SMOKE FIRE ALARM Russian patent published in 2005 - IPC

FIELD: fire alarm systems.

SUBSTANCE: device has main smoke detector, additional smoke detector, both detectors are positioned on one vertical axis, directed by bases towards each other and are rigidly connected to each other. Due to use of additional smoke detector, its position and connections to other elements of device trustworthy control of smoke presence is provided (in particular, when using optic-electronic sensors - control of optical density frequency air) in two points of controlled space, positioned on same vertical axis, while by character of connection to fire alarm cable device remains detachable, this property substantially simplifies maintenance of device.

EFFECT: simplified operation conditions and simplified maintenance.

2 cl, 3 dwg