Magnetic recording and reproducing device with speaker cut off when driving system is stopped

Claim 2

A magnetic recording the reproducing device comprising a magnetic tape on which audio signals and stop signals for temporarily stopping tape feed are recorded, a first magnetic head placed opposite to said magnetic tape for picking up the audio signals from the tape and providing an audio signal output at an output terminal thereof, a first transistor with its base connected with the output terminal of said first magnetic head for conducting in response to the audio signals and taking out the audio signals by the collector of said first transistor, a speaker connected to the collector of said first transistor for converting the passed audio signals to voice output, a second magnetic head placed opposite to said magnetic tape for picking up the stop signals from the tape and providing a stop signal output at an output terminal thereof, a second transistor with its base connected to the output terminal of said second magnetic head for conducting in response to the stop signals and taking out the stop signals by the collector of said second transistor, a relay which is connected to the collector of said second transistor for energizing and de-energizing a drive element of said magnetic tape, said relay de-energizing the drive element when said second transistor is in a conducting state, and a diode inserted between the base of said first transistor and the collector of said second transistor for causing said first transistor to be nonconductive when said second transistor is conductive.

Claim 3

A magnetic recording and reproducing device comprising a magnetic tape on which audio signals and stop signals for temporarily stopping tape feed are recorded, a first magnetic head placed opposite to said magnetic tape for picking up the audio signals recorded on said magnetic tape, a first amplifier connected to the output terminal of said first magnetic head for amplifying said picked-up audio signals, a first transistor with its base connected to the output terminal of said first amplifier which conducts in response to said audio signals and takes out said audio signals by the collector of said first transistor, a second amplifier connected to the collector of said first transistor for further amplifying said passed audio signals, a speaker connected to the output terminal of said second amplifier for converting said audio signals to a voice output, a second magnetic head placed opposite to said magnetic tape for picking up the stop signals recorded on said magnetic tape, a third amplifier connected to the output terminal of said second magnetic head for amplifying the picked-up stop signal, a second transistor with its base connected to the output terminal of said third amplifier which conducts in response to said stop signal and takes out said stop signal by the collector of said second transistor, a relay connected to the collector of said second transistor for energizing and de-energizing a drive element of a driving system of said magnetic tape, said relay de-energizing the drive element when said second transistor is in a conductive state, and a Diode inserted between the base of said first transistor and the collector of said second transistor to make said first transistor cut-off by grounding the base of said first transistor through said diode during the conduction of said second transistor, thereby preventing said speaker from producing a discordant voice output which frequency is lower than ordinary audio signals when said driving system is stopped.

Claim 4

A magnetic recording and reproducing device comprising a magnetic tape on which audio signals and stop signals for temporarily stopping tape feed are recorded, a first magnetic head placed opposite to said magnetic tape for picking up the audio signals recorded on said magnetic tape, a first amplifier connected to the output terminal of said first magnetic head for amplifying said picked-up audio signals, a first transistor with its base connected to the output terminal of said first amplifier which conducts in response to said audio signals and takes out said audio signals by the collector of said first transistor, a second amplifier connected to the collector of said first transistor for further amplifying said passed audio signals, a speaker connected to the output terminal of said second amplifier for converting said audio signals to a voice output, a second magnetic head placed opposite to said magnetic tape for picking up the stop signals recorded on said magnetic tape, a third amplifier connected to the output terminal of said second magnetic head for amplifying the picked-up stop signal, a second transistor with its base connected to the output terminal of said third amplifier which conducts in response to said stop signal and takes out said stop signal by the collector of said second transistor, a relay connected to the collector of said second transistor for energizing and de-energizing a drive element of a driving system of said magnetic tape, said relay de-energizing the drive element when said second transistor is in a conductive state, and a Diode inserted between the base of said first transistor and the collector of said second transistor to make said first transistor cut-off by grounding the base of said first transistor through said diode during the conduction of said second transistor, thereby preventing said speaker from producing a discordant voice output which frequency is lower than ordinary audio signals when said driving system is stopped.

Claim 5

A magnetic recording and reproducing device comprising a magnetic tape on which audio and first and second control signals are recorded, means for picking up said control signals from the tape and for supplying said control signals to a frequency divider circuit, said frequency divider circuit including a control transistor for conducting in response to said control signals, a first resistor inserted between the collector and base of said control transistor, control windings having primary, secondary and tertiary windings, a second resistor inserted between said primary winding and the base of said control transistor, a first capacitor connected in parallel with said secondary winding, a second capacitor connected in parallel with said tertiary winding, a first terminal led from the collector of said control transistor, a second terminal led from the base of said control transistor and a third terminal led from a junction point between said primary winding and said second resistor, said primary winding being connected to the emitter of said transistor, said secondary and tertiary windings being magnetically connected with said primary winding whereby the parallel arrangement of said secondary winding and said first capacitor provides an output in accordance with the first control signal and the parallel arrangement of said tertiary winding and said second capacitor provides an output in accordance with the second control signal.

Claim 6

A magnetic recording and reproducing device comprising a magnetic tape on which audio and first and second control signals are recorded, means for picking up said control signals from the tape and for supplying said control signals to a frequency divider circuit, said frequency divider circuit including a control transistor for conducting in response to said control signals, a first resistor inserted between the collector and base of said control transistor, control windings having primary, secondary and tertiary windings, a second resistor inserted between said primary winding and the base of said control transistor, a first capacitor connected in parallel with said secondary winding, a second capacitor connected in parallel with said tertiary winding, a first terminal led from the collector of said control transistor, a second terminal led from the base of said control transistor and a third terminal led from a junction point between said primary winding and said second resistor, said primary winding being connected to the emitter of said transistor, said secondary and tertiary windings being magnetically connected with said primary winding whereby the parallel arrangement of said secondary winding and said first capacitor provides an output in accordance with the first control signal and the parallel arrangement of said tertiary winding and said second capacitor provides an output in accordance with the second control signal.