Electrical wiring device

Patent metadata

Field	Value
Publication number	US-11870239-B2
Application number	US-202217942916-A
Country	US
Kind code	B2
Filing date	Sep 12, 2022
Priority date	Jul 31, 2015
Publication date	Jan 9, 2024
Grant date	Jan 9, 2024

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.

First claim

The invention claimed is:

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 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 terminal, the first terminal configured to contact the load terminal and the second terminal configured to contact the face terminal, the brush conductor including a second portion offset from the first portion such that the first portion and the second portion are positioned in separate planes, the brush conductor including a bridge connected between the first portion and the second portion, movement of the brush conductor to the closed position causing deflection of the bridge, deflection of the bridge creating a moment to provide a contact force on the first terminal.

2. The circuit interrupting device of claim 1 , wherein, while 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, while 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.

3. 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 bridge portion forming an angle relative to the first plane.

4. The circuit interrupting device of claim 1 , wherein a pivoting movement of the brush conductor causes the second terminal to contact the face terminal before the first terminal contacts the load terminal.

5. The circuit interrupting device of claim 1 ,
wherein as the brush conductor moves toward the closed position, the first portion pivots about the first end and drives the second terminal into contact with the face terminal, and
wherein continued movement of the brush conductor toward the closed position causes the second portion to deflect about the second end of the brush conductor, the continued movement drives the first terminal into contact with the load terminal.

6. 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.

7. The circuit interrupting device of claim 6 , 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, a cantilevered 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.

8. The circuit interrupting device of claim 6 , 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 8 , 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 8 , 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. 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 and biasing the brush conductor toward the closed position, and
a latch plate supported in the housing and movable relative to the housing in the first direction, wherein actuation of a solenoid moves the latch plate in the first direction, thereby releasing the housing to move along the axis.

14. The circuit interrupting device of claim 13 , 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.

15. The circuit interrupting device of claim 13 , 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.

16. The circuit interrupting device of claim 13 , wherein the latch assembly includes a switch member positioned adjacent an end of the housing, the switch including a biasing structure configured to contact a circuit board in a predetermined area to complete a circuit.

17. The circuit interrupting device of claim 16 , wherein the biasing structure includes a pair of flanges resiliently connected to a main portion of the switch member, each of the flanges 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.

18. The circuit interrupting device of claim 17 , wherein closing the circuit actuates the solenoid.

Assignees

• Hubbell Inc

Inventors

• He Zhouxiang

Classifications

• H02H3/162 Primary

  for AC systems · CPC title

• H01H83/04 Primary

  with testing means for indicating the ability of the switch or relay to function properly · CPC title

• H01H2071/044

  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 title

• H01H2083/045

  Auxiliary switch opening testing circuit in synchronism with the main circuit · CPC title

• H02H3/338

  also responsive to wiring error, e.g. loss of neutral, break · CPC title