Abstract: A quick-fastening element (10) is used to anchor loads to profile rails (12a, 12b). It has a mounting part (18), a cage (20), and a movable closing nut (22). To improve the screwing-in motion and to enable more universal use of the quick-fastening element, it is proposed that a first spring element (24) is provided between the closing nut (22) and the mounting part (18), and a second spring element (26) is provided between the end of the cage (20) and the closing nut (22), and the closing nut (22) is in a position of equilibrium.

Abstract: A quick-fastening element (10) is used to anchor loads to profile rails (12a, 12b). It has a mounting part (18), a cage (20), and a movable closing nut (22). To improve the screwing-in motion and to enable more universal use of the quick-fastening element, it is proposed that a first spring element (24) is provided between the closing nut (22) and the mounting part (18), and a second spring element (26) is provided between the end of the cage (20) and the closing nut (22), and the closing nut (22) is in a position of equilibrium.

Abstract: The mountable contact element (1) for making an electrical contact with an external electrically conductive coating (22) on a nonconductive tube (20) on which the contact element is secured includes two contact rings (3,4) spaced axially from each other and each provided with interiorly extending contact brushes (5,6) peripherally encompassing the electrically conductive coating (22) and three axially extending ribs (7,8,9) spaced 120° C. from each other connecting the contact rings (3,4) mechanically and electrically conductively with each other and holding them spaced apart axially. The axially extending ribs (7,8,9) are connected to each other at a common connection point (10) on a threaded bolt (11). An ozonizer including the nonconductive tube (20) with the external electrically conductive coating (22) acting as a first electrode, a second external electrode separated from the first electrode with a dielectric and the contact element (1) is also described.

Abstract: A single rod measuring probe has a hollow probe portion which contains an electrolyte solution and an electrical connector plug. The hollow probe portion and electrical connector plug are joined by a refill unit which receives the probe portion and plug in opposite ends thereof. The refill unit includes a lateral opening for filling the probe portion with electrolyte solution and a slidable cover for closing the opening. The slidable cover includes an elastic seal which seals the lateral opening when the cover is over the lateral opening. Preferably, the refill unit is non-circular in cross-section to facilitate venting.