Abstract: A fault gas detection system for a liquid filled high voltage transformer, the transformer including a main tank and an expansion tank the tanks fluidic connected by an exchange conduit such that gas and/or a transformer liquid is able to exchange between the tanks, the gas detection system including: a chamber with a top cover, a predefined horizontal level-plane in the chamber defining a maximum liquid level of a transformer liquid in the chamber during use, a fluid-channel including a fluid-egress at a level equal to or higher than the top cover and a fluid-ingress lower than the level of the level-plane, a level sensor designed to measuring and/or indicating a liquid level. A respective transformer and a respective wind turbine system is also provided.

Abstract: A fault gas detection system for a liquid filled high voltage transformer, the transformer including a main tank and an expansion tank the tanks fluidic connected by an exchange conduit such that gas and/or a transformer liquid is able to exchange between the tanks, the gas detection system including: a chamber with a top cover, a predefined horizontal level-plane in the chamber defining a maximum liquid level of a transformer liquid in the chamber during use, a fluid-channel including a fluid-egress at a level equal to or higher than the top cover and a fluid-ingress lower than the level of the level-plane, a level sensor designed to measuring and/or indicating a liquid level. A respective transformer and a respective wind turbine system is also provided.

Abstract: The present invention relates to a recombinant human antibody comprising an antibodysequence specific for the MSP-3 antigen of Plasmodium falciparum. In particular, the invention relates to a recombinant human antibody which is specific for the MSP-3194-257 antigen. The invention further relates to nucleic acid encoding such antibodies and to uses of these antibodies, in particular in the treatment or prophylaxis of malaria.

Abstract: The invention relates to a valve assembly for a refrigeration plant of the kind used for controlling the flow of refrigerant from the evaporator to the compressor. The closure member for the valve unit is controlled directly or indirectly by a movable wall of an expansible chamber filled with a refrigerant medium having vapor and liquid phases. The pressure exerted by the vapor phase of the medium provides a bias in a valve opening direction which is directly related to the temperature of the liquid phase and is opposed by a spring bias in the valve closing direction. A heat transfer element such as a heating resistor in the liquid phase is heated or allowed to cool in a controlled manner by an external control unit. A temperature responsive sensor element in the liquid phase of the medium is part of a feedback system for the control unit which allows a selected temperature to be maintained in the chamber which results in a desired constant pressure in a valve opening direction to be maintained in a chamber.

Abstract: The invention relates to a valve unit for a refrigeration plant of the kind used for controlling the flow of refrigerant from the evaporator to the compressor. The closure member for the valve unit is controlled directly or indirectly by a movable wall of an expansible chamber filled with a refrigerant medium having vapor and liquid phases. The pressure exerted by the vapor phase of the medium provides a bias in a valve closing direction which is directly related to the temperature of the liquid phase. A heat transfer element such as a heating resistor in the liquid phase is heated or allowed to cool in a controlled manner by an external control unit. A temperature responsive sensor element in the liquid phase of the medium is part of a feedback system for the control unit which allows a selected temperature to be maintained in the chamber which results in a desired constant pressure in a valve closing direction to be maintained in the chamber.

Abstract: The invention relates to a valve assembly. A closure member for the valve unit is controlled directly or indirectly by a movable wall of an expansible chamber filled with a refrigerant medium having vapor and liquid phases. The pressure exerted by the vapor phase of the medium provides a bias which is directly related to the temperature of the liquid phase. A heat transfer element such as a heating resistor in the liquid phase is heated or allowed to cool in a controlled manner by an external control unit. A temperature responsive sensor element in the liquid phase of the medium is part of a feedback system for the control unit which allows a selected temperature to be maintained in the chamber which results in a desired constant pressure to be maintained in the chamber. A pilot valve unit is disposed between the valve closure member and the movable wall. An expansible chamber behind the closure member houses a spring for biasing in a valve closing direction.

Abstract: The invention relates to a valve assembly. A closure member for the valve unit is controlled directly or indirectly by a movable wall of an expansible chamber filled with a refrigerant medium having vapor and liquid phases. The pressure exerted by the vapor phase of the medium provides a bias which is directly related to the temperature of the liquid phase. A heat transfer element such as a heating resistor in the liquid phase is heated or allowed to cool in a controlled manner by an external control unit. A temperature responsive sensor element in the liquid phase of the medium is part of a feedback system for the control unit which allows a selected temperature to be maintained in the chamber which results in a desired constant pressure to be maintained in the chamber. A pilot valve unit is disposed between the valve closure member and the movable wall. An expansible chamber behind the closure member houses a spring for biasing in a valve closing direction.

Abstract: A machine for forming heads on shanks, in particular nail heads, where the shanks are temporarily secured in a preferably rotary tool defining wholly or partially the shape of the heads and co-operating with a rotary roll. According to the invention at least one roll is adapted for internal rolling with respect to one or more of rings serving as tools, the shanks being located substantially radially in said rings.

Abstract: The invention relates to a valve assembly. A closure member for the valve unit is controlled directly or indirectly by a movable wall of an expansible chamber filled with a refrigerant medium having vapor and liquid phases. The pressure exerted by the vapor phase of the medium provides a bias which is directly related to the temperature of the liquid phase. A heat transfer element such as a heating resistor in the liquid phase is heated or allowed to cool in a controlled manner by an external control unit. A temperature responsive sensor element in the liquid phase of the medium is part of a feedback system for the control unit which allows a selected temperature to be maintained in the chamber which results in a desired constant pressure to be maintained in the chamber. A pilot valve unit is disposed between the valve closure member and the movable wall. An expansible chamber behind the closure member houses a spring for biasing in a valve closing direction.

Abstract: An electric discharge printing device has the stylus formed as a conductive lamina with the stylus tip formed as the corner at which two edges of the lamina of the stylus intersect. The lamina is electrically energized to exert the appropriate electric discharge printing action on a copy sheet, such as a duplicating stencil to be cut electrically. The plane of the lamina is perpendicular to the copy sheet but parallel to the direction of relative motion between the stylus tip and the sheet, in use of the device.

Abstract: The disclosure relates to a thermostatic expansion valve for refrigeration plants, particularly with an air-cooled condenser, comprising an operating element which is loaded in the opening direction against the force of a spring by a pressure dependent on the superbeating temperature of the evaporator and possibly relieved by the evaporator pressure, and comprising a closure member which is adjustable by the operating element and co-operates with a seat.

Abstract: The invention relates to a thermostatic valve assembly for refrigeration systems. The valve assembly is between the condenser and the evaporator and includes two valve units in series. The two valve units are shown integrated in one casing but could be provided with individual casings. The second valve unit has the conventional thermostatic function while the first valve unit functions to isolate the second valve unit from the effects of varying condenser pressures which go from high in the winter to low in the summer. In a pressure chamber between the two valve units a mean pressure is maintained which is between the condenser and evaporator pressures. The first valve unit is controlled by a balancing between opening forces created by evaporator pressure and a differential spring and a closing force created by the mean pressure in the mean pressure chamber.

Abstract: The invention relates to a thermostatic expansion valve assembly for a refrigeration installation of the type having condenser and evaporator units. The valve assembly controls the flow of refrigerant between the condenser and the evaporator and has a conventional operating unit which is dependent upon the superheat temperature of the evaporator. Condenser pressure for summer operation is on the order of being five to ten times greater than for winter operation and this represents a greater flow quantity. Compensation for this variance in condenser pressure is provided by a seat and closure member design in which the valve is caused to open at a slower rate than any increase in the condenser pressure. This is done by equipping the closure and valve seat with a piston and cylinder construction which defines an expansible chamber which has fluid communication with the condenser inlet port.

Abstract: The invention relates to a thermostatic expansion valve assembly for refrigeration units. Condenser pressures are normally five to ten times greater in the summer than in the winter. In the assembly hereof the characterostic adjustment curve is made less dependent on the condenser pressure by reason of having two flow restricting zones in series in which one of the zones has a variable rate closing mode of operation which restricts flow at a constantly increasing rate as the condenser pressure rises.