Abstract: A plug-in device which has a blocking sleeve, which divides the plug-in operation between the plug and the socket into two path sections. In a first path section, before the electrical contact is established, explosion-proof encapsulation of the plug and the socket is brought about. The plug and the socket are initially temporarily locked in this position and further insertion is blocked. Further insertion is not enabled until the sleeve is rotated relative to the socket housing and the plug housing. Once this has occurred, the second path section can be run through, in which the electrical contact is established.

Abstract: A multi-position rotary switch comprises a plurality of identical switch chamber modules that are arranged one next to the other. Each switch chamber module holds a separate line switch allocated to a respective circuit. A standalone actuator housing holds a catch assembly for a switch shaft, which is coupled with a cam slide by means of a gear drive. The cam slide is located between a block like arrangement of switch chamber modules and the housing for the activation mechanism, which is designed for a standard configuration with three switch chamber modules connected to each other. The electrical terminals of the multi-position rotary switch are located on a narrow sides of the individual switch chamber modules.

Abstract: A multi-position rotary switch comprises a plurality of identical switch chamber modules that are arranged one next to the other. Each switch chamber module holds a separate line switch allocated to a respective circuit. A standalone actuator housing holds a catch assembly for a switch shaft, which is coupled with a cam slide by means of a gear drive. The cam slide is located between a block like arrangement of switch chamber modules and the housing for the activation mechanism, which is designed for a standard configuration with three switch chamber modules connected to each other. The electrical terminals of the multi-position rotary switch are located on a narrow sides of the individual switch chamber modules.

Abstract: In a plastic housing of the "Flameproof Enclosure" ignition protection type, one part of the housing is provided at the parting plane with a rib (31) and the other housing part is provided with a groove complementary thereto. The cross-sectional dimensions of the groove are larger than the cross-sectional dimensions of the rib (31). The gap-like space obtained thereby is filled with a coating which adheres integrally either to the rib (31) or to the walls (14, 15) of the groove (13). This gives rise, between the coating and the other part to which it does not adhere integrally, to a gap which meets the requirement placed on an "ex-gap" of a flameproof housing.

Abstract: In a metal housing of the "Flameproof Enclosure" ignition protection type, one part of the housing is provided at the parting plane with a rib and the other housing part is provided with a groove complementary thereto. The cross-sectional dimensions of the groove are larger than the cross-sectional dimensions of the rib. The gap-like space obtained thereby is filled with a coating which adheres integrally either to the rib or to the walls of the groove. This gives rise, between the coating and the other part to which it does not adhere integrally, to a gap which meets the requirement placed on an "ex-gap" of a flameproof housing.