Touch-responsive oscillator-controlled circuit

Claim 2

Electric control device comprising a relaxation oscillator having a series circuit comprising a first resistor, a neon tube, and a second resistor and a first capacitance connected across the neon tube, a source of direct current potential connected across said series circuit, a pair of cOntacts adapted to be bridged by manual contact to provide a resistive impedance across said contacts to prevent said first capacitance from reaching the breakdown voltage of the neon tube, and having a third resistance and a second capacitance connected thereacross in series, said second capacitance being connected in parallel with said neon tube and second resistance, and an oscillation sensing device adapted to develop a signal voltage only upon the presence of oscillations, said device comprising a third capacitance and a fourth resistor in series, connected in parallel with said second resistance, and a diode and fourth capacitance connected in series, and across said fourth resistance, and signal indicating terminals connected across said fourth capacitance, whereby upon manual contact bridging of said contacts to provide a resistive impedance, the voltage across said first capacitance is prevented from rising to the breakdown voltage of said neon tube, and oscillations thereof are blocked to thereby terminate the signal voltage at the terminals.

Claim 3

Electric control device which is to be controlled by the application of a resistive impedance such as the hand, comprising two input terminals which are sufficiently close to each other so as to be shunted by the application of the hand, an oscillator with two opposite output terminals, resistive means for connecting the input terminals to a corresponding one of the two oscillator output terminals, means for feeding said oscillator so as to make it oscillate when the input terminals are not shunted by the application of a resistive impedance such as the one formed by the hand, means including rectifying means for deriving from the oscillator a DC signal, means including a trigger circuit for deriving from the absence of said DC signal an electric control signal, said oscillator essentially comprising a neon tube shunted by a condenser, this shunt combination being connected by one end to one pole of a DC source through a feed resistor and by the other end to the other pole of said DC source through a load resistor, rectifying means connected to the load resistor, an element having a time constant connected to the rectifying means, an amplifying stage connected to the time constant element, a relay in series with a blocking gate, a condenser loaded by a DC source, and means for connecting the output of the amplifying stage to the blocking element, whereby the blocking element is unblocked when no voltage is applied at the output of the amplifying stage.

Claim 4

Electric control device which is to be controlled by the application of a resistive impedance such as the hand, comprising two input terminals which are sufficiently close to each other so as to be shunted by the application of the hand, an oscillator with two opposite output terminals, resistive means for connecting the input terminals to a corresponding one of the two oscillator output terminals, means for feeding said oscillator so as to make it oscillate when the input terminals are not shunted by the application of a resistive impedance such as the one formed by the hand, means including rectifying means for deriving from the oscillator a DC signal, means including a trigger circuit for deriving from the absence of said DC signal an electric control signal, said oscillator essentially comprising a neon tube shunted by a condenser, this shunt combination being connected by one end to one pole of a DC source through a feed resistor and by the other end to the other pole of said DC source through a load resistor, rectifying means connected to the load resistor, an element having a time constant connected to the rectifying means, an amplifying stage connected to the time constant element, a relay in series with a blocking gate, a condenser loaded by a DC source, and means for connecting the output of the amplifying stage to the blocking element, whereby the blocking element is unblocked when no voltage is applied at the output of the amplifying stage.