Reed switch apparatus and method of using same

• US 8,111,119 B2
• Filed: 08/21/2007
• Issued: 02/07/2012
• Est. Priority Date: 02/19/2003
• Status: Active Grant

• Current Assignee: Trackit Incorporated
• Original Assignee: Glendell N. Gilmore
• Inventors: Gilmore, Glendell N.
• Primary Examiner(s): Enad, Elvin G
• Assistant Examiner(s): Talpalatskiy, Alexander
• Application Number:
  US11/842,920
• Publication Number:
  US 20070279165A1
• Time in Patent Office: 1,631 Days
• Field of Search: 335205-207
• US Class Current: 335/205
• CPC Class Codes: B65D 25/02 Internal fittings of containers made by folding or erecting blanks made of paper B65D5/44
• CPC Class Codes: B65D 88/00 Large containers component parts, details or accessories B65D90/00; construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site E04H7/00; gas holders of variable capacity F17B; vessels for containing or storing compressed, liquefied or solidified gases F17C
• CPC Class Codes: B65D 88/12 specially adapted for transport associated with vehicles, see the relevant subclasses of B60 - B64
• CPC Class Codes: B65D 90/008 Doors for containers, e.g. ISO-containers locking E05B83/12
• CPC Class Codes: G08B 13/08 by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind
• CPC Class Codes: H01H 1/66 Contacts sealed in an evacuated or gas-filled envelope, e.g. magnetic dry-reed contacts
• CPC Class Codes: H01H 36/0006 Permanent magnet actuating reed switches H01H35/147 takes precedence
• CPC Class Codes: H01H 36/0046 Limit switches, also fail-safe operation or anti-tamper considerations
• CPC Class Codes: H01H 50/16 Magnetic circuit arrangements
• CPC Class Codes: Y10T 29/49764 with testing or indicating
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

A reed switch apparatus utilizes one or more reed switches to communicate with one or more devices. In one configuration, the reed switch apparatus utilizes a single magnetic field to, simultaneously activate two or more reed switches. In another configuration, two or more reed switches, each acting independent of one another are simultaneously activated by a single magnetic field. Additionally, a method of controlling at least two devices includes exposing a reed switch apparatus to a single magnetic field. Yet another method includes activating a device via the use of a single reed switch mounted to a portion of a warehouse structure.

Claims

1. In a structure having a high voltage device and a frame defining an opening, the opening having an open position and a closed position, a method of controlling the on/off condition of the high voltage device comprising the steps of:

coupling a reed switch apparatus having a reed switch to the structure;

providing a control module sense circuit having sense terminals receiving a low voltage control signal from the reed switch apparatus for controlling the high voltage device, the reed switch having a first state and a second state;

mounting a permanent magnet member having a magnetic field to the structure in proximity to the reed switch, the permanent magnet member and the reed switch in fixed relation to each other and defining a latch opening therebetween;

providing a sliding latch member constructed of a ferromagnetic material capable of being removably inserted in the latch opening, the sliding latch member having an open position and a closed position,

wherein in the open position of the sliding latch member the magnetic field is exposed to the reed switch to cause the reed switch to be in the first state, and when the sliding latch member is in the closed position, the magnetic field is not exposed to the reed switch to cause the reed switch to be in the second state; and

controlling the on/off condition of the high voltage device by the control module sense circuit sense terminals receiving a low voltage control signal when the reed switch is in one state and by the low voltage control signal not being received by the control module sense circuit sense terminals when the reed switch is in its other state.

2. The method of claim 1, further comprising the steps of:

biasing the reed switch to the second state by the constant presence of a biasing magnetic field generated by a biasing metal alloy magnet member exposed to the reed switch;

wherein in the open position of the sliding latch member the effect on the reed switch of the magnetic field of the permanent magnet member is greater that the biasing magnetic field to cause the reed switch to be in the first state, and when the sliding latch member is in the closed position, the magnetic field of the permanent magnet member is not exposed to the reed switch and the biasing magnetic field cause the reed switch to be in the second state.

3. The method of claim 1, wherein the high voltage device is a light and said step of controlling the on/off condition of the light results in the light being turned on by retracting the sliding latch member from the latch opening and results in the light being turned off by inserting the sliding latch member into the latch opening.

4. The method of claim 1, wherein the control module sense circuit controls a single high voltage device.

5. The method of claim 1, wherein the communication of the low voltage control signal from the reed switch apparatus to the control module sense circuit is wireless.

6. A structure comprising:

an opening member cooperatively engaging a mounting frame, said opening member having an open position and a closed position;

a high voltage device installed in the structure;

a reed switch coupled to said frame, said reed switch having an open state and a closed state;

a low voltage control signal sense circuit device including said reed switch, said low voltage control signal sense circuit device interconnected with said high voltage device; and

a housing in which said reed switch and a permanent magnet member having a constant magnetic field are mounted and a gap being defined between said magnet member and said reed switch;

a ferromagnetic latch bolt arranged and designed to pass through a latch aperture in said housing and extend in said gap between said magnet member and said reed switch, wherein said magnetic field is not exposed to said reed switch to cause said reed switch to be in one state when said ferromagnetic latch bolt is present between said magnet member and said reed switch, and said magnetic field is exposed to said reed switch when said ferromagnetic latch bolt is not present between said magnet member and said reed switch to cause said reed switch to be in its other state,

wherein said low voltage control signal sense circuit device has sense terminals facilitating communication between said reed switch and said high voltage device.

7. The structure of claim 6, wherein said state of said reed switch controls said high voltage device between an on position and an off position.

8. The structure of claim 6, wherein said low voltage control signal sense circuit device includes an activation time or deactivation time and isolation characteristics to control the high voltage device upon said low voltage control signal sense circuit device receiving or not receiving a low voltage control signal from said reed switch.

9. The structure of claim 8, wherein said low voltage control signal for activation or deactivation, received by said low voltage control sense circuit device from said reed switch, is a low potential control signal relative to the ground potential of said low voltage control signal sense circuit device and is in intermediate relation to a high potential control signal relative to the operating voltage of said low voltage control sense circuit device.

10. The structure of claim 6, wherein communication of said reed switch with said low voltage control signal sense circuit device is wireless.

11. A reed switch assembly attached to an access opening in a structure, the reed switch assembly comprising:

a single reed switch having a plurality of reed contacts communicating with a plurality of control module sense circuit devices having sense terminals and systems;

a permanent magnet having a single constant magnetic field arranged and designed to activate said plurality of reed contacts;

an enclosure to house said single reed switch and said permanent magnet, wherein said single reed switch and said permanent magnet are mounted within said enclosure to define an open gap between said permanent magnet and said reed switch;

an attachment device for mounting said enclosure to the access opening; and

a ferromagnetic latch bolt arranged and designed to pass through said open gap between said permanent magnet and said reed switch,

wherein when said ferromagnetic latch bolt is present between said permanent magnet and said reed switch, said single constant magnetic field is not exposed to said reed switch and said reed switch is in a first state, and when said ferromagnetic latch bolt is not present between said permanent magnet and said reed switch, said single constant magnetic field is exposed to said reed switch and said reed switch is in a second state;

wherein at least one said reed contact is connected to a sense terminal of said control module sense circuit device to pass or not pass a low voltage control signal to control the off and on condition of a high voltage device.

12. The reed switch assembly of claim 11, wherein at least two of said plurality of control module sense circuit devices having sense terminals and systems share the same common control signal reference point.

13. The reed switch assembly of claim 11, wherein said first and second states of said reed switch comprise a magnetic field present state and an opposite state, said reed switch is biased to said magnetic field present state by the constant presence of a first biasing magnetic field generated by a first metal alloy magnet member exposed to said reed switch,

said reed switch is activated to said opposite state by introducing said single constant magnetic field in close proximity of said reed switch and said first metal alloy magnet member.

14. The reed switch assembly of claim 13, wherein said single constant magnetic field is generated by a second magnet member.

15. The reed switch assembly of claim 11, wherein at least one said control module sense circuit device controls a high voltage device, said control module sense circuit device receives a control signal from at least one said reed contact for activation or deactivation, said control signal is low potential control signal relative to the ground potential of said control module sense circuit device and is in intermediate relation to a high potential control signal relative to the operating voltage of said control module sense circuit device.

16. The reed switch assembly of claim 11, wherein at least one said reed contact is in communication with at least one control module sense circuit device having sense terminals comprising of a mechanical or solid state switching device and a power source in conjunction with an optional step down transformed/rectifier circuit and an optional off or on timing circuit.

17. The reed switch assembly of claim 11, wherein at least one said reed contact is connected to an alarm system to pass or not pass a low voltage control signal to said alarm system to communicate the open or closed status of the access opening.

18. The reed switch assembly of claim 11, wherein the communication of at least one said reed contact and at least one system and control module sense circuit device is wireless.

19. A reed switch assembly attached to an access opening in a structure, the reed switch assembly comprising:

a single reed switch having a plurality of reed contacts communicating with a plurality of control module sense circuit devices having sense terminals and systems;

a permanent magnet having a single constant magnetic field arranged and designed to activate said plurality of reed contacts;

an enclosure to house said single reed switch and said permanent magnet, wherein said single reed switch and said permanent magnet are mounted within said enclosure to define an open gap between said permanent magnet and said reed switch;

an attachment device for mounting said enclosure to the access opening; and

a ferromagnetic latch bolt arranged and designed to pass through said open gap between said permanent magnet and said reed switch, wherein when said ferromagnetic latch bolt is present between said permanent magnet and said reed switch, said single constant magnetic field is not exposed to said reed switch and said reed switch is in a first state, and when said ferromagnetic latch bolt is not present between said permanent magnet and said reed switch, said single constant magnetic field is exposed to said reed switch and said reed switch is in a second state;

wherein at least one of said control module sense circuit devices includes an activation time or a deactivation time and isolation characteristics to control a high voltage device upon said control module sense circuit device receiving or not receiving a low voltage control signal from at least one said reed contact.