Abstract: An attachment device for enabling an article to releasably be secured on a person has a stud, a plate member and co-operating portions on the stud and the plate member. The stud includes a part circular flange with a flat portion along its periphery. The plate member includes a lead-in channel extending from an edge of the plate member towards an opposite edge of the plate member, a part-circular reception portion extending from the channel, and a tongued portion extending from the reception portion in the direction of the reception portion but spaced apart from the reception portion. The stud and the plate member are engageable and dis-engageable by a sliding action. The co-operating portions allow the stud and plate member to rotate and to be held together until they are subjected to a dis-engaging sliding action exceeding a predetermine value.

Abstract: A remotely activatable alarm system comprising a portable security container, a handle for carrying the security container, a manually operable lock for locking and unlocking the security container, smoke and sound outlets provided in a bottom wall of the security container, a smoke emitting device which is positioned in the security container, an audio alarm which is positioned in the security container, a receiver which is positioned in the security container and which is for activating the smoke emitting device and the audio alarm consequent upon receiving a transmitted signal, and a transmitter for transmitting the transmitted signal to the receiver from a position remote from the security container.