SU975993A1 - Coded electric lock - Google Patents

Description

The invention relates to coded electric locks.

A code lock is known, containing a dialing unit connected via a serially connected correct dialing register and a time relay with an indication block, a wrong dialing register, additionally connected to the time relay and register,

'correct set shaper · ₁₀

pulses and trigger (^ 1].

The disadvantage of the known lock is the low reliability of operation.

A rise of the invention is ⁵ shenye reliability of actuation.

This goal is achieved by the fact that the code lock containing the dialing unit connected through ₂ o serially connected register of the correct set and time relay with the display unit, the register of the wrong set, additionally under2

The pulse driver and trigger, which is connected to the time relay and the correct dial register, has a counter and logic elements AND, the output of the pulse driver is connected to the pulse input of the counter, the control input of which is connected to the first output of the wrong dial register, and its output is connected to one of the inputs a trigger connected by the outputs to the first inputs of the corresponding AND gates, the second inputs of which are connected to the second output of the wrong set register, the gates of the AND gates, are connected, ootvetstvenno with the control inputs of the time relay and the right set of registers.

The drawing shows a block diagram of a code lock.

The electric lock contains a block 1 on, boron, connected through a serially connected register 2 of the rules 975993 4

the main set and the relay 3 times with the block

4 indications. The device also has an invalid dial register 5 connected to a time relay 3 and a correct dial register 2. Electroza-5 mok includes logic elements And 6, 7, counter 8, trigger 9

and a pulse shaper 10, while the shaper 10 pulse output is connected to the pulse input »0 of the counter 8, the control input of which is connected to the first output of the wrong set of register 5, and its output connected to one of the trigger inputs 9" connected by the outputs of the first 15 the inputs of the corresponding logic elements And 6, 7, the second inputs of which are connected to the second output of the register 5 of the wrong set, you * moves the logical elements And 6, 7 20

are connected, respectively, with the control inputs of the relay 3 time and register 2 correct set.

The dial 1 is a combination of the pushbutton switches 25 for dialing the corresponding code.

Register 2 of the correct set receives the correct code and generates a signal to turn on the relay 3 times. thirty

Register 5 of the wrong set is designed to receive the wrong code and signal the attempts of the wrong dialing of the code.

The _preformer 10 pre- _{E5 pulses is} assigned to set the time interval during which the counting of attempts of incorrect dialing of the code is performed.

Code lock operates as follows. . *

In block 1 of the set, a predetermined sequence of characters is typed. If the sequence is typed correctly, then from register 2 of the correct set, a signal is formed. Rede 3 turns on and sends a signal to the execution unit (not shown).

After the expiration of a certain time required for the stable operation of the executive unit, the time relay 3 is turned off and the signal from the executive unit is removed.

If the sequence of 55 characters is typed incorrectly, then from the register

5 wrong set receives the start signal of the counter 8, which through the open logic element And 7 will turn on-relay 3 times. Relay 3 time triggered and turns on the display unit 4. After some time has elapsed, the relay 3 times shuts off the indication and sets the register 5 to the wrong set to the initial state. When this counter 8 is installed in a certain state. After this, the code lock is ready to receive a new code. The shaper 10 pulses, which after a certain period of time issues a setting pulse to the counter 8, functions independently of the code dialing mode. Thus, the counter 8; at equal intervals of time is reset to its original state. Счет If in the time interval between the installation pulses the counter 8 goes into the zero state, then the trigger 9 will switch, and the next wrong attempt to dial the code will lock the lock.

In this case, the signal from the register 5 of the wrong set through the open logic element and 6 enters the register 2 of the correct set and blocks the reception of the code from the block 1 of the set. Return to the initial state in this case must be done manually.

The lock is also locked when the rate of receipt of incorrect sets of code is greater than the set one, i.e. when deliberate code selection takes place.

The use of the invention will improve the reliability of the lock.

Claims (1)

Claim A code lock containing a dialing unit, connected via a serially connected correct dialing register and a time relay to the display unit, a wrong dialing register, additionally connected to a time relay and a correct dialing register, a pulse driver and a trigger, characterized in that lock, it has a counter and logic elements And, while the output of the pulse shaper is connected to the pulse input of the counter, the control input of which is connected 5 975993 6 with the first register output of the wrong set., and its output is connected to one of the trigger inputs connected by the outputs to the first inputs of the corresponding logic elements Y, the second inputs of which are connected to the second output of the wrong dial register, the outputs of the logic elements AND are connected respectively to the control inputs of the time relay and register the correct set.