Voltage supply system

Claim 2

In a television receiver operable alternatively from a first source of alternating current line derived voltage or from a second substantially lower voltage direct current voltage source, a direct current voltage supply system comprising: a deflection generator; a first winding coupled to said deflection generator for having voltage variations induced thereacross in response to current flow in said deflection generator; rectifying means coupled to said winding for rectifying said voltage variations; filtering and storage means for filtering and storing said rectified voltage variations; and switching means for coupling said winding and rectifying means to said filtering and storage means when said receiver is operable from said first voltage source for providing at a terminal of said filtering and storage means a direct current voltage substantially equal to said second voltage for supplying said direct current voltage, said switching means switchable for coupling said second voltage source to said winding and rectifying means when said receiver is operable from said second voltage source for biasing said rectifying means for preventing the rectification of said voltage variations induced in said winding for inhibiting current flow in said winding for preventing power losses in said winding due to current flow therein.

Claim 3

An operating voltage supply system according to claim 1 wherein: said deflection system is a horizontal deflection system and said transformer is a horizontal output transformer; said winding is a secondary winding of said horizontal output transformer; SAID rectifying means is a diode serially coupled to said secondary winding; and said filtering and storage means is a capacitor.

Claim 4

An operating voltage supply system according to claim 1 wherein: said switching means is switchable for coupling said second voltage source across the serial combination of said rectifying means and said winding and said voltage variations induced across said winding do not exceed the sum of the voltage supplied by said second voltage source and the forward bias voltage necessary to render said rectifying means conductive thereby inhibiting current flow in said winding when said receiver is operable from said second voltage source.

Claim 5

In a television receiver operable alternatively from a first source of alternating current line derived voltage or from a second substantially lowr voltage direct current voltage source, a direct current voltage supply system for supplying operating voltage for said receiver comprising: a deflection system including an output transformer, a winding thereof having voltage variations induced thereacross in response to current flow in said deflection system; rectifying means coupled to said winding for rectifying said voltage variations; capacitance means for filtering and storing said rectified voltage variations; and switching means for coupling said rectifying means and said winding serially across said capacitance means when said receiver is operable from said first voltage source for providing at a terminal of said capacitance means a direct current voltage supply for providing operating voltage for said receiver, said switching means switchable for coupling said second voltage source to said serially coupled rectifying means and winding when said receiver is operable from said second voltage source for biasing said rectifying means for preventing the rectification of said voltage variations induced in said winding for inhibiting current flow in said winding for preventing losses in said winding due to current flow therethrough.

Claim 6

In a television receiver operable alternatively from a first source of alternating current line derived voltage or from a second substantially lowr voltage direct current voltage source, a direct current voltage supply system for supplying operating voltage for said receiver comprising: a deflection system including an output transformer, a winding thereof having voltage variations induced thereacross in response to current flow in said deflection system; rectifying means coupled to said winding for rectifying said voltage variations; capacitance means for filtering and storing said rectified voltage variations; and switching means for coupling said rectifying means and said winding serially across said capacitance means when said receiver is operable from said first voltage source for providing at a terminal of said capacitance means a direct current voltage supply for providing operating voltage for said receiver, said switching means switchable for coupling said second voltage source to said serially coupled rectifying means and winding when said receiver is operable from said second voltage source for biasing said rectifying means for preventing the rectification of said voltage variations induced in said winding for inhibiting current flow in said winding for preventing losses in said winding due to current flow therethrough.

Claim 7

A dual mode voltage supply system, comprising: a deflection current generator; first and second terminals adapted to be coupled to first and second sources of direct current voltage, respectively; a transformer including first, second and third windings, said first winding having one end thereof coupled to said deflection current generator; switching means selectively operable in a first position for coupling said first terminal through a first path through said first winding to said generator, or in a second position for coupling said second terminal through a second path through said first winding to said generator; means for coupling said second and third windings in series and for adding the voltages derived therefrom during operation of said generator when said switching means is in said first position; and means for coupling said second terminal to the junction of said second and third windings and for disabling the voltage obtained from said second winding and substituting the voltage obtained from said second terminal therefor when said switching means is in said second position.

Claim 8

A dual mode voltage supply system, comprising: a deflection current generator; first and second terminals adapted to be coupled to first and second sources of direct current voltage, respectively; a transformer including first, second and third windings, said first winding having one end thereof coupled to said deflection current generator; switching means selectively operable in a first position for coupling said first terminal through a first path through said first winding to said generator, or in a second position for coupling said second terminal through a second path through said first winding to said generator; means for coupling said second and third windings in series and for adding the voltages derived therefrom during operation of said generator when said switching means is in said first position; and means for coupling said second terminal to the junction of said second and third windings and for disabling the voltage obtained from said second winding and substituting the voltage obtained from said second terminal therefor when said switching means is in said second position.

Claim 9

A dual mode voltage supply system according to claim 5 wherein said first and second sources of voltage are a source of rectified and filtered alternating current line derived voltage and a battery respectively.

Claim 10

A dual mode voltage supply system according to claim 5 wherein said second path includes a blocking diode the anode of which is coupled to said second terminal and the cathode of which is coupled to said first winding when said switching means is in said second position.

Claim 11

A dual mode voltage supply system according to claim 5 wherein said deflection current generator is a horizontal deflection generator and said transformer is a horizontal output transformer.