What is a fire alarm?
People must alert their local fire brigades whenever there is an emergency, even if the energy and telephone lines are non -functional. The fire alarm is one of the ways to achieve this because it has its own energy source, which is independent of the main electric societies. This device contains a lever that is pulled in the event of a fire and creates a telegraph report for fire brigades. Each unit contains a unique number that is monitored by the fire brigade to determine the location of the fire. Normally it is a bright red box connected to the telephone pole in residential areas, most often in the Eastern United States. During this time, the use of telegraph machines has become common throughout the US and this technology has been widely accepted as a method of contacting emergency workers. This trend continued to increase in the first half of the 20th century, but during the last half, the phones were more used to report fires. As a result, many mIt has left the use of fire alarm boxes, although they are still popular in New Jersey.
Fire alarm cabinet is a rectangular device around eight to ten inches (20.32 to 25.4 cm) long and six inches (15.24 cm) wide, which somewhat resembles a bird house. It is usually painted bright red and has a capital white letters that spell the word "fire" on both sides. The box is usually hung on the side of the light pole and is located three to four feet (0.92 to 1.22 m) from the ground to be easily accessible. In the center of the box is a lever that is withdrawn whenever fire is when it sends a telegraph to the nearest fire station.
Every fire alarm field has its own unique code so that firefighters can determine where the call comes from. The disadvantage of this is the troop of the fire brigade can only determine the general area where fire breaks out rather than a specific residence. The advantage is that the tensile box works nAnd the energy from the battery or generator, so it can be an effective means of communication, although otherwise interrupted electric or telephone services. This unit is expensive to maintain, but can help save lives during a terrorist attack or a widespread natural disaster.