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US 3,955,057 AGranted
Electric switch
AssigneeBrown, Boveri & Cie AG
InventorsFriedhelm Dabringhausen, Heinrich Neumaier
Life of this patent
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AssigneeBrown, Boveri & Cie AG
InventorsFriedhelm Dabringhausen, Heinrich Neumaier
Estimating the term…
Electric switch includes a fixed contact member and a movable contact member movable from a position wherein it is in contact with the fixed contact member to a position wherein it is spaced therefrom, one of the members having a nozzle-like inner channel, a blast piston-cylinder assembly surrounding the contact members in the contact position thereof wherein the switch is in switched-on condition, the cylinder and the piston being displaceable relatively toward one another in the switched-on condition of the switch so as to compress a gas received in the space between the piston and the cylinder, the fixed and movable contact member in the spaced position thereof, during switch-off of the switch, having an arc therebetween, the arc being blown by an extinguishing flow through the nozzle-like inner channel of the gas compressed by the piston and cylinder assembly, the piston having a base secured to the movable contact member drive means for substantially uniformly actuating on the cylinder, the compressive force of the compressed gas on the piston base driving the movable contact member into switched-OFF position of the switch, and means located between the cylinder and the movable contact member for controlling the course of travel of the movable contact member relative to that of the cylinder.
Electric switch comprising a fixed contact member and a movable contact member movable from a position wherein it is in contact with said fixed contact member to a position wherein it is spaced therefrom, one of said members having a nozzle-like inner channel, a blast piston-cylinder assembly surrounding said contact members in said contact position thereof wherein the switch is in switched-on condition, said cylinder and said piston being displaceable relatively toward one another in said switched-on condition of the switch so as to compress a gas received in the space between said piston and said cylinder, said fixed and movable contact members in said spaced position thereof, during switch-off of the switch, having an arc therebetween, said arc being blown by an extinguishing flow through said nozzle-like inner channel of the gas compressed by said piston and cylinder assembly, said piston having a base secured to said movable contact member drive means for substantially uniformly actuating only said cylinder, the compressive force of the compressed gas on said piston base driving said movable contact member into switched-OFF position of the switch, and means located between said cylinder and said movable contact member for controlling the course of travel of said movable contact member relative to that of said cylinder.
Dependencies are inferred from the claim text.