Programming system for a motor-driven television receiver tuning apparatus

Claim 2

In a motor driven television receiving tuning apparatus employing a voltage tunable tuner capable of processing signals associated wiht each of a plurality of signal channels in a band of frequencies, a system for providing selective bypassing of positions of a channel selector switch employed to provide for reception of selected ones of said plurality of signal channels, comprising: a plurality of potentiometers each having an adjustable contact providing a preset voltage; a channel selector switch including at least a plurality of stator contacts corresponding in number to said plurality of potentiometers, each connected to one of said adjustable contacts and rotor contacts connected to said voltage tunable tuner, said channel selector switch thereby providing for coupling of one of said preset voltages to said voltage tunable tuner at each of said plurality of stator contacts; a motor having a shaft coupled to said rotor contact of said channel selector switch; a motor control coupled to said motor for providing energization of said motor; and means coupled to said rotor contact of said channel selector switch for sensing a select range of voltage supplied from said plurality of potentiometers via said rotor and for providing a switching signal only when said select range is being sensed, said switching signal being coupled to said motor control to maintain energization of said motor.

Claim 3

The combination as in claim 1 wherein said means for sensing a selected range of voltage on said rotor and for providing a switching signal when said selected range is being sensed comprises: a switching means having an input terminal coupled to said rotor contact of said channel selector switch, an output terminal coupled to said motor control and a bias potential terminal; a source of bias potential coupled to said bias potential terminal of said switching means; said switching means providing said switching signal at said output terminal when a predetermined voltage difference exists between said preset voltage on said input terminal and said bias potential.

Claim 4

The combination as in claim 2 wherein said switching means comprises: a transistor having a base electrode coupled to said source of bias potential, an emitter electrode and a collector electrode coupled to said motor control; a unilateral conducting device; said unilateral conducting device coupled between said rotor contact of said channel selector switch and said emitter of said transistor; said unilateral conducting device being poled for efficient current flow between said base electrode of said transistor and said rotor contact of said channel selector switch.

Claim 5

The combination as in claim 2 wherein said switching means comprises: a first transistor having a base electrode, an emitter electrode coupled to a reference potential, and a collector electrode coupled to said motor control; a second transistor having a base electrode coupled to said source of bias potential, an emitter electRode and a collector electrode; said first transistor and said second transistor being of opposite conductivity types; a first resistor; a second resistor; said first resistor and said second resistor being coupled in a series combination and having a common terminal; said series combination being coupled between said collector of said second transistor and said reference potential; said base terminal of said first transistor being coupled to said common terminal; a unilateral conducting device; said unilateral conducting device coupled between said rotor contact of said channel selector switch and said emitter electrode of said second transistor; said unilateral conducting device being poled for efficient current flow between said base electrode of said second transistor and said rotor contact of said channel selector switch.

Claim 6

In a motor driven television receiving tuning apparatus employing a voltage tunable tuner capable of processing signals associated with each of a plurality of signal channels in a band of frequencies, a system for providing selective bypassing of positions of a channel selector switch employed to provide for reception of selected ones of said plurality of signal channels, comprising: a plurality of potentiometers each having an adjustable contact providing a preset voltage; a channel selector switch including at least a plurality of stator contacts corresponding in number to said plurality of potentiometers, each connected to one of said adjustable contacts and a rotor contact connected to said voltage tunable tuner, said channel selector switch thereby providing for coupling of one of said preset voltages to said voltage tunable tuner at each of said plurality of stator contacts; a motor having a shaft coupled to said rotor contact of said channel selector switch; a motor control coupled to said motor for providing energization of said motor; source of bias potential; a first transistor having a base electrode, an emitter electrode coupled to a reference potential, and a collector electrode coupled to said motor control; a second transistor having a base electrode coupled to said source of bias potential, an emitter electrode and a collector electrode; said first transistor and said second transistor being of opposite conductivity tapes; a first resistor; a second resistor; said first resistor and said second resistor being coupled in a series combination and having a common terminal; said series combination being coupled between said collector of said second transistor and said reference potential; said base terminal of said first transistor being coupled to said common terminal; a unilateral conducting device; said unilateral conducting device coupled between said rotor contact of said channel selector switch and said emitter electrode of said second transistor; said unilateral conducting device being poled for current flow between said base electrode of said second transistor and said rotor contact of said channel selector switch; and a switching signal being produced at said collector electrode of said first transistor when a forward bias current flows between said emitter electrode and said base electrode of said second transistor; said switching signal maintaining energization of said motor.

Claim 7

In a motor driven television receiving tuning apparatus employing a voltage tunable tuner capable of processing signals associated with each of a plurality of signal channels in a band of frequencies, a system for providing selective bypassing of positions of a channel selector switch employed to provide for reception of selected ones of said plurality of signal channels, comprising: a plurality of potentiometers each having an adjustable contact providing a preset voltage; a channel selector switch including at least a plurality of stator contacts corresponding in number to said plurality of potentiometers, each connected to one of said adjustable contacts and a rotor contact connected to said voltage tunable tuner, said channel selector switch thereby providing for coupling of one of said preset voltages to said voltage tunable tuner at each of said plurality of stator contacts; a motor having a shaft coupled to said rotor contact of said channel selector switch; a motor control coupled to said motor for providing energization of said motor; source of bias potential; a first transistor having a base electrode, an emitter electrode coupled to a reference potential, and a collector electrode coupled to said motor control; a second transistor having a base electrode coupled to said source of bias potential, an emitter electrode and a collector electrode; said first transistor and said second transistor being of opposite conductivity tapes; a first resistor; a second resistor; said first resistor and said second resistor being coupled in a series combination and having a common terminal; said series combination being coupled between said collector of said second transistor and said reference potential; said base terminal of said first transistor being coupled to said common terminal; a unilateral conducting device; said unilateral conducting device coupled between said rotor contact of said channel selector switch and said emitter electrode of said second transistor; said unilateral conducting device being poled for current flow between said base electrode of said second transistor and said rotor contact of said channel selector switch; and a switching signal being produced at said collector electrode of said first transistor when a forward bias current flows between said emitter electrode and said base electrode of said second transistor; said switching signal maintaining energization of said motor.