Definition of fire alarm

The origin of the term "fire alarm" can be traced back to the mid-19th century, during the industrial revolution. Factories and buildings were being constructed rapidly, and the increased use of machinery and technology led to a higher risk of fire outbreaks. Initially, people would shout or ring bells to signal a fire, but these methods were often unreliable and ineffective, as they relied on individual actions. Therefore, the need for a more efficient and automated fire warning system became apparent. In the 1850s, a man named Robert Nelson patented the first automatic fire detection system, which consisted of a water-filled glass bulb filled with combustible material. If a fire broke out, the rising heat would shatter the bulb, causing a bell to ring and alerting the surrounding community. This invention became known as the "Nelson Fire Alarm". Another significant innovation was the introduction of the electric fire alarm in the late 1800s. The first electric fire alarm system was installed in the Assembly Rooms of the Boston Library in 1881. This system consisted of smoke detectors and throw switches that triggered an alarm when activated. Today, the term "fire alarm" refers to a systematic arrangement of devices designed to detect and warn people of the presence of smoke, fire, or other potentially hazardous situations. These systems often include audible and visual signal devices, as well as equipment to monitor and control the fire detection and alarm functions.