Abstract: A silver halide light-sensitive photographic material for radiographic use comprising a transparent support and a silver halide emulsion layer on both sides thereof such that the blue light transmission density difference between the support and the silver halide layer is .gtoreq.0.35 and .ltoreq.0.60.

Abstract: A silver halide X-ray photosensitive material has a support bearing thereon a silver halide emulsion layer. The layer has at least three kinds of silver halide emulsions whose photographic characteristics are substantially different from each other. Out of at least three kinds of the silver halide emulsions, at least one of them is a monodisperse emulsion E.sub.1 and at least another one of them is a polydisperse emulsion E.sub.2.

Abstract: A photosensitive silver halide emulsion comprising photosensitive silver halide grains which essentially consists of monodisperse globular-shaped grains. The grains may be prepared by adding a silver halide solvent to a silver halide emulsion containing monodisperse silver halide grains of regular crystal habit at a time between the complete formation of the monodisperse silver halide grains of regular crystal habit and before commencement of chemical sensitization.

Abstract: A silver halide photographic material comprising a base having formed thereon a silver halide emulsion layer substantially made of two or more monodisperse emulsions having different average grain sizes in the range of from 0.2 to 3.0 .mu.m is disclosed. The grain size distribution curve of the silver halide grains in said emulsion layer has two or more peaks, and the distance between the highest peak and the second highest peak is at least 0.3 .mu.m.

Abstract: A nozzle for injecting fuel premixed with air into the combustion chamber of a diesel engine cylinder. Included is a piston reciprocably mounted in a nozzle body to define in combination with the nozzle body an air chamber for receiving compressed air from the combustion chamber of the engine cylinder and a fuel chamber for receiving fuel from a fuel injection pump. Formed integral with the piston, a needle valve is adapted to open and close spray holes opening to the combustion chamber. Formed in the piston is a passage having a check valve mounted therein for allowing air to pass from the air chamber to the fuel chamber.Thus, upon descent of the piston at the end of the compression stroke, the fuel is intimately premixed with the compressed air from the air chamber, prior to the introduction into the combustion chamber.

Abstract: A nozzle for the air injection of fuel into the combustion chamber of a diesel engine cylinder. Included is a plunger reciprocably mounted in a nozzle body to define an air chamber for receiving compressed air from the combustion chamber during the compression stroke of the piston in the engine cylinder. Formed integral with the plunger, a needle valve defines within the nozzle body a fuel chamber for receiving fuel to be injected. A nozzle tip secured to the nozzle body founds a premixing chamber open directly to the combustion chamber and further in communication with both air chamber and fuel chamber. Thus, upon descent of the plunger at the end of the compression stroke, the fuel from the fuel chamber is intimately premixed in the premixing chamber with the compressed air from the air chamber, prior to introduction into the combustion chamber.

Abstract: A nozzle is disclosed for the air injection of fuel into the combustion chamber of a diesel engine cylinder. The nozzle includes a piston reciprocably mounted in the nozzle body to define therein a premixing chamber to be placed in and out of communication with the combustion chamber via spray holes at the tip of the nozzle body. Slidably fitted at one end in an axial bore in the piston, a needle valve is sprung to normally close the spray holes with its other end. Toward the end of the compression stroke of the piston, the mixture of fuel and air trapped in the premixing chamber acts on the needle valve to cause same to open the spray holes against the bias of the spring and thus is injected into the combustion chamber. The spring serves to cause the needle valve to firmly close the spray holes immediately upon full injection of the fuel-air mixture.

Abstract: For the injection of premixed fuel and air into a diesel engine cylinder, a nozzle assembly has a piston reciprocably mounted in a nozzle body to define a premixing chamber therein. Fuel and air are delivered into this premixing chamber through respective ports which are simultaneously covered and uncovered by the piston. Extending through the premixing chamber, a stepped plunger has one end slidably fitted in a bore in the piston to define a pressure chamber therein for exerting a decreasing air pressure on the plunger and has the other end arranged for movement out of and back into the nozzle body for spraying the fuel-air mixture from the premixing chamber through spray holes formed therein. During the stroke of the piston to compress the fuel-air mixture trapped in the premixing chamber, the compressed mixture acts on the step of the plunger to hold same retracted in the nozzle body against the decreasing air pressure in the pressure chamber.