Abstract: A process for the preparation of shaped, electrically conductive articles from silicon powder by sintering the powder while it is being pressed or sedimented in a mould at a temperature of 1150.degree.-1250.degree. C. in an inert atmosphere and in the presence of boron oxide, optionally followed by adding a further amount of boron into the sintered shaped article. The boron oxide, which is used in an amount of 0.1-11% by weight, based on the silicon powder, can be added in the form of an aqueous solution.

Abstract: Method for cleaning particles trapped in a filtermatrix of a magnetic separator in the presence of a magnetic field. A cleaning fluid is passed through the filtermatrix which the filtermatrix is heated to a temperature higher than the Curie-temperature of the filtermatrix material.

Abstract: A pump and pump system employs electromagnetic actuation during discrete, periodic time periods, imparting rapid strokes covering small distances. Each stroke is delineated by stop members at least one of which is of wedge-like form and is controllably shifted to vary the stroke.

Abstract: A device for distributing fuel to a combustion engine provided with two or more fuel pumps which are electromagnetically driven, the stroke of said fuel pumps being bounded by an adjustable stop bearing on a fixed stop support.In order to avoid variation of the adjusted pump displacements due to the frequent, heavy impacts which are exerted by the armature of electro-magnets through the stop member on the stop support, the stop support forms part of a firm monolith, while also other pump parts form part of said firm monolith.

Abstract: A method of separating more magnetic particles from less magnetic particles, contained in a fluid medium which is subjected to a magnetic field, in which as fluid liquified gas is used.

Abstract: A pump and pump system employs electromagnetic actuation during discrete, periodic time periods, imparting rapid strokes covering small distances. Each stroke is delineated by stop members at least one of which is of wedge-like form and is controllably shifted to vary the stroke.

Abstract: Device for supplying fuel to the atomizer of a combustion engine comprises at least a pump to be connected with the atomizer having a piston-bounded pump chamber and an electromagnet for reciprocating said piston.Said device is improved, particularly with regard to the seal of the pump piston, the control and the adjustment of the pumped quantity of fuel, the life-time and the cooling of the device, the compactness and simplicity of construction and/or simplification of maintenance.

Abstract: A pump and pump system employs electromagnetic actuation during discrete, periodic time periods, imparting rapid strokes covering small distances. Each stroke is delineated by stop members at least one of which is of wedge-like form and is controllably shifted to vary the stroke.

Abstract: Device for supplying fuel to the atomizer of a combustion engine comprises at least a pump to be connected with the atomizer having a piston-bounded pump chamber and an electromagnet for reciprocating said piston.Said device is improved, particularly with regard to the seal of the pump piston, the control and the adjustment of the pumped quantity of fuel, the life-time and the cooling of the device, the compactness and simplicity of construction and/or simplification of maintenance.

Abstract: Device for supplying fuel to the atomizer of a combustion engine comprises at least a pump to be connected with the atomizer having a piston-bounded pump chamber and an electromagnet for reciprocating said piston.Said device is improved, particularly with regard to the seal of the pump piston, the control and the adjustment of the pumped quantity of fuel, the life-time and the cooling of the device, the compactness and simplicity of construction and/or simplification of maintenance.

Abstract: Device for supplying fuel to the atomizer of a combustion engine comprises at least a pump to be connected with the atomizer having a piston-bounded pump chamber and an electromagnet for reciprocating said piston.Said device is improved, particularly with regard to the seal of the pump piston, the control and the adjustment of the pumped quantity of fuel, the life-time and the cooling of the device, the compactness and simplicity of construction and/or simplification of maintenance.

Abstract: An injector for giving off fuel to at least one fuel inlet of a combustion engine, in which the pump chamber of at least one fuel pump has a displacer volume adjustable by control-means, in that a displacer body is coupled with a stop member consisting of a hardened roller element, said roller element being able to be produced as ball, barrel or cylinder, at a low cost, in accurate dimensions and with a high degree of hardness.

Abstract: Device for supplying fuel to the atomizer of a combustion engine comprises at least a pump to be connected with the atomizer having a piston-bounded pump chamber and an electromagnet for reciprocating said piston.Said device is improved, particularly with regard to the seal of the pump piston, the control and the adjustment of the pumped quantity of fuel, the life-time and the cooling of the device, the compactness and simplicity of construction and/or simplification of maintenance.

Abstract: In order to improve the ignition of the fuel-air-mixture provided in the combustion cylinder at a low fuel expenditure the displacement member of a first fuel pump is coupled with an armature of an electro-magnet and at the same time an air supply conduit of the combustion engine is provided with a second atomizer supplying fuel to the air.In this combustion engine the first atomizer may inject fuel in a finely divided condition in the vicinity of the spark-plug, so that the extra rich fuel-air-mixture can be ignited easily in the vicinity of the spark-plug as a result of which the combustion of the remaining, relatively poor fuel-air-mixture takes place.

Abstract: In order to reduce the CO-content in exhaust gases of combustion engines, the atomization is improved by coupling the displacer body of a fuel pump with the armature of an electro-magnet, which armature is arranged so as to be movable between two electro-magnets and is adapted to move each time to one of the two electro-magnets at the alternating energization of the latter.

Abstract: A pump and pump system employs electromagnetic actuation during discrete, periodic time periods, imparting rapid strokes covering small distances. Each stroke is delineated by stop members at least one of which is of wedge-like form and is controllably shifted to vary the stroke.

Abstract: An injector for delivering fuel to a combustion engine in which the pump chamber of each fuel pump has a volume adjustable by control means, is provided with a displacer body which is connected to an armature of an electromagnet. The stroke of the displacer body is limited by an adjustable stop and should be influenced as less as possible by wear due to stopping a considerable mass of the armature every time. In order to expose the injector less to wear the displacer body is coupled with the armature through an elastic coupling.

Abstract: An injector for delivering fuel to at least one atomizer of a combustion engine comprises at least one pump communicating with the atomizer and control-means depending upon the pressure in the inlet manifold of the combustion engine for regulating the quantity of fuel to be atomized by the atomizer.The invention has for its object to avoid, in the decelerating state of the combustion engine, environmentally polluting constituents in the exhaust gases of the combustion engine and to prevent spoiling of fuel.This is achieved by providing the control-means with a switch for stopping the pump when the pressure in the inlet manifold drops below a given value. Soon after the decelerating state of the combustion engine is realized, this injector does no longer supply any fuel.