Power Supplies, Power Electronics patents, 1920-1975

Power Supplies Patents 1920-1975 Brought to you by SMPS Power Supplies

1975 - USA
Number	Title	Inventor	Assignee	Comments
3,859,590	Waveform averaging rc circuit	Cielo et al.
3,863,134	Electric control cicuit for electronic power converters	Pollard
3,870,392	Grounding mounting means	Bond
3,875,494	Static power conversion arrangement for converting direct current power to …	Gyugyl
3,877,004	Alarm apparatus	Okada et al.
3,882,370	Control of power converters having a parallel resonant commutatin circuit	McMurray
3,883,786	Pulse width modulated servo system	McNaughton et al.
3,886,485	Linear voltage controlled oscillator including a timing capacitor charged and …	Takahashi
3,889,169	Position and velocity servo control for motor controlled article carrier and handler	Hirschman
3,892,977	Switchable high voltage power supply	Bierly
3,902,107	Circuit for protecting series-connected switches	Brown
3,904,928	Flyback transformer	Sawada
3,904,950	Rectifier circuit	Judd et al.
3,909,698	Regulated AC to DC converter having a controllable rectifier assembly	Nill
3,909,700	Monolithic semiconductor rectifier circuit structure	Ferro
3,916,281	Voltage regulator control circuit	Owen
3,917,990	Battery charging control using temperature differential circuit	Sherman, Jr.
3,928,793	Power supply circuit with electro-magnetic feedback	Waltz

1974 - USA
Number	Title	Inventor	Assignee	Comments
3,790,878	Switching regulator having improved control circuiting	Brokaw
3,793,511	Digital motor control circuit	Bala et al.
3,816,809	Power supply having improved over-voltage protection	Kuster
3,818,297	Motor control apparatus	Ha
3,818,484	Power electronic circuit for elecrtronic digital system	Nakamura et al.
3,820,893	Synchronizing apparatus	Donohue
3,824,447	Booster circuit	Kuwabara
3,828,239	High dc voltage generating circuit	Nagai et al.

1973 - USA
Number	Title	Inventor	Assignee	Comments
3,735,225	Control device for switching rectifier systems	Raatz
3,735,235	Dc to Dc converter with voltage regulation feedback loop achieving isolation …	Hamilton et al.
3,735,241	Poly-phase digital controller	O'Sullivan
3,760,258	Static converter	Percorini
3,761,790	Current stabilizing circuit with minimal leakage	Shuey
3,772,588	Dual Control Loop Switching Regulator	Kelly et al.	Cogar Corp.

1972 - USA
Number	Title	Inventor	Assignee	Comments
3,636,481	Modular elements for electrical filters	Boulin et al.
3,659,185	Volt-Second Unbalanced Compensated Two Core Power Transformer	Gregorich	Collins Radio
3,660,751	Dc-dc regulated inverter employing pulse-width modulation with a volt second …	Bullinga
3,667,028	Rectifier circuit including transistors	Leufgen
3,694,726	Combined inductor and transformer device	Cielo et al.
3,697,855	Hysteresis-loop control for a power transformer	Kernick

1971 - USA
Number	Title	Inventor	Assignee	Comments
3,562,623	Circuit for reducing stray capcitance effects in transformer windings	Farnsworth
3,571,614	Transistor switch with minimized trasition power absorption	Rolstead
3,579,156	Shielded filter	Parfitt
3,582,754	Direct-current converter with overload protection	Hoffmann
3,582,758	Rectifier using low saturation voltage transistors	Gunn
3,611,097	Digital control system for ac to dc power conversion	Joslyn
3,611,330	Method of detecting impeding saturation of magnetic cores	Cacossa
3,621,363	An arrangement for premagnetizing a static dc converter	Ginman et al.
3,624,405	Balanced current regulator with current-balance-responsive feedback circuit	Bishop et al.
3,624,475	Duty cycle control apparatus	Smith
3,631,259	Apparatus for boosting a direct current voltage	Kiyota