Door alarm

Claim 1

An improved security device adapted to be mounted on the top edge of an inwardly swinging door, said device including: (a) a housing having a hollow interior; (b) bracket means for mounting the housing on the door; (c) alarm means mounted within the hollow interior of the housing, said alarm means including an actuation lever projecting outwardly beyond the housing, a battery, an audible buzzer operable by the battery, a set switch operable by a manually activated plunger for opening and closing an electric circuit between the buzzer and said battery through the actuation lever, and a plurality of conductors electrically connecting said buzzer to the battery, set switch and actuation lever, said lever including a spring steel strip, one end of which is attached within the housing to a strip of conductive material, said one end being separated from said conductive strip by dielectric material, said spring steel strip being movable between alarm ON and OFF positions and biased toward the alarm ON position, said spring steel strip further being biased toward engagement with an inside frame of a door when the security device is mounted on the door, wherein an opposite end of the spring steel strip which projects outwardly from the housing engages the inside frame of the door for moving said spring steel strip to the alarm OFF position when the door is closed, said spring steel strip moving to the alarm ON position upon inward movement of the door, so that an electrical circuit is completed between the battery and buzzer when said opposite end of the spring steel strip is urged by its bias upon inward movement of the door to the alarm ON position causing said one end of the spring steel strip to contact the strip of conductive material to complete said circuit to actuate the buzzer.