"The Americans have need of the telephone, but we do not. We have plenty of messenger boys."
Sir William Preece, chief engineer, British Post Office ; 1878
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| Number | Title | Issue Date |
| 6940267 | Error correction by selective modulation The accuracy of certain sensors is greatly improved by improving their signal to noise ratio (SNR) in the presence of an interfering noise. Sensors were discovered which have a SNR which substantially changes when an operating parameter is selectively modulated to d... | 09/06/2005 |
| 6330171 | LC filtering with prebiased inductor for a chopping circuit The invention relates to a control circuit, in particular for a load in an automotive vehicle, comprising a chopping circuit, at least one LC filter (F1) means (20) opposing the saturation of the inductor, (L1) of this LC circuit, wherein these latter mea... | 12/11/2001 |
| 5773969 | DC-DC converter circuit and inductive load drive device using DC-DC converter circuit An inductive load drive device using a DC--DC converter circuit with which a high voltage is obtained by the discharge of electromagnetic energy stored in a coil to a capacitor, in which a bias is applied to the magnetic core of a coil (L) with the use of... | 06/30/1998 |
| 4904926 | Magnetic motion electrical generator A magnetic motion electrical generator includes an electrical winding defining a magnetically conductive zone having bases at each end, the winding including elements for the removing of an induced current therefrom. The generator further includes two pol... | 02/27/1990 |
| 4685395 | Controlled inductive coupling device An inductive coupling device is provided wherein the transmission of energy through the device is controlled by the application of a steady magnetic field within the magnetically permeable core of the device, transmission being inhibited at high magnetic ... | 08/11/1987 |
| 4507601 | Lever stroke control A manual controller for producing an output signal for control of hydraulic valves and the like. The controller has a quadrant lever consisting of an inner tube connected to a shaft and an outer tube slidable thereover. The inner tube has a palm rest at i... | 03/26/1985 |
| 4451743 | DC-to-DC Voltage converter A DC-to-DC voltage converter is disclosed for converting the voltage from a battery to provide a power supply voltage whose value can be equal to the battery voltage multiplied by or divided by a non-integral factor, e.g. 2/3. The converter operates on th... | 05/29/1984 |