Abstract: A quick-action tensioning device (1) for cable control switches comprises a holding element (2), to which a cable (3) can be fastened in a clamping manner, and a housing (8), which is connected with the holding element (2). According to the invention, devices (9, 10) for a precise adjusting are provided between the housing (8) and the holding element (2). In particular, a nut (10) can be used for the precise adjusting, so that the cable tension can be continuously adjusted, in which case a rough adjustment as well as a precision adjustment can be carried out.

Abstract: A quick-action tensioning device (1) for cable control switches comprises a holding element (2), to which a cable (3) can be fastened in a clamping manner, and a housing (8), which is connected with the holding element (2). According to the invention, devices (9, 10) for a precise adjusting are provided between the housing (8) and the holding element (2). In particular, a nut (10) can be used for the precise adjusting, so that the cable tension can be continuously adjusted, in which case a rough adjustment as well as a precision adjustment can be carried out.

Abstract: A safety switch includes a switch housing which accommodates a switch as well as mechanical and electrical and electronic components, and a head portion securable to an end face of the switch housing in several predetermined angular positions and accommodating a mechanical switching element e.g. a switching wheel which is operated by an actuator. A rigid positioning element is detachably secured to the switch housing and formed with a safety member, whereby the positioning element is adjustable between a locked position in which the safety member is positively engaged in the head portion and an idle position in which the safety member is disengaged from the head portion for allowing a rotation and re-positioning of the head portion relative to the switch housing.

Abstract: A safety switch assembly as part of a protective screen by which a motor-driven machine is enclosed includes a locking unit for allowing opening of the protective screen for access to the machine only after all moving motor parts are at a standstill, and a plunger which actuates an electric switch for cutting the electric supply to the machine. The plunger is linked to a control member which is moved by the plunger in response to a key insertable into a housing by which the safety switch assembly is fully enclosed. The locking unit includes a locking lever which is actuated by an electromagnetically actuatable locking mechanism to engage and immobilize the control member with the electric switch being actuated by the control member.