Door position sensor for an electromagnetic door lock

Patent metadata

Field	Value
Publication number	US-2021017789-A1
Application number	US-202017065161-A
Country	US
Kind code	A1
Filing date	Oct 7, 2020
Priority date	Apr 14, 2016
Publication date	Jan 21, 2021
Grant date	—

Abstract

A door position sensor of an electromagnetic door lock. The electromagnetic lock also includes an electromagnet and a strike plate. The electromagnet is secured to the door frame and the strike plate is movably mounted to the door so that a controlled amount of door movement in the opening direction is permitted while the strike plate remains in contact with an energized electromagnet. The door position sensor may comprise a sensor in or on the electromagnet and a permanent magnet mounted to the door and disposed in proximity to the sensor when the door is in a closed position. The sensor may be a reed switch or a Hall Effect sensor. The permanent magnet and strike plate may be mounted to the door by a mounting tray. The mounting tray may include indicia to aid in providing a proper alignment of the strike plate to the door and electromagnet.

First claim

1 . An electromagnetic door lock for selectively locking and unlocking a door to a door frame, said door being pivotally coupled to said door frame, the electromagnetic door lock comprising:
a) an electromagnet mountable to said door frame; b) a strike plate assembly configured to be mounted to said door comprising:
i) a strike plate; and
ii) a strike tray configured to receive said strike plate and disposed between said strike plate and said door.

2 . The electromagnetic door lock of claim 1 wherein said strike tray includes a cavity, wherein said cavity is proportioned to receive said strike plate.

3 . The electromagnetic door lock of claim 1 wherein said strike tray includes indicia.

4 . The electromagnetic door lock of claim 3 wherein said indicia is instructive of proper positioning of said electromagnetic door lock.

5 . The electromagnetic door lock of claim 1 further comprising:
a) a sensor connected to said door frame; and
b) a permanent magnet connected to said strike tray and aligned with said sensor when said door is closed, wherein movement of said door away from said door frame is detected by said sensor.

6 . The electromagnetic door lock of claim 1 wherein said strike plate is movably mounted to said strike tray.

7 . A strike plate assembly of an electromagnetic door lock configured to be mounted to a door, said strike plate assembly comprising:
a) a strike plate; and b) a strike tray configured to receive said strike plate and disposed between said strike plate and said door.

8 . The strike plate assembly of claim 7 wherein said strike tray includes a cavity, wherein said cavity is proportioned to receive said strike plate.

9 . The strike plate assembly of claim 7 wherein said strike tray includes indicia.

10 . The strike plate assembly of claim 9 wherein said indicia is instructive of proper positioning of said electromagnetic door lock.

11 . The strike plate assembly of claim 7 configured to operate in conjunction with a position sensor mounted to a door frame, said strike plate assembly further comprising a magnet connected to said strike tray configured to align with said sensor when said door is closed wherein movement of said door away from said door frame is detected by said sensor.

12 . The strike plate assembly of claim 7 wherein said strike plate is movably mounted to said strike tray.

Assignees

• Hanchett Entry Systems Inc

Inventors

• Corwin Jr Larry Gene
• Jay Darik

Classifications

• Y10T292/696

  With movable dog, catch or striker · CPC title

• Y10T292/11

  Magnetic · CPC title

• Y10T292/0908

  Emergency operating means · CPC title

• E05C19/168

  a movable bolt being electromagnetically held in the striker by electromagnetic attraction · CPC title

• E05C17/56

  by magnetic or electromagnetic attraction {or operated by electric or electromagnetic means (for closed wings E05C19/16)}; (operation of locks or fasteners by electric or magnetic means E05B47/00) · CPC title