Abstract: An elevated downhill transport system is provided with a cable system and appropriate towers to support the cable along a variable downhill course. A single cable only, being necessary, a cable trolley is also provided that prevents the carriage from accidently leaving the cable during any part of the descent. The system relies on no outside power except gravity for the descent. Ascent can be provided for by pre-existing ski lift equipment. The entire system is simple, inexpensive and transportable, lending itself to portable operation.

Abstract: An underwater breathing device is provided that is capable of separating breathable gas bubbles from water. A collection reservoir, open at one end is capable of collecting gas and conducting it through a one-way valve to the operator. The one-way valve is provided to conduct exhaled gas to the outside and to prevent it from being exhaled into the collection reservoir.

Abstract: A sewage gas collection reservoir is provided with a valve and distribution system. Combustible gases are produced by anaerobic bacteria in mixtures of organic matter which are trapped by the cone shaped reservoir at the top of the mixture from which the gas is drawn past a valve, then past a water trap, then past an activated charcoal filter and fed into an ordinary household gas line by the vacuum created by the flow of the household gas supply. A one way valve is provided at the activated charcoal filter to prevent a reverse flow into the system and reservoir.