SU1304074A1 - Device for indicating amount of magnetic tape - Google Patents

Abstract

The invention relates to an information accumulation technique and makes it possible to reduce errors in the indication of the amount of magnetic tape. The signal of the end sensor 7 passes through the BANCH element 10 to the reversible counter 1, sets in it a number corresponding to the reading of 0001 m. The signal of the end sensor 7 also goes to the pulse control driver 3, which reverses the movement of the magnetic tape 6 in the tape drive mechanism 4. After reversing the movement of the magnetic tape 6, the driver of the control pulses 3 generates a signal arriving at the reversible counter 1 and a switch 15, and after inverting by the inverter 14 - at the reversing account 17. As a result, reversible counter 1 starts working in the summation mode, and reversible counter 17 - in subtraction mode. The display unit 16 displays the status of the reversible counter 17. The indications of the display unit 16 change from 1030 m to 0002 m. After the end sensor 8 has been triggered, the driver 3 of the control pulses reverses the movement of the magnetic tape in the tape mechanism 4. The reversing counter 1 again starts work in the subtraction mode, and the reversible counter 17 - in the summation mode. 1 hp f-ly, 1 ill. S (L So about 4

Description

one

The invention relates to the accumulation of information, namely, devices for indicating the amount of magnetic tape.

The purpose of the invention is to reduce the error in indicating the amount of magnetic tape.

The drawing shows a device for indicating the amount of magnetic tape.

The device contains a reversible counter 1 connected to the counting and control inputs, respectively, to the output of a succesful counter in the summation mode.

pulse generator 2 and, to the first output of driver control generator 3, connected by the second and third outputs to the tape mechanism 4. The tape mechanism 4 is equipped with

Here, the display unit 16 displays the status of the reversible counter 1, and its readings vary from 0990 m to 0001 m. At the same time, the readings of the additional reversible counter 17 change from 0002. M to

sensor 5 footage of magnetic tape 6, the true amount of magnetic tape 6 in

subway to the entrance of the form-given roll. When reaching block 16

bodies 2 pulses, and the first and second of the con-indication of the readings 0001 m decoder 11

target sensors 7 and 8, the connected generates a signal that stops

the outputs to the inputs of the imager 3 control-account in the reversible counter 1. Appearance

pulses, the inputs of the element And 9 2 indications 0001 m on the display unit 16

and the inputs of the element BAN 10. The output of the ele-means that the length of the magnetic tape 6 in

BAN 10 is connected to the first installed roll exceeds 990 m. At the same time

setting input reversible counter 1 connected to the second setup input to the output element And 9.

The device also contains a decoder 11 connected by inputs to the outputs of the reversible counter 1 and connected by an output to the blocking input of the reversible counter 1, an additional element I 12 connected by the output to the third installation input of the reversing counter 1, an additional element BAN 13, inverter 14, switch 15, display unit 16 and additional reversible counter 17.

An additional element And 12 is connected by the first input to the first output of the driver 3 of control pulses. An additional element BANGE 13 is connected by inputs to the outputs of the first and second end sensors 7 and 8. Inverter 14 under

connected by the input to the first output of the

rotator 3 control pulses. The switch 15 is connected by outputs to the inputs of the display unit 16. An additional reversible counter 17 is connected by a counting input to the output of the pulse former 2 and connected by a first setup input to the output of element 9. The reversible counter 1 outputs are connected to the signal inputs of the switch 15, the other signal inputs of which are connected to the outputs of the additional reversible counter 17 combined control input input to the output of the inverter 14 and connected to the second setup input to the output of the additional element PROHIBIT 13 connected to the second input of the element I 12.

The first output of the driver 3 of the control pulses is median with the control input of the switch 15 directly or through a switch; 1 a switch of 18 display modes.

1304074

connected by the input to the output of the inverter 14.

The indication of the amount of magnetic tape offered by the device is as follows.

When the magnetic tape 6 is moved in the direction from the first end sensor 7 to the second end sensor 8, the reversible counter 1 operates in the subtraction mode, and the additional reversal counter operates in the summation mode.

Here, the display unit 16 displays the status of the reversible counter 1, and its readings vary from 0990 m to 0001 m. At the same time, the readings of the additional reversible counter 17 change from 0002. M to

the true amount of magnetic tape 6 in

new counter 17.

the indications of the display unit 16 do not change until the operation of the first end sensor 7.

The signal of the first end 1-o sensor 7 passes through the element BANGE 10 on the reversible counter 1, sets in it a number corresponding to the indication of 0001 m. In this case, the blocking action of the decoder 11 is removed. The signal of the first end sensor 7 also goes to the driver 3 of the control pulses which reverses the movement of the magnetic tape 6 in the tape mechanism 4.

After reversing the movement of the magnetic tape 6, the driver of the control pulses 3 generates a signal arriving at the reversible counter 1 and the switch 15, and after inverting by the inverter 14, the additional reversing 5

0

five

As a result, the reversible counter 1 starts to operate in the summation mode, and the additional reversible counter 17 - in the subtraction mode. In this case, the display unit 16 displays the state of the additional reversible counter 17. The indications of the display unit 16 vary from 1030 to 0002 m. After the second end sensor 8 triggers, the control pulse shaper 3 reverses the movement of the magnetic tape in the tape drive mechanism 4. In this case, the reversible counter 1 starts working again in subtraction mode, and the additional reversible counter in summation mode.

Claims (2)

1. A device for indicating the number of magnetic tape containing a reversible counter connected to the counting and control inputs respectively to the output of the pulse former and to the first output of the control pulse former connected to the tape drive mechanism equipped with a tape meter of the magnetic tape connected the output to the input of the pulse driver, and the first and second end sensors connected by outputs to the driver inputs of the control unit, Q are connected to the signal inputs of the transducer pulses, the inputs of the element And and the inputs of the element BANGE, the output of which is connected to the first installation input of the reversible counter connected to the output of the element AND, and the display unit, different from the 15 additional movement of the PROHIBIT that, in order to reduce the error connected to the second input element And display the first and second end sensors, an inverter connected by an input to the first output of the control pulse shaper, a switch connected by outputs to the inputs of the display unit, and an additional reversible counter connected by a counting input to the output of the pulse shaper and connected to the output of the element I by the first setting input, moreover, the outputs of the reversible counter sub-switch, other signal inputs of which are connected to the outputs of an additional reversible counter connected by a control input to the inverter output and connected by a second installation input to a magnetic tape, an additional element connected to the outputs of the reversing counter and connected to the block input of the reversing counter are entered into it, And, connected by the output to the third installation input of the reversible counter and connected by the first input to the fourth output of the units The upa first controller output driver is connected to the control input of the switch. 20 2. The device according to claim 1, characterized in that a display mode switch is inserted into it, through which the first output of the control driver maker is connected to the control input of the switch, equal pulses, an additional element js ° mode switch Operation BANKS, connected by inputs from the output is connected to the output of the inverter. are connected to the signal inputs of the course of the additional element BANGE, connected to the second input of the element AND, the first and second end sensors, an inverter connected by an input to the first output of the control pulse shaper, a switch connected by outputs to the inputs of the display unit, and an additional reversible counter connected by a counting input to the output of the pulse shaper and connected to the output of the element I by the first setting input, moreover, the outputs of the reversible counter sub-switch, other signal inputs of which are connected to the outputs of the additional reversible counter connected to the control input with the output of the inverter and connected with the second installation input to the signal inputs of the additional BAN element connected to the second input of the AND element, and the first output of the driver of control pulses is connected to the control input of the switch. 2. A device according to claim 1, characterized in that a display mode switch is introduced into it, through which the first output of the control driver maker is connected to the control input of the switch,