System for controlling tape read-out devices

Claim 1

A system for controlling devices to read out data recorded on a tape, comprising: an instruction signal forming means including an instruction decoding circuit and an instruction storing circuit for storing the output signals from said decoding circuit and producing positive instruction signals; means for receiving the instruction signals and preliminarily setting the direction of traveling of the tape to a direction opposite to the read out direction and subsequently to the read out direction after a predetermined time, said means including a first AND circuit having one input terminal to which said positive instruction signals are supplied, a first inverter for reversing the polarization of said positive instruction signals, a first means for producing positive output signals for time (T1) after said positive instruction signals are supplied thereto, a second AND circuit having one input terminal for receiving the output signals from said first means and the other input terminal for receiving negative output signals from said inverter thereby to produce negative output signals, a second inverter for receiving output signals from said first means, producing negative output signals for said time (T1) and thereafter producing positive output signals, thereby to cause the output signals to be supplied to the other input terminal of said first AND circuit, negative output signals to be produced from said first AND circuit for said time (T1) and positive output signals to be produced from said AND circuit after said time (T1), a first OR circuit for receiving output signals from said first and second AND circuits, producing negative output signals for said time (T1) thereby to set the traveling direction of the tape opposite to that in which it is read out and producing positive output signals after said (T1) thereby to set the traveling direction of the tape equal to that in which it is read out; and a means for starting the tape in the direction set by said direction setting means and stopping the tape after the read out from the tape is finished, said tape starting and stopping means including a second means for producing positive output signals for time (T2) (T1 > OR = T2) when said positive instruction signals are supplied thereto, a third means for producing positive output signals in time (T3) (T3>T1) after said positive instruction signals are supplied thereto, a start/stop flip-flop which is set by the positive output signals from said third means, a second OR circuit for receiving output signals from both said second means and said start/stop flip-flop producing positive output signals at said time (T2) to enable the tape to travel in the direction opposite to the read out direction, thereafter stopping driving the travel of the tape for time (T3 - T2) and again producing positive output signals to cause the tape to travel in the read out direction, a read out control flip-flop for producing positive output signals in time (T4) (T4 > T3) after the positive instruction signals are fed thereto thereby to control the read out operation of data from the tape, a circuit for detecting the completion of one data block of the tape, a fifth means for producing output signals a time (T5) after said stop detecting signals are applied thereto, thereby to reset both said start/stop flipflop and said read out control flip-flop, and a sixth means for producing output signals at time (T6) (T6 > T5) after said stop detecting signals are fed thereto, thereby to reset said instruction storing circuit.

Claim 2

A system for controlling devices to read out data recorded on a tape, comprising: an instruction signal forming means including an instruction decoding circuit and an instruction storing circuit for storing the output signals from said decoding circuit and producing positive instruction signals; means for receiving the instruction signals and preliminarily setting the direction of traveling of the tape to a direction opposite to the read out direction and subsequently to the read out direction after a predetermined time, said means including a first AND circuit having one input terminal to which said positive instruction signals are supplied, a first inverter for reversing the polarization of said positive instruction signals, a first means for producing positive output signals for time (T1) after said positive instruction signals are supplied thereto, a second AND circuit having one input terminal for receiving the output signals from said first means and the other input terminal for receiving negative output signals from said inverter thereby to produce negative output signals, a second inverter for receiving output signals from said first means, producing negative output signals for said time (T1) and thereafter producing positive output signals, thereby to cause the output signals to be supplied to the other input terminal of said first AND circuit, negative output signals to be produced from said first AND circuit for said time (T1) and positive output signals to be produced from said AND circuit after said time (T1), a first OR circuit for receiving output signals from said first and second AND circuits, producing negative output signals for said time (T1) thereby to set the traveling direction of the tape opposite to that in which it is read out and producing positive output signals after said (T1) thereby to set the traveling direction of the tape equal to that in which it is read out; and a means for starting the tape in the direction set by said direction setting means and stopping the tape after the read out from the tape is finished, said tape starting and stopping means including a second means for producing positive output signals for time (T2) (T1 > OR = T2) when said positive instruction signals are supplied thereto, a third means for producing positive output signals in time (T3) (T3>T1) after said positive instruction signals are supplied thereto, a start/stop flip-flop which is set by the positive output signals from said third means, a second OR circuit for receiving output signals from both said second means and said start/stop flip-flop producing positive output signals at said time (T2) to enable the tape to travel in the direction opposite to the read out direction, thereafter stopping driving the travel of the tape for time (T3 - T2) and again producing positive output signals to cause the tape to travel in the read out direction, a read out control flip-flop for producing positive output signals in time (T4) (T4 > T3) after the positive instruction signals are fed thereto thereby to control the read out operation of data from the tape, a circuit for detecting the completion of one data block of the tape, a fifth means for producing output signals a time (T5) after said stop detecting signals are applied thereto, thereby to reset both said start/stop flipflop and said read out control flip-flop, and a sixth means for producing output signals at time (T6) (T6 > T5) after said stop detecting signals are fed thereto, thereby to reset said instruction storing circuit.

Claim 4

A system for controlling devices to read out data recorded on a tape comprising: an instruction signal forming means including instruction decoding circuits to which input signals are fed and an instruction storing circuit for storing output signals from said decoding circuit to produce positive instruction signals; a means for receiving the instruction signal and setting the direction of travelling of the tape to the read-out direction at the time of starting the read-out and to the direction opposite to the read-out direction a predetermined time after the read-out is finished, and a means for starting the tape in the direction set by said direction setting means at the time of starting the read-out, stopping the tape travelling after the read-out of data from the tape is finished, starting the tape travelling in the direction opposite to the read-out direction for a period corresponding to the time when the tape travelling is set in the direction opposite to the read-out direction and finally stopping the tape travelling including a first AND circuit having one input terminal to which said positive instruction signals are applied, a first inverter for reversing the polarity of said positive instruction signals, a first means for producing positive output signals for time (T1) after said Tape is stopped and producing negative output signals for other periods than said time (T1), a second AND circuit having one input terminal receiving the output signals from said first means and the other input terminal receiving the output signals from said first inverter thereby to produce negative signals continuously, a second inverter for reversing the polarity of the output signals from said first means and applying the inverted output signals to the other input terminal of said first AND circuit thereby to cause the AND circuit to produce positive output signals for periods other than said time (T1), a first OR circuit for receiving output signals from both said first and second AND circuits producing positive output signals for periods other than said time (T1) thereby to set the travelling direction of the tape to the read out direction and producing negative output signals for time (T1) thereby to set the traveling direction of the tape opposite to the read out direction, a start/stop flip-flop which is set by the impression of the positive instruction signal from said instruction storing circuit, a second OR circuit for causing the tape to first travel in the read out direction on application of the output signals from said flip-flop, a fourth means for producing output signals for a time (T4) after the positive instruction signals are supplied thereto, a read out control flip-flop which is set by output signals from said fourth means, thereby to control the read out operation from the tape, a stop detecting circuit for detecting the completion of the read out of one data block from the tape and producing stop detecting signals by which said flip-flops are reset thereby to stop driving of the tape, a fifth means for producing output signals at time (T5) after said stop detecting signals are supplied thereto, these output signals being fed to said first means to cause said means to produce positive output signals for time (T1), thereby to set the travelling direction of the tape opposite to the read out direction, a second means for receiving output signals from said fifth means producing positive output signals for time (T2) (T1 > or = T2) after which the tape is stopped thereby to cause the tape to travel in the direction opposite the read out direction and finally to stop the tape travelling, and a sixth means for producing output signals in time (T6) (T6 > or = T5 + T2) after said stop detecting signals are supplied thereto, and resetting the instruction storing circuit by the output signals thereof.

Claim 5

A system for controlling devices to read out data recorded on a tape comprising: an instruction signal forming means including instruction decoding circuits to which input signals are fed and an instruction storing circuit for storing output signals from said decoding circuit to produce positive instruction signals; a means for receiving the instruction signal and setting the direction of travelling of the tape to the read-out direction at the time of starting the read-out and to the direction opposite to the read-out direction a predetermined time after the read-out is finished, and a means for starting the tape in the direction set by said direction setting means at the time of starting the read-out, stopping the tape travelling after the read-out of data from the tape is finished, starting the tape travelling in the direction opposite to the read-out direction for a period corresponding to the time when the tape travelling is set in the direction opposite to the read-out direction and finally stopping the tape travelling including a first AND circuit having one input terminal to which said positive instruction signals are applied, a first inverter for reversing the polarity of said positive instruction signals, a first means for producing positive output signals for time (T1) after said Tape is stopped and producing negative output signals for other periods than said time (T1), a second AND circuit having one input terminal receiving the output signals from said first means and the other input terminal receiving the output signals from said first inverter thereby to produce negative signals continuously, a second inverter for reversing the polarity of the output signals from said first means and applying the inverted output signals to the other input terminal of said first AND circuit thereby to cause the AND circuit to produce positive output signals for periods other than said time (T1), a first OR circuit for receiving output signals from both said first and second AND circuits producing positive output signals for periods other than said time (T1) thereby to set the travelling direction of the tape to the read out direction and producing negative output signals for time (T1) thereby to set the traveling direction of the tape opposite to the read out direction, a start/stop flip-flop which is set by the impression of the positive instruction signal from said instruction storing circuit, a second OR circuit for causing the tape to first travel in the read out direction on application of the output signals from said flip-flop, a fourth means for producing output signals for a time (T4) after the positive instruction signals are supplied thereto, a read out control flip-flop which is set by output signals from said fourth means, thereby to control the read out operation from the tape, a stop detecting circuit for detecting the completion of the read out of one data block from the tape and producing stop detecting signals by which said flip-flops are reset thereby to stop driving of the tape, a fifth means for producing output signals at time (T5) after said stop detecting signals are supplied thereto, these output signals being fed to said first means to cause said means to produce positive output signals for time (T1), thereby to set the travelling direction of the tape opposite to the read out direction, a second means for receiving output signals from said fifth means producing positive output signals for time (T2) (T1 > or = T2) after which the tape is stopped thereby to cause the tape to travel in the direction opposite the read out direction and finally to stop the tape travelling, and a sixth means for producing output signals in time (T6) (T6 > or = T5 + T2) after said stop detecting signals are supplied thereto, and resetting the instruction storing circuit by the output signals thereof.