Abstract: A movable and a stationary contact element are tubularly structured for the purpose of axially discharging arc gases. A blast nozzle is associated in a fixed reference position with respect to one of the contact elements. A narrowest location or throat of the blast nozzle is positioned forwardly of the end of this one contact element and is closed by the other contact element in the cut-on position of the gas-blast switch. An inlet of the blast nozzle communicates with a pump space bounded by a cylinder and a piston. The contact element with which the blast nozzle is associated displaceably extends through the piston. The pump space can be pressurized during a cut-off stroke. Both of the contact elements are provided with related outlets in their related regions which are remote from the free ends of the contact elements. At least in the cut-off position the outlets interconnect an interior space formed in the related contact element and a blow-out space.

Abstract: A stationary contact element and a movable contact element are coupled to a drive unit. The movable contact element is surrounded by a co-movable blast nozzle which has an inlet flow communicating with a pump chamber surrounded by a pump cylinder. The pump cylinder is conjointly movable with the blast nozzle and the pump chamber contains an extinguishing gas which is pressurizable during a cut-off stroke. The pump chamber is bounded by the blast nozzle at one of its ends and by a spring-biased pump piston at its opposite end which is displaceable to a limited extent when the pressure in the pump chamber increases. A shock absorber is operatively associated with the spring-biased pump piston. To effectively attenuate the high-frequency pressure peaks generated by the switching arc and retroacting into the pump chamber the shock absorber and the spring biasing or supporting the pump piston are arranged such that the shock absorber only responds at the end of the stroke of the spring supporting the pump piston.

Abstract: A gas-blast switch or circuit-interrupter contains a fixed set of contacts and a movable set of contacts. Each contact set possesses an arc contact and a rated current contact coaxially surrounding the related arc contact. Operatively associated and co-movable with the movable contact set is a blast nozzle which surrounds the arc contact of such movable contact set. In the cut-on position the blast nozzle is closed by the fixed arc contact and is operatively connected with a pressure chamber which can be pressurized during a cut-off stroke. At the outflow end of at least one of the arc contacts there are arranged means in order to axially and outwardly deflect the switching gas flowing-out of such end during the cut-off stroke.

Abstract: A movable contact element is surrounded by a co-movable blast nozzle which in the cut-on position is closed by a stationary contact element which is in engagement with the movable contact element. At its inlet side the blast nozzle is flow connected with a pump chamber or compartment which can be pressurized during the cut-off stroke. This pump chamber is constructed in a jacket or shell chamber-like fashion and bounded by an inner cylinder and an outer cylinder. The inner cylinder carries the movable contact element and the outer cylinder carries the blast nozzle. Both cylinders are displaceable by means of a stationarily supported pump piston. In order to prevent any obstruction to the flow of the extinguishing gas which is effluxing out of the pump chamber during the cut-off stroke, both of the cylinders are solely connected with one another at their ends facing away from the blast nozzle by means of a substantially ring-shaped floor member which is preferably formed at both cylinders.

Abstract: A gas-blast switch having a movable contact element and a stationary contact element and a blast nozzle operatively associated with one of the contact elements and surrounding the same. The blast nozzle, during the course of the cut-off stroke of the gas-blast switch, is connected with a pump chamber or compartment which can be placed under pressure. The nozzle chamber is constituted by an inlet space converging towards the nozzle throat and an outlet space diverging away from such throat. In the blast nozzle there are additionally formed channels which flow communicate with the pump chamber. These channels open at an angle with respect to the nozzle axis into the nozzle chamber in order to additionally cause a blowing of the arc transversely in addition to the axial blowing of the arc in the blast nozzle.