Electronic organ with rhythm attachment employing selective operation of conventional or rhythmic sounds

Claim 3

The method according to claim 1 in which the individual pulses of gate opening voltage supplied to the control terminals of the respective gates are of respectively different duration.

Claim 4

The method according to claim 1 in which the individual pulses of gate opening voltage supplied to the control terminal of the gate for the accompaniment manual are of shorter duration than those supplied to the control terminal of the gate for the pedal clavier.

Claim 5

In combination; key controlled signal source means operable to develop electric tone signals, tone signal receiver means including electroacoustic means operable to convert the tone signals to sound, gate means having input terminal means connected to the output side of said signal source means and output terminal means connected to the input side of said signal receiver means, said gate means having control terminal means and varying in impedance in conformity with variations in voltage at said control terminal means, means forming a source of voltage pulses which occur in selectable predetermined repetitive rhythmic patterns, monostable multivibrator means having output terminal means connected to the control terminal means of said gate means, said multivibrator means having trigger terminal means connected to said source of voltage pulses, a source of bias voltage which will hold said multivibrator means in one state when supplied to the said trigger terminal means thereof, said one state of said multivibrator means being that state in which the voltage supplied to said control terminal means makes the impedance of the said gate means low, and switch means connected between said source of bias voltage and said trigger terminal means and in one position connecting said source of bias voltage to said trigger terminal means to hold said multivibrator means in said one state and in another position disconnecting said source of bias voltage from said trigger terminal means thereby releasing said multivibrator means to the control of pulses supplied thereto from said source of voltage pulses for rhythmic changes of state of said multivibrator means, said multivibrator means when under the control of said voltage pulses from said source of voltage pulses causing the impedance of said gate means to alternate between high and low values in conformity with the pattern of said voltage pulses.

Claim 6

In combination; key controlled signal source means operable to develop electric tone signals, tone signal receiver means including electroacoustic means operable to convert the tone signals to sound, gate means having input terminal means connected to the output side of said signal source means and output terminal means connected to the input side of said signal receiver means, said gate means having control terminal means and varying in impedance in conformity with variations in voltage at said control terminal means, means forming a source of voltage pulses which occur in selectable predetermined repetitive rhythmic patterns, monostable multivibrator means having output terminal means connected to the control terminal means of said gate means, said multivibrator means having trigger terminal means connected to said source of voltage pulses, a source of bias voltage which will hold said multivibrator means in one state when supplied to the said trigger terminal means thereof, said one state of said multivibrator means being that state in which the voltage supplied to said control terminal means makes the impedance of the said gate means low, and switch means connected between said source of bias voltage and said trigger terminal means and in one position connecting said source of bias voltage to said trigger terminal means to hold said multivibrator means in said one state and in another position disconnecting said source of bias voltage from said trigger terminal means thereby releasing said multivibrator means to the control of pulses supplied thereto from said source of voltage pulses for rhythmic changes of state of said multivibrator means, said multivibrator means when under the control of said voltage pulses from said source of voltage pulses causing the impedance of said gate means to alternate between high and low values in conformity with the pattern of said voltage pulses.

Claim 7

A combination to claIm 4 which includes pulse shaping network means connected between the output terminal means of said monostable multivibrator means and said control terminal means of said gate means.

Claim 8

A combination according to claim 4 in which said key controlled signal source means comprises at least two signal sources, said gate means comprising a gate connected between the output side of each said signal source and said signal receiver means, said control terminal means comprising a control terminal for said gate, said multivibrator means comprising a multivibrator for each said gate, said output terminal means comprising an output terminal for each said multivibrator connected to the control terminal of the respective gate, said trigger terminal means comprising a trigger terminal for each said multivibrator connected to said source of voltage pulses, and said switch means comprising a switch between each trigger terminal and said source of voltage pulses.

Claim 9

A combination according to claim 6 which includes means for supplying respectively different patterns of voltage pulses from said selected patterns thereof to the respective trigger terminals of said multivibrators.

Claim 10

A combination according to claim 1 in which said signal source means comprises the solo manual and the accompaniment manual and the pedal clavier of an electronic organ and said signal receiver means comprises the electroacoustic system of the organ, said gate means comprising a first gate connecting the output from said accompaniment manual to said electroacoustic system and a second gate connecting the output from said pedal clavier to said electroacoustic system, said control terminal means comprising a respective multivibrator for each gate and each having a respective trigger terminal, said switch means comprising a switch connecting each said trigger terminal to said source of biasing voltage, means connecting each trigger terminal to said source of voltage pulses, and each said multivibrator having a respective output terminal connected to the said control terminal of the respective gate.

Claim 11

A combination according to claim 8 which includes means for supplying respectively different rhythmic patterns of pulses from said source of voltage pulses to the respective trigger terminals of said multivibrators.

Claim 12

A combination according to claim 9 in which said source of voltage pulses comprises a rhythm unit having voltage pulse generating means, a plurality of terminals to which said voltage pulses are supplied according to selectable predetermined repetitive patterns, and circuit means including terminal isolating diodes connecting selected ones of said plurality of terminals to each said trigger terminal of said multivibrators.