Magnetic blow-out arc extinguishing device

Magnetic extinction of arcs in switches

Magnetic puffer type gas circuit breaker

Magnetic shielding means for a current sensor of direct current

Magnetic-blast arc extinguishing device having permanent magnets

Magnetically driven ring arc runner for circuit interrupter

Magnetizing current switch

Make before break electrical switch

Manual and motor operated circuit breaker

Manually operated electrical switch

Material for electric contacts having arc-quenching properties

Material for electrical devices having a flexible member

Means for assembling two enclosures of an electrical cutout appa

Means for attaching auxiliary devices to a membrane switch

Means for detecting a loss of vacuum in vacuum-type circuit inte

Means for effectively controlling the forces imposed on the mova

Means for manually slow-closing a circuit breaker that has a spr

Means for mounting membrane switches to cathode ray tubes

Means for operating blast valve in two-pressure circuit breaker

Means for recycling liquified insulating gas in a gas insulated