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 |
| 4504965 | Rotary anode X-ray tubes In the case of tubes with magnetically mounted anodes, it is difficult to obtain an adequately stable mounting of the anode shaft for all stresses to be expected, in particular, in the case of tilting and pivoting. To this end, the disclosure provides tha... | 03/12/1985 |
| 4504966 | Stereo inhibitor for AM stereo receiver An AM stereo demodulator having monophonic and stereophonic modes of operation and adapted to demodulate a QAM signal whose quadrature-phase signal has a low frequency slot containing substantially no information signal therein. The demodulator includes a... | 03/12/1985 |
| 4504967 | Method and apparatus for damping spurious vibration in spring reverberation units A method of determining the physical location of undesired resonance zones induced by acoustic feedback in a spring reverberation unit and damping the vibration of these resonance zones. The improved spring reverberation unit with damping material located... | 03/12/1985 |
| 4504968 | Equalizer apparatus having two dimensional display In a presettable graphic equalizer for use in a car stereo or the like, a display device capable of two-dimensional display is disposed, whereby a frequency characteristic presently given to audio signals can be immediately known from the display of the d... | 03/12/1985 |
| 4504969 | Rectangular pattern recognition apparatus A rectangular pattern recognition device is disclosed which operates to recognize and note the position of solid-line rectangles drawn on an input form, document, or the like. The apparatus first recognizes vertical and horizontal line segments and then d... | 03/12/1985 |
| 4504970 | Training controller for pattern processing system A pattern processing system associates image input patterns with desired response codes. The image input is stored in an image buffer as an addressable array of sample values. An address sequencer provides an address stream containing a plurality of inter... | 03/12/1985 |
| 4504971 | Process and device for the automatic segmentation of a scanned image in an image pattern recognition system A pattern recognition system comprising scanning means (1) for producing a binary signal indicative of the state of the elementary areas in successively scanned columns of elementary areas and segmentation means to separate from said signal data relating ... | 03/12/1985 |
| 4504972 | Method and apparatus for automatic recognition of image and text or graphics areas on printed masters A method and apparatus for automatically recognizing the presence of an image area and a text or graphics area on a printed master which is being examined for determination of the textual content thereof employ an optoelectronic video scanner, the scanned... | 03/12/1985 |
| 4504973 | Automatic disabling of AFC/AFT controller during receiver circuit tuning An electromagnetic wave receiver system with an AFC/AFT controller and an adjustable tuner has the improvement whereby the AFC/AFT controller is automatically disabled when the tuner is being adjusted. The automatic disabling is implemented by a sensor wh... | 03/12/1985 |
| 4504974 | Opto-electronic repeater An opto-electronic repeater provides by means of a differentiation circuit and a trigger circuit a considerable extension of the life of the radiation-emitting element by reducing the duty cycle of the control signal for the radiation-emitting element.... | 03/12/1985 |
| 4504975 | System for transmitting digital signals over an optical fiber The receiver of an optical-fiber transmission system comprises a device for restoring each digital signal comprising a first comparator comparing the level of the electric signal with a first reference level and generating a signal when the level of the e... | 03/12/1985 |
| 4504976 | Device for regulating a laser diode The present invention relates to a device for regulating a laser diode, which comprises a generator of a pilot frequency signal modulated by a reference signal forming part of a composite signal to be emitted and a gain regulator of the composite signal. ... | 03/12/1985 |
