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Lawrence Welk, the bandleader who entertained millions of Americans over a generation of broadcasting his TV show, once received a patent: for a music-themed design of an ashtray.
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| Number | Title | Issue Date |
| 7009349 | Electric power steering apparatus A resistor member having a resistance value substantially equal to a resistance of a relay in an ON state is inserted into a current supply path which is not inserted with the relay in current supply paths for supplying currents from a driving circuit to a brushless... | 03/07/2006 |
| 6819066 | Electric motor vehicle An electric motor vehicle includes a battery that serves as a driving source for generating electric power, a pair of positive and negative electrode portions respectively connected to a positive electrode and a negative electrode of the battery, a resistor formed o... | 11/16/2004 |
| 6060849 | Current control system for an electric motor A current control system for electric motor is disclosed. The system includes a controller, switches, and resistors. The system is located between the power source and the motor. These resistors are in series with the motor and in parallel to each other. ... | 05/09/2000 |
| 5867002 | Electromechanical device with variable resistance circuit for controlling a load, particularly of an electric motor The invention concerns an electromechanical device with variable resistance circuit serving to control a load. The device comprises a connection (10) for a source of power (12), a connection (14) apt to be connected to a load (16) supplied by the source o... | 02/02/1999 |
| 4555652 | Control circuit for operating a direct current motor during traction or braking A control circuit which permits a direct current motor to operate during traction or during braking in such a manner that energy can be either dissipated or recovered; and, in particular, the invention embodies gradual, continuous, and reversible shifting... | 11/26/1985 |
| 4408244 | Circuit safe against overload for varying the amount of power to an electric blower motor A circuit, safe against an overload, for incrementally varying the power to an electric blower motor used for heating, ventilating and conditioning vehicles, having a PTC resistor in series with other series resistors in the circuit.... | 10/04/1983 |
| 4292571 | Control device for controlling the rotational speed of a portable power tool A speed control device for portable power tools having particular applicability to electric drills. The speed control device is adapted to automatically adjust the speed of the motor in accordance with changes in the diameter of the tool bit used. The dev... | 09/29/1981 |
| 4283666 | Speed control device for a home sewing machine A speed control device for the motor of a home sewing machine, comprising, a comparator having one input connected to a reference voltage, an output connected to the motor and another input, a first control circuit with a variable resistor connected to th... | 08/11/1981 |
| 4264847 | Speed control for a four pole motor A four pole d.c. motor speed control is provided by connecting two of the opposed brushes together to ground and the intermediate brushes to separate terminals of a switch means which in energized positions connects a grounded power supply to at least one... | 04/28/1981 |
| 4236103 | Control circuit for a direct current motor A control circuit for a direct current electric motor including a rectifying bridge for supplying the motor with direct current and a regulating circuit including a triac, the energizing angle of which is determined by a capacitor connected in series with... | 11/25/1980 |
