Magnetic security device for securing doors

摘要

A lock position detection device includes a door locking mechanism, a magnetic field sensor such as a reed switch and a wireless transmitter. A magnet enters proximity of the sensor when the actuator is operated to one position and causes the sensor to output a first signal via the RF transmitter, and exits proximity of the sensor when the actuator is operated to another position and causes the sensor to output a second signal. A magnetic field shield is located with respect to the sensor to prevent a magnetic field from outside the door from being detected by the sensor. The magnet is coupled to the door locking mechanism such that the magnet enters and exits proximity of the sensor at an angle generally perpendicular to the sensor when the actuator is operated between positions, substantially along a line that is offset from a centerline of the reed switch.