Door position monitor

• US 7,692,542 B2
• Filed: 06/28/2007
• Issued: 04/06/2010
• Est. Priority Date: 07/14/2006
• Status: Active Grant

• Current Assignee: Dormakaba USA Incorporated (dormakaba Holding AG)
• Original Assignee: Stanley Security Solutions Incorporated (Stanley Black & Decker, Inc.)
• Inventors: Outzs, Allan Harry
• Primary Examiner(s): Wu; Daniel
• Assistant Examiner(s): SMALL, NAOMI J
• Application Number:
  US11/819,548
• Publication Number:
  US 20080012705A1
• Time in Patent Office: 1,013 Days
• Field of Search: 340/547
• US Class Current: 340/547
• CPC Class Codes: G08B 13/08 by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind

Abstract

A door position monitoring mechanism mounted in the edge of a door that senses whether a door is opened or closed by sensing the absence or presence of a magnetic field of a magnet that is mounted in the door frame. Information regarding the door position is then transmitted to a battery operated wireless access control system mounted on the same door through wires extending from the door position monitoring mechanism.

Claims

1. A door position monitor system, comprising:

a magnet;

a magnetically conductive screw suitably adapted for securing a door latch to a door;

a magnetically conductive set screw;

a magnetically actuated switch;

a nonmagnetic tubular housing unit suitably adapted to being mounted into the edge of a door at door latch mounting screw location for mounting said magnetically actuated switch into a door wherein said nonmagnetic tubular housing unit is further suitably adapted to align said magnetically conductive screw, said magnetically conductive set screw, and said magnetically actuated switch with said magnet to create a path for the magnetic force generated from said magnet to activate said magnetically actuated switch and said nonmagnetic tubular housing unit comprises external threads for mounting said nonmagnetic tubular housing unit into the edge of the door at door latch mounting screw location, internal threads to accept said magnetically conductive set screw and said magnetically conductive screw, and means to receive said magnetically actuated switch in the rear end of said nonmagnetic tubular housing unit;

means for transmitting information, including information comprising the presence or absence of a magnetic field of said magnet mounted in a door frame, from said magnetically actuated switch to a sensor or signaling device; and

means for protecting said magnetically actuated switch.

2. The door position monitor system of claim 1 wherein said magnet is mounted in a door frame and hidden from view behind a non-magnetic strike plate.

3. The door position monitor system of claim 1 wherein said means for protecting said magnetically actuated switch comprises inserting said magnetically conductive set screw into the bottom of the internal threads of said nonmagnetic tubular housing unit to protect said magnetically actuated switch from damage.

4. The door position monitor system of claim 1 wherein said magnetically conductive screw is inserted through an aperture in a door latch strike plate and into the internal threads of said nonmagnetic tubular housing unit.

5. The door position monitor system of claim 1 wherein said magnetically actuated switch has plastic tubing shrunk thereon and is mounted into the rear end of said nonmagnetic tubular housing unit.

6. The door position monitor system of claim 1 wherein said means for transmitting information comprises wires which connect to the end of said magnetically actuated switch and are suitably adapted to be connected to a signaling or sensor device.