초록 ▼

A barrier alarm for positioning adjacent a door opening includes an elongated tubular body having a vibration-sensing relay fitted thereto. The relay is able to distinguish between a smooth, continuous movement such as associated with the swinging arc motion effected by a breeze and the instantaneou

A barrier alarm for positioning adjacent a door opening includes an elongated tubular body having a vibration-sensing relay fitted thereto. The relay is able to distinguish between a smooth, continuous movement such as associated with the swinging arc motion effected by a breeze and the instantaneous vibration effected by being impacted by a rigid object. The power source may be integrated with the body or may be remote. The power source may be a direct current source or may be an alternating current source. The alarm may be audible or visible or both. The alarm may be integrated with the body or may be remotely positioned. The barrier alarm may be provided in an array that is horizontally-positioned with respect to the top portion of the door jamb or may be vertically positioned with respect to the door. A combination of this arrangement may be used.

대표청구항 ▼

[ I claim:] [1.] A barrier alarm positionable on a surface by a door opening, the barrier alarm comprising:an elongated body attached to the surface by the door opening, said body having a first end and a second end;a first arm connecting said first end of said body to the surface by the door openin

[ I claim:] [1.] A barrier alarm positionable on a surface by a door opening, the barrier alarm comprising:an elongated body attached to the surface by the door opening, said body having a first end and a second end;a first arm connecting said first end of said body to the surface by the door opening, said first arm maintaining said first end of said body in a spaced apart relation with respect to the surface by the door opening;a second arm connecting said second end of said body to the surface by the door opening, said second arm maintaining said second end of said body in a spaced apart relation with respect to the surface by the door opening;a movement-responsive alarm relay operatively associated with said body;an alarm;a power source; andcircuitry for connecting said relay, said alarm, and said power source,whereby substantially sudden impact of a moving article against said body effects an alarm response through the connection of said circuitry.