Patent ID: 6696949
Filing Date: 2004-02-24
Classification: H04M,H04N

Abstract:
A security device, comprising:a power supply; a pair of first conductors connecting said power supply with a remote source of alternating current; a first switch associated with said first conductors for selectively breaking the connection between said power supply and said remote source of alternating current upon opening said first switch; an outlet connected by a pair of second conductors to said pair of first conductors such that said first switch selectively breaks the connection between said outlet and said remote source of current; a power cutoff relay connected to said power supply so as to be energized by direct current therefrom upon closing said first switch; a first normally open contact set associated with said second conductors and adapted to be closed by said power cutoff relay when energized to connect said source of alternating current with said outlet; an alarm connected to said power supply and adapted to emit an audible signal upon being energized by direct current from said power supply; a current sensor for sensing the flow of alternating current from said outlet; a second switch operatively coupled to said current sensor for permitting the flow of direct current to said alarm when alternating current flow is sensed by said sensor; a pair of jacks isolated from common ground and connected together by a pair of third conductors through which a communications signal can be passed; a pair of signal transfer relays connected to said power supply in series circuit relationship with said power cutoff relay to said power supply; and, a pair of second normally open contact sets associated with said third conductors and each being adapted to be closed by a respective one of said signal transfer relays when energized to connect said jacks together.