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The ice cream cone was invented at the St. Louis Worlds Fair by Ernest Hamwi in 1904. His waffle booth was next to an ice cream vendor who ran short of dishes. Hamwi rolled a waffle to hold ice cream and the cone was born.
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| Number | Title | Issue Date |
| 7323842 | Rotating electrical machine A rotating electrical machine has a housing with a shaft mounted rotatably in it. A rotor is fixed to the shaft and has a plurality of magnetic poles. A stator is positioned about the rotor and has a winding. A switch is mounted within the housing and has a first po... | 01/29/2008 |
| 7215093 | Motor drive circuit and motor drive method that can positively perform a brake operation A motor drive circuit includes a first transistor. The collector of a second transistor is connected to the emitter of the first transistor in series. A motor is connected to a connection point between the first and second transistors. A first brake control circuit ... | 05/08/2007 |
| 7203555 | Predictive regulatory controller Methods and apparatus for adjusting control signal values for use in controlling a plant to conform a system parameter to a set-point are disclosed. To adjust control signal values, a reference trajectory for the set-point is generated based on a set-point tracking ... | 04/10/2007 |
| 7129669 | Motor controller, semiconductor integrated circuit, indicating instrument and method for controlling a motor A motor controller comprising, a detector configured to perform a difference processing for information relating to a counter electromotive force and an induced electromotive force generated by a stepping motor, and to generate a driving control signal based on a re... | 10/31/2006 |
| 7109679 | Damping for electromechanical actuators Oscillation and other disturbance damping is provided for a system having a load driven by an electric motor, e.g., an electromagnetic actuator. Damping is achieved using feedback in an active mode, where power is supplied in a normal operation mode of the electroma... | 09/19/2006 |
| 7075264 | Instantaneous power floating frame controller The present invention relates to a method of controlling a power converter (20) of a synchronous machine system (10), the method comprising sampling phase-current values between the power converter (20) and the synchronous machine (30); s... | 07/11/2006 |
| 5838124 | Systems and methods for braking of actuator and brushless DC motor therein A brushless DC motor is controlled by determining a speed of the motor and a line voltage supplying drivers of the motor. Based upon these determined values and predetermined motor performance data, a maximum PWM on-time is determined for drive signals su... | 11/17/1998 |
| 4937509 | Electronic braking circuit for rotating AC electrical motors An electronic braking circuit, for use with normal motor energizing circuits, to achieve rapid and controlled stopping of rotating AC motors after removing the driving power. The braking circuit comprises a transformer having a relatively high voltage-low... | 06/26/1990 |
| 4730151 | Continuous field control of series wound motors A method for operating an electronic control system for an operator controlled, electrically driven vehicle. The vehicle being powered by a direct current electric traction motor. The electronic control system includes a power source, a variable mark-spac... | 03/08/1988 |
| 4609853 | Cast bell motor drive system and method A motor drive system and method for driving a cast bell or similar object, comprising a motor and cam switches driven by the motor which operate relays in accordance with a duration angle and a start angle respectively, the circuit of the drive system sup... | 09/02/1986 |
| 4443744 | Method and apparatus for charge enhancement of a commutating capacitor For protection against commutation failures in a motor control circuit, there is provided a method and apparatus by which the charge on a commutating capacitor is made to track the armature current of a separately excited motor regardless of the operating... | 04/17/1984 |
| 4354147 | Drive and control arrangement for a mechanical eccentric press A drive and control arrangement for a mechanical eccentric press is disclosed. The arrangement includes a direct current electric motor connected to a reduction gear mechanism. An output shaft of the reduction gear mechanism is coupled to an eccentric suc... | 10/12/1982 |
| 4284930 | Motor control apparatus and method A direct current motor controlling apparatus determines the operational speed of one or more direct current motors such as traction motors propelling a passenger vehicle along a track. The speed of the motor is established by changing the on and off condu... | 08/18/1981 |
| 4132934 | Electric motor driven vehicles A control arrangement is described for dynamically braking a vehicle driven by an electric motor having a single field winding. The control arrangement comprises means for controlling the supply of power to the motor, a permanent magnet generator for mech... | 01/02/1979 |
