| Patents for H01H 33 - High-tension or heavy-current switches with arc-extinguishing or arc-preventing means (18,584) |
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| 11/21/1978 | US4126808 High voltage two stage triggered vacuum gap |
| 11/21/1978 | CA1042963A1 Circuit breaker comprising high current bushing with forced cooling arrangement |
| 11/14/1978 | CA1042493A1 High voltage gas blast circuit interrupter |
| 11/07/1978 | US4124790 Protective switch device and operating mechanism therefor |
| 11/07/1978 | CA1042045A1 High amperage switching apparatus with bi-metallic arcing contacts |
| 11/07/1978 | CA1042041A1 Two-pressure gas circuit breaker with low pressure gas heating |
| 11/07/1978 | CA1042040A2 Puffer interrupter with down stream initiated arc |
| 10/31/1978 | US4123637 High voltage air disconnect switch incorporating a puffer-type load break switch |
| 10/31/1978 | US4123636 Double-flow puffer-type single-pressure compressed-gas circuit-interrupter |
| 10/31/1978 | US4123618 Vapor-cooled terminal-bushings for oil-type circuit-interrupters |
| 10/31/1978 | CA1041649A1 Automatic transfer switch |
| 10/31/1978 | CA1041603A1 High voltage current-limiting interrupter |
| 10/17/1978 | US4121268 Electrolytic cell vacuum switching system |
| 10/17/1978 | US4121075 Double-break puffer-type compressed-gas circuit-breaker |
| 10/17/1978 | US4121069 Snap-action electric switch with fulcrum means for limited contact sliding and positive-off torque |
| 10/17/1978 | CA1040689A1 Motion-multiplying linkage-mechanism for sealed-casing structures |
| 10/10/1978 | US4119358 Electrical connector switching module |
| 10/10/1978 | CA1040241A1 Electrical loadbreak arc quenching and containing assembly |
| 10/10/1978 | CA1040240A1 Electric circuit breaker comprising parallel-connected vacuum interrupters |
| 10/03/1978 | US4118755 Self-cooled metal-clad switchgear |
| 10/03/1978 | US4118613 Hydraulically-actuated operating system for an electric circuit breaker |
| 10/03/1978 | US4117678 Self-contained hydraulic switch operator |
| 10/03/1978 | CA1039781A1 Multi-chamber arc quenching device with nozzle-chaped contacts |
| 10/03/1978 | CA1039779A1 Shorting element for closing a super conducting current path |
| 09/26/1978 | US4117289 Single tank multibreaker circuit interrupter |
| 09/26/1978 | US4117288 Vacuum type circuit interrupter with a contact having integral axial magnetic field means |
| 09/19/1978 | US4115672 Vacuum switch and electro-magnetic coil assembly therefor |
| 09/12/1978 | US4114004 Gas-blast electric cut-out device |
| 09/12/1978 | US4114003 Quick-acting movable operating-column tripping device |
| 09/12/1978 | US4113339 Load break bushing |
| 09/12/1978 | CA1038430A1 Quick-acting movable operating-column tripping device |
| 09/12/1978 | CA1038428A1 Puffer interrupter with down stream initiated arc |
| 09/12/1978 | CA1038206A1 Powdered metallurgical process for forming vacuum interrupter contacts |
| 09/05/1978 | US4112276 Compressed-gas circuit-interrupter having a sleeve-valve for temporarily blocking the orifice throat |
| 08/29/1978 | US4110806 Circuit interrupting apparatus for use in direct current circuits |
| 08/29/1978 | US4110580 Gas-type circuit-interrupters having admixtures of helium with small concentrations of sulfur-hexafluoride (SF6) gas |
| 08/29/1978 | US4110579 Improved energy-storage operating mechanisms for circuit-interrupting structures utilizing serially-related disconnecting switch structures therewith |
| 08/29/1978 | US4110578 Circuit breaker |
| 08/29/1978 | US4109894 Pilot valve device for regulating the flow of a fluid |
| 08/22/1978 | US4109124 Circuit-breakers for high voltages |
| 08/22/1978 | US4109123 Vacuum switch |
| 08/22/1978 | US4109122 Vacuum switch with intermittently energized electromagnetic coil |
| 08/15/1978 | US4107498 Disconnect switch and drive mechanism therefor |
| 08/15/1978 | US4107496 Vacuum switching apparatus with double interruption and including an interposed barrier |
| 08/15/1978 | CA1036648A1 Movable-contact-stem operator for a vacuum-type circuit-interrupter |
| 08/15/1978 | CA1036644A1 Circuit-interrupter |
| 08/08/1978 | US4105881 Circuit breaker apparatus with static pressure lock |
| 08/08/1978 | US4105880 Arc blow-out switch |
| 08/08/1978 | US4105879 Magnetic puffer type gas circuit breaker |
| 08/08/1978 | US4105878 Vacuum interrupter and disconnect combination |
| 08/01/1978 | US4104689 Vacuum contactor protector |
| 08/01/1978 | US4104506 Process for soldering to laminations of an arcing contact for a high current switch |
| 08/01/1978 | US4104497 Disconnect contact assembly for metal-clad switchgear and the like |
| 08/01/1978 | US4104496 Vacuum interrupter device |
| 08/01/1978 | US4104238 Silica-alumina trihydrate filled epoxy castings resistant to arced SF6 |
| 07/25/1978 | US4103291 Leak sensor and indicating system for vacuum circuit interrupters |
| 07/25/1978 | US4103131 Puffer interrupter with main and auxiliary pistons and common cylinder |
| 07/25/1978 | US4103130 Resistor applications for high-power circuit breakers |
| 07/25/1978 | US4103129 High voltage circuit interrupter switch arrangement |
| 07/25/1978 | US4103128 Tank-type compressed-gas circuit-breaker having capacitance-supporting means |
| 07/25/1978 | US4102851 Alumina-thickened cycloaliphatic epoxy materials for use in atmospheres of arced sulfur hexafluoride and articles thereof |
| 07/18/1978 | US4101748 Modular puffer-type circuit-interrupter unit adaptable for different voltage and current ratings |
| 07/18/1978 | US4101746 Apparatus for controlling the drive for hydraulically actuated high-voltage power circuit breakers |
| 07/04/1978 | US4099155 Gas actuated high voltage bushing |
| 07/04/1978 | US4099039 Means for effectively controlling the forces imposed on the movable contact of a vacuum-type circuit interrupter |
| 06/27/1978 | US4097701 Coaxial polarity reversing switch with rotary actuation |
| 06/20/1978 | US4096367 Gas insulated circuit breaker incorporating complete modular interrupter structure and operating mechanism |
| 06/20/1978 | US4096366 Means for detecting a loss of vacuum in vacuum-type circuit interrupters used in polyphase a.c. vacuum circuit breaker |
| 06/13/1978 | US4095200 Contactor having reduced contact bounce and shorter arc time |
| 06/13/1978 | US4095069 Stainless-steel interrupter-head construction for circuit-interrupters continuously carrying high-value-amperage currents |
| 06/13/1978 | US4095068 Stationary-contact-and voltage-shield assembly for a gas-puffer-type circuit-interrupter |
| 06/06/1978 | US4093837 Oil circuit-breaker pump-assembly with improved shunting contact structure |
| 05/23/1978 | US4091310 Method and apparatus for on-switching in a crossed-field switch device against high voltage |
| 05/23/1978 | US4091251 Vacuum switch |
| 05/23/1978 | US4091248 Vacuum-type circuit breaker |
| 05/16/1978 | US4090052 Tank-type oil circuit-interrupter with jet forces counterbalancing the magnetic forces |
| 05/16/1978 | US4090051 Energy-storage operating mechanisms for circuit-interrupting structures alone and also for circuit-interrupting structures utilizing serially-related disconnecting-switch structures therewith |
| 05/09/1978 | US4088860 Vacuum interrupter for high voltage application |
| 05/09/1978 | US4088859 Normal open low voltage vacuum shorting switch |
| 05/02/1978 | US4087664 Hybrid power circuit breaker |
| 04/25/1978 | US4086645 Repulsion coil actuator for high speed high power circuits |
| 04/25/1978 | US4086461 High-voltage circuit-interrupters |
| 04/25/1978 | US4086459 Rod array vacuum switch for high voltage operation |
| 04/04/1978 | US4082932 High-voltage electric equipment cell |
| 04/04/1978 | US4082931 Melamine-formaldehyde resin, ceramic coating |
| 04/04/1978 | US4081900 Method of forming covers for electrical equipment |
| 03/28/1978 | US4081640 Compact vacuum switch for high voltage circuit interruption |
| 03/21/1978 | US4080521 Quenching contact arrangement for a compressed-gas circuit breaker |
| 03/14/1978 | US4079219 SF 6 Puffer for arc spinner |
| 03/14/1978 | US4079218 Puffer interrupter with piston bypass channel |
| 03/14/1978 | US4079217 Vacuum interrupter with bellows dampener |
| 03/14/1978 | US4079216 Closing-resistor support for EHV power circuit-breakers |
| 03/07/1978 | US4077114 Vacuum power interrupter |
| 02/28/1978 | US4076368 Terminal fastener and instrument tap |
| 02/21/1978 | US4075673 Operating system for generator circuit-breakers |
| 02/21/1978 | US4075448 Cell bypass switches for electrochemical cell systems |
| 02/21/1978 | US4075447 Double-puffer-type compressed-gas circuit-interrupter constructions |
| 02/07/1978 | US4072838 Electrical power switch with pressurized gas blasting device for lengthening the switching arc |
| 02/07/1978 | US4072837 High continuous current vacuum-type circuit interrupter |
| 02/07/1978 | US4072836 Electrical switch with means for switching an auxiliary resistance into the circuit controlled thereby |