Fire Alarm
A fire alarm system warns people when smoke, fire, carbon monoxide or other fire-related emergencies are detected. These alarms may be activated automatically from smoke detectors and heat detectors or may also be activated via manual fire alarm activation devices such as manual call points or pull stations. Alarms can be either motorized bells or wall mountable sounders or horns. They can also be speaker strobes which sound an alarm, followed by a voice evacuation message which warns people inside the building not to use the elevators. Fire alarm sounders can be set to certain frequencies and different tones including low, medium, and high, depending on the country and manufacturer of the device. Most fire alarm systems in Europe sound like a siren with alternating frequencies. Fire alarm electronic devices are known as horns in the United States and Canada and can be either continuous or set to different codes. Fire alarm warning devices can also be set to different volume levels.
Grantham (/ˈɡrænθəm/ GRAN-thəm) is a market and industrial town in the South Kesteven district of Lincolnshire, England. It straddles the London–Edinburgh East Coast Main Line and the River Witham and is bounded to the west by the A1 north–south trunk road. It lies about 23 miles (37 kilometres) south of the county town, Lincoln, and 22 miles (35 kilometres) east of Nottingham. The population in 2016 was put at 44,580.[1] Grantham is known as the birthplace of former UK Prime Minister Margaret Thatcher, for educating Isaac Newton at the King's School, as the workplace of the UK's first female police officer, Edith Smith in 1914, and for making the UK's first running diesel engine in 1892 and tractor in 1896. Thomas Paine worked there as an excise officer in the 1790s.
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