Abstract: A horizontal deflection circuit arrangement in which a saturable reactor operating as a variable impedance element is provided in the path of a horizontal deflection current flowing through a horizontal deflection coil for stabilizing the horizontal deflection current against fluctuations of the frequency of a horizontal drive signal for a horizontal output switching device, thereby to keep a suitable horizontal size of a raster made by the beam scan caused by the deflection current. The saturable reactor is supplied with a control signal varying in response to variations in the frequency of the horizontal drive signal to control the impedance thereof so as to compensate for the variations of the horizontal deflection current.

Abstract: In a cathode ray tube scanning system having a deflection yoke with horizontal and vertical deflection windings coupled to deflection current sources having horizontal and vertical scan rates, a top-bottom pin-cushion correction circuit includes a saturable reactor having a control winding coupled by a unidirectional conduction device to a flyback pulse signal source with a resonating capacitor coupling the unidirectional conduction device and control winding to a potential reference level and an output winding coupled to the current source at the vertical scan rate and shunted by a tuning means including a capacitor.

Abstract: Side, or left and right pin-cushion distortions in the raster of a cathode ray tube, for example, of a color television receiver having an in-line arrangement of its electron beams, are corrected by connecting the horizontal deflection winding of the cathode ray tube, the collector-emitter path of a transistor and the output winding of a saturable reactor, in series, to a power supply source, and by applying to the base or control electrode of the transistor and to the input winding of the saturable reactor a correction signal having a parabolic waveform of the vertical scanning rate or frequency so that correction of the side pin-cushion distortions is effected satisfactorily at all portions of the raster.

Abstract: A circuit arrangement in television display apparatus for correcting the horizontal linearity in which a network, for example, a resistor is arranged in series with the correction inductor. This makes it possible to correct the linearity throughout the trace time, which is necessary, for example, in the absence of a centring circuit.

Abstract: A pin cushion distortion correction circuit is disclosed in which a parallel circuit of a resistor and a diode is inserted into the base circuit of a driving transistor of a saturable reactor for the correction of left and right pin cushion distortions to increase a correction current corresponding to the central portion of a video screen.

Abstract: In a television receiver, a saturable transformer has three windings, one being in series with a horizontal deflection coil to introduce a parabolic reactance variation to correct for side pincushion distortion. An adjustable correction circuit includes a transistor integrator for producing in another winding of the saturable transformer a vertical parabolic current. The last winding of the saturable transformer is coupled through a pair of switching diodes to a pair of variable inductors. The diodes conduct alternately at the beginning and end of the vertical scanning period. The variable inductors may be mounted coaxially with a common movable core to allow inverse side correction, or may be mounted separately with separate movable cores to allow independent side correction.

Abstract: A saturable reactor for correction of pincushion distortion of a TV picture tube raster has, in one form, a magnetically saturable two window core. A single wire control coil is wound transversely around the central leg segment of the core and is connected with the vertical frequency sawtooth driver in a parabolic wave shaping network. A first load coil, wound transversely around one outer core leg, is connected in series circuit with the horizontal frequency sawtooth driver and the horizontal deflection coils. A second load coil is wound around the exterior of the core, in lengthwise embracing relation to its other outer leg, and is connected in series with the vertical deflection coils and also in a phase inverting resonant loop circuit.