Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7129665 | Control apparatus for feed driving system A control apparatus for a machine that can be operated at high precision in a stable control state is provided by driving a movable body with control parameters suited to the mechanical state. A control parameter calculation circuit is provided to obtain control par... | 10/31/2006 |
| 7084600 | Power control apparatus for a turbo charger equipped with an assist motor and a motor driven turbo charging apparatus A power control apparatus includes an inverter giving a rectangular waveform drive signal to an induction motor, an inverter voltage controlling section controlling an output voltage of the inverter, a converter boosting a voltage supplied to the inverter, a convert... | 08/01/2006 |
| 7026785 | Motor controller A system and method for controlling an electric motor is disclosed. The method comprises determining the operating load of the electric motor and then calculating the voltage to be applied to the electric motor in response to the operating load. The voltage to be ap... | 04/11/2006 |
| 4600872 | Apparatus for variable speed drive of an induction motor from a fixed frequency AC source A control system for driving a variable speed AC motor employing a fixed frequency AC power source, combines pulses representative of a desired slip frequency with pulses of a frequency proportional to the speed of the motor. The combined pulses are emplo... | 07/15/1986 |
| 4013911 | Displacement - electricity transducer A displacement - electricity transducer contains a movable magnetic core and a fixed magnetic core oppositely arranged so as to have predetermined gaps or clearances in at least two places. Two substantially closed magnetic circuits, each including one of... | 03/22/1977 |
