Device for focussing and deflection of an electron beam in a cathode-ray apparatus

Claim 1

A device for focussing and deflecting an electron beam in a cathode-ray apparatus which comprises two windings disposed coaxially in operative relationship with the apparatus to provide focussing and scanning of the electron beam on the operating surface thereof, said device comprising: supply generator means for producing stabilized direct current for focussing said electron beam and alternating current for deflecting said electron beam, said supply generator means having an operatively interconnected shaping stage and output stage, the input to said output stage being coupled to the output of said shaping stage; and a power source for supplying power to the device which Includes a negative lead and a positive lead and is operatively coupled with said shaping and output stages; a pair of windings operatively coupled to said output stage, said pair comprising a first winding and a second winding each having a first lead and a second lead and being connected in series by means of said first leads, the two planes defined by the two sets of turns of the windings of said pair of windings being mutually non-parallel, said planes inclined at equal angles relative to the co-axis of said windings; a transistor of said output stage, said transistor having a collector, an emitter and a base; a first resistor of said output stage which has a first lead and a second lead and is connected to said emitter by means of the first lead thereof; a second resistor of said output stage said second resistor having a first lead and a second lead and connected to said collector by means of the first lead thereof; a first capacitor of said output stage, one lead of said capacitor being connected to said collector, the other lead, to a junction point defining the connection of the windings of said pair of windings, the second lead of said second resistor being connected to the second lead of said first winding; a third resistor of said output stage, a first lead of said third resistor being connected to the second lead of said second resistor, and a second lead of said third transistor, to the negative lead of said power source; a second capacitor connected in parallel with said third resistor; a fourth resistor of said output stage which has a first lead and a second lead and is connected to said base by means of the first lead thereof; a diode of said output stage, a first lead of said diode being connected to the second lead of said fourth resistor, the other lead of said diode being connected to the second lead of said second winding; a fifth resistor of said output stage, a first lead of said fifth resistor being connected to the second lead of said second winding, and a second lead thereof, to the positive lead of said power source; a third capacitor of said output stage connected in parallel with said fifth resistor the second lead of said first resistor being connected to the positive lead of said power source.

Claim 2

A device for focussing and deflecting an electron beam in a cathode-ray apparatus which comprises two windings disposed coaxially in operative relationship with the apparatus to provide focussing and scanning of the electron beam on the operating surface thereof, said device comprising: supply generator means for producing stabilized direct current for focussing said electron beam and alternating current for deflecting said electron beam, said supply generator means having an operatively interconnected shaping stage and output stage, the input to said output stage being coupled to the output of said shaping stage; and a power source for supplying power to the device which Includes a negative lead and a positive lead and is operatively coupled with said shaping and output stages; a pair of windings operatively coupled to said output stage, said pair comprising a first winding and a second winding each having a first lead and a second lead and being connected in series by means of said first leads, the two planes defined by the two sets of turns of the windings of said pair of windings being mutually non-parallel, said planes inclined at equal angles relative to the co-axis of said windings; a transistor of said output stage, said transistor having a collector, an emitter and a base; a first resistor of said output stage which has a first lead and a second lead and is connected to said emitter by means of the first lead thereof; a second resistor of said output stage said second resistor having a first lead and a second lead and connected to said collector by means of the first lead thereof; a first capacitor of said output stage, one lead of said capacitor being connected to said collector, the other lead, to a junction point defining the connection of the windings of said pair of windings, the second lead of said second resistor being connected to the second lead of said first winding; a third resistor of said output stage, a first lead of said third resistor being connected to the second lead of said second resistor, and a second lead of said third transistor, to the negative lead of said power source; a second capacitor connected in parallel with said third resistor; a fourth resistor of said output stage which has a first lead and a second lead and is connected to said base by means of the first lead thereof; a diode of said output stage, a first lead of said diode being connected to the second lead of said fourth resistor, the other lead of said diode being connected to the second lead of said second winding; a fifth resistor of said output stage, a first lead of said fifth resistor being connected to the second lead of said second winding, and a second lead thereof, to the positive lead of said power source; a third capacitor of said output stage connected in parallel with said fifth resistor the second lead of said first resistor being connected to the positive lead of said power source.