The invention relates to a dedicated-line-free communications system for transmission of speech and/or data information between communications terminals, said terminals being interconnectable within the communications systems through the joint use of the power supply mains. The extension lines (NAL) are separated via hybrid circuits into transmission and reception channels and the speech and/or da...

The invention relates to a dedicated-line-free communications system with transmission of call and dial signalling via the power supply mains. The extension lines (NAL) are connected to the central adapter device (ZAE) and are separated by means of the first hybrid switching device (GS1) into the first transmission channel (SK1) and the second reception channel (EK2). The extension (NST) is connec...

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The heat exchanger has outer surfaces defining limit channels for the heat-absorbing gas, and channels for the heat-transmitting gas. A framework is arranged either in the absorbing or transmitting channels as support for the heat exchange surfaces.

This invention is a device on a parallel screw vice (1) that allows rapid tightening and loosening of two clamping elements (6, 7) movable in relation to one another, whereby a control unit between two clamp units (2, 4) contains a rod (10) along with a number of lock elements (12) connected to the rod, which through actuation by the rod (10) can be moved to and from a lock face (5A) that can inte...

In machinery technology, a locking ring is used for detachable attachment of cogwheels etc. to shafts. Conventional locking rings are mounted concentrically relative to the wheel and shaft and have variable outer and/or inner diameters so that they can be expanded with the aid of wedges, cotter pins etc. to firmly connect the wheel and the shaft together. Such locking rings are however, relativel...

This invention presents a device to stretch or tighten a caterpillar truck's treads so that these neither risk overload and rupture nor risk underload so that they face misalignment or derailing. The device of this invention works each tread's tension wheel (15) through a hydraulic extension cylinder (20) together with two pressure accumulators (30 and 40), of which one (30) drives oil to the cyli...

The machine is mounted on a body (12) of sturdy steel beams, and the diesel engine (1) is fitted on top of the generator (2), the two being attached by fixtures (10), the attachment being rigid so that the alignment of the shafts of the engine and generator or the distance between them cannot be altered. The assembly is fitted with the aid of vibration dampers (8) on longitudinally directed horizo...

The anchor has a weak additional reinforcement (26,27) with a limited extension from a seam section. The reinforcement comes into effect relatively suddenly in the transition area to a reinforcement cable (2).