Did You Know...
...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 8154154 | Automatic switch configuration A system including an input and a controller. The input is configured to receive a switch signal from multiple different types of switches. The controller coupled to the input and can determine the type of the switch by an analysis of the switch signals received fro... | 04/10/2012 |
| 8102081 | Electronic apparatus According to one embodiment, an electronic apparatus includes a cabinet having an outer surface and an inner surface, a plurality of operation button display portions formed on the outer surface of the cabinet, a touchpad which is provided on the inner surface of th... | 01/24/2012 |
| 7439636 | Driver system for MOSFET based, high voltage electronic relays for AC power switching and inductive loads A method and apparatus provides for high-speed switching of high-voltage and high power MOSFET-based solid state relays. A driver for a MOSFET based, high voltage, high current electronic relay includes a current supply for actuating the switching circuit and a tran... | 10/21/2008 |
| 7061143 | Actuator unit with a base actuator an additional actuator and control unit An actuator unit includes a base actuator and an additional actuator, via which a useful circuit can be opened and closed. Given proper functioning, the base actuator can be activated by supplying electric energy and deactivated by not supplying electric energy. The... | 06/13/2006 |
| 5886430 | Refrigerator ice door delay circuit Disclosed is an electronics device for use with a refrigerator/freezer for controlling the dispensing of ice cubes by an ice auger through a door flap when a cradle is pressed. The electronics device comprises a solenoid in operative connection with the d... | 03/23/1999 |
| 5719787 | Method for on-line dynamic contingency screening of electric power systems A method for on-line dynamic contingency screening of electric power systems employs a sequence of contingency classifiers which are based on a method for finding the controlling unstable equilibrium point of the power system known as the boundary of stab... | 02/17/1998 |
| 5652691 | Electrically operated control device and system for an appliance and method of operating the same An electrically operated control device and system for an appliance and method of operating the same are provided, the system comprising a power source of alternating electrical current that has a repeating voltage wave cycle and a repeating current wave ... | 07/29/1997 |
| 5610453 | Pulsewidth modulation (PWM) frequency slider A frequency slider circuit for reducing power dissipation in the form of switching losses in a switching device when the switching device is near its desired maximum temperature limit is disclosed herein. The switching device controls an electric load, su... | 03/11/1997 |
| 5488565 | Tamper detection methods and apparatus for load management terminals Apparatus and methods are claimed for detecting tampering with a load management terminal, wherein the terminal has a load control relay coupled to a power line for selectably decoupling the load from the power line. One embodiment of the claimed apparatu... | 01/30/1996 |
| 5483462 | On-line method for determining power system transient stability A fast and reliable method for determining power system transient stability is presented for on-line power system dynamic security assessment. This method is based on the direct (Lyapunov theory) approach controlling the unstable equilibrium point (UEP). ... | 01/09/1996 |
| 5424904 | Circuit for electrically controlled intermittent motion A circuit for electrically controlled intermittent motion having a time-delay relay and an all-purpose double-pole-double-throw relay for use in conjunction with a gear-head motor having an output shaft, which, upon application to the circuit of a trigger... | 06/13/1995 |
| 5375027 | Fail safe cartridge fire unit A fail-safe circuit for preventing an inadvertent communication of a signal from an input terminal to an output terminal includes a series switching network electrically connected between the input terminal and the output terminal. The series switching ne... | 12/20/1994 |
| 5196730 | Arrangement of automatically restoring normal operation of latch-in relay In order to automatically restore a normal switching position of a relay armature from an accidental OFF switching induced by external impact or the like, the output of the relay is monitored and is applied to a differentiating circuit. A comparator is pr... | 03/23/1993 |
| 5087825 | Capacity responsive keyboard A capacity responsive keyboard which eliminates the necessity for metal films on the touch surface includes an insulated substrate having a plurality of electrically conductive plate members mounted thereon and a dielectric member positioned over the plat... | 02/11/1992 |
| 4763222 | Vehicle suspension control with actuating circuit protection A motor vehicle suspension control includes a solenoid actuator having an actuating coil connected in series with a transistor across an electric power source and circuit protection apparatus for the transistor. The voltage across the transistor is monito... | 08/09/1988 |
| 4680706 | Recloser control with independent memory A microprocessor based recloser control including a independent memory is disclosed. The independent memory is alterable by processor means and by input and output means independent of the processor means. The independent memory is non-volatile and requir... | 07/14/1987 |
| 4639611 | Bridge circuit system A sensing circuit system including circuitry for sensing impedance variations of a variable impedance element. As disclosed, a bridge circuit system includes a bridge circuit to which the variable impedance element is couplable. The bridge circuit system ... | 01/27/1987 |
| 4555593 | Electronic telephone relay An electronic relay circuit for replacement of an A-type relay in a step-by-step selector and connector of a telephone exchange system is implemented with a first operational amplifier (10) connected to the tip (T) and ring (R) conductors of a telephone l... | 11/26/1985 |
| 4501932 | Solid state electronic dial pulse receiver circuit An electronic switch for use in the tip and ring circuit of a rotary dial telephone pulsing system is disclosed. The electronic switch is a functional replacement for a single pole, double throw electromechanical pulsing relay having normally open and nor... | 02/26/1985 |
| 4477734 | Control system for eddy current coupling drive for armoured face conveyors A control system for eddy current coupling drive for armoured face conveyors wherein the systems controls a number of eddy current drives via a pair of power supply lines and a single pilot line. A main contactor controlled by a relay is held closed by co... | 10/16/1984 |
| 4152629 | Lamp responsive to the human touch upon a living plant and control system therefor A system for controlling an electrical circuit, such as a lamp circuit, in response to the human touch whereby the circuit may be turned on and off by means of the human touch upon a conductive element of the circuit, one such conductive element being a p... | 05/01/1979 |
| 4084103 | System-state and operating condition sensitive control method and apparatus for electric power delivery systems This invention provides a method and apparatus for determining a precise switching sequence for the power switching elements of electric power delivery systems of the on-off switching type and which enables extremely fast transient response, precise regul... | 04/11/1978 |
