Rude Awakening: Low-Frequency Sounders
Back then, it was common to use bells to signal an alarm. As technology changed, it was found that the bells emitted too much electrical noise back into the system and it caused problems with transistors and integrated circuits. For years,
Options for fire systems in old buildings
A prime concern for facility managers is the maintenance and upgrade of their fire safety systems. Here are things to keep in mind as you make the decision to maintain or upgrade your system. The 1980's saw a significant expansion of
How smoke alarms became installed in nearly 100% of US homes
While smoke alarms are installed in almost 100% of homes, approximately 30% of alarms don't work due to aging, removal of batteries, or failure of the homeowner to replace dead batteries. In 1915, people living in homes or apartments could expect