| Patents for H01H 33 - High-tension or heavy-current switches with arc-extinguishing or arc-preventing means (18,584) |
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| 01/04/1977 | US4001750 Corrosion resistant means in exhaust control device for circuit interrupting devices |
| 01/04/1977 | US4001643 Method and apparatus for a power circuit breaker controller |
| 01/04/1977 | US4000999 Centrifugally casting hollow glass body around vapor shield |
| 01/04/1977 | US4000930 Gastight liquid-type dynamic seal for control shafts of pressurized circuit interrupters |
| 12/28/1976 | US4000387 Puffer-type gas circuit-interrupter |
| 12/28/1976 | US3999464 Fluid actuator device for a high-voltage power circuit breaker |
| 12/14/1976 | US3997748 Vacuum interrupter with primary electrode surrounded by high dielectric strength shield |
| 12/14/1976 | US3997747 Circuit interrupter |
| 12/07/1976 | US3996439 Puffer-type gas-blast circuit breaker |
| 12/07/1976 | US3996438 Vacuum-type circuit interrupter with two sets of contacts electrically in parallel |
| 12/07/1976 | US3996437 Vacuum contactor for motor control and method of making |
| 11/30/1976 | US3995198 High voltage circuit breaker |
| 11/30/1976 | US3995130 Arc quenching chamber component structure for circuit breakers operating with pressurized gas |
| 11/09/1976 | US3991292 Dual compression puffer interrupter |
| 10/26/1976 | US3988554 Gas-blast switch |
| 10/19/1976 | US3987262 Puffer-type gas-blast circuit-interrupter having variable-area stationary composite piston structure |
| 10/19/1976 | US3987261 Axial blast puffer interrupter with multiple puffer chambers |
| 10/12/1976 | US3985988 Electric circuit breaker assembly |
| 10/12/1976 | US3985987 Means for recycling liquified insulating gas in a gas insulated circuit breaker |
| 10/12/1976 | US3985512 Telluride containing impregnated electric contact material |
| 10/05/1976 | US3984651 Electrical loadbreak arc quenching and containing assembly |
| 10/05/1976 | US3984648 Circuit breaker actuating device |
| 09/28/1976 | US3983353 Gas-filled high current bushing with forced cooling arrangement |
| 09/28/1976 | US3983346 Two-pressure gas circuit breaker with low pressure gas heating |
| 09/28/1976 | US3983345 Method of detecting a leak in any one of the vacuum interrupters of a high voltage circuit breaker |
| 09/28/1976 | US3982812 Power cable separable connector having gasket means for restricting the flow of arc-generated gases therefrom |
| 09/21/1976 | US3982088 High-voltage electric circuit breaker comprising series-connected vacuum interrupter and fluid blast interrupter |
| 09/14/1976 | US3980851 High amperage switching apparatus with bi-metallic arcing contacts |
| 09/14/1976 | US3980850 Vacuum interrupter with cup-shaped contact having an inner arc controlling electrode |
| 09/07/1976 | US3979704 Circuit breaker having members coated with phosphate-chromate protective layers |
| 08/17/1976 | US3975602 Arc quenching arrangement for a gas flow circuit breaker |
| 08/10/1976 | US3974349 Circuit breaker with automatically adjustable contact pressure |
| 08/03/1976 | US3973078 Seismic motion-damper for upstanding electrical equipment |
| 07/20/1976 | US3970811 Nozzle and contact arrangement for puffer type interrupter |
| 07/20/1976 | US3970810 Electric circuit breaker comprising parallel-connected vacuum interrupters |
| 07/20/1976 | US3970809 Electric circuit breaker comprising parallel-connected vacuum interrupters |
| 07/20/1976 | US3969985 Fluid actuating device for an electric circuit breaker |
| 07/13/1976 | US3969598 Vacuum-type circuit interrupter with a plurality of sets of contacts in parallel |
| 06/22/1976 | US3965318 Contact arrangement for an electric pressure gas power circuit breaker |
| 06/01/1976 | US3960554 Chromium copper |
| 05/25/1976 | US3958855 Electrical connector |
| 05/18/1976 | US3958156 Vacuum interrupter metal-clad switchgear vertically elevatable within compartment |
| 05/18/1976 | US3957453 Sintered metal powder electric contact material |
| 05/11/1976 | US3956721 Fault interrupter |
| 05/11/1976 | US3956605 Fluid blast circuit interrupter with a compact nozzle structure and versatile operating mechanism |
| 05/04/1976 | US3955057 Electric switch |
| 05/04/1976 | US3954249 Drain devices in hydraulic control circuits |
| 04/27/1976 | US3953698 Contact system for a vacuum switch |
| 04/27/1976 | US3953695 Heavy current switch |
| 04/27/1976 | US3953694 Magnetic-blast arc extinguishing device having permanent magnets |
| 04/27/1976 | US3953693 Vacuum switch with integrated capacitor shield |
| 04/13/1976 | US3950628 Bellows type shorting switch |
| 04/06/1976 | US3949343 Grounded surface distribution apparatus |
| 04/06/1976 | US3949182 Breaking chamber for self-blasting compressed gas electric circuit-breakers |
| 03/30/1976 | US3947650 Gas-insulated switch for an underground power distrubution system |
| 03/30/1976 | US3947649 Method and apparatus for arc quenching |
| 03/23/1976 | US3946184 Circuit breaker |
| 03/23/1976 | US3946183 Puffer piston gas blast circuit interrupter with insulating nozzle member |
| 03/23/1976 | US3946180 Downstream injection nozzle for puffer circuit interrupter |
| 03/23/1976 | US3946179 Vacuum interrupter |
| 03/16/1976 | US3944886 Protection apparatus for a capacitor connected in series with an electric power circuit |
| 03/16/1976 | US3944847 Electrical disconnect switch |
| 03/16/1976 | US3944772 Circuit breaker with low torque motor |
| 03/16/1976 | US3944771 Overcurrent protection device |
| 03/16/1976 | US3943777 Operating apparatus for circuit breaker |
| 03/09/1976 | US3943315 High-voltage gas-type circuit-interrupter having improved gas-partitioning and particle collecting means |
| 03/09/1976 | US3943314 Motion-multiplying linkage-mechanism for sealed-casing structures |
| 03/02/1976 | US3941963 Circuit breaker |
| 03/02/1976 | US3941962 Gas blast circuit breaker |
| 03/02/1976 | US3941961 Contact arrangement for a vacuum switch |
| 03/02/1976 | US3941960 Vacuum power circuit breaker |
| 03/02/1976 | US3941959 Vacuum switching apparatus with a drive unit at ground potential |
| 03/02/1976 | US3941957 High current high voltage switch structure with conductive piston |
| 02/24/1976 | US3940583 Arc quenching arrangement |
| 02/24/1976 | US3940582 Mechanically operated gas blast circuit interrupter having gastight enclosures |
| 02/17/1976 | US3939410 Arrangement for testing metal-clad, high-voltage installations |
| 02/17/1976 | US3939317 Electric compressed-gas circuit breaker |
| 02/03/1976 | US3936782 Automatic transfer switch |
| 01/27/1976 | US3935509 Synchronized switch with parallel contact |
| 01/27/1976 | US3935408 Heating means for high-voltage gas-type circuit interrupter |
| 01/27/1976 | US3935407 Multiphase vacuum switch assembly having cam operated spring charging drive mechanism with lost motion connection |
| 01/27/1976 | US3935406 Vacuum interrupter |
| 01/20/1976 | US3934174 Surge voltage protection for transfer switches for load-tap changers |
| 01/13/1976 | US3932719 Circuit breaker having a single pull-rod operating system with a selective trip-free control |