Patent ID: 8684426

Claim:
A method of installing an alarm sensor in a door attached to a door frame, comprising the steps of: (a) providing a positioning member, the positioning member having a longitudinal centerline and a marking point, the marking point being aligned with the longitudinal centerline of the positioning member; (b) partially opening the door; (c) placing the positioning member in a hole in the frame; (d) while the positioning member is in hole, closing the door in the door frame; (e) while the door is closed in the door frame, applying force on the positioning member to cause the marking point of the positioning member to make a positioning mark on the door; (f) after step â€œeâ€, opening the door and removing the positioning member from the hole in the frame; and (g) after step â€œeâ€, drilling an opening in the door at the location of the positioning mark.