SU1131996A2 - Permutation lock - Google Patents

Abstract

CODE LOCK on author. St. No. 1106888, characterized in that, in order to increase secrecy, it contains a delay element and a trigger, where the input of the delay element is connected to the control unit and the code fixing unit, the output is connected to the first trigger input, the second, which input is connected to the decoder, and the output - to the block fixing code. (L with so; about od

Description

This invention relates to combination locks.

According to the main author. St. No. 1106888 known code lock 1.

The disadvantage of this lock is low secrecy, due to the rapid selection of the code.

The purpose of the invention is to increase the secrecy of the castle.

The goal is achieved by the fact that the code lock has a delay element and a trigger, with the input of the delay element connected to the control unit and the code fixing unit, the output connected to the first trigger input, the second input of which is connected to the decoder, and the output to the code fixing unit.

The drawing shows a block diagram of the device.

The device consists of a switch 1, a code setting unit 2, a code fixing unit 3, an execution unit 4, a display unit 5, a control unit 6, a generator 7, a code dialing counter 8, a decoder 9, a distributor 10, a delay element 11, a trigger 12.

The device works as follows.

When the power is turned on, the device is reset. The generator 7 generates pulses arriving at the counter 8 dialing code. On the display unit 5, the signs formed by the code set counter 8 are sequentially displayed. Simultaneously from the outputs of the counter 8, the signals through the decoder 9 are fed to the input of the code setting unit 2, the switches of which are set to the corresponding position. With successive operations of block 3 of code fixing at the moments of indication of necessary code symbols, the corresponding permitting signals arriving at the inputs of switch 1 appear at the output of distributor 10. A signal from the output of code setting block 2 also arrives at the second inputs of switch 1.

When successive presses of the pushbutton switch of the control unit 6, at the time of displaying the necessary code digits, signals appear at its second output, which are fed to the distributor 10. At the first outputs of the distributor 10, the enabling signals that arrive at the second inputs of the switch 1 appear sequentially. One of the first inputs of the switch 1 also receives a signal from the outputs of the code setting unit 2. When 5 signals coincide at the first and second inputs of the switch, respectively, a signal appears at its output, which is fed to the input of block 3. Then, the pulse from the first output of block 6 also receives an enable signal from the output of trigger 12 to the counter of block 3 unit (the next character of the code is typed correctly). After that, by the delayed signal element 11, the trigger 12 is set to "O" and from its output to the input of block 3 receives a inhibit signal, which leads to blocking of comparison of the characters of the input and reference codes. After some time, the signal from the additional output of the decoder 9, the trigger 12 is set to "1,

which provides a comparison of characters. 0

After dialing all the necessary code characters at the output of block 3, a signal arrives at the input of the execution unit 4, to the second input of which

5 signal from the distributor 10. When these signals coincide, the execution unit 4 is activated. The activation of the actuating unit 4 is carried out by pressing the switch of the control unit 6, and a unit is added to the counter of the distributor 10.

0 At the third output of the distributor 10, a inhibit signal is set and a signal from the second output of the distributor 10, the block 3 is set to zero.

If not all the code characters are correctly typed, 5, the execution unit 4 does not work, since from the output of block 3 it will receive a prohibitory signal (logical “O).

Thus, after entering the sign, blocking the input of subsequent code digits occurs until the start of the next cycle of recalculation of the code set counter. This, firstly, leads to an increase in code dialing time, and secondly, users will set codes with either 5 likelihoods with increasing digit values, or with an arbitrary digit order (for example, 5,4,1) , which leads to increased secrecy of the castle.

Claims (1)

CODE LOCK by ed. St. No. 1106888, characterized in that, in order to increase security, it contains a delay element and a trigger, and the input of the delay element is connected to the control unit and the code fixing unit, the output is connected to the first input of the trigger, the second input of which is connected to the decoder, and the output is to the code lock block. > about