Abstract: A gas-blast switch having a housing composed of a hollow insulator body. Within such housing there are arranged a set of fixed contacts and a set of movable contacts surrounded by a blast chamber as well as a blast nozzle operatively associated with the set of movable contacts. The blast nozzle is connected with a pump device. This pump device comprises a pump cylinder movable in conjunction with the movable contact set. The pump cylinder coacts with a stationary pump piston. In the pump chamber or compartment defined by the pump cylinder there merges a nonreturn or check valve which opens towards such pump chamber. By means of such nonreturn valve there is sucked-up pressurized extinguishing gas during the course of the cut-on switching-on stroke of the gas-blast switch. The pump chamber is connected by means of this nonreturn valve with a supply compartment which, in turn, communicates by means of labyrinth-like extending flow paths with the blast chamber.

Abstract: A movable, substantially tubular-shaped contact element coacts with a fixed set of contacts which, in turn, possesses a rim of rated current contacts, a burn-off rim electrically connected with the rated current contacts, and an intermediate electrode arranged electrically insulated from the rated current contacts. In order to prevent, during the cut-off operation, commutation of the base point of the arc from the burn-off rim back to the contact surfaces of the rated current contacts, the burn-off rim is arranged within the rim of rated current contacts and inwardly offset with respect to their contact surfaces. In the cut-on position the burn-off rim surrounds a burn-off tip secured at the end of the movable contact element. The burn-off tip engages with the intermediate electrode. Between the contact surfaces of the rated current contacts and the burn-off rim there can be arranged an insert formed of a material which, in the presence of an arc, gives off a gas.

Abstract: Within a gas tight insulating housing of a gas-blast switch there are arranged a fixed contact surrounded by a blast chamber, a movable contact and a blast nozzle movable together with said movable contact. The blast nozzle is connected to a pump device containing a pump cylinder movable along with the movable contact. The pump cylinder is displaceable upon a stationary piston. Means are coupled with the pump cylinder and which means, during the course of the cut-off stroke of the gas-blast switch, are impinged by the extinguishing or quenching gas heated by the arc and augment the operation of the pump device, and thus, the cut-off movement. The means coupled with the pump cylinder incorporate an impact plate which bridges the substantially jacket or shell-shaped blast chamber between the pump cylinder and the inner wall of the insulating housing preferably up to the region of a ring-shaped or annular gap.

Abstract: A bimetallic thermo-release, especially for protective motor switches, comprising at least one bimetallic release element connected with connections for the connection of electrical lines or conductors. The bimetallic thermo-release having a bimetallic compensation element for temperature compensation and a release or trigger element which can be activated as a function of the bending or deflection of the bimetallic release element and the bimetallic compensation element. A heat-conducting connection is provided between the bimetallic compensation element and at least one connection at which there is connected one of the electrical lines.

Abstract: A surge diverter connected between a conductor and ground comprising several spark-quenching gaps, voltage-controlled shunting resistors connected in series with these gaps and voltage controlled control-resistors, each connected in parallel either to a gap alone or to a unit formed by a gap and a shunting resistor in series with the latter. The voltage-controlled control-resistors have current-voltage characteristics with substantially the same steepness, while the resistance value of these control-resistors at the rated voltage increases sequentially from the conductor to grand.

Abstract: A vacuum switch incorporating two contact elements arranged in an evacuated housing, the contact elements being in contact with one another in the closed condition of the switch and being separable from one another for cutting-off the current. As to the two contact elements at least one is movable in one direction. At least the movable contact element is secured to a support element which is movably guided in the direction of movement of such contact element and possesses a current terminal separate from the support element.

Abstract: Electric insulators are prepared from a mixture of a curable carrier reaction resin, a hardener for the carrier reaction resin and a filler which is a ground, hardened filler reaction resin. The insulators are advantageously used in electric devices containing an electronegative gas.

Abstract: A circuit arrangement in an electrical device which contains a load which can be supplied with a direct-current voltage of lesser quality and electronic components which can be supplied with a direct-current voltage of greater quality, especially in a timing relay for supplying the device with energy from an alternating-current network by means of a transformer or voltage divider connectable with the alternating-current network and a subsequently connected rectifier arrangement. The rectifier arrangement connected after the transformer has an output at which there are connected a first supply branch and via a reverse current barrier a second supply branch containing smoothing means and a voltage stabilizer. The load which is to be supplied with the direct-current voltage of lesser quality is connected at the first supply branch and the electronic components to be supplied with the direct-current voltage of greater quality are connected at the second supply branch.

Abstract: An arc electrode, especially for a contact arrangement in a vacuum switch, comprising electrode plates serving to take-up the arc base points and secured to a contact element. Neighboring electrode plates are arranged in spaced relationship from one another. The electrode plates are provided at least at one of their surfaces with impressed or embossed recesses.

Abstract: A contact arrangement for an electrical switch, especially a vacuum switch, comprising two contact components movable in one direction relative to one another, each contact component possessing two electrically parallelly connected contact elements, and in the closed condition of the switch each such contact element is in contact with the associated contact element of the other contact component. Further, for the common movement of the contact elements of the movable contact component such contact elements are mechanically coupled with one another.

Abstract: An arc electrode, especially for a contact arrangement in a vacuum switch, comprising an essentially hollow cylindrical contact component and electrode elements fixedly connected with the essentially hollow cylindrical contact component and extending into the interior of such contact component, said electrode elements serving for taking-up the base points of the arc. The electrode elements are arranged to extend over the entire axial length of the contact component.

Abstract: A travelling switching block for a metallic encapsulated high-voltage switching installation wherein at or in a switching block housing there are assembled together into a metallic encapsulated insulated and transportable structural unit at least one input duct or throughpassage and one output duct or throughpassage as well as power- and/or disconnector switches and possibly additional quick grounders, voltage converters, current converters and work grounders. At least each duct or throughpassage which extends upwardly in operating position is pivotable by means of an insulating medium tight pivoting mechanism into a transport position producing a smaller transverse profile.

Abstract: A reference value transmitter for a phase clipping or cutting control for starting a squirrel cage-asynchronous motor, comprising a start-up regulator for the upward regulation of a reference value transmitter- output voltage from a start-up voltage value which is constant during a primary start-up phase to a rated voltage value with a predetermined build-up speed during a terminal start-up phase. The start-up regulator is constructed for triggering the terminal start-up phase by means of a command signal and for the start-up regulator there is provided a command transmitter which contains a current measuring device for the motor current and a threshold value or limit indicator connected with the current measuring device for generating the command signal.

Abstract: A gas-blast switch comprising two contact elements which can be brought into and out of engagement with one another, a drive means for actuating at least one of said contact elements, and a pump device consisting of a piston and cylinder actuatable in response to the switching movements of the gas-blast switch. During the cut-off movements of the gas-blast switch the pump device conveys an extinguishing agent out of a pump compartment of the pump device through a nozzle into an extinguishing or blow-out compartment or chamber, the nozzle being constructed to take-up the switching arc existing between the separating contact elements. The piston consists of a plurality of piston portions guided to be relatively displaceable in a gastight fashion within one another and dividing the piston surface confronting the pump compartment, one of the piston portions being positively connected with the drive means.

Abstract: A vacuum switch having a housing within which there are arranged axially oriented switching elements and fixedly mounted sheet metal or plate electrodes, wherein between the axially aligned sheet metal members thereof there are left free gaps or spaces and the confronting electrode end surfaces or faces of which serve to take-up the base points of the arc. According to the invention, within the switch housing there are arranged a number of sheet metal electrodes in the form of a column with oppositely situated electrode end surfaces and the sheet metal electrodes form compartments within the switch housing which are separated from one another by metallic chip or shaving layers present in the individual sheet metal electrodes, and the separation gap of the switching elements extends through the compartments past the height of the electrode column.

Abstract: Encapsulated switching installation with a substantially cylindrical tank which is insulatingly sealed at both ends and a switching device accommodated within the tank, which by means of contacts can be connected to the conductor of throughpassages secured to the tank and actuated by a drive mechanism located externally of the tank.

Abstract: An arcing electrode in accordance with the invention has a number of plates separated by gaps. The plates are shaped with if necessary, additional plates into a receptacle for metal droplets produced by the arc.

Abstract: A circuit arrangement for superposing or impressing starting conditions at an electrical operating means primary simulator composed of RC-elements wherein the primary simulator network is charged by a charging current functionally dependent upon an operating current to a charging voltage representative of the heating-up or thermal behavior of the operating means and the charging voltage appears at a low-ohmic or low-impedance output of a charging state-storage device for controlling an electronic operating means-protection relay.

Abstract: A sample and hold-circuit arrangement for an electrical motor simulator of an electronic motor protection relay wherein the motor simulator is charged by a charging current source with clocked charging currents through a main or primary switch controlled by clock signals. A sample and hold-amplifier containing a storage capacitor and an electronic switching device are connected through the main switch at the motor simulator and the electronic switching device is controlled by the clock signals. The sample and hold-amplifier containing the storage capacitor is electrically connected during the charging cycles to the motor simulator for recharging of the storage capacitor to the charging voltage of the motor simulator and during the rest cycles is electrically disconnected from the motor simulator for the control or triggering of the sample and hold-amplifier by the charging voltage of the recharged storage capacitor.

Abstract: An electrical switch comprising a drive mechanism for moving a switch component at a pre-selected variable speed. A movable additional mass is connected at a drive branched-off the drive mechanism of the moved switch component, said branch drive possessing a transmission ratio which is variable as a function of the position of the moved switch component.BACKGROUND OF THE INVENTIONThe present invention relates to a new and improved construction of an electrical or electric switch having a drive mechanism for moving a switch component at a speed which varies in a pre-selected manner.For instance when separating the contacts of certain switches it can be necessary to displace the moved contact, i.e. the moved switch component at a variable speed in order to take into account the different requirements regarding the cut-off or separation operation e.g. the extinguishing of the arc and the gentle slowing down during as rapid as possible switching operation.