Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1978-06-12
1980-09-16
Miller, J. D.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
361159, 315408, H03K 483
Patent
active
042233674
ABSTRACT:
A circuit arrangement for driving saw-tooth current through a coil comprising a trace capacitor and a retrace capacitor, connected in a closed loop with said coil, a current recovery diode connected in parallel with the said retrace condenser, a first controllable switch, having a control electrode operative to receive periodic control signals to render the said first switch conductive during part of the trace interval, and an inductance connecting the said first switch to a power supply source in which energy is stored during the interval in which the said first switch is conductive and from which energy is supplied to the said first retrace capacitor by way of a second diode and a third capacitor when the said first switch is not conductive, the energy stored in the said third capacitor when the said first switch is not conductive, being restored to the supply source when the said first switch is conductive by way of a second controllable switch.
REFERENCES:
patent: 3043992 (1962-07-01), Schwartz
patent: 3825793 (1974-07-01), Dietz
patent: 3879636 (1975-04-01), Lamoureux
patent: 3950674 (1976-04-01), Joosten et al.
patent: 3999102 (1976-12-01), Gent et al.
patent: 4063134 (1977-12-01), Iida
patent: 4099101 (1978-07-01), Teuling
patent: 4122363 (1978-10-01), Zappala' et al.
patent: 4134047 (1979-01-01), Zappala'315408
Indesit Industria Elettrodomestici Italiana S.p.A.
Miller J. D.
Schroeder L. C.
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