SU1246397A2 - Device for testing keyboard of telegraph apparatus - Google Patents

Abstract

The invention relates to telegraphy. The device contains a pulse generator 1, an electronic distributor 2, a binary counter (DC) 3, - a block of power amplifiers with actuating electromagnets 4, elements And 5 and 8, reprogrammable. The remaining storage unit (PZZB) 6, the equivalence elements 7, the memory elements with indication 9, the adjustable resistor 10 and the keyboard keys (CC) 11. Before starting the test on the info. the inputs of the PZZB 6 are recorded a sequence of code combinations that must be formed by QC 11 to fully control its correct operation. DS 3 generates at its outputs the address of the next code combination, which is fed to the address inputs of the PZB 6. Formed code codes PZZB 6 With information. the outputs go to the inputs of equivalence elements 7, where the codes of PTSB 6 and QC 11 are compared. When the codes coincide, pulses are generated, coming through the elements of And 8 and 5 to the memory elements with indication 9, where the symbol of the tested combination is highlighted. The goal is achieved by the introduction of the PZZB 6. 1 or 4 Additional to the author. St. No. 1169187.; 9 (L r-m gh

Description

one

The invention relates to telegraphy and can be used for controlling the operability of electronic and mechanical keyboards of telegraph devices and is an improvement of the device according to the author. St. No. 1169187,

The purpose of the invention is to expand the functionality of the test keyboards that form various telegraph codes.

The drawing shows a structural electrical circuit of the proposed device,

ycTpo icTBO for testing telegraph keyboards contains 1 pulse generator, electronic distributor 2, binary counter, 3, /

block 4 of power amplifiers with actuating solenoids, elements AND 5, reprogrammable Permanent Storage Unit 6, equivalence elements 7, additional element AND 8, memory elements 9 with indication, adjustable resistor 10 and keyboard keys 11.

The device is running; in a good way.

When the device is operating, the pulses from the output of the generator 1 of the pulses arrive at the control input of the electronic distributor 2 and the input of the binary counter 3, switching them simultaneously. The number of output distributor 2 is equal to the number of keys on the keyboard 11 (t). The pulses -C of the outputs of the electronic distributor 2 are successively fed to the inputs of the power amplifier unit 4 with executive electromagnets (the activation of the electromagnets connected at the outputs of the amplifiers), and the sequence of operation is determined by switching the outputs of the electronic distributor 2..The electromagnets press their keys to the keys keyboard 11. When the keys of the keyboard 11 are triggered, an n-element parallel code is formed at the output, corresponding to the symbol of the pressed key of the keyboard 11, co -. This is a combination of logical O and 1 with the output of each bit on a separate bus, the number of which is equal to p. Each bus is connected to one of the inputs of the equivalence elements 7. Before starting the test in the reprogrammable Permanent Memory Unit 6 with information inputs

)

five

Dov L) D records a sequence of code combinations that the keys of the keyboard 11 must form to fully control its correct operation. The binary counter 3 generates at its outputs the address of the next code combination that arrives at the address inputs of the reprogrammable Permanent Storage Unit 6, Generated code combinations of the reprogrammable Permanent Storage Unit 6 from the information outputs Q are fed to the inputs of the equivalence elements 7, where bitwise comparison of the code of the reprogrammable Permanent Storage Unit 6 corresponding to the combination that should be and the code generated by the keys of the keyboards s 11, When the codes at the outputs of the equivalence elements 7 coincide, pulses are generated, arriving at the inputs of the additional element AND 8. When you combine the combinations along all the p-values, an impulse arrives at one of the inputs of the elements AND 5, the number of which is equal to the number

0 combinations generated by the keyboard keys 11. The second inputs of the And 5 elements receive pulses from the outputs of the electronic distributor 2, allowing the signal to pass only to one And 5 element corresponding to the pressed keyboard key 11, Impulse, appearing at the output of one of the elements And 5, enters .in memory element 9 with indication where

Q displays the symbol of the combination being tested. After successively pressing all the keys of the keyboard 11, the symbols of the combinations correctly formed by the keys of the key 5 11 11 are displayed and the correctness of its operation is monitored. The reset of the memory elements 9 with indication to the initial state can be carried out either manually by the operator or automatically after a certain predetermined time. Adjustable resistor 10 is designed to set the current of the electromagnets, block 4 power amplifiers with executive electromagnets.

5 of the invention formula

A device for testing telegraph keyboards according to aut. St.

0

E 1246397 ..

No. 1169187, characterized block whose inputs are connected

in order to expand the function of the corresponding binary outputs

capabilities by testing the counter, while the outputs of the reprogramming, forming a different temporally constant memory

Legraf codes, a re-5 block is entered into it connected to the corresponding

programmable constant memorized by inputs, equivalence elements.

Claims (1)

55 formula of the invention A device for testing keyboards of telegraph apparatus according to ed. St. z 1246397 4 No. 1169187, characterized in that, in order to expand the functionality by testing keyboards generating various telegraph codes, a re-programmable permanent memory unit is inserted into it, the inputs of which are connected to the corresponding outputs of the binary counter, while the outputs reprogrammable read-only memory block connected to the corresponding inputs of equivalence elements.