Burglar alarm device

Claim 1

A burglar alarm system for indicating that a building is being subject to an unauthorized entry, comprising: a sign type signaling device adapted to be disposed in a conspicuous location about a building and including a housing structure having light means disposed therein, said housing structure including an outer continuously exposed stationary face plate with a plurality of perforations formed therein about a substantial area thereof, and a stationary message plate disposed within said housing between said light means and said face plate with said message plate including a plurality of perforations formed therein in a pattern that effectively spells out a constant stationary distress message, and wherein the perforations in the outer face camouflage the message plate when said light means is not actuated but wherein the perforations in said outer face plate and said message plate are so arranged to always register such that light may project through aligned openings of both said outer face plate and said message plate when said light means is actuated such that the distress message appears across said outer face plate; entry sensing means operatively associated with entry areas of said building such as doors and windows, said entry sensing means including switching means operatively mounted adjacent windows and doors and adapted to be actuated by the opening of such; circuit means operatively interconnecting said sign type signaling device with said entry sensing means such that the actuation of said switching means by the movement of a door or window results in the circuit being closed; and power supply means operatively connected in said circuit for supplying power to said sign type signaling device so as to actuate the same upon the actuation of said entry sensing means.