Old Fire Alarm

Lately I have been in a museum of a former research facility. In one of  the buildings I discovered an old fire alarm.

The fire alarm is mounted at the wall in form of a bright red disk (see photo below). To activate you have to swing the black handle around the disk. Spinning around it makes a bell-like sound with every turn. I’m not sure which time this system was developed. The research facility was used during WWII. So I guess the system must have been up to date at that time.

On public spaces they may used such kind of things to avoid many false alarms due to jokes. The system locks the hand of the person activating the alarm. After police or fire fighters arrive at the scene the person is freed by them.

2015-01-31 13.07.44

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