Novel circuit interrupting device with interconnecting reset and test buttons

• US 20090161271A1
• Filed: 12/08/2008
• Published: 06/25/2009
• Est. Priority Date: 09/30/2007
• Status: Active Grant

• Current Assignee: Huadao Huang
• Original Assignee: Huadao Huang
• Inventors: Huang, Huadao, Lu, Huayang
• Granted Patent: US 8,233,251 B2
• Time in Patent Office: Days
• US Class Current: 361/42
• CPC Class Codes: H01H 1/0015 Means for testing or for inspecting contacts, e.g. wear indicator measuring circuits G01R31/3274
• CPC Class Codes: H01H 83/04 with testing means for indicating the ability of the switch or relay to function properly

Abstract

The present invention provides a novel circuit interrupting device, preferably a ground fault circuit interrupter, which contains a reset button that is capable of interacting with a test button to perform an end-of-life-component test on the circuit interrupting device. The circuit interrupting device also contains a reset switch coupled to the reset button which is capable of disallowing reset if the device is miswired and/or fails the end-of-life-component test. Only when the circuit interrupting device is properly wired, in a tripped state, and all of the key components in the circuit interrupting device are working properly, the depression of the reset button allows the device to be reset.

Claims

1. A circuit interrupting device having a pair of power input terminals, a pair of power output terminals, and a pair of user accessible output terminals, which are electrically separated from each other in a tripped state and electrically connected in a reset state;

said circuit interrupting device further comprising;

a reset button;

a test button;

a flexible metal piece located underneath said test button; and

a test resistor located below said flexible metal piece;

wherein when said circuit interrupting device is properly wired and at said tripped state, depressing said reset button drives said test button to move downwards with said reset button so that said flexible metal piece beneath said test button comes into contact with said test resistor to generate a simulated leakage current to test whether components of said circuit interrupting device are working properly;

wherein when said components of said circuit interrupting device are working properly, said circuit interrupting device is capable of being reset; and

wherein when at least one of said components of said circuit interrupting device is not working properly, said circuit interrupting device cannot be reset.

2. The circuit interrupting device according to claim 1, wherein said reset button has a first protrusion extending outward;

wherein said test button has a second protrusion extending outward and at a location corresponding to said first protrusion;

wherein when said reset button is depressed, said first protrusion drives said test button to move downwards with said reset button through said second protrusion.

3. The circuit interrupting device according to claim 1, further comprising a power output indicator that is turned on when said components of said circuit interrupting device are working properly.

4. The circuit interrupting device according to claim 1, wherein when said reset button is at said tripped or reset state, said test resistor is disconnected from said flexible metal piece and no simulated leakage current is generated.

5. The circuit interrupting device according to claim 1, wherein said components of said circuit interrupting device comprises a differential transformer, a leakage circuit detection integrated chip, a silicon controlled rectifier (SCR), and/or a solenoid coil.

6. The circuit interrupting device according to claim 1, wherein one end of said flexible metal piece is positioned below said test button and the other end is electrically connected to one of said pair of power input terminals.

7. The circuit interrupting device according to claim 1, wherein one end of said test resistor is suspended below said flexible metal piece and the other end is connected to one of said pair of power input terminals.

8. The circuit interrupting device according to claim 1, further comprising:

a pair of input flexible metal pieces electrically coupled to said pair of power input terminals;

wherein each of said pair of power input flexible metal pieces contains a movable contact;

a pair of output terminal metal pieces coupled to said pair of power output terminals;

wherein each of said pair of power output terminal metal pieces contains a pair of fixed contacts; and

a pair of user accessible output flexible metal pieces electrically coupled to a pair of output conductors that is coupled to said pair of user accessible output terminals;

wherein each of said pair of user accessible output flexible metal pieces contains a movable contact;

wherein said movable contact on each of said pair of input flexible metal pieces and said movable contact on each of said pair of output metal pieces are capable of connecting to or disconnecting from said pair of fixed contacts on each of said output terminal metal pieces respectively.

9. The circuit interrupting device according to claim 8, further comprising a reset/tripping mechanical device capable of causing said pair of input flexible metal pieces, said pair of user accessible output flexible metal pieces, and said pair of output terminal metal pieces to be connected or disconnected.

10. The circuit interrupting device according to claim 9, wherein said reset/tripping mechanical device comprises:

said reset button;

a reset directional lock located under said reset button, wherein said reset directional lock has a blunt bottom surface;

a reset spring slid onto an upper part of said reset directional lock;

a quick trip spring slid onto a lower part of said reset directional lock;

a tripping device;

a locking member; and

a reset switch.

11. The circuit interrupting device according to claim 10, wherein when said circuit interrupting device is properly wired and said reset button is depressed, if said components of said circuit interrupting device are working properly, said reset/tripping mechanical device causes said circuit interrupting device to be reset;

and if at least one of said components of said circuit interrupting device is not working properly, said reset/tripping mechanical device does not act to allow said circuit interrupting device to be reset.

12. The circuit interrupting device according to claim 1, further comprises a reset switch which is coupled to said reset button;

wherein said reset switch comprises a top metal piece, a middle metal piece, and a bottom electric contact;

wherein said top metal piece is located at the top of said reset switch, said middle metal piece is located below said top metal piece; and

said bottom electric contact is located below said middle metal piece;

wherein when said reset button is at said tripped state, none of said top metal piece, said middle metal piece, and said bottom electric contact is in contact with each other;

wherein when said reset button is depressed, said middle metal piece and said bottom electric contact come into contact with each other; and

wherein when said reset button is at a reset state, said top metal piece and said middle metal piece come into contact with each other.

13. The circuit interrupting device according to claim 12, wherein each of said top metal piece, said middle metal piece, and said bottom electric contact is electrically connected to one of said pair of power input terminals.

14. The circuit interrupting device according to claim 13, wherein said top metal piece is electrically coupled to a neutral power input terminal, said middle metal piece is electrically coupled to a hot power input terminal, and said bottom electric contact is electrically coupled to said neutral power input terminal

15. The circuit interrupting device according to claim 14, wherein said top metal piece and said bottom electric contact passes through a silicon controlled rectifier (SCR) to be electrically connected to said neutral power input terminal;

and wherein said middle metal piece passes through a solenoid coil to be electrically connected to said hot power input terminal.

16. The circuit interrupting device according to claim 10, wherein said tripping device extends outwards to form a pair of lifting arms;

wherein said pair of input flexible metal pieces and said pair of user accessible output flexible metal pieces are rested on said pair of lifting arms.

17. The circuit interrupting device according to claim 10, wherein said reset directional lock has a larger diameter in an upper part than in a lower part.

18. The circuit interrupting device according to claim 1, wherein said circuit interrupting device further comprises a pair of discharge metal pieces electrically coupled to said pair of power input terminals;

wherein each of said pair of discharge metal pieces has a tip facing but not contacting each other;

whereby during a high voltage surge said discharge metal pieces cause a discharge of electricity through said tips of said discharge metal pieces to protect said circuit interrupting device from being damaged due to said high voltage surge.

19. The circuit interrupting device according to claim 1, wherein when said circuit interrupting device is at said reset state, a depression of said test button causes said flexible metal piece and said test resistor to be in contact with each other to generate said leakage current to trip said circuit interrupting device.

20. A circuit interrupting device having a pair of power input terminals, a pair of power output terminals, and a pair of user accessible output terminals, which are electrically separated from each other in a tripped state and electrically connected in a reset state;

said circuit interrupting device further comprising;

a reset switch capable of preventing reset when said circuit interrupting device is not properly wired and/or at least one component of said circuit interrupting device is not working properly;

wherein said reset switch comprises a top metal piece, a middle metal piece, and a bottom electric contact;

wherein said top metal piece is located at the top of said reset switch, said middle metal piece is located below said top metal piece; and

said bottom electric contact is located below said middle metal piece; and

wherein each of said top metal piece, said middle metal piece, and said bottom electric contact is electrically coupled to one of said pair of power input terminals.

21. The circuit interrupting device according to claim 20, wherein said component of said circuit interrupting device is at least one selected from the group consisting of a differential transformer, a leakage current detection integrated chip, a silicon controlled rectifier, a solenoid coil, and a mixture thereof.

22. The circuit interrupting device according to claim 20, wherein said reset switch is coupled to a reset button;

wherein when said reset button is at a tripped state, none of said top metal piece, said middle metal piece, and said bottom electric contact is in contact with each other;

wherein when said reset button is depressed, said middle metal piece and said bottom electric are in contact with each other; and

wherein when said reset button is at a reset state, said top metal piece and said middle metal piece are in contact with each other.

23. The circuit interrupting device according to claim 20, wherein said top metal piece and said bottom electric contact are adapted to pass through a silicon controlled rectifier (SCR) to be electrically connected to a neutral power input terminal;

and wherein said middle metal piece is adapted to pass through a solenoid coil to be electrically connected to a hot power input terminal.

24. The circuit interrupting device according to claim 22, further comprising:

a reset button;

a test button;

a flexible metal piece located underneath said test button; and

a test resistor located below said flexible metal piece;

wherein when said circuit interrupting device is properly wired and at said tripped state, a depression of said reset button drives said test button to move downwards with said reset button so that said flexible metal piece underneath said test button comes into contact with said test resistor to generate a simulated leakage current to test whether said components of said circuit interrupting device are working properly;

wherein when said components of said circuit interrupting device are working properly, said contact between said middle metal piece and said bottom electric contact allows said circuit interrupting device to be reset; and

wherein when at least one of said components of said circuit interrupting device is not working properly, said contact between said middle metal piece and said bottom electric contact does not allow said circuit interrupting device to be reset.

25. The circuit interrupting device according to claim 24, wherein when said circuit interrupting device is in said reset state, a depression of said test button causes said flexible metal piece and said test resistor to be in contact with each other to generate said leakage current to trip said circuit interrupting device.

26. The circuit interrupting device according to claim 20, further comprising a power output indicator that is turned on when said components of said circuit interrupting device are working properly.

27. The circuit interrupting device according to claim 20, further comprising:

a pair of input flexible metal pieces electrically coupled to said pair of power input terminals;

wherein each of said pair of power input flexible metal pieces contains a movable contact;

a pair of output terminal metal pieces coupled to said pair of power output terminals;

wherein each of said pair of power output terminal metal pieces contains a pair of fixed contacts; and

a pair of user accessible output flexible metal pieces electrically coupled to a pair of output conductors that is adapted to be coupled to said pair of user accessible output terminals;

wherein each of said pair of user accessible output flexible metal pieces contains a movable contact;

wherein said movable contact on each of said pair of input flexible metal pieces and said movable contact on each of said pair of output metal pieces are capable of connecting to or disconnecting from said pair of fixed contacts on each of said output terminal metal pieces respectively.

28. The circuit interrupting device according to claim 27, further comprising a reset/tripping mechanical device capable of causing said pair of input flexible metal pieces, said pair of user accessible output flexible metal pieces, and said pair of output terminal metal pieces to be connected or disconnected.

29. The circuit interrupting device according to claim 20, wherein said circuit interrupting device further comprises a pair of discharge metal pieces electrically coupled to said pair of power input terminals;

wherein each of said pair of discharge metal pieces has a tip facing but not contacting each other;

whereby during a high voltage surge said discharge metal pieces cause a discharge of electricity through said tips of said discharge metal pieces to protect said circuit interrupting device from being damaged due to said high voltage surge.