Tape recorder with a voice signal responsive circuit

Claim 2

A tape recorder for use with a power source comprising a tape recorder circuit; a motor circuit; an on-off switch that connects or disconnects the power source; a semiconductive switching circuit arranged to be enabled but otherwise unactuated in response to the on-off switch; a sound actuating circuit responsive directly to the on-off switch and, on the basis of sound input received, actuates and deactuates the motor circuit and starts and stops the recorder circuit; an auto-off circuit arranged to be enabled in response to both said on-off switch and said switching circuit being on for detecting tape travelling to its end and for producing a stop signal to stop the operation of the recorder circuit and motor circuit; and a switching arrangement that serves to actuate the semiconductive switching circuit in response to one of the sound actuating circuit and the auto-off circuit so that either said sound actuating circuit can turn the switching circuit on and off or said auto-off circuit can turn the switching circuit off.

Claim 3

A tape recorder as set forth in claim 1, wherein the above-mentioned sound actuating circuit comprises a microphone, an amplifying circuit and a rectifier circuit which regulates the output from the above-mentioned amplifier.

Claim 4

A tape recorder as set forth in claim 1, wherein the above-mentioned auto-off circuit includes a pulse generator which generates pulses in accordance with the tape travel amount and a retriggerable multi-vibrator circuit which works the pulse as input.

Claim 5

A tape recorder, comprising: a recording apparatus having a tape recorder mechanism including a motor; an on-off switch; a voice signal responsive device operable when said switch is closed for producing a go signal in response to a voice signal and for producing a stop signal in response to absence of a voice signal; a switching arrangement operable when said switch is closed and coupled to the recording apparatus for turning said recording apparatus on in response to a go signal and turning said recording apparatus off in response to a stop signal; an auto-off arrangement operable when both said switch and said switching arrangement are closed and responsive to operation of the mechanism for producing a go signal when tape is being advanced and a stop signal when tape has reached its end; switch means for alternately connecting said auto-off arrangement and said voice signal responsive device to said switching arrangement so that said switching arrangement responds either to the auto-off arrangement or to said voice signal responsive device to turn said recording apparatus on and off.

Claim 6

A tape recorder, comprising: a recording apparatus having a tape recorder mechanism including a motor; an on-off switch; a voice signal responsive device operable when said switch is closed for producing a go signal in response to a voice signal and for producing a stop signal in response to absence of a voice signal; a switching arrangement operable when said switch is closed and coupled to the recording apparatus for turning said recording apparatus on in response to a go signal and turning said recording apparatus off in response to a stop signal; an auto-off arrangement operable when both said switch and said switching arrangement are closed and responsive to operation of the mechanism for producing a go signal when tape is being advanced and a stop signal when tape has reached its end; switch means for alternately connecting said auto-off arrangement and said voice signal responsive device to said switching arrangement so that said switching arrangement responds either to the auto-off arrangement or to said voice signal responsive device to turn said recording apparatus on and off.

Claim 7

A recorder as in claim 4, wherein said voice signal responsive device includes an amplifier and a microphone coupled to said amplifier, and wherein said voice signal responsive device includes a rectifier coupled to said amplifier.

Claim 8

A recorder as in claims 4 or 5, wherein said auto-off arrangement includes a pulse generator for generating pulses in response to tape travel and a one-shot multivibrator having a time constant greater than the time between pulses of said pulse generator.

Claim 9

A tape recorder, comprising: a master switch; an auxiliary switch arrangement; a voice signal device for producing, when enabled, on signals during existence of voice signals; a recording apparatus for recording, when enabled, the voice signals; an automatic-off control for producing off signals when enabled; first circuit means for connecting said auxiliary switch arrangement and said voice signal device to said master switch for enabling the auxiliary switch arrangement and said voice signal device with the master switch, and connecting said voice signal device to said auxiliary switch arrangement to operate said auxiliary switch arrangement; and second circuit means for enabling said recording apparatus and automatic-off control with said auxiliary switch arrangement, and forming a loop by connecting the automatic-off control to said auxiliary switch arrangement so as to turn said auxiliary switch arrangement off when said automatic-off control is enabled and indicates an off signal; said auxiliary switch arrangement including a semiconductor switch enabled by said main switch and a selector switch for connecting the semiconductor switch into said first circuit means so as to respond to the voice signal or into said second circuit means to respond to said automatic-off control.

Claim 10

A tape recorder, comprising: a master switch; an auxiliary switch arrangement; a voice signal device for producing, when enabled, on signals during existence of voice signals; a recording apparatus for recording, when enabled, the voice signals; an automatic-off control for producing off signals when enabled; first circuit means for connecting said auxiliary switch arrangement and said voice signal device to said master switch for enabling the auxiliary switch arrangement and said voice signal device with the master switch, and connecting said voice signal device to said auxiliary switch arrangement to operate said auxiliary switch arrangement; and second circuit means for enabling said recording apparatus and automatic-off control with said auxiliary switch arrangement, and forming a loop by connecting the automatic-off control to said auxiliary switch arrangement so as to turn said auxiliary switch arrangement off when said automatic-off control is enabled and indicates an off signal; said auxiliary switch arrangement including a semiconductor switch enabled by said main switch and a selector switch for connecting the semiconductor switch into said first circuit means so as to respond to the voice signal or into said second circuit means to respond to said automatic-off control.