Abstract: Alarm-triggering locking plate for the closing area of a door or window to be secured, comprising a first breaking plate (4) to be overcome by force, having at least one stop element (3), comprising a second fixing means for the locking plate (1) which is more difficult to overcome by force, and is designed as at least one counter stop element (12) anchored on a door or window frame, and means which trigger an alarm when the first fixing means has been overcome, wherein a motion of the front retaining part (3) in the opening direction (8) of the door or window is limited by the second fixing means (12) when the first fixing means (4) has been overcome.

Abstract: An electrical conductor element in the form of a flexible or rigid sheet is provided for detecting attempts to break into a space where valuables or money are being stored, such as a strongroom or the coin container of a slot machine. The base material of the element is in the form of a woven or non-woven material or of plastic sheeting, and the electrical conductor is in the form of wire such as enameled copper wire for electrical connection with an alarm system. The conductor is secured in place by stitching, that is to say the wire is either formed into penetrating stitches by being fed from the needle or shuttle of a sewing machine or it is fed from a stationary part of the sewing machine so as to be fixed in place by stitches or conventional textile yarn or thread. When the conductor is interrupted by drilling, sawing or the like the alarm system is activated.