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.

Abstract: A gas-blast switch possessing a fixed contact and a movable contact and a blast or discharge nozzle surrounding one of the contacts, the blast nozzle having its inlet connected with the outlet of a pump compartment for an extinguishing gas, this pump compartment can be pressurized by the switch cut-off or switching-off movement, and wherein the narrowest location or throat of the blast nozzle is arranged in the direction of blowing downstream with respect to the aforementioned one contact. The outlet of the pump compartment can be closed by a check or nonreturn valve which closes in the direction of the pump compartment. The inlet of the blast nozzle is connected via a gas chamber with the outlet of the pump compartment, the outlet of the gas chamber confronting the blast nozzle can be closed by means of a further check or nonreturn valve which closes in the direction of the gas chamber.