ELECTRICAL WIRING DEVICE

• US 20170033550A1
• Filed: 10/26/2015
• Published: 02/02/2017
• Est. Priority Date: 07/31/2015
• Status: Active Grant

• Current Assignee: Hubbell, Inc.
• Original Assignee: Hubbell, Inc.
• Inventors: He, Zhouxiang
• Granted Patent: US 10,079,484 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01H 2071/044 Monitoring, detection or measuring systems to establish the end of life of the switching device, can also contain other on-line monitoring systems, e.g. for detecting mechanical failures
• CPC Class Codes: H01H 2083/045 Auxiliary switch opening testing circuit in synchronism with the main circuit
• CPC Class Codes: H01H 83/04 with testing means for indicating the ability of the switch or relay to function properly
• CPC Class Codes: H02H 3/162 for ac systems

Abstract

A circuit interrupting device includes an input conductor for electrically connecting to an external power supply, a load conductor for electrically connecting to a downstream load, a face conductor for electrically connecting to an external load, and a brush conductor in electrical communication with the input conductor and movable between a closed position and an open position. The brush conductor includes a second portion offset from a first portion such that a first terminal and a second terminal are positioned on separate planes. When the brush conductor is in the closed position, the first terminal contacts the load terminal and the second terminal contacts the face terminal to provide electrical communication between the input conductor, the load conductor, and the face conductor. When the brush conductor is in the open position, the first terminal is spaced apart from the load terminal and the second terminal is spaced apart from the face terminal.

Claims

1. A circuit interrupting device comprising:

an input conductor for electrically connecting to an external power supply;

a load conductor for electrically connecting to a downstream load, the load conductor including a load terminal;

a face conductor for electrically connecting to an external load, the face conductor including a face terminal; and

a brush conductor in electrical communication with the input conductor and movable between a closed position and an open position, the brush conductor including a first portion supporting a first terminal and a second portion supporting a second terminal, the second portion offset from the first portion such that the first terminal and the second terminal are positioned on separate planes,

wherein, when the brush conductor is in the closed position, the first terminal contacts the load terminal and the second terminal contacts the face terminal to provide electrical communication between the input conductor, the load conductor, and the face conductor,

wherein, when the brush conductor is in the open position, the first terminal is spaced apart from the load terminal and the second terminal is spaced apart from the face terminal to inhibit electrical communication between the input conductor, the load conductor, and the face conductor.

2. The circuit interrupting device of claim 1, wherein the first portion of the brush conductor extends in a first plane and the second portion of the brush conductor extends in a second plane parallel to and offset from the first plane, the brush conductor further including a bridge portion extending between the first portion and the second portion, the bridge portion forming an angle relative to the first plane.

3. The circuit interrupting device of claim 1, further comprising a latch assembly including a housing having an arm engaging the brush conductor, the housing movable between a first position and a second position,

wherein when the housing is in the first position, the arm biases the brush conductor toward the closed position,

wherein when the housing is in the second position, the brush conductor moves toward the open position.

4. The circuit interrupting device of claim 3, wherein the housing arm urges one of the first terminal and the second terminal into contact with the load terminal and the face terminal, respectively, before the other of the first terminal and the second terminal contacts the load terminal and the face terminal, respectively.

5. The circuit interrupting device of claim 3, wherein the brush conductor includes a first end connected to the input conductor and a second end opposite the first end, the first terminal positioned proximate the second end, the second portion extending away from the second end such that the second terminal is positioned between the first end and the second end of the brush conductor,

wherein when the housing is in the first position the housing arm pivots the brush conductor about the first end.

6. The circuit interrupting device of claim 5, wherein a pivoting movement of the brush conductor about the first end causes the second terminal to contact the face terminal before the first terminal contacts the load terminal.

7. The circuit interrupting device of claim 5, wherein as the housing moves toward the first position, the housing arm deflects the first portion to pivot about the first end and drives the second terminal into contact with the face terminal, and

wherein continued movement of the housing toward the first position causes the second portion to deflect about the second end of the brush conductor, the continued movement of the housing driving the first terminal into contact with the load terminal.

8. The circuit interrupting device of claim 3, further comprising a circuit board positioned proximate an end of the housing, wherein the latch assembly further includes a contact member coupled to the end of the housing and selectively engaging the circuit board to complete a circuit.

9. The circuit interrupting device of claim 7, wherein the contact member includes a central portion coupled to the end of the housing and a pair of flanges, the flanges extending away from the flat portion at an angle to provide a resiliency in the flanges relative to the central portion, each flange including an end for contacting a predetermined area on the circuit board.

10. The circuit interrupting device of claim 7, further comprising a solenoid movable in a first direction, wherein the latch housing further includes a latch plate supported in the housing and movable relative to the housing in the first direction, wherein actuation of the solenoid moves the latch plate in the first direction, thereby allowing the housing to move to the second position.

11. The circuit interrupting device of claim 1, wherein the input conductor is a neutral line conductor.

12. The circuit interrupting device of claim 1, wherein the input conductor is a phase line conductor.

13. The circuit interrupting device of claim 12, wherein the load conductor is a first load conductor, the face conductor is a first face conductor, and the brush conductor is a first brush conductor, and further comprising:

a neutral line conductor for electrically connecting to the external power supply

a second load conductor for electrically connecting to a downstream load, the second load conductor including a second load terminal;

a second face conductor for electrically connecting to the external load, the second face conductor including a second face terminal; and

a second brush conductor in electrical communication with the neutral line conductor and movable between a closed position and an open position, the second brush conductor including a first portion supporting a first terminal and a second portion supporting a second terminal, the second portion offset from the first portion such that the first terminal and the second terminal are positioned on separate planes,

wherein, when the second brush conductor is in the closed position, the first terminal contacts the second load terminal and the second terminal contacts the second face terminal to provide electrical communication between the neutral line conductor, the second load conductor, and the second face conductor,

wherein, when the second brush conductor is in the open position, the first terminal is spaced apart from the second load terminal and the second terminal is spaced apart from the second face terminal to inhibit electrical communication between the neutral line conductor, the second load conductor, and the second face conductor.

14. A circuit interrupting device comprising:

a circuit board;

a line conductor for electrically connecting to an external power supply;

a load conductor for electrically connecting to an external load, the load conductor including a load terminal;

a face conductor for electrically connecting to another external load, the face conductor including a face terminal;

a brush conductor in electrical communication with the line conductor and movable between a closed position and an open position, the brush conductor including a first terminal selectively contacting the face terminal and a second terminal selectively contacting the load terminal; and

a latch assembly including,

a housing movable between along an axis, the housing including an arm for biasing the brush conductor toward the closed position, the housing further including an end positioned proximate the circuit board, and

a switch member including a main portion coupled to the end of the housing, and a pair of flanges resiliently connected to the main portion, each flange extending away from the main portion at an angle and including an end configured to contact the circuit board in a predetermined area, such that simultaneous contact of each flange end with the circuit board completes a circuit.

15. The circuit interrupting device of claim 14, further comprising a solenoid movable in a first direction perpendicular to the axis, wherein the latch housing further includes a latch plate supported in the housing and movable relative to the housing in the first direction, wherein actuation of the solenoid moves the latch plate in the first direction, thereby releasing the housing to move along the axis.

16. The circuit interrupting device of claim 15, wherein the latch plate includes an opening, the housing including a tab extending into the opening to limit the maximum travel of the latch plate relative to the housing.

17. The circuit interrupting device of claim 15, further comprising a reset shaft movable along the axis,

wherein the housing includes a bore extending along the axis and receiving at least a portion of the reset shaft, the latch plate including a hole extending parallel to the bore,

wherein when the hole is offset relative to the bore, the plate engages the shaft to secure the shaft relative to the latch housing,

wherein when the hole is aligned with the bore, the shaft is permitted to move relative to the housing and the housing is biased away from the brush conductor.

18. The circuit interrupting device of claim 17, wherein the simultaneous contact of each flange end of the switch member closes a circuit to actuate the solenoid and move the latch plate such that the hole is aligned with the bore of the housing.

19. A method for closing a circuit for an electrical wiring device, the wiring device including a face conductor including a face terminal and a load conductor including a load terminal, the method comprising:

moving a brush conductor in a first direction by a first distance, the brush conductor including a first portion having a first terminal and a second portion having a second terminal, the second terminal contacting one of the load terminal and the face terminal; and

moving the brush conductor in the first direction by a second distance, a portion of the brush conductor deflecting such that the first terminal contacts the other of the load terminal and the face terminal.

20. The method of claim 19, wherein the first terminal is positioned on a first plane and the second terminal is positioned on a second plate offset from the first plane.

21. The method of claim 19, wherein moving the brush conductor in the first direction by a second distance includes bending the second portion relative to the first portion.