plurality of armature windings. The motor is caused to rotate by applying current to each winding only while that winding is passing through a zone in a given orient... | 06/13/1978 |
