Abstract: A distance-measuring receiver and system uses a transmitter which transmits only a single continuous-wave signal. The receiver produces a first component and a second component from the received signal. The first component is frequency doubled and used to produce a signal indicative of the beginning of a measurement window. The second component is used to produce a signal indicative of the end of the measurement window. The size of the measurement window can be used to produce a real time indication of the position of the receiver form the transmitter.

Abstract: An improved apparatus for generating a stable frequency signal is disclosed. A master oscillator provides an output signal having a preselected frequency value X. A main feedback loop, a first feedback loop and a second feedback loop are provided. Deviation of the output signal from the preselected frequency value X causes the second feedback loop to be responsive at twice the frequency rate as that of the first feedback loop. The frequency difference between the values of the first feedback loop and the second feedback loop is used to produce a control signal for the main feedback loop used to control the frequency value X of the output signal. The circuit is self-correcting and exhibits high order short and long term stability. Two embodiments are disclosed.

Abstract: A distance measuring receiver system and method for determining the distance of a receiving station from a transmitting station, which provides the distance information by the reception and processing of a pair of signals (preferably continuous wave carrier) transmitted by the transmitting station. The filter subsystem 106 supplies the upper signal to the first channel 501 and the lower signal to the second channel 502 of a lane expansion subsystem 108, which produces a plurality of difference frequency signals 113, 115, 117, 119 (of preselected multiples) in accordance with the upper and lower signals. A reference subsystem 112 in accordance with the oscillator signal 121 supplies a plurality of reference signals 127, 129, 131, 133 (having frequencies equal to the frequencies corresponding to difference frequency signals).

Abstract: A modified two-stroke or four-stroke internal combustion engine comprises means and a method for increasing the power output of an internal combustion engine by providing a non-combustible fluid to the engine. The engine transfers thermal energy of combustion to the non-combustible fluid, thereby causing expansion of the fluid, and includes means for converting expansion of the fluid to mechanical power.

Abstract: A radio frequency distance measuring system and method where two continuous wave carrier signals, derived from a stable frequency source, are radiated from a known reference point. The frequency of the first continuous wave carrier signal is displaced from the frequency of the second continuous wave carrier signal by a selected difference frequency. When received at the unknown point, the two continuous wave carrier signals are mixed to provide a difference or beat frequency marker signal, delayed in arrival at the unknown point from the known point by the speed of light. A locally generated marker signal is derived from a stable frequency source at the unknown point, and has the same frequency as the difference frequency signal.

Abstract: A band-pass filter and gain stage which produces a desired passband at a preselected center frequency. The present invention can be characterized as being a very passive frequency door whose output is lightly coupled to a broad band frequency amplifier having a high gain. The present invention includes an input connected to an input impedance stage, which is connected to a monolithic filter stage, which is connected to a second impedance stage, which is connected to a gain stage, which, in turn, is connected to an output terminal. A piezoelectric quartz crystal monolithic filter or a piezoelectric ceramic monolithic filter can be employed depending on the width desired for the passband response.

Abstract: A power splitter is disclosed for dividing radio frequency (R.F.) power applied to an input terminal equally among n number output terminals, where n.gtoreq.2 and is an integer, irrespective of the impedances at the input or at the output terminals. The power splitter utilizes n number .lambda./4 inner conductors disposed in a .lambda./4 housing, which provides a common electromagnetic shield. The input terminal is formed by connecting together the first end of each inner conductor, the first ends being present at a first opening in the housing. The second ends of the inner conductors, which are all present at a second opening in the housing, are connected together outside the housing by (n-1) number .lambda. lines so as to form an electrical wheel. Each end at the second opening is an output terminal of the power splitter. A power combiner is disclosed for summing at an output terminal R.F. power applied to n number input terminals, where n.gtoreq.