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A Faraday cage or Faraday shield is an enclosure used to block some electromagnetic fields. A Faraday shield may be formed by a continuous covering of conductive material, or in the case of a Faraday cage, by a mesh of such materials. Faraday cages are named after scientist Michael Faraday, who first constructed one in 1836. [1]
A fire alarm box, fire alarm call box, or fire alarm pull box is a device used for notifying a fire department of a fire or a fire alarm activation. Typically installed on street corners or on the outside of commercial buildings in urban areas, they were the main means of summoning firefighters before the general availability of telephones.
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 ...
An “incendiary device” was found attached to the side of a ballot drop box when Portland Police responded about 3:30 a.m. Monday, and security personnel extinguished the fire, the Portland ...
A Knox Box is a small, wall-mounted safe that holds building keys for fire departments, emergency medical services, and sometimes police to retrieve in emergency situations. [ 1 ] [ 2 ] The term "Knox-Box" is a brand name for such products produced by the American company Knox Associates, which does business as The Knox Company.
The CBS News investigation uncovered at least 50 cases of police illegally selling their weapons online, through dealers, out of their homes, or the back of their cars — in many cases at steep ...
The blue, drive-up collection box located on the property of a post office at North 7th Avenue was set on fire around 1:20 a.m. local time on Thursday, Oct. 24, per NBC News and AZFamily, which ...
From the 1930s to the 1960s, Faraday was known as "Sperti-Faraday", and the company moved to Adrian, Michigan. [1] From the late 1960s up until present, many companies rebranded Faraday's popular line of notification appliances, including Simplex , Standard Electric Time Company , Pyrotronics , Gamewell, FCI, and more.
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