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Many modern fire alarm pull stations are single-action and only require the user to pull down a handle to sound the alarm. Other fire alarm pull stations are dual-action, and as such require the user to perform a second task before pulling down, such as lifting or pushing in a panel on the station or breaking a glass panel with an attached hammer.
As battery-backup systems became smaller and more efficient, some exit signs began to use a dual-power system. Under normal conditions, the exit sign was lit by mains power and the battery was maintained in a charged state. In the event of a power outage, the battery would supply power to light the sign.
Coded panels were the earliest type of central fire alarm control, and were made during the 1800s to the 1970s. A coded panel is similar in many ways to a modern conventional panel (described below), except each zone was connected to its own code wheel, which, depending on the way the panel was set up, would either do sets of four rounds of code until the initiating pull station was reset ...
Georgia football coach Kirby Smart provided an update on quarterback Carson Beck's injury on ESPN's CFP selection show. Here's the latest:
An Australian man is accused of murdering his wife with a homemade spear. Talaat Hawatt, also known as Terrance Howot, is accused of having attacked his wife Khouloud Bakour Hawatt with the weapon ...
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Smoke detector mounted on a ceiling Knowing this sound could save your life - it means replace the battery. A smoke detector is a device that senses smoke , typically as an indicator of fire . Smoke detectors/Alarms are usually housed in plastic enclosures, typically shaped like a disk about 125 millimetres (5 in) in diameter and 25 millimetres ...
A lawyer for sex trafficking victims in a ring allegedly run by ex-Abercrombie & Fitch CEO Mike Jeffries has doubts about claims he has dementia.