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: A pool including a wall having a top end and a wall profile, and a reinforcing system for reinforcing the wall. The reinforcing system includes a plurality of top caps attached to the top end of the wall. Each top cap includes a shell body with a peripheral surface and at least one internal truss member such that each top cap is laterally flexible.

Abstract: A pool including a wall having a top end and a wall profile, and a reinforcing system for reinforcing the wall. The reinforcing system includes a plurality of top caps attached to the top end of the wall. Each top cap includes a shell body with a peripheral surface and at least one internal truss member such that each top cap is laterally flexible.

Abstract: A step for ingress and egress from a swimming pool and/or a spa includes a tread including opposing side edges, a riser coupled with and extending substantially perpendicular from one of the side edges of the tread and an upper flange substantially perpendicular to said tread and coupled with and extending upwardly or downwardly from one of the opposing side edges of the tread opposite the riser. The upper flange is configured to be coupled with the riser of another step or a wall of the swimming pool or spa to form a stairway.

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: A step for ingress and egress from a swimming pool and/or a spa includes a tread including opposing side edges, a riser coupled with and extending substantially perpendicular from one of the side edges of the tread and an upper flange substantially perpendicular to said tread and coupled with and extending upwardly or downwardly from one of the opposing side edges of the tread opposite the riser. The upper flange is configured to be coupled with the riser of another step or a wall of the swimming pool or spa to form a stairway.

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.

Abstract: A lid support bracket assembly for supporting a pool cover box lid includes a wall mount and a bracket angularly adjustably coupled to the wall mount.

Abstract: An equipment mounting assembly for mounting equipment in a pool cover box is provided, including at least one positioning feature configured to engage at least two walls of the pool cover box and at least one mounting plate, the at least one positioning feature adjustably connected to the mounting plate.

Abstract: An equipment mounting assembly for mounting equipment in a pool cover box is provided, including at least one positioning feature configured to engage at least two walls of the pool cover box and at least one mounting plate, the at least one positioning feature adjustably connected to the mounting plate.

Abstract: A pool cover box assembly for housing a swimming pool cover installed at an end of a swimming pool having a first facia positioned along at least one edge of the swimming pool, including a plurality of vertical walls, including a rear wall, a lid having a front edge and a rear edge, the rear edge being removably engaged with the rear wall, and a second facia connected with the front edge of the lid, the second facia being complimentary in shape with the first facia, an end of the second facia in substantial alignment with an end of the first facia.

Abstract: A lid support bracket assembly for supporting a pool cover box lid includes a wall mount and a bracket angularly adjustably coupled to the wall mount.

Abstract: A swimming pool has a plurality of walls with a pair of side walls on opposite sides of the pool. The plurality of walls define a target water level within the swimming pool. A pair of tracks are respectively associated with each side wall and positioned above the target water level. A cover includes a pair of longitudinal side edges, with each side edge carried by a corresponding track. The cover includes at least one gas vent along each side edge and above the target water level.

Abstract: An automatic pool cover box assembly includes a plurality of vertical walls and a lid. Each vertical wall has a top surface, including a rear wall and a front wall, the top surface of the rear wall defining a horizontal plane. The top surface of the front wall is disposed below and substantially parallel to the horizontal plane. The lid has a rear edge and an opposite front edge, the lid being substantially coplanar with the horizontal plane, the rear edge being connected to the rear wall.

Abstract: A swimming pool includes a first end wall, a second end wall and a pair of side walls. A cover box is positioned adjacent to the first end wall. A coping is positioned at the top of the side walls and the second end wall. The coping includes a cover track slot. A leading edge bar is associated with the cover track slot and is movable between positions adjacent the first end wall and the second end wall. The leading edge bar includes a nose which fits into the cover track slot of the second end wall when the leading edge bar is adjacent to the second end wall.

Abstract: An end cap coping for a swimming pool of sufficiently low profile to allow a pool cover to be extended thereover. The end cap coping includes a body having a channel with holes in a bottom thereof for receiving fasteners extending in to a wall of the pool. An enlarged edge of the body includes a slot for retaining a bead of a liner for the pool. The end cap coping is positioned above a target water level for the pool, but below tracks supporting a cover of the pool. A cover is provided for the channel.

Abstract: A safety system for an automatic swimming pool cover having a cover and a cover drive for extending and retracting the cover, the safety system having at least one sensor for detecting the presence of a heat generating body in the pool and for generating a signal in response thereto; and a controller receiving said signal and activating a safety protocol in response to the at least one sensor detecting the presence of a heat generating body.

Abstract: A pool cover box lid edge support, includes a base and a facia connected together. At least the base or the facia is connectable with and provides vertical support to an edge of a pool cover box lid.