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A fork with timer for providing a cue to a user after an elapsed period of time for indicating that another bite of food using the fork may be taken.
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| Number | Title | Issue Date |
| 7154239 | Controller for a brushless direct current motor A controller includes a power source unit, a drive circuit, and a state control circuit. The drive circuit is coupled to the power source unit, and includes a drive coil and a switching transistor unit. The switching transistor unit is operable in one of a circuit-m... | 12/26/2006 |
| 5378952 | Machine drive system and method A drive system for washing machines, electric vehicles or the like has its winding switched to effect speed change and an asynchronous motor operated by a frequency converter where there are more than two grooves per pole and phase with respect to the mot... | 01/03/1995 |
| 4961042 | Device for controlling AC motor A device for controlling an AC motor for a fork lift truck comprises a detector to detect direction of rotation of an AC motor. The direction of rotation thus detected is compared with a desired direction of rotation of the AC motor, and the AC motor is c... | 10/02/1990 |
| 4548299 | AC elevator control system An AC elevator control system has a converter for converting a three-phase AC power to a direct current, an inverter for inverting the direct current to a three-phase AC power with a variable voltage at a variable frequency, and a three-phase induction mo... | 10/22/1985 |
| 4491197 | Speed control apparatus for A.C. elevator car drive motor An SCR bridge of an elevator speed control apparatus is connected between an induction motor 5 and two (R, S) of the three-phase power supply terminals. Two diagonally opposite legs of the bridge comprise single SCR's 25, 26, and the other two legs each c... | 01/01/1985 |
| 4460862 | Electronic speed and slowing down control with intrinsic safety An electronic system is disclosed for controlling both the ascendant and the descendant speed in vertical machines such as cranes, elevators, etc., in which it is required to lift different loads in a regulated and self-controlled manner, laying aside the... | 07/17/1984 |
| 4181197 | AC elevator speed control system A bidirectional triode thyristor is connected to an R phase of a three-phase induction motor through an up contact set and to its S phase through a down contact set. A full-wave rectifier bridge including four diodes is connected across the R and S phases... | 01/01/1980 |
| 4121140 | Motor control circuit A motor control circuit for preventing automatic restarting of an electric motor following an interruption of electric current flow therethrough. An electric motor incorporates winding means and a series automatic reset thermal overload protector. Current... | 10/17/1978 |
| 4084120 | Stepper motor valve actuator control apparatus An actuator control system includes a ballscrew type actuator for controlling the positioning of a valve device. A control circuit is responsive to pulsed drive signals for driving a synchronous stepper motor which is operatively coupled to the actuator. ... | 04/11/1978 |
| 4078191 | Control system for regulating the torque and speed of an electric motor A control system for regulating the torque and speed of an alternating current induction motor used in the traverse drive of an overhead travelling crane comprises an SCR bank controlled by a firing circuit responsive to actuation of an operator-controlle... | 03/07/1978 |
| 4070605 | Polyphase power control Power control apparatus and method for controlling polyphase excitation of a polyphase load. A first sequence of timong pulses are generated to represent each zero level voltage crossing of every phase voltage from a polyphase voltage source. After each o... | 01/24/1978 |
| 4070604 | Stepper motor valve actuator An actuator control system includes a ballscrew type actuator for controlling the positioning of a valve device. A control circuit is responsive to pulsed drive signals for driving a synchronous stepper motor which is operatively coupled to the actuator. ... | 01/24/1978 |
