Abstract: A thermal imaging system for use in an internal combustion engines employs a removable optical housing that is inserted through a hole in the cylinder wall. The distal end of the housing supports a lens made of a material such as polycrystalline spinel or sapphire to provide a desired field of view within the cylinder and to project an image from the field of view through the internal passageway of the optical housing. A camera receives and records the image provided by the lens and optical housing. In the preferred embodiment, the distal portion of the optical housing is secured to the cylinder wall by means of threads or a breech-mount mechanism to permit quick and easy removal and cleaning of the lens. A thermocouple or heat flux gauge can be mounted to the cylinder wall within the field of view of the thermal imaging system to provide a reference point for temperature measurements.

Abstract: A sweat band made of a moisture absorbing material is shaped to fit around the head of a person and has strips of hook and loop material attached thereto for attaching a sun visor or cap. The sun visor has a concave curved portion shaped to fit the forehead of the user and a strip of hook and loop material attached to the visor curved portion so that a molded plastic visor can be attached and detached as needed by the user. The cap has a portion removed from the rear crown and sweat band and a moisture absorbing sweat band is removably attached to the cap's sweat band with hook and loop material. The moisture absorbing sweat band is elasticized and can expand in the removed portion of the crown and cap sweat band.

Abstract: A sweat band made of a moisture absorbing material is shaped to fit around the head of a person and has strips of hook and loop material attached thereto for attaching a sun visor or cap. The sun visor has a concave curved portion shaped to fit the forehead of the user and a strip of hook and loop material attached to the visor curved portion so that a molded plastic visor can be attached and detached as needed by the user. The cap has a portion removed from the rear crown and sweat band and a moisture absorbing sweat band is removably attached to the cap's sweat band with hook and loop material. The moisture absorbing sweat band is elasticized and can expand in the removed portion of the crown and cap sweat band.

Abstract: A portable, remote controlled air sampler for measuring the solid, liquid, and gaseous emissions from sources such as a fossil fuel power plant, or ambient air. The sampler comprises a pump operated suction head movably mounted on a guide means for sucking a sample of air through a selected portion of an air filter strip, a motor operated translating means for translating the suction head along the guide means, and a radio operated, remote control system for selectively actuating the translating means and suction head. The preferred embodiment of the sampler is sufficiently lightweight to be suspended from a buoyant balloon six feet in diameter or less, or having a gas capacity of 115 cubic feet or less.

Abstract: A mine warning device which comprises tensioned arms that abut the roof of an underground mine. The arms support a cone shaped shaft which is attached to a warning indicator. The indicator remains invisible within the body of the device when the rocks forming the roof are stable. Upon a shifting of the mine roof, which applies pressure to the arms of the device, the shaft is released and the warning cylinder falls into view. Preferably, the device attaches to bolts that hold plates to the mine roof and the warning indicator is fluorescent.