| 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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| 07/11/1978 | US4100427 Device for converting solar energy |
| 07/04/1978 | US4099115 Constant-voltage regulated power supply |
| 07/04/1978 | US4099099 Method of and switching device for reducing feedback from a consumer periodically connected to an A.C. line |
| 06/27/1978 | US4097723 Thermal systems incorporating apparatus and methods for simulating time related temperatures |
| 06/27/1978 | US4097355 Water sterilization apparatus |
| 06/13/1978 | US4095165 Switching regulator control utilizing digital comparison techniques to pulse width modulate conduction through a switching device |
| 06/13/1978 | US4095164 Voltage supply regulated in proportion to sum of positive- and negative-temperature-coefficient offset voltages |
| 06/06/1978 | US4093909 Method and apparatus for operating a semiconductor integrated circuit at minimum power requirements |
| 06/06/1978 | US4093908 Phase-controlled voltage regulator |
| 06/06/1978 | US4093907 Reference source for producing a current which is independent of temperature |
| 05/23/1978 | US4091434 Surge current protection circuit |
| 05/23/1978 | US4091432 Constant current-source with high voltage protection, compliance circuit |
| 05/23/1978 | US4091321 Low voltage reference |
| 05/16/1978 | US4090225 Fail-safe circuit for tap-changing transformer regulating system |
| 05/16/1978 | US4090123 Regulated power supply crow-bar protection |
| 05/16/1978 | US4090111 Malfunction detecting apparatus for use in a CRT deflection circuit |
| 05/16/1978 | US4090106 Field emision electron gun with controlled power supply |
| 05/09/1978 | US4088941 Voltage reference circuits |
| 05/02/1978 | US4087850 Power supply circuit |
| 04/25/1978 | US4086570 Controlled DC current supply device with open circuit detecting means |
| 04/25/1978 | US4086526 Method of and a power switching device for regulating the electrical power delivered to a consumer in an A.C. network |
| 04/11/1978 | US4084232 Power confidence system |
| 04/11/1978 | US4084223 Control unit |
| 03/28/1978 | US4080940 Engine control |
| 03/21/1978 | US4080272 Cathodic protection method and apparatus |
| 03/14/1978 | US4079445 Device for voltage regulation of a solar generator |
| 03/14/1978 | US4079270 Gate control apparatus |
| 03/14/1978 | US4078983 Digital control of electrolytic current |
| 03/14/1978 | US4078393 Control system for controlling the operation of a three-phase load |
| 03/07/1978 | US4078200 Current limiting circuit arrangements |
| 02/21/1978 | US4075677 Electrostatic coating system |
| 02/21/1978 | US4075548 Stabilized voltage source having a series regulator on the alternating-voltage side |
| 02/21/1978 | US4075546 Regulated power supply with combined series and shunt regulating transistors |
| 02/14/1978 | US4074182 Power supply system with parallel regulators and keep-alive circuitry |
| 02/07/1978 | US4072889 Electronically stabilized feeder device for the supply of DC current |
| 01/31/1978 | US4071812 AC Inverter with constant power output |
| 01/10/1978 | US4068159 Fast current measurement apparatus for static VAR generator compensator control circuit and method for using same |
| 01/10/1978 | US4068157 Regulated multiple transformer system |
| 01/10/1978 | US4067276 Control device for a sewing machine |
| 01/03/1978 | USRE29510 High efficiency switching drive for a resonate power transformer |
| 12/27/1977 | US4065805 Circuit arrangement in an electrical device operated with direct-current, especially in a timing relay |
| 12/27/1977 | US4065709 Digital apparatus for setting the voltage across a capacitor |
| 12/20/1977 | US4064448 Band gap voltage regulator circuit including a merged reference voltage source and error amplifier |
| 12/20/1977 | US4064419 Synchronous motor KVAR regulation system |
| 12/13/1977 | US4063148 First house protector for voltage regulators and the like |
| 12/13/1977 | US4063147 Stabilized power supply circuit |
| 12/13/1977 | US4063145 Circuit arrangement for firing controlled, parallel-connected electric valves |
| 12/06/1977 | US4061960 Apparatus for providing regulated direct current to magnetizing coils for non-destructive magnetic testing |
| 12/06/1977 | US4061958 Constant power rating power supply |
| 11/22/1977 | US4059793 Semiconductor circuits for generating reference potentials with predictable temperature coefficients |
| 11/08/1977 | US4057842 Current regulation system for three-phase load |
| 11/08/1977 | US4057789 Reference voltage source for memory cells |
| 11/01/1977 | US4056732 Voltage regulation in an electronic engine control system having digital effector actuators |
| 10/25/1977 | US4055791 Self commutated SCR power supply |
| 10/18/1977 | US4054831 Power supply turn-on and turn-off transient elimination circuits |
| 10/18/1977 | US4054830 Regulated power supply |
| 10/18/1977 | US4054829 Electrical isolators |
| 10/18/1977 | US4054802 Power control circuit |
| 10/18/1977 | US4054486 Nuclear reactor fail-safe unit having the function of control relay and current regulation |
| 10/04/1977 | US4052744 Temperature monitoring of semiconductors |
| 10/04/1977 | US4052660 Dc series voltage regulator with gating means for output to remain off until regulation level is reached |
| 09/27/1977 | US4051543 Over voltage protector using current monitoring |
| 09/27/1977 | US4051428 Current control circuit with current proportional circuit |
| 09/20/1977 | US4050008 Control unit for an a-c control element with full-wave control |
| 09/20/1977 | US4049899 Apparatus for uniformly heating molten glass |
| 09/13/1977 | US4048523 Electronic filter with active elements |
| 09/06/1977 | US4047097 Apparatus and method for transient free energization and deenergization of static VAR generators |
| 08/30/1977 | US4045722 Power converter system |
| 08/16/1977 | US4042830 Solid state programmable dynamic load simulator |
| 08/16/1977 | US4041894 Electronic arrangement for generating two alternating voltages whose phases are shiftable |
| 08/09/1977 | US4041368 Three-phase, quasi-square wave VSCF induction generator system |
| 08/09/1977 | US4041357 High voltage protection circuit |
| 08/02/1977 | US4040081 Alternating current control circuits |
| 08/02/1977 | US4039850 Voltage converter |
| 07/26/1977 | US4038594 Distortionless sine wave amplification |
| 07/26/1977 | US4038592 Voltage and frequency control circuit |
| 07/19/1977 | US4037148 Ballast control device |
| 07/19/1977 | US4037044 Power control system for single phase induction melting or heating furnace |
| 07/12/1977 | US4035715 Current monitoring of a modular power controller |
| 07/12/1977 | US4035710 Pulse width modulated voltage regulator-converter/power converter having means for improving the static stability characteristics thereof |
| 07/12/1977 | US4035700 Electronic control apparatus |
| 06/28/1977 | US4032840 Adjustable transformer |
| 06/28/1977 | US4032833 Chopper control device |
| 06/28/1977 | US4032800 Logic level conversion system |
| 06/14/1977 | US4030025 Ferroresonant regulator with supplementary regulation through waveform control |
| 06/14/1977 | US4030017 Controlled reactance regulator circuit |
| 06/14/1977 | US4030016 Precision active rectifier circuit |
| 06/07/1977 | US4028613 Arrangement for supplying a load with controlled current from an alternating current source |
| 06/07/1977 | US4028609 Digital firing pulse generator with pulse suppression |
| 05/31/1977 | US4027227 Combination voltage regulating system |
| 05/24/1977 | US4025841 Current limiting circuit for voltage regulated power supply |
| 05/17/1977 | US4024474 Circuit arrangement for wireless transmission of a control signal to the control path or a controllable semiconductor valve, in particular a thyristor |
| 05/17/1977 | US4024451 Stabilized DC power supply device |
| 05/17/1977 | US4024429 Operating voltage supply system for gas discharge display panel |
| 05/10/1977 | US4023086 Control system for rectifier equipment |
| 05/03/1977 | US4021701 Transistor protection circuit |
| 05/03/1977 | US4021636 Beam current control device for a technical corpuscular beam apparatus |
| 04/26/1977 | US4020440 Conversion and control of electrical energy by electromagnetic induction |
| 04/19/1977 | USRE29191 Base reach-through active series voltage regulator |
| 04/19/1977 | US4019124 Apparatus for compensating reactive power in a three-phase network |