Abstract: An apparatus for measuring volatile organic compounds in a gas includes a sensor chamber having a housing with a gas inlet, a gas outlet, and a gas flow path from the gas inlet to the gas outlet, a set of baffles within the housing and positioned in the gas flow path, and a set of sensors within the housing and positioned in the gas flow path. Each sensor has an electrically conductive polymer whose electrical properties are dependent upon the presence of specific volatile organic compounds in the gas flow. Desirably, the set of baffles and the set of sensors are cooperatively positioned such that the time for gas to flow from the gas inlet to each of the sensors is substantially the same. The apparatus further includes a pump that removes the gas from the gas outlet of the housing, and an electronic circuit that measures the electrical properties of each of the sensors.

Abstract: Data is written into thin overcoated optical recording media in such a way that pit formation is accompanied by breaching of the overcoat at least temporarily so as to release gases/vapors produced during pit formation. Improved jitter and CNR is obtained.

Abstract: This invention relates to a dual fuel engine cylinder with primary interest focused upon an injector valve for an alternate fuel in which the body of the valve is disposed into said cylinder through the head thereof and may be removed therefrom as for servicing without disturbing the remaining operation of the cylinder.

Abstract: The invention is directed to reducing unburned hydrocarbons during engine idling. During idling, one cylinder bank of an engine is alternately deactived by fuel cut-off structure with another cylinder bank. Therefore, one bank works twice as hard and consequently produces much lower emissions. A timer alternates between the cylinder banks anywhere from fifteen seconds to four minutes.