A multistage digital switching network for use in telecommunications has two identical subnetworks. Each of the subnetworks consists of three modules which are connected in series. In one embodiment, the subnetworks are connected through additional modules identical to the middle module of the series of the subnetworks. In another embodiment, otherwise unused outputs of the middle modules of the subnetworks are used for the connections between the subnetworks.

A compressed air supply system for vibro-isolated tools comprises a telescopic-tubular connection between the tool grip and the tool compressed air engine. A cut-off valve is mounted at the inlet to a supply duct through the grip, the outlet of the duct being connected to a pipe of the supply system mounted in the grip by means of an elastic connection. The pipe of the supply system has holes through the wall thereof with increasing diameters which, during motion of the tool housing relative to ...

Vibro-isolation of connections of structural units of hand tools consisting of a vibro-isolator with a constant reaction force is characterized by that on the side of the body /3/ of the compressed-air engine there is an upper /9/ and lower /10/ elastic guide being the first stage of vibro-isolation in the directions /x/ and /y/ perpendicular to the axis of symmetry of the tool, whereas in the main direction /z/ parallel to the axis of symmetry of the tool vibro-isolation is ensured by an elasti...

A multi-cylinder, two- or four-stroke Diesel engine with electronic control, comprising piston-and-crank assembly, electropneumatically or electrohydraulically controlled inlet and exhaust valves, and injectors supplied with fuel under a high pressure, provided with control depending on at least one operational parameter of the engine, characterized in that with the main shaft a digital transducer of the angular velocity (5) is coupled, the transducer being further connected with the first input...