"The idea that cavalry will be replaced by these iron coaches is absurd. It is little short of treasonous."
|7417520||Contactor for direct current and alternating current operation|
The invention relates to a contactor for direct current and alternating current operation with at least one contact point with a fixed contact and a movable contact, at least one permanent magnet, arranged adjacent to the contact point, for the generation of a perma...
An electric switch has an arc interrupter mounted in a housing between two main conductors. The interrupter comprises a fixed contact having a first arcing surface, a fixed electrode having a second arcing surface, an arc-driving coil and a movable contac...
|4376271||Polarized DC contactors|
Means for causing the properly-polarized one of a pair of series-connected DC contactors to open before the other, depending upon the direction of load current flow. Load current is caused to link the magnetic circuit constituted by a contactor coil, fram...
A pair of switches are disposed adjacent one another in a housing which contains the highly insulating gas sulphur hexafluoride. In a closed position of each switch, a pivotable contact arm engages fixed contact fingers to permit the flow of load current ...
On opening of a circuit breaker, an end portion of a pivotable contact arm disengages from fixed contacts such that an arc is drawn therebetween radially across the pole face of a field coil, the end portion of the contact arm moving transversely to the f...
A circuit interrupter consisting of a pair of contacts being relatively movable to be detachable in an arc extinct chamber filled with a fluid for arc extinction is disclosed. Also included are a chamber for storing the fluid pressurized in an arc space i...