SU608183A1 - Device for writing information on punched cards - Google Patents

Description

(54) DEVICE FOR PREPARATION OF INFORMATION ON PUNCH CARDS

forming temporary intercalas 10, second comparing unit 12, cola converter 11, perforator 7, printing mechanism 8, reading unit 9 and ne {5th comparison unit 6, which is connected to printing mechanism 8 and reading unit 9 connected to block 10 and code converter eleven,

The device works as follows.

The control unit 5 generates the synchronization and control signals of the memory unit 3, the perforator 7 and the printing mechanism 8.

The information enters the memory unit 3 from the mode selection unit 4 or from the keyboard-1 via the encoder 2 and is stored for the duration of the preparation of one punch card.

By controlling the signal coming from the control unit 5, the transport unit (not shown), realizing the function of transporting the punched cards inside the device and generating signals for tracking the movement of punched cards, sequentially delivers the punched card to the perforator 7, the reader 9 and the printing mechanism 8. The perforator 7 records it on a punched card.

The reading unit 9 implements the function of reading information from the punched card and outputs information signals to the first comparison unit b, the time interval forming unit 10 and the code converter 11.

The first comparator unit b controls the identity of the information obtained from the reader unit 9 and from the memory unit 3 using the character-by-character comparison method. If the character codes match, the command from the comparison block 6 to the printing mechanism 8 provides the printout of this symbol on the punch card. In case of a mismatch of codes, the comparison unit 6 generates an error signal, which is fed to the control unit 5 to generate an error signal.

Control of the accuracy of the location of the holes on the punch card occurs simultaneously with the process of comparing character codes and is based on the principle of measuring and comparing the intervals between the reference times of the movement of the punch card and the reference points of the time diagram of the device.

The sequence of signals corresponding to the time diagram of the operation of the device {synchronization signals) is generated by the control unit 5 according to the signals for tracking the movement of punch cards coming from the transport unit.

The reference points in time for the movement of the punched card are the moments of the passage and the reading unit 9 of the front punch card and the front edge of the wipe.

The time interval forming unit 10 converts into a discrete (analog) code time interval between the passage points in the reading unit 9 of the front edge of the hole and the arrival of the next clock signal from the control unit 5. This time interval corresponds to the distance from the front edge of the hole to the column axis.

The code converter 11 converts into a binary (analog) code the time interval between the time the front edge of the punch card of the readout unit 9 passes and stores it for the time of the punch card in the read unit 9. This time interval corresponds to the distance from the front edge of the card to the axis of the first column.

The second comparison block 12 compares the codes received from the time interval forming unit 10 and the code converter 11. The difference of these time intervals is proportional to the displacement of the centers of the holes with respect to the axis of the column. If this penetration is greater than some constant recorded in the selected code in the second comparison block 12, then it produces a bias signal fed to the control unit 5 for generating the control signal. The necessary value of this constant is established in the second block of comparison 12 when setting up the device and can be set manually for a certain period of operation.

Thus, the process of preparing information in the proposed device is implemented in four successive operations:

recording information in a storage device;

transfer of information from a memory device to a punched card

control of the accuracy of perforation and accuracy of the location of the holes on the punched card;

printout of information on a punched card.

The last three operations are performed automatically.

The technical and economic effect of the invention is to improve the quality of the information printed on the punch cards and to increase the efficiency of the work of programmer operators.

Claims (1)

1. US patent No. 3759442, CL. 234-1, 1973. 2 A device for preparing data on punch cards UPP-2M, Specifications 1U1.700.002 - 74.