Door lock access control component mounting

• US 8,881,637 B2
• Filed: 03/15/2013
• Issued: 11/11/2014
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Sargent Mfg Co (Assa Abloy AB)
• Original Assignee: Sargent Mfg Co (Assa Abloy AB)
• Inventors: Leites, Rick, Walsh, John E., Lorello, Michael J., O'Day, Adam, Clark, Douglas A., Bogdanov, Victor, Arcaria, Angelo S.
• Primary Examiner(s): HAYES, BRET C
• Application Number:
  US13/835,138
• Publication Number:
  US 20140260929A1
• Time in Patent Office: 606 Days
• Field of Search: 89/11.4, 522/32, 137/75, 361/103
• US Class Current: 89/1.14
• CPC Class Codes: A62C 2/242 with fusible links
• CPC Class Codes: E05B 17/0075 Insulating, e.g. for limiting heat transfer; Increasing fire-resistance of locks
• CPC Class Codes: E05B 65/104 actuated in response to heat, e.g. with fusible element, bimetal, memory shape or swelling material
• CPC Class Codes: F16B 31/005 Breakbolts loosening due to the action of an explosive charge
• CPC Class Codes: Y10T 137/1819 Safety cut-off
• CPC Class Codes: Y10T 29/49826 Assembling or joining
• CPC Class Codes: Y10T 403/16 with adjunctive protector, broken parts retainer, repair, assembly or disassembly feature
• CPC Class Codes: Y10T 403/1633 Utilizing fluid pressure

Abstract

An apparatus and method for releasably mounting access control components for a door lock to a door. A base element is adapted to be mounted to the door. A first wire connector element is mounted to the base element. A mounting element with combustible material attached is provided. A second wire connector element is mounted to the mounting element, and the second wire connector element is releasably connected to the first wire connector element to mount the mounting element to the base element. A spring is provided, and a retainer holds the spring in a loaded state, but in a fire event the retainer may melt, allowing the spring to apply force to the mounting element. Alternatively, an expanding material may apply the force. The force causes the wire connector elements to disconnect and allow the mounting element to separate from the base element.

Claims

1. An apparatus for releasably mounting access control components for a door lock to a door, the apparatus comprising:

a base element mounted to a door;

at least one first wire connector element mounted to the base element;

a mounting element;

at least one second wire connector element mounted to the mounting element, wherein the at least one second wire connector element is releasably connected to the at least one first wire connector element to mount the mounting element to the base element;

a spring; and

a retainer that holds the spring in a loaded state, wherein the retainer is mounted directly or indirectly to the door, and wherein the spring biases the retainer in a direction away from the door.

2. The apparatus of claim 1, further comprising combustible material attached to the mounting element,

wherein the retainer will lose strength as the result of an increase in ambient temperature causing the retainer to release the spring from the loaded state above a predetermined first temperature that is lower than the ignition temperature of the combustible material, being the temperature at which the combustible material will ignite, and

wherein when released, the spring will extend to apply force to the mounting element to cause the at least one first wire connector element and the at least one second wire connector element to disconnect to allow the mounting element to separate from the base element.

3. The apparatus of claim 2, wherein the loss of strength of the retainer is the result of at least a portion of the retainer melting.

4. The apparatus of claim 2, further comprising access control components mounted to the mounting element.

5. The apparatus of claim 2, wherein the base element comprises a substantially planar member and the mounting element comprises a substantially planar member.

6. The apparatus of claim 2, wherein the base element comprises a printed circuit board and the mounting element comprises a printed circuit board.

7. The apparatus of claim 2, wherein the spring is a compression spring, a torsion spring, an extension spring, or a leaf spring.

8. The apparatus of claim 2, wherein the retainer comprises a plastic, a rubber, a low melting point metal, or any combination thereof that with a melting temperature below approximately 500 degrees F.

9. The apparatus of claim 2, wherein the first wire connector element is one of male and female, and the second wire connector element is the other of male and female.

10. The apparatus of claim 2, wherein the first wire connector element and second wire connector element form a mezzanine style connector.

11. The apparatus of claim 2, further comprising at least one additional spring and at least one additional retainer, each retainer for holding a respective spring in a loaded state, wherein each additional retainer is adapted to be mounted directly or indirectly to the door, and wherein each additional spring is adapted to bias a respective retainer in a direction away from the door.

12. The apparatus of claim 1, wherein the base element comprises a substantially planar member and the mounting element comprises a substantially planar member.

13. The apparatus of claim 1, wherein the base element comprises a printed circuit board and the mounting element comprises a printed circuit board.

14. The apparatus of claim 1, wherein the spring is a compression spring, a torsion spring, an extension spring, or a leaf spring.

15. The apparatus of claim 1, wherein the retainer comprises a plastic, a rubber, a low melting point metal, or any combination thereof that with a melting temperature below approximately 500 degrees F.

16. The apparatus of claim 1, wherein the first wire connector element is one of male and female, and the second wire connector element is the other of male and female.

17. The apparatus of claim 1, wherein the first wire connector element and second wire connector element form a mezzanine style connector.

18. The apparatus of claim 1, further comprising at least one additional spring and at least one additional retainer, each retainer for holding a respective spring in a loaded state, wherein each additional retainer is adapted to be mounted directly or indirectly to the door, and wherein each additional spring is adapted to bias a respective retainer in a direction away from the door.

19. The apparatus of claim 1, further comprising access control components mounted to the mounting element.

20. An apparatus for releasably mounting access control components for a door lock to a door, the apparatus comprising:

a base element mounted to a door;

at least one first wire connector element mounted to the base element;

a mounting element;

combustible material attached to the mounting element;

at least one second wire connector element mounted to the mounting element, wherein the at least one second wire connector element is releasably connected to the at least one first wire connector element to mount the mounting element to the base element; and

an expandable material disposed between the base element and the mounting element, wherein the expandable material is capable of undergoing a volume expansion of at least approximately 5% in response to increased ambient temperatures that are less than the ignition temperature of the combustible materials.

21. The apparatus of claim 20, wherein at a first temperature lower than the temperature at which the combustible material will ignite, the expandable material will expand to cause force to be applied to the mounting element to cause the at least one first wire connector element and the at least one second wire connector element to disconnect to allow the mounting element to separate from the base element.

22. The apparatus of claim 20, wherein the expandable material comprises thermal wax.

23. The apparatus of claim 20, wherein the expandable material comprises an intumescent material.

24. The apparatus of claim 20, further comprising a holder adapted to be mounted directly or indirectly to the door, wherein the holder is configured as a piston having a free end and defines an internal region in which the expandable material is disposed, and wherein the free end of the piston applies force to the mounting element in response to the expansion of the expandable material.

25. The apparatus of claim 20, wherein the first wire connector element and second wire connector element form a mezzanine style connector.

26. An apparatus for releasably mounting access control components for a door lock to a door, the apparatus comprising:

at least one first wire connector element;

first means for mounting the at least one first wire connector element to a door;

at least one second wire connector element releasably connected to the at least one first wire connector element;

second means for mounting combustible material to the at least one second wire connector;

means for urging the second means for mounting away from the first means for mounting when a predetermined temperature is exceeded, causing the at least one first wire connector element and the at least one second wire connector element to disconnect.

27. The apparatus of claim 26, wherein the means for urging comprises:

a spring;

a retainer for holding the spring in a loaded state, wherein the retainer is adapted to be mounted directly or indirectly to the door, and wherein the spring is adapted to bias the retainer in a direction away from the door;

wherein the retainer will lose strength causing the retainer to release the spring from the loaded state above a predetermined first temperature that is lower than the ignition temperature of the combustible material, and

wherein when released, the spring will extend to apply force to the second means for mounting to cause the at least one first wire connector element and the at least one second wire connector element to disconnect to allow the second means for mounting to separate from the first means for mounting.

29. The apparatus of claim 26, wherein the means for urging comprises:

an expandable material disposed between the first means for mounting the at least one first wire connector element to the door and the second means for mounting combustible material to the at least one second wire connector, wherein in response to increased temperature and at a temperature lower than the temperature at which the combustible material will ignite, the expandable material will expand to cause force to be applied to the mounting element to cause the at least one first wire connector element and the at least one second wire connector element to disconnect to allow the mounting element to separate from the base element.

30. The apparatus of claim 29, wherein the means for urging further comprises a holder adapted to be mounted directly or indirectly to the door, wherein the holder is configured as a piston having a free end and defines an internal region in which the expandable material is disposed, and wherein the free end of the piston applies force to the mounting element in response to the expansion of the expandable material.

28. The apparatus of clam 27, wherein the retainer losing strength is caused by at least a portion of the retainer melting.

31. A wire disconnection method for releasably mounting access control components for a door lock to a door, the method comprising:

providing a base element mounted to a door;

mounting at least one first wire connector element to the base element;

providing a mounting element;

mounting at least one second wire connector element to the mounting element;

releasably connecting the at least one second wire connector element to the at least one first wire connector element to mount the mounting element to the base element; and

providing means for urging the mounting element away from the base element when a predetermined first temperature is exceeded, causing the at least one first wire connector element and the at least one second wire connector element to disconnect.

32. The method of claim 31, wherein providing means for urging comprises:

providing at least one spring, wherein the force exerted by the at least one spring when released from a loaded state to a free state is greater than the force required to disconnect the first wire connector element and the second wire connector element; and

maintaining each spring in a loaded state with a retainer, wherein each retainer is adapted to be mounted directly or indirectly to the door.

33. The method of claim 32, further comprising:

attaching combustible material to the mounting element;

in response to increasing above a predetermined first temperature that is lower than the ignition temperature of the combustible material, the at least one retainer losing strength causing the at least one retainer to release the at least one spring from the loaded state; and

the at least one released spring extending to apply force to the mounting element to cause the at least one first wire connector element and the at least one second wire connector element to disconnect to allow the mounting element to separate from the base element.

34. The method of claim 33, wherein the retainer losing strength comprises at least a portion of the retainer melting.

35. The method of claim 31, wherein providing means for urging comprises:

disposing an expandable material between the first means for mounting the at least one first wire connector element to the door and the second means for mounting combustible material to the at least one second wire connector, wherein in response to increased temperature and at the first temperature lower than the ignition temperature of the combustible material will ignite, the expandable material will expand to cause force to be applied to the mounting element to cause the at least one first wire connector element and the at least one second wire connector element to disconnect to allow the mounting element to separate from the base element.

36. The method of claim 35, wherein providing means for urging further comprises providing a holder adapted to be mounted directly or indirectly to the door, the holder defining an internal region in which the expandable material is disposed.