Abstract: A passive, non-armored shield for protecting e.g., an exterior telephone service line and/or telephone service box. The shield comprises a layered structure which includes a TP non-conductive, preferably styrene panel which is sized and dimensioned to encase a space which includes the telephone service line and telephone service box. A pair of conductive laminates, each having a conductive foil layer (e.g., aluminum) and a non-conductive layer, e.g., polyester film and a heat seal coating are disposed on the panel. Each of the conductive layers is electrically connected to an electrical contact pad which in turn is connected via a terminal block to a building alarm and/or security system. Tamper switches are also provided to detect any unauthorized attempt to remove the shield.

Abstract: A security device, intended for use as a temporary or permanent vehicle security device, having an intrusion detection device in the form of a pair of electrical contacts supported on a shock amplifying, rigid base and responsive to percussive-type forces for generating a detection signal. At least one of the electrical contacts is supported on a relatively stiff cantilevered arm which will not respond to small movements and vibrations, to thereby avoid generating frequent false alarms. Any contact closure signal from the electrical contacts is processed by a detection circuit which counts multiple contact closures and/or measures total closure time, thus ignoring signals generated from small forces or vibrations, thereby preventing against the source of most false alarms when generating a detection signal.