Controllable electronic switch

• US 7,688,175 B2
• Filed: 08/31/2007
• Issued: 03/30/2010
• Est. Priority Date: 07/10/2001
• Status: Expired due to Fees

• Current Assignee: I/O Controls Corporation
• Original Assignee: I/O Controls Corporation
• Inventors: Ying, Jeffrey
• Primary Examiner(s): Vortman; Anatoly
• Application Number:
  US11/849,064
• Publication Number:
  US 20080186126A1
• Time in Patent Office: 942 Days
• Field of Search: 337/14, 337/16, 337/36, 337/102, 337/85, 337/107, 337/86, 337/105, 337/113, 337/333
• US Class Current: 337/105
• CPC Class Codes: H01H 37/52 actuated due to deflection of bimetallic element
• CPC Class Codes: H01H 61/02 wherein the thermally-sensitive member is heated indirectly, e.g. resistively, inductively
• CPC Class Codes: H01H 9/32 Insulating body insertable between contacts
• CPC Class Codes: H02J 13/00022 using wireless data transmission
• CPC Class Codes: H02J 13/00036 the elements or equipment being or involving switches, relays or circuit breakers circuits for indication of single switches H01H9/167
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence
• CPC Class Codes: H02J 7/345 using capacitors as storage or buffering devices
• CPC Class Codes: Y02B 90/20 Smart grids as enabling technology in buildings sector smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00
• CPC Class Codes: Y04S 40/126 using wireless data transmission

Abstract

A controllable electronic switch for, e.g., controlling power distribution comprises a deformable member such as a bimetal arm that can be deformed to break an electrical path. The deformable member may be anchored at one end and in controllable contact with an electrical conductor at the other end. A heating element, such as a coil, can be used to selectively heat the deformable member. The controllable electronic switch can alternatively comprise a deformable member that is terminated in a wedge-shaped member. When the deformable member bends in response to being heated, the wedge-shaped member forces apart a pair of contacts thus breaking an electrical path. The wedge-shaped member and/or associated structures may be configured as a cam mechanism with multiple latching positions.

Claims

1. A controllable electronic switch, comprising:

a pair of electrical contacts, one of said electrical contacts connected to an incoming power wire and the other connected to an electrical conductor;

a deformable member;

a wedge mechanically engaged with said deformable member, whereby said wedge moves forward or backward in synchrony with bending of said deformable member; and

a heating element proximate to the deformable member;

wherein said heating element is responsive to a switch control signal controlling heating thereof, whereby the heating of said heating element bends said deformable member and thereby causes said wedge to force open said pair of electrical contacts and breaks contact between the incoming power wire and the electrical conductor, and the cooling of said heating element returns said deformable member to its initial state and thereby retracts said wedge allowing said pair of electrical contacts to re-connect the incoming power wire and the electrical conductor.

2. The controllable electronic switch of claim 1, wherein said deformable member comprises a bimetal arm.

3. The controllable electronic switch of claim 1, wherein said wedge comprises a cam having multiple latching states.

4. The controllable electronic switch of claim 3, wherein said wedge comprises a front wedge section, a central socket, and a rear wedge section, and wherein the controllable electronic switch further comprises a locking member adapted to be received by the central socket and thereby place the wedge in a latching position.

5. The controllable electronic switch of claim 3, wherein the heating of said heating element switches the wedge among the multiple latching states.

6. The controllable electronic switch of claim 1, wherein said wedge is attached to a pivoting arm, said pivoting arm being caused to rotate about a pivot point when said deformable member bends.

7. The controllable electronic switch of claim 1, wherein power is conveyed from the incoming power wire to a load via the electrical conductor when said pair of electrical contacts are in contact with one another, and wherein no power is conveyed to the load when said pair of electrical contacts are separated from one another by the wedge.

8. The controllable electronic switch of claim 1, wherein said heating element comprises a resistive coil.

9. The controllable electronic switch of claim 1, wherein said switch control signal is generated via manual activation.

10. The controllable electronic switch of claim 1, wherein said switch control signal is generated via an electronic command signal received from a remote source.

11. The controllable electronic switch of claim 1, wherein said deformable member comprises a bimetal arm having a top side comprised of a first metallic substance and a bottom side comprised of a second metallic substance, and wherein said second metallic substance has different thermal properties than the first metallic substance.

12. A controllable electronic switch, comprising:

a pair of electrical contacts, one of said electrical contacts connected to an incoming power wire and the other connected to an electrical conductor;

a deformable member;

a wedge-shaped member proximate to said pair of electrical contacts; and

a heating element proximate to the deformable member;

wherein said heating element is responsive to a switch control signal controlling heating thereof, whereby the heating of said heating element bends said deformable member and thereby causes said wedge-shaped member to force open said pair of electrical contacts and breaks contact between the incoming power wire and the electrical conductor, and the cooling of said heating element returns said deformable member to its initial state and thereby retracts said wedge shaped member allowing said pair of electrical contacts to re-connect the incoming power wire and the electrical conductor;

wherein power is conveyed from the incoming power wire to a load through the electrical conductor when said pair of electrical contacts are closed, and wherein no power is conveyed to the load via the electrical conductor when said pair of electrical contacts are open.

13. A method, comprising the steps of:

connecting a first one of a pair of electrical contacts to an incoming power wire and the second one of said pair of electrical contacts to an electrical conductor;

thermally coupling a heating element to a deformable member;

positioning a wedge-shaped member proximate to said pair of electrical contacts, said wedge-shaped member mechanically engaged with said deformable member; and

controlling said heating element with a switch control signal, whereby said heating element controllably bends said deformable member thereby causing said wedge-shaped member to open or close said pair of electrical contacts, thus breaking or making contact between the incoming power wire and the electrical conductor.

14. The method of claim 13, wherein said wedge-shaped member comprises a cam having multiple latching states.

15. The method of claim 14, wherein said wedge-shaped member comprises a front wedge section, a central socket, and a rear wedge section, and wherein the method further comprises the step of placing the wedge-shaped member in a latching position by receiving a locking member in the central socket.

16. The method of claim 14, further comprising the step of heating said heating element to switch the wedge-shaped member among the multiple latching states.

17. The method of claim 13, further comprising the steps of:

attaching said wedge-shaped member to a pivoting arm,

providing a cam member on one end of the deformable member; and

rotating said pivoting arm about a pivot point when said deformable member bends, thereby causing the cam member to apply a force to the pivoting arm.

18. The method of claim 13, further comprising the steps of conveying power from the incoming power wire to a load through the electrical conductor when said pair of electrical contacts are in contact with one another, and preventing power from being conveyed to the load when said pair of electrical contacts are separated from one another.

19. The method of claim 13, wherein said heating element comprises a resistive coil.

20. The method of claim 13, further comprising the step of manually activating said switch control signal.

21. The method of claim 13, further comprising the step of activating said switch control signal by an electronic command signal received from a remote source.

22. The method of claim 13, wherein said deformable member comprises a bimetal arm having a top side comprised of a first metallic substance and a bottom side comprised of a second metallic substance, and wherein the second metallic substance has different thermal properties than the first metallic substance.