SU1074420A3 - Information output apparatus - Google Patents

Abstract

1469586 Printers INTERNATIONAL BUSINESS MACHINES CORP 11 Nov 1974 [26 Dec 1973] 48622/74 Heading G4H A serial printer comprises a movable print element mounted on a carrier itself movable past a plurality of print positions along a print line of a document, the print element having two or more arrays of type characters, each array containing all of a group of commonly used characters and part of a group of less frequently used characters, the print element and carrier being driven so that normally only one of the arrays is presented to a particular print position and other arrays are presented to successive adjacent print positions, there being a print hammer operable to effect impact of a selected type character with the document, and means responsive to the positions of the type characters in the arrays and to a character which is to be printed in a particular print position to inhibit drive of the carrier when the character to be printed is not in the next array to be presented to the print position. As disclosed, drive of the carrier is also inhibited if the distance between successive characters to be printed in their respective arrays is not large enough to allow time for hammer recovery. The print element is shown as a wheel of flexible radial tabs but may be a belt or drum instead. Index pulses from the wheel drive a type counter which indirectly drives an array counter, each character to be printed being used together with the array counter output (specifying the next array) to address a look-up table to determine if the character is in the next array and if so its position. The position of the previous character to be printed, stored in a register, is compared with the type counter output to control hammer firing. The positions of these two successive characters are subtracted, and added to the array length, the result being compared with the hammer recovery time. If there is not enough time, or the latter of the two characters is not in the next array, hammer firing is inhibited and the carrier is stopped, until printing can be resumed. Carrier velocity is always the same when the hammer is fired.

Description

The invention relates to automation and computing and is intended to control printing devices.

A device for outputting information is known, comprising a memory block, registers, a counter, AND elements,

The disadvantage of this device is low speed.

The closest technical solution to the invention is an information output device comprising a first memory block connected to a first decoder, serially connected first OR element and first counter, first and second registers Ø.

A disadvantage of this device is the low rate of: rotations.

The purpose of the invention is to increase the speed of the device.

The goal is achieved in that the device comprises a second counter, a second decoder, a first delay element, a second delay element and a first trigger, a second memory block / arithmetic unit and a comparator, a second, third and fourth triggers, And elements, inverters , the third, fourth and fifth registers, the second and third elements OR, the first input of the second element OR is connected to the output of the comparator, the second input - to the output of the first inverter, the third input - to the output of the second inv The output is connected to the first input of the first element I, the second input of which is connected to the output of the second element I, the first input of which is connected to the output of the first register second to the input - to the output of the first counter, the input of the second decoder and the first input of the third element I, the second input of which connected to the output of the third register and the second input of the arithmetic unit, the third input of which is connected to the output of the fourth register, the output of the fifth register is connected to another input of the comparator, the output of the third element And is connected to one input Ohm fourth element And, another input is connected to the output of the third inverter, the input of which is connected to the output of a key, the input of which is connected to the output of the fifth element And whose inputs are connected to the output of the first decoder and two inputs of the sixth element, the third input of which is connected to the output of the second the block .pam, output - with the input of the third register, the inputs of the second memory block are connected to the outputs of the first memory block and the second counter, the output of the first trigger is connected with the inputs of the first IL element

and the second counter, the output of the first delay element is connected to the input of the second trigger, the inputs of the fourth trigger are connected to the outputs of the seventh and eighth elements And, the output 5 to the first input of the ninth And element and the input of the second inverter, the output of the second register element I, the second input of which is connected to the output Yu of the first counter, output r with the second input of the ninth element I, the third input of which is connected to the output of the third element OR and the input of the first inverter, the first input of the third 5th trigger. en with the output of the ninth element And, the second input - with the release of the first element I.

The drawing shows the block diagram of the device.

Q The device contains the first element OR 1, the first counter 2, the second counter 3, the second decoder 4, the first delay element 5, the second delay element 6., the first trigger 5, 7, the second trigger 8, the third element AND 9, the fourth element AND 10, the second block 11, the sixth element And 12, the third register 13, the first memory block 14, the first decoder 15, the fifth element And 16, the key 17, the third inverter 18., the arithmetic unit 19, the comparator 20, the fourth register 21, the fifth register 22 J the seventh element And 23, the eighth element And 24, the fourth trigger 25, 5 the second register 26, the tenth. element And 2 7, the ninth element AND 28, the third element OR 29, the first Inverter 30, the second element OR 31, the first register 32, the second element AND 33, the itep0 element And 34, the third trigger 35, the second inverter 36.

The device works as follows.

The first counter 2 receives 5 marking pulses through the first element OR 1 and the index pulses directly. The index pulses identify the sign on the print wheel, which is located in the print attachment. The output of the first counter 2 is fed to the input of the third element And 9 and then through the fourth element And 10 actuates the printing mallet. The first decoder 15 identifies the gaps between characters filled in the first block of memory 14. With the power of the first element 16, the key 17 and the third inverter 18, the signal from the fourth element 10 is prevented from actuating the printing hammer in case there is a gap between the characters. At the same time marking impulses come on. the input of the second counter 5 3, the output of which by

the second daifferator 4, the first delay element 5 and the second trigger, hera 8, the signal is generated Group 1, the end of the characters, and the second delay element 6 and the first trigger 7 generate the signal Group 2, the end of the characters; In this case, it is assumed that the printing wheel contains two groups of characters. The second memory block 11 receives the output signal from the first memory block 14, which characterizes the code of the character to be printed and the output signal of the second counter (3 groups), which represents the binary code of the print group that is printed on.

At the output of the unit 1, a signal is generated that determines whether the first memory unit contains 14 characters in the next closest one to your group or has, and also issues a position signal that indicates the position of the corresponding sign within that group. This position signal arrives at the sixth element And 12, which controls the third j) master 13, the closest next position of the siac is contained in KOTOpcw. At which the printing should be performed. The output signal of the register goes to the third element 9 and further to the fourth element 10, where it is synchronized with the input signal, which indicates the position of the printing wheel, which is used to control the hammer.

: With this pre-memorized. The input meter is supplied from the second register 26 together with the output signal cm of the first counter 2 to the tenth element I 27 in order to synchronize the starting time of the print wheel. The output signal from the tenth element And 27 goes to the ninth element And 28, which also receives the output signal of the fourth trigger 25, which is set by means of the seventh element And 23. The last input signals are received:. Print data ready, Memory Block not Loaded and Group 2, end. . Reset; the fourth trigger 25 is implemented by the eighth element. And

24, the input signals of which are the signal of Group 1, the end and the signal of the slide run from the third flip-flop 35. At the ninth And 28 element, the signals Do Not Print and Jumper are received.

When pre-memorized input parameter is supplied from the first register 32 to the second AND 33, which receives the output signal

0 of the first. Counter to form a signal to stop the stepper motor of the printing mechanism. The output signal of the second element AND 33 is combined with the signal Press5 and with the output signals of the second element OR 31 and serves to reset the third flip-flop 35. The first inverter 30 inverts the signal from the output of the third element OR 29 and supplies it to the input of the second element OR 31,

0 from the output of which. Through the first element AND 34, the third trigger 35 is reset in the case when there is neither a sign nor a gap. The output of the fourth flip-flop 25 enters through the second inverter 33 to the input of the second element OR 31 so that the third flip-flop 35 can be reset in the case when the fourth flip-flop 25 is cleared.

0 To one input of the comparator 20 comes from the output of p of the register 22, a predetermined perimeter D, which corresponds to the return time. the hammer is in the pre;

5 another input receives the difference (B + C} -A between the sum (B + C) of the output signal (s) of the predetermined fourth register of 21 group lengths and the corresponding position

0 characters of the output signal (c) of the second memory block 11 and the output signal (A) of the third register 13, which corresponds to the nearest next position of the sign. This difference is determined on the arithmetic code 19. If the output signal from the arithmetic unit 19 less than the hammer return time parameter D, the output signal of the comparator 20 through the second element OR .31 and the first element AND 34 returns the third trigger 35 to its initial state, as a result of which the movement of the slide mechanism of the printing mechanism stops.

Claims (1)

DEVICE FOR INFORMATION OUTPUT, containing the first memory block connected to the first lowered by the fractor, the first OR element and the first counter in series, the first and second registers, characterized in that, in order to improve the speed of the device, it contains the second counter in series, the second decoder , the first delay element, the second delay element and the first trigger, the second memory block connected in series, the arithmetic block and the comparator, the second, third and fourth triggers, AND elements, invert ry, third, fourth and fifth registers, second and third elements OR, the first input of the second OR element is connected to the output of the comparator, the second input is the output of the first inverter, the third input is the output of the second inverter, the output is the first input of the first element And, the second input of which is connected to the output of the second element And, the first input of which is connected to the output of the first register, the second input - with the output of the first counter, the input of the second decoder and the first input of the third element And, the second input of which is connected to the output of the third register the second input * of the arithmetic unit, the third input of which is connected to the output of the fourth register, the output of the fifth register is connected to another input of the comparator, the output of the third element And is connected to one input of the fourth element And, the other input of which is connected to the output of the third inverter, the input of which is connected to the output a key whose input is connected to the output of the fifth AND element, the inputs of which are connected to the output of the first desiccator and two inputs of the sixth AND element, the third input of which is connected to the output of the second memory unit, od - with the input of the third register, the inputs of the second memory block are connected to the outputs of the first memory block and the second counter, the output of the first trigger is connected to the inputs of the first OR element and the second counter, the output of the first delay element is connected to the input of the second trigger, the inputs of the fourth trigger are connected to the outputs of the seventh and eighth elements And, the output is from the first input * of the ninth element And and the input * of the second inverter, the output of the second register is connected to the first input of the tenth element And, the second input of which is connected to the output of the first snip, output - to a second input of the ninth AND gate, the third vhod'kotorogo connected to the output of the third OR gate and the entrance * of the first inverter, the first input of the third flip-flop connected to the output of the ninth AND gate, the second input - with the output of the first element I. SU, 1074420