Quotables
"Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible."
Simon Newcomb, astronomer ; Said in 1902, less than two years before the first flight at Kitty Hawk
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| Number | Title | Issue Date |
| 8125280 | Method for regulating an excited oscillation In a method for regulating an excited oscillation of a system to a resonance case of the system, instantaneous values of the oscillating quantity are discretely recorded using one sampling frequency, and the sampling frequency is selected to be below twice a maximum... | 02/28/2012 |
| 7339440 | Nonlinear pulse oscillator methods and apparatus Methods and apparatus for implementing stable self-starting and self-sustaining electrical nonlinear pulse (e.g., soliton, cnoidal wave, or quasi-soliton) oscillators. In one example, a nonlinear pulse oscillator is implemented as a closed loop structure that compri... | 03/04/2008 |
| 6973399 | Method and circuit for correcting periodic signals of an incremental position measuring system A circuit arrangement for the correction of periodic signals from an incremental position measuring system that includes a first assembly comprising a multiplexer having an input to which a periodic signal is supplied and an output out of which an output signal is t... | 12/06/2005 |
| 4163177 | Oscillation generator providing oscillations of varying amplitude An oscillation generator providing a succession of oscillations repetitively and progressively varying in amplitude includes a feedback oscillator arranged to receive its operating voltage from a capacitor that is progressively charged from a periodically... | 07/31/1979 |
| 4057769 | Circuit for generating two distinctive tone bursts with exponentially decaying envelopes An electrical signal generator comprises an electric wave oscillator for producing oscillations at one or other of two predetermined frequencies, an attenuator device for attenuating oscillations produced by the oscillator in a manner which varies over a ... | 11/08/1977 |
| 4037164 | Exponential decay wave form generator and method A command signal is provided through a buffer amplifier to an exponential signal generator which provides an exponential signal envelope at the output thereof. The exponential signal envelope is coupled to an inverting unity gain amplifier for providing a... | 07/19/1977 |
