A WATER ACTIVATED CHILD SAFETY ALARM

摘要

A water activated child safety alarm comprises a base unit and a beacon unit, upon immersion in water the beacon unit detaches itself from the base unit, floats to the water's surface and emits an audible alarm signal. The two sections may separate as a resultof the release or generation of a volume of gas in a cavity formed between the two sections. The gas is preferably generated by the decomposition of a highly energetic polymer, such as nitrocellulose, set in a polymeric binder, such as a crosslinked polyurethane elastomer, the binder acting as a sacrificial adhesive, bonding the two sections together.