A gearbox unit having an input and output, first and second superposition gears designed as three-shaft planetary gears wherein the first shafts of the first superposition gears are connected against torsion with the input on the second shafts of the superposition gears are connected and secured against torsion with the gear output. A variable change-speed gear is arranged between the third shafts of the superposition gears and a mechanism provided for controlling the speed ratio thereof. The fi...

A method for surveying and changing telephony response systems which includes using a supplementary services provider adapted to handle a very much smaller number of calls than a main telephone network and which can therefore be readily modified from time to time in order to firstly improve any market survey approach or questions but as well, test suggested modifications in a response method or approach. Further there is disclosed a prompt call back system to assist in direct user feedback.

The present invention relates to a sealing arrangement which is formed between a rotating assembly (4, 6) and a static assembly (3, 14, 15). In this sealing arrangement, the rotating assembly (4, 6, 16) has at least one cutting element (1) which engages in a counterpart surface on the static component. The present sealing arrangement is distinguished by the fact that the cutting element (1) is designed as a chipping device with a geometrically determined cutting edge with respect to the counterp...

A solid state switching arrangement includes a transmission line which acts as a primary transformer loop and acts with secondary windings carried by switching modules to apply triggering signals to the switches. The arrangement may include greater than sixty modules.

A clutch arrangement, especially for a motor vehicle, comprising a housing arrangement (12) which is filled or which can be filled with fluid, at least one first friction element (22) which can be jointly rotated with the housing arrangement (12) and at least one second friction organ (24) which can be jointly rotated with an output element (18) and which can be brought to rest against the at least one first friction element (22) in order to produce at least one interactive friction effect. At l...

A carburetor arrangement for an internal combustion engine in a manually guided implement, such as a power chainsaw, a cut-off machine, etc. is provided. A regulating chamber delimited by a regulating diaphragm is provided. Upon deflection of the diaphragm due to underpressure in the regulating chamber, the latter is connected with a fuel tank. Via at least one nozzle, the regulating chamber opens into an air channel that supplies fuel/air mixture to the engine. The carburetor arrangement includ...

The present invention relates to a mixing valve that can be included in pulmonary respiration equipment and with which oxygen (2) and air (3) can be mixed in adapted proportions. The mixing valve (1) comprises a valve housing (40) that has an internal cavity (46), which forms two mutually opposing valve seats (10d, 20d). The cavity (46) encloses an element (30) on which two valve bodies (10c, 20c) are formed. The cavity wall and the element have respective screw threads (46c' and 30c') which ena...

An advance arrangement for use in controlling timing of fuel delivery by a fuel pump comprises an advance piston which is moveable within a first bore and which cooperates, in use, with a cam arrangement of a fuel pump to adjust the timing of fuel delivery by the pump, a surface associated with the advance piston being exposed to fuel pressure within an advance piston control chamber. The advance arrangement also includes a servo-piston which is slidable within a further bore provided in the adv...

In a projection arrangement comprising a light source (1) for generating a luminous field (2), a reflecting light modulator (4; 27) onto which light coming from the luminous field (2) may be directed, said light being modulated by the light modulator (4; 27) in order to generate an image, and further comprising projection optics (5; 21, 32), arranged following the light modulator, for projecting said image, the projection optics (5; 21, 32) comprise imaging optics (5; 21) including a mirror (9, ...

A sealing arrangement for sealing a housing with respect to a shaft includes a first annular supporting element connected to the housing, a second annular supporting element connected to the shaft, and a first seal connected to one of the two supporting elements and in abradant contact with the other supporting element. To improve the sealing function of the sealing arrangement, the supporting element to which the first seal is not connected is provided with a second seal which runs frictionally...