Abstract: An absorption type air conditioning system in which a solar collector is used integrally to heat and strip refrigerant from the mixture of absorbent and refrigerant to eliminate a separated hot water or other heat transfer medium cycle as normally employed between the solar collector and the stripper generator.Also, the present invention includes an absorber which is integrally located within the confines of a deep water well used to extract heat from the entire system, together with a condenser coil or tube also located within the deep water well. The integral location of absorber and condenser within the confines of the heat sinking medium, such as a deep water well raises the overall cooling efficiency since a separated cooling cycle and heat exchanger are eliminated.The invention is particularly suited to brine type absorption systems, such as lithium bromide and water solutions where stripper generator action may take place at temperatures easily obtainable with the solar collector process included.

Abstract: A frequency conversion system, including a time shared frequency converter and a time shared band limited amplification system, whereby a plurality of information bearing signals are commonly obtained, determined, filtered and amplified over a single path. The process admits signals whose carriers are separated by frequency or phase, and whose amplitudes are different.Synchronous and asynchronous receivers which ordinarily require dual mixers, filters and amplifiers are simplified by this invention. Phase locked loop demodulators, including AM, DSSC and Costas loop demodulators, which ordinarily require a pair of phase detectors, filters and amplifiers to generate the in-phase and quadrature-phase channels are simplified by this invention. The use of a common path for the in-phase and quadrature-phase channels also permits the close matching of gain and frequency response in each channel.

Abstract: A voice-controlled electronic musical instrument provides tones responsive to audible energy imparted to a microphone. An analog voltage representative of the frequency of the audible energy imparted to the microphone controls a gate signal generator. The gate signal generator decodes the analog signal into a digital word having octave and note information. The octave and note information gates operator-selected musical tones to provide a desired output signal responsive to the audible energy applied to the microphone.