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"That’s an amazing invention, but who would ever want to use one of them?"
President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
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| Number | Title | Issue Date |
| 7117070 | Power flow controller responsive to power circulation demand for optimizing power transfer A power flow controller responsive to power circulation demand for optimizing power transfer is disclosed. When a power flow controller operates at its rated capacity, it can no longer regulate from-bus voltage set-points, line power flow set-points, or both. In suc... | 10/03/2006 |
| 6563237 | Multi-voltage electromechanical time switch In an electromechanical time switch, an electric motor driven clock mechanism operates an electrical switch to automatically activate electrical devices at pre-selected times. The clock mechanism comprises a nominal 120 V motor. Removable jumpers are prov... | 05/13/2003 |
| 6459175 | Universal power supply A power supply detects power requirements of an electrical device and configures itself to provide the correct power to the device. By using a connector that isolates the device from its battery, the power supply can provide power to the device, recharge ... | 10/01/2002 |
| 5581134 | Bypass switch for RF networks A make-before-break bypass switch is combined with a pair of probes projecting from a support where a member is provided with sockets to slidably receive the probes. The probes define a gap in a first RF circuit. The corresponding sockets are connected by... | 12/03/1996 |
| 4888494 | Electromechanical lamp switching An electromechanical switching device connects and disconnects a second lamp means from a first circuit powering a first lamp means upon alternate powerings of the first circuit. A mechanical device switches the switching means and an electrical circuit a... | 12/19/1989 |
| 4851707 | "Fritting" technique and apparatus for improving the sound of switches and connectors in audio circuits The present invention is capable of applying a voltage across the contacts of a switch or connector in an audio system, the voltage being of sufficient level to provide a sufficiently high current to break down an insulating layer which has built up in th... | 07/25/1989 |
| 4695739 | Multi-function switch-controlled lamp circuit A multi-function circuit controller provides auxiliary control functions for an existing single-pole, single-throw toggle switch by counting the number of changes of state of the switch that occur within predesignated delay periods from one state change t... | 09/22/1987 |
| 4354747 | Switching circuit for regulation of camera functions A digital circuit is described for controlling functions of a camera wherein the circuit is powered by a potential source which is connected to the circuit through a relay actuated switch. The circuit employs a plurality of D-flip flops to regulate functi... | 10/19/1982 |
| 4134026 | Mechanical switch circuit comprising contact conditioning means Two reed switches are alternately closed by a magnet rotating with a shaft of a water meter or the like which is to be read remotely. A capacitor discharges through the reed switches when the same are closed, increasing the switch current without increasi... | 01/09/1979 |
| 4101786 | Master-satellite irrigation control system with remote proportional timing Apparatus, and a related method, for proportionately varying from a master unit the durations of irrigation at a plurality of valve stations controlled by a number of satellite units, and for transmitting over a single pair of wires control signals for st... | 07/18/1978 |
| 4090094 | Flasher switch with outage indication A flasher switch of the type for flashing automobile lamps is provided with outage indication consisting of a split capacitor or two parallel capacitors connected in series with one of two coils producing opposed magnetic forces in a core controlling the ... | 05/16/1978 |
