Abstract: Arrangement for resiliently mounting a ceramic monolithic type catalytic converter element in a metal housing with a blanket of knit wire mesh material includes at least one circumferential band of high temperature intumescent material containing ceramic fibers positioned within the wire mesh blanket which prevents virtually all bypass leakage around the element and substantially reduces the temperature of the wire mesh.

Abstract: Arrangement for resiliently mounting a ceramic monolithic type catalytic converter element in a metal housing with a blanket of knit wire mesh material includes at least one circumferential band of high temperature intumescent material containing ceramic fibers positioned within the wire mesh blanket which prevents virtually all bypass leakage around the element and substantially reduces the temperature of the wire mesh.

Abstract: Combination muffler and catalytic converter utilizes an axial flow monolithic catalytic element to treat exhaust gases from an internal combustion engine and partially reduce their sound. A perforated chamber around the catalytic element, a downstream perforated tube, and an upstream flow reversal chamber further reduce the sound. The device incorporates a venturi in the exhaust gas inlet path to add secondary air. Gas swirling and gas flow reversal structure is also provided to thoroughly mix the secondary air with the exhaust gases before the mixture is passed through a flow distribution plate and into contact with the catalytic element.

Abstract: Oxygen sensor for automotive use incorporates a disc of solid electrolyte material which is mounted in the end of a short ceramic tube so as to be positioned near the end of a metal body member in which the tube is mounted and adjacent to the wall of an exhaust pipe into which the body member is mounted. For improved stability against vibration damage, the ceramic tube has an unsupported length which is less than about 150% of its diameter. Precious metal stripes on the ceramic tube carry the electrical signal generated between the electrodes on the hot electrolyte to relatively cool portions of the body member where they are conducted to external terminals through spring biased contacts. A tubular metal shield, which may enclose a porous ceramic filter, protects the electrolyte from exhaust particles and directs heat from the center of the exhaust pipe to the electrolyte disc.