Abstract: A portable, easily mountable, temporary exhaust removal system adapted to re-direct exhaust emissions away from an internal combustion engine having an exhaust conduit that exhausts combustion gas from the engine.

Abstract: A portable, easily mountable, temporary exhaust removal system adapted to re-direct exhaust emissions away from an internal combustion engine having an exhaust conduit that exhausts combustion gas from the engine.

Abstract: A composite for use in forming a multi-layer printed circuit board, comprised of an INVAR® sheet having a thickness of between 0.5 mil and 5 mil; and a layer of electrodeposited copper on at least one side thereof. The copper has a thickness of between 1&mgr; and 50&mgr;, wherein the composite has a thermal coefficient of expansion (TCE) of about 2.8 to 6.0 ppm at temperatures between 0° F. and 200° F.

Abstract: A composite for use in forming a multi-layer printed circuit board, comprised of an INVAR® sheet having a thickness of between 0.5 mil and 5 mil; and a layer of electrodeposited copper on at least one side thereof. The copper has a thickness of between 1&mgr; and 50&mgr;, wherein the composite has a thermal coefficient of expansion (TCE) of about 2.8 to 6.0 ppm at temperatures between 0° F. and 200° F.

Abstract: A conductive copper foil for use in preparing printed circuit boards is protected from damage during storage, shipment and further processing by covering at least one side of the foil with a sheet of plastic film. The film is removably joined with the foil as a result of the essential absence of gaseous material between the film and the foil. Thus, the film conforms intimately to the contours and shape of the foil surface and clings tightly thereto to permit movement and further processing of the foil with the film adhering tightly thereto. The absence of air between the film and the foil is produced by oppositely statically electrically charging the film and the foil such that they are forced together sufficiently to squeeze the air out from therebetween.

Abstract: A conductive copper foil for use in preparing printed circuit boards is protected from damage during storage, shipment and further processing by covering one side of the foil with a sheet of polyethylene film. The film is removably joined with the foil by an adhesive material placed between the film and the foil in a marginal area of the latter. The film is selected to be sufficiently resistant to laminating temperature and pressure conditions so as to remain in its covering, protecting relationship to the foil and avoid sticking to the laminating press plate and retain its removability from the foil after lamination.

Abstract: A flame ionization detector adapted for use in hazardous areas and for mounting in any attitude, capable of using as small a flame as can be dependably maintained because of an arrangement of the flame at the open end of a thin-walled small diameter tubular electrode inside a relatively long open ended cylindrical collector and the regulation of the rates of flows which make it possible to maximize the sensitivity of the detector to the presence of an organic vapor. Excess air is maintained at a predetermined minimum. The inside diameter of the collector is made approximately twice the visible diameter of the widest point of the flame. A curtain of air flowing at a predetermined rate through the annular passage between the electrode and collector is directed into encompassing contact with the flame and the proximity of the collector to the flame maintains a relatively dense ion bearing layer of gases at the surface of the collector.