SU1256057A1 - Device for searching information on microfilm record - Google Patents

Abstract

The invention relates to automation and computer technology and can be used for information support of design and construction work. The aim of the invention is to increase the speed of information retrieval on microfilm. This goal is achieved by implementing the procedures for recording the microfilm frame numbers into the memory without carrying out the process of searching for them, as well as with the step by step viewing of the microfilm, which allows automatic generation of addresses in the memory block. 1 il. § (L

Description

The invention relates to automation and computing and can be used to provide information to the design structure; torskih works.

The purpose of the invention is to improve the performance of the device.

The drawing shows the block diagram of the device.

The device includes a dantzgx input unit 1, the first group of 2 OR elements, the first register 3, the comparison block 4, the second register 5, the address reading block 6 and the address, the execution unit 7, the target for which: microfilm movement, the first element AND 8, elements 9, the first 10 and the second 11 group of elements AND, the second group 12 elements of SCHI, memory block 13, the third group 14 elements AND, the switch 15 reversible counter 16, the decoder 17, the trigger 18 and the second element I19.

Positions 20–25 mark the first second, third, quarter, fifth, and sixth inputs of the device.

The device searches for the necessary information located on the Cyrillic1, at the address entered by the operator using block I, and records the addresses that are not needed for further operation in block 13 in the following HO-IX modes:

1. Record the address in block 13 after conducting an information search,

2. Record the address in block 13 after entering it with the help of block 1.

3. Record the address in block 13 with nouiai OBOM microfilm viewing (microfilm view mode). In this case, the address can be written into block 13, the address dialing process using the block,

The device works as follows.

In order to search for the necessary information placed on the microfilm, the operator, using block 1, enters the address of the frame to be filled and switches on block 7 by the Turn on signal from input 23 of the device. The code of the requested frame is received through the OR elements 2 into register 3, the address code of the microfilm frame is read by block 6, in which we can use a photoelectric converter, and enter register 5. In block 4, the codes of addresses received from registers 3 are compared and 5. When

0

20

25

the codes coincide, block 4 generates a signal Equals, which turns off block 7, and also goes to one of the inputs of the element. And 8.

In the process of operation, after viewing the frame being blocked, it may be necessary to return to the information on this frame of the microfilm. In this case, the device allows you to re-search this frame without a secondary address set using block 1. By the signal Z.apis from input 20 and the signal Equal to block 4, which arrive at the 5 inputs of the And 8 element, at its output. a signal is generated, coming through the element OR 9 to the control input of the elements AND 10. With this signal, the address code from the register 3 is sent through the elements 10 and the elements 1 2 2 on. input of block 3; Simultaneously, the signal 3 from input 20 through the enable signal at input 21 is fed through switch 15 to the counting input of the reversible counter 16, the switch is used to route signals through one of two channels. Accordingly, the number of the counter 16 on the decoder 17 appears a signal by which the register number 3 code is recorded in the cell of block 13. The selected microfilm frames are accessed by the enable signal at the input 22 of the device. 35 By signal Record from input 20 and the enable signal at input 22, the address recorded in block 13 through elements 11 and elements OR 2 is rewritten into register 3. Then this number is compared in block 4 with the numbers found in register 5 that go to the output of block 6 until the appearance at the output of block 4 of the signal Equals. In this case, the signal recording from the device input 20 passes through the switch 15 to the reversing input of counter 16 and reduces its content by one. The selection of each subsequent microfilm frame is -50 s.

It should be understood that the Turn on signal from input 23 sets the trigger 18 to the state that prohibits the passage of the signal from input 20 55 through the second element And 19. Consequently, outside it is forbidden to pass the address code from register 5 through the elements And 14 and or 12 in block 13.

thirty

40

The second mode of operation of the device allows the operator to record in the block 13 the address of the microfilm frame with the help of block 1, mine the search stage. This situation arises when, after a certain period of work of the operator with information on microfilm, he is required to retract to frames whose addresses are known. The address code of the frame from block 1 enters through the elements OR 2 and register 3 to the information input of elements 10. The signal from input 25 through the OR 9 element is fed to the enable input of the AND 10 elements. As a result, the address code from register 3 through the AND 10 and OR 12 elements is fed to the input of block 13. The address code is written to a specific cell of block 13 by the signal Record from input 20 and p The resolution signal at input 21 is similar to that described.

In the third mode of operation of the device, a signal from the input 24 is used to view the information contained on the microfilm. In the case when the information on the frame being viewed is needed by the operator for further work, the address of this frame of the microfilm is recorded in block I3 without the address being set using block 1.

The signal from the device input 24 sets the trigger 18 to a state that permits the passage of the signal from input 20 through the AND 19 element to the control input of the AND 14 elements, therefore the number from register 5 through the OR 12 elements is fed to the input of block 13.

The signal at input 20 is applied after stopping the movement of the microfilm, which is accomplished by stopping the signal at the fifth input 24 of the device.

Claims (1)

Invention Formula A device for searching information on microfilm comprising a switch, whose input is the first, second and third inputs of the device. and the outputs are connected to the inputs of the reversible counter, the output of which is connected to the decoder, the first register, the outputs of which are connected to one input of the AND elements of the first group and the comparison unit, the output of which is connected to one input of the first And element, the other input of which The first input device and the first input of the optional unit, the second and third inputs of which are the fourth and fifth inputs of the device, the memory block, the 0DAYS of which are connected to the 5 outputs of the decoder, the others are the second and third the inputs of the device and the output are connected to one input of elements AND of the second group, the other inputs of which are the first input of the device, the second AND element, one input of which is the first input of the device, and the input and address reading blocks, characterized in that , in order to improve the speed of the device, it contains the first group of OR elements, the inputs of which are connected to the outputs of the data input unit and the AND elements of the second group, 0 and the outputs are connected to the inputs of the first register, the trigger, whose inputs are the fourth and fifth inputs of the device, and the output is connected to another input of the second element AND, the second register, whose inputs are connected to the outputs of the address reading unit, and the outputs are connected to other the inputs of the comparison block, the third group of elements AND, whose inputs are connected to the outputs of the second register and the second element AND, the second group of elements OR, whose inputs are connected to the inputs of the corresponding elements AND of the first and third groups, and The 5 outputs are connected to the corresponding inputs of the memory block, the OR element, one input of which is the sixth input of the device, another input is connected to the output of the first AND element, 0 and the output of the element OR is connected to another input of the elements AND of the first group. B20 ,/four 21 bb2Z Editor A.Vorovich Compiled by T.Nichiporovich Tehred M. Khodanich Proofreader T. Kolb Order 4826/50 Circulation 671. Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d, 4/5 Production and printing company, Uzhgorod, Projecto st., 4