Abstract: An electric switch includes a thermal tripping unit which, when a thermal budget acting on it is exceeded, trips and switches off the electric switch. In an embodiment, the tripping unit includes an adjustment module which, as a function of an accessory connected to the electric switch, uses an actuating element to set a tripping element of the thermal tripping unit such that the heat effect of the accessory is compensated for in the event of tripping.

Abstract: An electric switch includes a thermal tripping unit which, when a thermal budget acting on it is exceeded, trips and switches off the electric switch. In an embodiment, the tripping unit includes an adjustment module which, as a function of an accessory connected to the electric switch, uses an actuating element to set a tripping element of the thermal tripping unit such that the heat effect of the accessory is compensated for in the event of tripping.

Abstract: A switching device is disclosed, in particular an electrical circuit breaker, including a housing and a switching unit disposed inside the housing. In at least one embodiment, the housing includes an openable housing cover with a switching opening through which a control lever head, which can be moved between an on-position and an off-position, of a control lever for switching the switching unit projects. The switching opening includes an opening contour and the control lever head includes an outer contour, which are aligned with one another such that the control lever head in the on-position prevents any movement of the housing cover via the control lever head, and in the off-position permits a movement of the housing cover via the control lever head.

Abstract: A switching device is disclosed, in particular an electrical circuit breaker, including a housing and a switching unit disposed inside the housing. In at least one embodiment, the housing includes an openable housing cover with a switching opening through which a control lever head, which can be moved between an on-position and an off-position, of a control lever for switching the switching unit projects. The switching opening includes an opening contour and the control lever head includes an outer contour, which are aligned with one another such that the control lever head in the on-position prevents any movement of the housing cover via the control lever head, and in the off-position permits a movement of the housing cover via the control lever head.

Abstract: A variable high-current resistor, especially for use as a protective element in power switching technology has already been proposed, which contains carbon as a resistance material, at least one boundary layer with a transition zone to another electric conductor being provided. By applying a contact pressure, the resistance in the transition zone can be kept low. Under the prior art, the resistance is converted into a highly resistive state by means of Joulean heat. In accordance with the invention, the contact pressure of the variable high-current resistor is able to be selectively influenced, the carbon- and/or carbon-black-containing layer being pressed by the surface pressure with a preset first value against the other conductor to adjust the low-resistance state of the resistor, and that, in the event of a short-circuit, this contact pressure being able to be reduced in a short enough time to a second value, at which the resistance in the transition zone goes up by at least two orders of magnitude.

Abstract: In an apparatus for generating clamping force in injection molding machines having stationary and moving platens, between which an injection molding die is mounted, and a traversing mechanism associated with the moving platen for opening and closing of the injection molding die, the present invention provides means for locking the traversing mechanism after the molding die has been closed. The clamping force required during injection is generated by at least one element made of a magnetostrictive material that is mounted between the traversing mechanism and the moving platen. Each magnetostrictive element is surrounded by a magnetic coil that is controllably energized to produce an alternating magnetic field which causes elongation of the associated element, generating the clamping force.

Abstract: A standard injection molding machine is combined with an auxiliary plasticizing unit having a hot runner manifold that can be alternately connected with or disconnected from the main injection unit of the molding machine to perform sandwich molding. The injection unit retracts from the mold to connect with a hot runner and receive skin material from a non-reciprocating screw extruder directly into the barrel of the injection unit. The injection unit then disconnects from the hot runner and moves back into position for injection into the mold. Simultaneously with this movement, the injection unit plasticizes sufficient core material to complete the stacked arrangement of skin and core material necessary for sandwich molding. In an alternate embodiment, the sandwich molding apparatus includes an accumulator with a suitable valve and connections to the other components to supply a final shot of skin material into the mold, as well as provide the pack and hold functions of the injection cycle.

Abstract: An injection unit (1) for injection molding machines used in the manufacture of plastic objects has a nozzle element (2), a material feed system (7), a cylinder-piston unit (3, 4) arranged between the nozzle element (2) and the material feed system (7), a valve (10) arranged between the cylinder (4) and the material feed system (7), and a device (21) for pressing the nozzle element (2) to the edge of the gate of an injection mold. The nozzle element (2), and the piston (3) guided in the cylinder (4), may be integrally formed. The nozzle element has a channel (11) in alignment with an axial bore (13) in the piston (3). The channel (11) and bore (13) are in communication with the interior of the cylinder. The cylinder (4) can be moved in the direction of the longitudinal axis of the piston while the piston (3) does not move.