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...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 7353614 | Vehicle compass system with continuous automatic calibration The compass system of the present invention utilizes an improved calibration routine in which a processing circuit of the compass recalibrates the compass each time three data points are obtained from a magnetic field sensor that meet predetermined criteria. One suc... | 04/08/2008 |
| 4954763 | Resolver analog to digital input module for use in a programmable controller system The resolver input module for use in programmable controller systems is one of several modules mounted in a rack to form a programmable controller. The module's function is to provide position data from an externally located resolver which is connected to... | 09/04/1990 |
| 4466278 | Self-adjusting bias for synchro system A system for transmitting an EPR (Engine Pressure Ratio) from a gas turbine is provided with a resolver component (30) which modifies the EPR in accordance with variations in the optimum EPR for a particular turbine under particular conditions. The inform... | 08/21/1984 |
| 4400192 | Apparatus and method for generating clock pulses from a power selsyn multiple motor drive system for a glassware forming machine An apparatus and method for generating clock pulses to an electronically controlled glassware forming machine from the variable frequency power present in a power selsyn multiple motor drive system is disclosed. The frequency of the power present in the s... | 08/23/1983 |
| 4219766 | Hybrid dual mode servo-system A dual mode servo-system providing improved motion characteristics and improved noise immunity. A relatively movable member is driven by control signals derived from actual velocity feedback signals during coarse mode operation. At the beginning of fine m... | 08/26/1980 |
| 4060799 | Two-speed resolver employing differential reduction techniques A two-speed resolver system wherein the rotor of a fine brushless resolver which is directly connected to the shaft to be instrumented is connected to the rotor of a coarse resolver so that the rotor ofthe coarse brushless resolver rotates at a proportion... | 11/29/1977 |
