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A fire alarm system is a building system designed to detect, alert occupants, ... sirens, chimes, bells, loudspeakers, or a combination of these devices. ...
safety alarms, which go off if a dangerous condition occurs. Common public safety alarms include: civil defense siren, also known as tornado sirens or air raid sirens; fire alarm systems. fire alarm notification appliance "Multiple-alarm fire", a locally specific measure of the severity of a fire and the fire-department reaction required. smoke ...
European Siren for fire detection system. A fire alarm notification appliance is an active fire protection component of a fire alarm system.A notification appliance may use audible, visible, or other stimuli to alert the occupants of a fire or other emergency condition requiring action.
Electromechanical bells have been widely used at railroad crossings, in telephones, fire and burglar alarms, as school bells, doorbells, and alarms in industrial areas, since the late 1800s, but they are now being widely replaced with electronic sounders.
In 1999, Keith Nellesen and Todd Pedersen co-founded APX Alarm Security Solutions in Provo, Utah. [4] [5] At the time, the company sold and installed security systems. [4] APX Alarm Security Solutions rebranded as Vivint in February 2011. [4] [6] Vivint was acquired by The Blackstone Group in November 2012. [7]
The sharpest criticism contained accusations that the party had lied to its supporters about President Joe Biden's mental fitness until a disastrous TV debate with Trump in June raised alarm bells ...
Senator Bill Cassidy stood up to Donald Trump in 2021 after the January 6 riot — he was one of seven Republicans who voted to convict Trump.
Local alarms do not include monitoring, but may include indoor and/or outdoor sounders, such as motorized bells or electronic sirens and lights, such strobe lights which may be useful for signaling an evacuation notice during fire emergencies, or to scare off an amateur burglar quickly. However, with the widespread use of alarm systems ...
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