A safety coffin or security coffin is a coffin fitted with a mechanism to prevent premature burial or allow the occupant to signal that they have been buried alive. A large number of designs for safety coffins were patented during the 18th and 19th centuries and variations on the idea are still available today.
In 1995 a modern safety coffin was patented by Fabrizio Caselli. His design included an emergency alarm, intercom system, a torch (flashlight), breathing apparatus, and both a heart monitor and stimulator.
Despite the fear of burial while still alive, there are no documented cases of anybody being saved by a safety coffin. It is worth noting that the practice of modern-day embalming as practiced in some countries (notably in North America) has, for the most part, eliminated the fear of “premature burial”, as no one has ever survived that process once completed.