To make people aware of a fire occurring or starting.
Smoke detectors were invented in the year 1967. :P
The smoke alarm went off at night because it detected smoke or fire in the vicinity, which triggered the alarm to alert people of potential danger.
Smoke detectors were invented to provide early warning in case of a fire. They help to detect smoke and trigger an alarm to alert people in the vicinity to evacuate the building and seek safety. Smoke detectors have since become a crucial tool in fire safety, helping to save countless lives.
If the smoke alarm lasts for ten years before you need to replace it, and the batteries should be replaced at least once per year, you would need to change the batteries of a smoke alarm ten times before you replace the entire thing.
They used smoke signals to communicate with one another.
I would not install a smoke alarm, in the kitchen.
fire
The smoke alarm low battery sound indicates that the battery in the smoke alarm needs to be replaced to ensure the alarm continues to function properly.
Prevented most people from dying in their sleep.
To silence the smoke alarm, press the button on the alarm until it stops beeping.
The smoke alarm may not have gone off when the popcorn burnt due to several reasons. It could be that the smoke was not dense enough to trigger the alarm, or the alarm's sensitivity settings were too low. Additionally, if the smoke alarm was malfunctioning or had a dead battery, it would fail to detect the smoke. Finally, the type of smoke alarm—ionization vs. photoelectric—can affect its responsiveness to different types of smoke.