Abstract: A drive assembly for a track-laying vehicle adapted to travel in a horizontal direction along the ground has a horizontally elongated frame having two opposite ends and upper and lower edges extending parallel to the direction between the ends, a drive wheel at one of the ends, a support fixed on the frame between the ends, and a guide on the frame extending between the fixed support and the other end along a line forming an acute angle with the direction and extending downward toward the other end. A movable support displaceable parallel to the line in the guide carries an idler wheel at the other end. A spring braced between the supports urges the idler wheel parallel to the line away from the drive wheel. A plurality of ground wheels are mounted along the lower edge between the drive and idler wheels and an endless track looped around the wheels extends parallel to the direction along the idler wheels. A drive connected to the drive wheel rotates the drive wheel and displaces the track around the wheels.

Abstract: In the case of a data transmission system for the exchange of digital data between a central processor unit and several peripheral control modules which are connected to the former by a bus system such that communication is enabled and which are provided for the purpose of activating one each, respectively, out of several safety devices such as airbags or belt tensioning systems, or similar devices, in a motor vehicle, and wherein these peripheral control modules are each provided with one buffer capacitor whose energy content is sufficient for operating the respective module, and the device driven by this module, within specifications over a limited period of time, the bus system is designed as a single wire system for the purpose of achieving a simple setup and reducing installation and fitting costs. In this single wire system the control modules are supplied with electrical operating energy, and digital data are transmintted, by the same line sections.

Abstract: The invention provides an arrangement for detecting the temperature of an automatic gearbox which has a temperature sensor and a starter-interlock contact switch in the gearbox component and, externally with respect thereto, a gearbox control device to which signal information from the temperature sensor and from the starter-interlock contact switch can be fed via separate signal lines. The temperature sensor and the starter-interlock contact switch are connected to a common signal line which leads to the gearbox control device, specifically in a series or parallel circuit arrangement.

Abstract: Soft quartz glass having low viscosity and a low thermal coefficient of expansion, high electrical insulation capability and free from release of contaminants, when used as a bulb of an incandescent lamp or as an envelope in an arc vessel of a discharge lamp, is a quartz glass made of ultra-pure quartz (SiO.sub.2), for example having a purity of 99.99 mol-%, doped with stoichiometric compounds of alkaline earth oxides with boron oxide, optionally also with a small quantity of Al.sub.2 O.sub.3 in an overall quantity of the doping substance of between about 0.05% to 0.8%, by weight.

Abstract: An arrangement drives an automatic selector appliance of a change-speed gearbox of a motor vehicle into a position for emergency running in the event of a failure of an electronic control unit. A specified forward gear is selected, after the vehicle has come to rest, by manually moving a range selector valve into a P position and back into a D position.

Abstract: In an arrangement and in a method for controlling an automatic shift device of a gear-change transmission, gear shifts which are initiated by the driver via the selector device and which would result in inadmissible engine speeds are prevented and it only becomes possible to permit them again via stored shift-line characteristic diagrams.

Abstract: Soft quartz glass having low viscosity and a low thermal coefficient of expansion, high electrical insulation capability and free from release of contaminants, when used as a bulb of an incandescent lamp or as an envelope in an arc vessel of a discharge lamp, is a quartz glass made of ultra-pure quartz (SiO.sub.2), for example having a purity of 99.99 mol-%, doped with stoichiometric compounds of alkaline earth oxides with boron oxide, optionally also with a small quantity of Al.sub.2 O.sub.3 in an overall quantity of the doping substance of between about 0.05% to 0.8%, by weight.

Abstract: A method and arrangement controls a regulating variable which determines the rotational speed difference of a clutch by selecting a phase with a curve of the regulating variable specified by a time function during a transient clutch condition. The beginning and the end of this phase are fixed by one or two influencing variables which are specific to the vehicle. One of the influencing variables is determined by the accelerator pedal actuation and another variable is determined by the clutch temperature.

Abstract: The present invention provides a process for the production of polymers with an optical position in diagram where refraction index n.sub.D is plotted against optical dispension v.sub.D expedient for an optical use by metathetic counterion exchange, wherein, in a polymer of the general formula: ##STR1## R.sub.1 and R.sub.2, which can be the same or different, are divalent organic radicals, R.sub.3 and R.sub.4, which can be the same or different, are monovalent organic radicals, n is a whole number greater than 2 and y is 0 or 1. R.sub.1, R.sub.2, R.sub.3, R.sub.4, y and n are so chosen that together they form a polymeric basic structure which promotes glass formation and prevents crystallisation, and X.sup.- is a halogen atom. The halogen ion is replaced by an equivalent of a mono- or polyvalent organic or inorganic counterion different from the halogen ion and suitable for the adjustment of the desired solid body properties.

Abstract: An automatic selector device for multi-gear change-speed gearbox includes a multi-way valve which can be driven into several valve positions each associated with one gear by a stepper motor whose operation depends on an electronic control unit. Each of the valve positions causes the appropriate gear to be selected. The multi-way valve is connected kinematically to a selector unit which can be actuated manually in order to block gears through the intermediary of a stop and an opposing stop.

Abstract: A pressure supply to an automatic selector device of a change-speed gearbox, controls working pressure via a multi-path valve device. The working pressure is supplied either only to clutch actuators of two drive clutches located in the force path before the change-speed gearbox or to selector actuators for the actuation of selector clutches producing the force path within the change-speed gearbox. The clutch actuator of one drive clutch is subjected to a load-dependent main pressure in the latter case.

Abstract: An automatic selector device for a multi-gear change-speed gearbox permits selection of the gears by a respective gear apparatus, e.g., clutch or brake, which is actuated by a selector actuator. The operating pressure of the selector actuator is switched on and off in each case by a selector valve. The selector valves are connected to a multi-path control valve for actuation by way of a control pressure force, and the control valve is actuated by an electromotive valve actuator whose operation depends on an electronic control unit.

Abstract: A pressure medium actuated friction clutch with axially movable friction discs is engaged by at least one engagement spring and by an engagement actuator, and can be disengaged by a disengagement actuator In the steady-state engaged condition, only the spring force is effective.

Abstract: An axial piston-type servomotor uses control connections on the working cylinder and corresponding control edges on the working piston, together with selector valve apparatus for controlling the working piston into a central stroke position.

Abstract: A method and apparatus is provided for automatic shifting of a multi-path, toothed-wheel gear change box with at least two gearbox subunits in parallel to one another in the power transmission path between an input shaft and an output shaft and having loose wheels which can be coupled to their shaft in each case by a gearwheel clutch. A starting shift condition is selected if the vehicle is at a standstill, in which condition both the gearwheel clutch connected to the loose wheel of the gearwheel stage of the reverse gear and the gearwheel clutch of that gearwheel stage which forms the lowest of the gears, which are independent of the power-shift clutch of the gearbox subunit with the gearwheel stage of the reverse gear, are engaged.

Abstract: A method for the automatic shifting of a multi-path toothed-wheel gear change box between two gears which are formed in a first gearbox subunit temporarily engages a middle gear formed in a second, parallel gearbox subunit. It is simultaneously ensured, by control of the working pressures for actuating the power-shift clutches connecting the gearbox subunits to the input shaft, that the speed characteristic of the input shaft shifting is essentially steady without remaining at the middle gear speed value.

Abstract: An IFF system comprises an interrogation device having an antenna arrangement operating in the HF or microwave range with a relatively broad radiation characteristic for radiation of coded interrogation pulses and for receiving answer signals. The IFF system cooperates with a position finding device whose transmission pulses are radiated by way of a relatively narrow radiation lobe and wherein the answer signals are triggered in the answering device in response to the arrival of transmission pulses of the position finding device.

Abstract: A method of accurate friend-foe recognition on the basis of secondary radar through the provision additional special information in both the interrogation device and the responsor device during the formation of their respective signals. This additional information is solely practical and valid for the respective responsor device undergoing interrogation so that the answering signals provided are valued as answers coming from a friend-responsor device. Additional steps of utilizing the time position of the additional information and the uniqueness of such information with respect to a simultaneously available great number of responses makes it still more difficult for a foe-responsor to pass itself off as a counterfeit friend-responsor.

Abstract: An airport-surveillance system for determining the position and identification of aircraft (4) on the airfield which utilizes secondary radar and includes an interrogation station (1) installed on the airfield (3) and from which the interrogation signal is transmitted by way of a narrow sharply forcused beam of an antenna which scans the airfield and further includes transponding stations installed in the aircraft (4). The present invention provides accurate identification and location of the aircraft by utilizing a receiver which has a sharply focused antenna beam and which is geographically located a distance away from the interrogation antenna and wherein the replies from the transponder of the aircraft are received by the receiving antenna only when the interrogation and receiving antenna beams (2, 22) intersect. By scanning all locations of the airport, the position and identification of all aircraft on the airport can be determined.

Abstract: An arrangement for use on a vehicle, especially truck for transporting portable bridges, with the sections of a portable bridge being adapted to be arranged one above the other on support frames, and being adapted to be received on the support frames, by means of a bridge placing apparatus. The support frames are distributed over the effective length, behind the cab of the particular truck, and secured to the frame or the like thereof. The support frames are provided as independent components, releasably securable to the vehicle frame or to a loading platform, and the support frame immediately adjacent the cab is provided with a pivot drive arrangement for moving the sections of the portable bridge in the longitudinal direction of the vehicle.