Fecha de publicación: 25/01/1980 Fuente: WIPO "royal booby" A pressure relaxation booby-trap, i.e. a device which induces the explosion of an explosive charge at the moment when an object placed on the booby-trap is lifted, incorporates a safety system and an actuating system which can each be brought into a storage position and a service position independently of the other. The normal operation of the trap is brought about when the systems have been brought into their service position in a predetermined order. The safety of personnel handling the boob-trap is ensured both during its storage and during its having, even in case of clumsiness or defective placing.