| Patents for G05F 1 - Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems (37,749) |
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| 04/03/1979 | US4147910 Power adjustment with variable frequency and duty-cycle control for induction heating apparatus |
| 04/03/1979 | US4147608 Impressed current cathodic protection |
| 04/03/1979 | CA1051970A1 Motor control circuit including motor current limiting means |
| 03/20/1979 | US4145649 Amplitude insensitive voltage-to-current converter and method for conversion |
| 03/20/1979 | US4145592 Induction heating apparatus with means for detecting zero crossing point of high-frequency oscillation to determine triggering time |
| 03/13/1979 | US4144484 DC Voltage control device |
| 03/06/1979 | US4143314 Closed loop solar array-ion thruster system with power control circuitry |
| 03/06/1979 | CA1050170A1 Circuit arrangement for firing controlled, parallel-connected electric valves |
| 03/06/1979 | CA1050108A1 Photoresponsive current limiting switching circuit |
| 02/27/1979 | US4142231 High current low voltage liquid cooled switching regulator DC power supply |
| 02/27/1979 | US4142141 Ferroresonant voltage regulating circuit |
| 02/21/1979 | EP0000844A1 Semiconductor circuit arrangement for controlling a controlled device. |
| 02/20/1979 | US4140962 High voltage regulator using light dependent resistor |
| 02/13/1979 | US4139723 Power control unit for a single phase load with slightly changing impedances |
| 02/13/1979 | CA1048640A1 Power supply circuit |
| 02/06/1979 | CA1048107A1 Method and apparatus for the static compensation of reactive power |
| 01/23/1979 | US4136305 Power converter control apparatus |
| 01/16/1979 | US4135126 Device for noncontact switching of loaded transformer tappings |
| 01/16/1979 | US4135123 Transformer control device |
| 01/16/1979 | US4134685 Flameless atomization |
| 01/16/1979 | CA1046580A1 Condition responsive modulated current regulator |
| 01/16/1979 | CA1046579A1 Controlled reactance regulator circuit |
| 01/02/1979 | US4133018 Thyristor fault-detecting apparatus |
| 01/02/1979 | CA1045682A1 Power regulator responsive to duty cycle |
| 12/26/1978 | US4131938 Digital chopper regulator |
| 12/26/1978 | US4131927 A.C. power supply circuit with surge current suppression |
| 12/26/1978 | US4131827 Power transfer apparatus |
| 12/26/1978 | US4131754 Automatic melt rate control system for consumable electrode remelting |
| 12/26/1978 | CA1045202A1 Phase shifter |
| 12/26/1978 | CA1045201A1 Mis transistor voltage regulator |
| 12/19/1978 | US4130790 Ferroresonant transformer power supply |
| 12/19/1978 | US4130767 Semiconductor switch |
| 12/19/1978 | CA1044782A1 Apparatus for electrolytically processing aluminium material |
| 12/19/1978 | CA1044758A1 Three phase load controlling system |
| 12/19/1978 | CA1044756A1 Frequency reduction and power control circuit for thyristor line controllers |
| 12/12/1978 | US4129809 Power factor corrected dual converter motor drive |
| 12/05/1978 | US4128771 Digitally controlled power system |
| 12/05/1978 | CA1043907A1 Current pulse generator for rotating field magnetic bubble propogation |
| 12/05/1978 | CA1043906A1 Rotary magnetic field current pulse generating circuit for magnetic bubble propagation |
| 12/05/1978 | CA1043872A1 Variable flux-reset ferroresonant voltage regulator |
| 11/28/1978 | US4127783 Regulated constant current circuit |
| 11/21/1978 | US4126891 Switching regulator with feedback system for regulating output current |
| 11/21/1978 | CA1042986A1 Modulated energy conservative current supply |
| 11/21/1978 | CA1042985A1 Low cost voltage regulating relay |
| 11/21/1978 | CA1042977A1 Voltage monitoring controlling and protecting apparatus employing programmable unijunction transistor |
| 11/14/1978 | US4125814 High-power switching amplifier |
| 11/14/1978 | CA1042531A1 Temperature sensitive control circuit |
| 11/14/1978 | CA1042508A1 Static control for step voltage regulator |
| 11/14/1978 | CA1042507A1 Pulse control system power circuit |
| 11/14/1978 | CA1042500A1 Solid state chopper ballast for gaseous discharge lamps |
| 11/07/1978 | CA1042072A1 Linear energy conservative current source |
| 10/31/1978 | CA1041604A1 Electronic control for star-connected loads |
| 10/24/1978 | US4122515 High harmonic current reducing apparatus in power converter |
| 10/24/1978 | US4122514 Direct current power supply |
| 10/24/1978 | US4122513 Power control device |
| 10/24/1978 | US4122382 Load-responsive treater controller |
| 10/24/1978 | CA1041171A1 Energy transfer circuit |
| 10/24/1978 | CA1041168A1 Control unit for a converter |
| 10/17/1978 | US4121092 Electric power apparatus |
| 10/17/1978 | CA1040706A1 Momentary power supply shutdown system |
| 10/17/1978 | CA1040701A1 Solid-state hid lamp dimmer |
| 10/10/1978 | US4119907 Power factor corrector for a resistive load |
| 10/10/1978 | US4119906 Constant high voltage generating circuit |
| 10/10/1978 | US4119905 Programmable alternating current switch |
| 10/10/1978 | US4119864 Touch switch circuits |
| 10/10/1978 | US4119835 Electronic thermostat |
| 10/03/1978 | US4118769 Full wave demand controlled preregulating supply |
| 10/03/1978 | US4118768 Demand controlled preregulating rectifier circuit for power supplies |
| 09/26/1978 | US4117391 Current stabilizing circuit |
| 09/26/1978 | US4116238 High voltage constant current source for iontophoresis |
| 09/26/1978 | CA1039352A1 Method and apparatus for compensating reactive power |
| 09/19/1978 | CA1038929A1 Gate pulse power supply for static alternating current switch |
| 09/12/1978 | US4114085 Method of improving the temperature stability of a voltage source, and a stabilized voltage source for carrying out the method |
| 09/12/1978 | US4114053 Zero temperature coefficient reference circuit |
| 09/12/1978 | US4114048 Load balancing system for ups rectifiers |
| 09/05/1978 | US4112348 Contactless switch for regulating taps of induction electric machines |
| 09/05/1978 | US4112347 Conversion and control of electrical energy by electromagnetic induction |
| 09/05/1978 | US4112346 Constant current circuit |
| 08/29/1978 | US4110678 Electronic monitoring system |
| 08/29/1978 | US4110677 Operational amplifier with positive and negative feedback paths for supplying constant current to a bandgap voltage reference circuit |
| 08/22/1978 | US4109161 Memory circuit with protection circuit |
| 08/22/1978 | US4109134 Power control circuit and electro(photo)graphic apparatus employing same |
| 08/22/1978 | CA1037117A1 Bandwidth limit circuit for step voltage regulator |
| 08/22/1978 | CA1037115A1 Apparatus for stabilization of electrical power supply mains |
| 08/15/1978 | US4107620 Regulated power supply with auto-transformer output and direct current feedback |
| 08/15/1978 | US4107584 Current limiting device for an a.c. motor |
| 08/15/1978 | US4107552 Semiconductor switch |
| 08/08/1978 | US4106084 Means for controlling the electric current density of a high tension direct current source |
| 08/08/1978 | US4105964 Voltage regulation and stabilization device |
| 08/01/1978 | CA1035837A1 Direct current regulating device |
| 07/25/1978 | US4103324 Saturable reactor-type power supply |
| 07/25/1978 | US4103219 Shunt voltage regulator |
| 07/25/1978 | US4102771 Measuring device and process for recording on electrodeposition parameters of throwing power |
| 07/25/1978 | US4102298 Device for deposition of semi-conductor material |
| 07/18/1978 | US4101821 Variable phase shifting apparatus |
| 07/18/1978 | US4101819 Three phase controlling system |
| 07/11/1978 | USRE29700 Voltage-current converter |
| 07/11/1978 | US4100595 Circuit for the production of an output voltage depending on an input direct voltage and a given desired voltage |
| 07/11/1978 | US4100479 Electronic monitoring system with Zener diode to control capacitor charging current |
| 07/11/1978 | US4100435 Phase control apparatus |