Abstract: A process for the production of a catalyst system is described. For this purpose, at least one alkali metal alcoholate is introduced into a lactam melt and the resulting alcohol is removed. The resulting catalyst system is used for the production of cast nylon.

Abstract: An actuation system includes: two hydraulic actuators, each being coupled to a load-bearing structural component and to an elevator, and displaceable relative to the load-bearing structural component for the operation of the elevator; a first control valve device to control the first actuator; a second control valve device to control the second actuator; a control and monitoring unit that determines and transmits appropriate command signals to the control valve devices to execute appropriate control movements for the operation of the actuators; a locking device coupled to the first actuator to secure the first actuator a locked state, which is hydraulically connected with the first hydraulic system and the second hydraulic system via an hydraulic OR-circuit, where in normal operation the locking mechanism is in its unlocked state, and in the event of a failure of both hydraulic systems the locking mechanism secures the first actuator.

Abstract: An actuation system for a hydraulically operable aircraft elevator, includes: two actuators, supplied from at least one hydraulic supply system, of which each is coupled to a load-bearing structural component, and to an elevator, displaceable relative to the load-bearing structural component, for the operation of the elevator, a first control valve device, hydraulically connected to the first actuator to control the latter, and a second control valve device, hydraulically connected to the second actuator to control the latter, which devices are respectively supplied from an hydraulic system, a control and monitoring unit functionally connected with the control valve devices, which determines appropriate command signals for the control valve devices and transmits the signals to the latter to execute appropriate control movements for the operation of the actuators, a locking device, coupled to the first actuator, with a locking mechanism to secure the extended position of the pushrod of the first actuator in it

Abstract: A friction lining plate for a wet-running frictional shift element that can rotate in the assembled condition with no preferred rotation direction, with at least one annular disk-like friction surface that serves for frictional engagement, having grooves through which coolant can flow. The grooves form two overlapping groove sets. Each groove of the first groove set extends at a first angle inclined obliquely to the radial direction and backward relative to a first rotation direction. Each groove of the second groove set extends at a second angle inclined obliquely to the radial direction and forward relative to a first rotation direction. Each groove of the second groove set intersects a groove of the first set in such manner that a groove intersection point is located at the inside diameter of the friction surface or a groove intersection point is located at the outside diameter of the friction surface.

Abstract: A friction lining plate for a wet-running frictional shift element that can rotate in the assembled condition with no preferred rotation direction, with at least one annular disk-like friction surface that serves for frictional engagement, having grooves through which coolant can flow. The grooves form two overlapping groove sets. Each groove of the first groove set extends at a first angle inclined obliquely to the radial direction and backward relative to a first rotation direction. Each groove of the second groove set extends at a second angle inclined obliquely to the radial direction and forward relative to a first rotation direction. Each groove of the second groove set intersects a groove of the first set in such manner that a groove intersection point is located at the inside diameter of the friction surface or a groove intersection point is located at the outside diameter of the friction surface.