Abstract: A drainpipe or sewer system gravitationally conducting wet sewage for discharge into a community sewer system having a section of said drainpipe, preferably between the last feeder pipe and the discharge end of said drainpipe into the community sewer system, containing therein a means supported by and or integrated with a rotatable shaft projecting through and beyond the wall of said drainpipe, positioned to intercept the moving sewage, in a manner to cause said means and shaft to rotate and permit the sewage to continue its flow into the community sewer system whereby said rotatable shaft becomes useable as a source of energy for various and sundry purposes.

Abstract: A seat belt safety system for motor vehicles wherein all seat belts of the vehicle are elements of a common electrical circuit operative to control the drive system of the vehicle, but independent from the operation of the vehicle's engine, wherein an unbuckled seat belt in any occupied seat of the vehicle will automatically prevent putting the vehicle in motion, except in reverse gear or the lowest forward gear.