SU377837A1 - JS ^^ UNION - Google Patents

Description

DEVICE FOR ALARM ALARM

one

The invention relates to watchdog devices and can be used for signaling when entering closed rooms, in particular, it can be used for signaling when unauthorized persons open doors or KainoTOfi cars.

Known alarm devices, having a switch-on element inside a protected object and containing a distance switch, two electromagnetic relays, parallel-connected block contacts, a time setting the C-circuit, a start switch, diodes and a power switch, automatically activate the alarm through a certain time after the device has been put into operation, i.e., the time for leaving the room is limited.

The proposed device is free from this disadvantage. This improves the operating conditions of the device and increases the reliability of its operation.

To this end, in the device, the capacitor time of the master / C-chain is connected via the first normally open contacts of the first relay to the winding of the second relay, and through series-connected normally closed contacts of the first relay, remote switch and start switch and the device power switch to the bus

power source. The connection point of the normally closed contacts of the first relay with the normally closed contacts of the remote switch is through the normally open contacts of the start switch. Connected to the blocking winding of the remote switch; The connection point of the normally closed contacts of the remote switch and the start switch is connected to the anode of the diode, the cathode of which is connected through parallel connected second normally open contacts of the first relay and the auxiliary contacts to the device power bus, and through normally open contacts of the remote switch to the winding of the first relay and anode the second diode, the cathode of which is connected to the resistor, which specifies the C-chain;

The drawing shows a schematic diagram of the proposed device.

The device consists of a remote switch 1, a start switch 2, a master circuit time containing a capacitor 3 and a resistor 4, electromagnetic relays 5 and 6, a power switch 7 and limiting diodes 8; The device can connect block contacts 9 of all elements of the object (doors, windows,, etc.), the opening of which should trigger an alarm.

The device works as follows.

When the switch 7 is turned on, the charge circuit of the capacitor 3 is prepared, which remains open and closed due to the contact of the INPUT door switch 2 when the door is closed when the door is closed. When the entrance door is opened (when leaving the object), the upper contacts of the switch 2 are closed and the capacitor 3 is charged before the voltage of the power source. In such a state, the device may last as long as desired.

when the entrance doors are closed, the bottom contact of the 2 door switch is closed and the capacitor 3 is discharged through the blocking winding of the remote switch /. The switch is activated and latched; its normally closed contacts 10 open, disconnecting the capacitor

5 from the charging circuit, and the normally open contacts 11 are closed, preparing the switching circuit of the intermediate relay 5.

In such a state, the disconnected from the power source device is ready to give an alarm when the entrance door (or any other element of the object, with block contacts 9 installed on it) is opened.

When the entrance door is opened, the upper contacts of the switch 2 are closed and through the closed contacts 11 of the remote switch 1 the power is supplied to the winding of the relay 5 and for the time of the reference chain (resistor 4 and capacitor 3).

Relay 5 is triggered and blocked through its self-pickup pins 12, maintaining the voltage for the time of the driver circuit. At the same time, with their closed contacts 13, relay 5 connects to the capacitor 3 the winding of relay 6.

The parameters of the time of the master circuit and the input parameters of the relay 6 are selected so that the voltage on the relay winding

6 achieved response values in 7-15 sec. This is exactly the time interval that can be used when opening.

object to turn off the device using the button 14, unlocking when it is pressed, the remote switch 1.

If this does not happen, the relay 6 is triggered and with its contacts it switches on the signal directly or through an intermediate relay (not shown in the diagram).

Closing the entrance door will not stop the signal due to self-blocking relay 5.

Subject invention

An alarm device containing a remote switch, two electromagnetic relays, parallel-connected block contacts, Time reference / C-circuit, start switch, diodes and a power switch, characterized in that, in order to improve reliability, the capacitor is the master / C-chain is connected through the first normally open contacts of the first relay to the winding of the second relay, and through the serially connected normally closed contacts of the first relay, the remote switch and the start switch The power switch and the device power switch are connected to the power supply bus, the connection point of the normally closed contacts of the first relay and the normally closed contacts of the remote switch is connected to the blocking winding of the remote switch via the normally open contacts of the remote switch and the anode diode, the cathode of which is connected through parallel connected second normally open contacts - the first relay and block contacts to the power bus, and through normally open contacts of the remote switch to the winding of the first relay and the anode of the second diode, the cathode of which is connected to the resistor, the time of the master circuit.