Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7100442 | Transmitter for level in a fuel tank of a motor vehicle A thick-film resistance 9 with a conductive path 8 of electrically conductive material is provided in the case of a fuel level transmitter for a fuel tank of a motor vehicle. The conductive path 8 is contacted in a sliding manner by a contact el... | 09/05/2006 |
| 6262434 | Integrated circuit structures and methods to facilitate accurate measurement of the IC devices The present invention relates, in one embodiment, to an integrated circuit including a first circuit structure, a first conductive bonding pad coupled to the first circuit structure, a second circuit structure, and a second conductive bonding pad coupled ... | 07/17/2001 |
| 5525955 | Capacitor coupled potentiometer An annular resistor member having two non-contact ends is overlaid and adhered on the surface of a base, and a rotational shaft located at the central portion of the resistor member is pivotally axially supported via a bearing. A bent electrode arm is fit... | 06/11/1996 |
| 4139831 | Control for electrical positioning drives An apparatus for the control of variable speed electrical positioning drives, especially for sewing machine positioning drives, is disclosed in two exemplary embodiments. The apparatus provides a preset nominal value of speed and a range of adjustment for... | 02/13/1979 |
| 4137517 | Potentiometric regulator of a physical magnitude which is a function whatever of other two magnitudes A regulation device is disclosed, for regulating a physical magnitude as a function of two independent parameters: the parameters can be, for example, parameters of interest in the operation of an internal-combustion engine. Instead of the conventional sp... | 01/30/1979 |
