| Patents for H02H 11 - Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result (2,416) |
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| 02/07/1984 | US4430610 In an electrical apparatus |
| 01/18/1984 | EP0098647A1 Mains-voltage discrimination device |
| 01/17/1984 | US4426658 IC With protection against reversed power supply |
| 01/03/1984 | US4424439 Protective method and circuit arrangement for appliance incorporating sheathed heating element |
| 12/28/1983 | EP0096915A1 Power supply system comprising an a.c. voltage supply source, a load and a connecting cable between the source and the load |
| 12/27/1983 | US4423456 Battery reversal protection |
| 12/13/1983 | US4420786 Polarity guard circuit |
| 11/15/1983 | US4415944 Electrical apparatus |
| 10/25/1983 | US4412266 AC Electrical device protective thermal relay |
| 10/11/1983 | US4409639 Solenoid driver circuit |
| 08/16/1983 | US4398534 Electrical surgical knife device |
| 08/16/1983 | CA1152157A1 Power line fault detector circuit |
| 06/22/1983 | EP0081864A1 Polarity guard circuit |
| 06/22/1983 | EP0081661A2 Earth fault protection device |
| 02/15/1983 | US4374306 Zero-loss automatic polarization protection device |
| 01/11/1983 | US4368498 Ground conductor monitoring system |
| 01/04/1983 | US4367506 Protective system for electric motors |
| 11/17/1982 | EP0064642A2 Electric safety device for the control of a printing machine |
| 06/30/1982 | EP0054940A1 Non-grounding checking system |
| 04/07/1982 | EP0048793A2 Post power failure starting suppressor in electrical appliances |
| 03/16/1982 | US4320447 Fail-safe amplifier power supply |
| 03/09/1982 | US4319297 Low winding resistance protective device |
| 02/02/1982 | US4314307 Electro-mechanical sensor power up circuit |
| 12/01/1981 | US4303958 Reverse battery protection |
| 11/03/1981 | US4298864 Power line fault detector circuit |
| 08/18/1981 | US4284939 Device for detecting opposite phase and open phase |
| 06/10/1981 | EP0030003A1 Electric surgical knife device |
| 05/12/1981 | CA1101060A1 Automatic switching circuit for series-parallel connection of several loads |
| 03/24/1981 | US4258368 Safety means for preventing the automatic restart of a motor |
| 01/20/1981 | CA1094150A1 Line protector for a communications circuit |
| 12/09/1980 | US4238722 Battery safety jumper cables |
| 11/12/1980 | EP0018867A2 Protected electric power supply comprising a thyristor |
| 11/11/1980 | CA1089529A1 Rotor overtemperature protection for electric motors |
| 10/28/1980 | CA1088652A1 Control apparatus |
| 10/14/1980 | US4228475 Ground monitoring system |
| 09/30/1980 | US4225899 Ground detecting device |
| 08/19/1980 | US4218625 Synchronizing check relay |
| 08/06/1980 | EP0013860A1 Device for section testing |
| 06/24/1980 | US4209816 Protective control for vehicle starter and electrical systems |
| 04/22/1980 | US4199798 Phase balance monitoring system incorporating voltage and phase sequence monitoring |
| 04/16/1980 | EP0009735A1 Apparatus for detecting opposite phase and open phase |
| 04/16/1980 | EP0009649A1 Circuit for controlling command conditions |
| 04/01/1980 | US4196378 Circuit for detecting a positive phase or an opposite phase in three phase alternating power source |
| 03/19/1980 | EP0008872A1 A circuit for indicating the reverse connection of connection leads with the terminals of an electromotive force source |
| 01/29/1980 | CA1070814A1 Phase sequence correcting system for three-phase ac power |
| 01/29/1980 | CA1070813A1 Over-voltage protection |
| 01/29/1980 | CA1070756A1 Phase monitoring arrangement for a three phase network supplying a d.c. motor through a controlled converter |
| 01/23/1980 | EP0007212A1 Protective control system for vehicle starter and electrical systems |
| 12/25/1979 | US4180380 Electrical controls for heating appliances |
| 12/25/1979 | CA1068781A Starting surge current protection circuit |
| 10/30/1979 | CA1065403A1 Power interruption safeguard apparatus |
| 10/23/1979 | CA1065042A1 Contactor device including arc suppression means |
| 10/16/1979 | US4171512 Circuit for preventing breakdown of a load resulting from wrong connection of a power source |
| 09/18/1979 | US4168515 Line protector for a communications circuit |
| 07/31/1979 | US4163270 Safety apparatus for use with a three-phase AC motor |
| 07/17/1979 | US4161661 System for automatically switching transformer coupled lines |
| 06/26/1979 | US4159503 Electric branch-line combiner with grounding |
| 06/12/1979 | CA1056489A1 Ground circuit monitor |
| 05/15/1979 | US4155001 Electrode-type vaporizer |
| 05/08/1979 | US4153923 Ground monitoring system and method |
| 05/08/1979 | CA1054225A1 Phase sequence detector for three-phase ac power system |
| 03/27/1979 | US4146847 Power limiting circuitry for use with power amplifier |
| 03/13/1979 | US4144483 Electrical polarity switch for battery |
| 02/27/1979 | CA1049610A1 Protection circuit for battery powered electronic devices |
| 02/21/1979 | EP0000846A1 Electrical protection device for checking the earth connection |
| 02/13/1979 | US4139880 CMOS polarity reversal circuit |
| 02/13/1979 | CA1048604A1 Ground fault circuit interrupter |
| 10/17/1978 | US4121140 Motor control circuit |
| 10/10/1978 | CA1040269A1 Ground integrity monitor for electrical apparatus |
| 09/12/1978 | US4114077 Rotor overtemperature protection for electric motors |
| 09/12/1978 | US4114047 Control apparatus |
| 09/12/1978 | CA1038449A1 Apparatus having a protective circuit |
| 08/29/1978 | US4110807 Continuity monitoring system |
| 05/23/1978 | US4091434 Surge current protection circuit |
| 05/09/1978 | US4088141 Fault circuit for stimulator |
| 05/02/1978 | US4087846 Protective circuit apparatus |
| 04/18/1978 | US4084406 Chiller controls |
| 04/11/1978 | US4084205 Phase monitoring arrangement for a three phase network supplying a d.c. motor through a controlled converter |
| 04/04/1978 | US4083041 Ground circuit monitor |
| 03/21/1978 | US4080642 Power system safety monitor |
| 02/21/1978 | US4075675 Ground conductor monitoring system and method |
| 01/10/1978 | US4068280 Automatic circuit restoration device for polyphase feed lines |
| 01/03/1978 | US4067054 Over-voltage protection |
| 09/13/1977 | US4048513 Rectifier controlled circuit |
| 09/06/1977 | US4047234 Low voltage protection circuit |
| 08/16/1977 | US4042965 Power interruption safeguard apparatus |
| 07/26/1977 | US4037963 Spark-discharge apparatus with ground detection safety circuit |
| 07/19/1977 | US4037265 Arc preventing power supply system |
| 07/05/1977 | US4034268 Speaker protection circuit |
| 06/21/1977 | US4031431 Ground fault circuit interrupter |
| 06/14/1977 | US4029996 Apparatus having a protective circuit |
| 06/07/1977 | US4028594 Safety circuit for electrical equipment |
| 06/07/1977 | US4028526 Electrically grounded vaporizer structure |
| 05/31/1977 | US4027223 Transceiver polarity protector |
| 05/24/1977 | US4025822 Two to three-wire converter circuit |
| 05/24/1977 | US4025820 Contactor device including arc supression means |
| 05/10/1977 | US4023073 Open circuit detector |
| 05/03/1977 | US4021704 Phase sequence correcting system for three-phase AC power |
| 03/08/1977 | US4011483 Ground wire monitoring system |
| 02/15/1977 | US4008417 Phase loss detector |