Abstract: The electrical generator set has two separate cooling airflows. A first airflow is generated by an impeller mounted on the drive shaft of the engine and provides for cooling the electrical generator or alternator and for partial cooling of the electrical circuitry which controls mainly the voltage of the electrical output. This airflow exists only while the engine is running. The first airflow is mixed with the exhaust gases of the internal combustion engine for noise and temperature reduction. the use of a venturi tube supports driven by the exhaust gases supports the airflow.A second airflow provides for cooling the radiator of the liquid cooled internal combustion engine and for partial cooling for the electrical circuitry. This second airflow is generated by one or more electrical fans and is independent on whether or not the engine is running.

Abstract: The compact electrical generator sets have separate cooling airflows for the cylinder of the driving internal combustion engine, for the electrical generator, and for the components which generate most of the heat. Providing separate airflows allows to reduce the size of the generator set. Use of an alternator and an electronic controller for converting the electrical energy generated by the alternator to electrical energy of the type required by the user simplifies the design. The design of the cooling airflow with multiple combined and separated airflows reduces both size of the generator set and reduces losses due to generating the airflows.

Abstract: A mobile water filtration and chlorination system in modular form provides a universal water treatment, pump and distribution system.

Abstract: A pair of stereo speakers mounted on an article of clothing worn on the upper part of the body and positioned on the shoulder portion thereof. The clothing article has a pouch for supporting a Walkman-type radio, and the speakers are coupled by cables to the radio in the normal fashion. A quick release attachment device is provided to releasably couple each speaker to the clothing article. For purposes of illustration, the clothing article comprises a pair of suspenders comprised of a pair of straps which are adapted to extend over the shoulder. Each strap has a first Velcro part secured thereto and each speaker has a second Velcro part attached to the rear face thereof, the Velcro parts being removably coupled together to interconnect each speaker and the respective strap. The pouch for the radio can be mounted on the clothing article either at the front of the wearer or on the back of the wearer.