Abstract: An intrusion alarming apparatus according to this invention detects the human body present in a sensing zone thereof and sends out warning information by means of sound and light. Detection of the human body depends on a human body sensor which emits detection signals in response to variation in the strength of heat rays or interception of radiated infrared rays. Information by the use of sound and light is effected by driving a sound-using alarm such as a speaker and a light-using alarm such as a stroboscope with a sound emission driving circuit and a light emission driving circuit which operate on the basis of detection signals output by the human body sensor. The driving circuits for sound and light emission are connected to each other so as to be operated by means of a single timer circuit.

Abstract: A packaging unit for use in the marketing of compact alarm systems including a flat supporting sheet, a flat panel smaller than the supporting sheet and pivotally coupled to the supporting sheet along one edge, at least one alarm actuating device provided on said panel adjacent an edge opposite to that coupled to the supporting sheet, at least one actuation response device provided on the flat sheet adjacent the alarm actuating device, at least one alarm device provided on the supporting sheet and coupled to the actuation response device such that the alarm device is actuated by the actuation response device and a means for fixing the alarm device and the actuation response device to the supporting sheet and for fixing the actuating device to the front flat panel.