Abstract: An inverter type drive unit for feeding AC electric power of variable parameters to an electric motor comprises an electronic control section (40), a power converting and an output section comprising one or more identical power modules (11a-c), each forming a complete 3-phase output stage and arranged in a side-by-side disposition in a multiplying direction (A) and clamped by means of retaining devices (14a-c) to a cooling structure (10), wherein the power modules (11a-c) are connected in parallel to DC input terminals (25, 26) and to AC output terminals (32, 33, 34) via conductive sheets (20, 21, 27a-c), whereof the DC connected sheets (20, 21) cover substantially the entire physical surface area covered by the power modules (11a-c) so as to accomplish an even, simultaneous and low impedance DC current supply to all power modules (11a-c).

Abstract: Arrangement for preventing rattling caused by a synchronizing ring [(36)] for an unengaged gear in a synchronized gearbox. When the gear is not engaged, its synchronizing ring is arranged for limited rotation relative to a hub arranged non-rotatably on a shaft [(6)] and relative to a synchronizing sleeve which is movable axially on that hub. Radially acting plate spring elements [(50)] are incorporated with prestress in the arcuate space [(45)] between an outer surface [(46)] of the synchronizing ring [(36)] and an inside surface [(48)] of the ridged rim [(34)] of the synchronizing hub. The plate spring elements [(50)] cooperate with the synchronizing ring [(36)] to hold the synchronizing ring in a position of suspension relative to the synchronizing hub [(10)] and thereby prevent it being rotated between its end positions and causing rattling.

Abstract: A mechanism assembly for a practice mine, comprising a mine body (1) being mounted thereon a housing (3) which incorporates an axially movable and axially rotatable arming plunger (4) which can be manually depressed from outside the mine in a manner to produce an arming movement which simulates a desired arming function of the mine. The mechanism assembly incorporates a release plunger (13) which can be depressed manually from outside the mine and which is arranged for operative co-action via a catch plate (7) and a locking device (16) with the arming plunger in a manner to influence the arming movement of the arming plunger.