SECURITY ALARM DEVICE Russian patent published in 2025 - IPC G08B13/24 

FIELD: alarm systems.

SUBSTANCE: invention relates to alarm signalling devices in case of intrusion into a secure facility. Security alarm device comprises: alarm sensor, an electronic switch in the form of a transistor, which is connected to a relay, which contacts are connected to the signalling device, a time-setting univibrator, two signal delay univibrators, two AND elements, a trigger, an exit signal delay button, an exit signal reset button. One signal delay univibrator is connected to a delay button for exiting a secure facility and a first AND element connected to an alarm sensor. Second signal delay univibrator is connected to the first AND element, the trigger and the second AND element. Trigger is also connected to the reset button after entering the room and the second AND element connected to the time-setting univibrator connected to the electronic switch connected through the relay contacts to the sound and (or) light signalling device.

EFFECT: simplifying the design and increasing ease of use.

1 cl, 5 dwg