Electric circuit interrupter

• US 6,515,564 B2
• Filed: 02/17/1999
• Issued: 02/04/2003
• Est. Priority Date: 02/17/1999
• Status: Expired due to Term

• Current Assignee: Eaton Intelligent Power Limited (Eaton Corporation PLC.)
• Original Assignee: Eagle Electric Manufacturing Co., Inc. (Eaton Corporation PLC.)
• Inventors: Rushansky, Yuliy, Leopold, Howard S.
• Primary Examiner(s): Donovan, Lincoln
• Assistant Examiner(s): Nguyen, Tuyen T.
• Application Number:
  US09/251,427
• Publication Number:
  US 20020154488A1
• Time in Patent Office: 1,448 Days
• Field of Search: 335/18, 361/42-51
• US Class Current: 335/18
• CPC Class Codes: H01H 71/0207 Mounting or assembling the different parts of the circuit breaker
• CPC Class Codes: H01H 83/02 operated by earth fault currents H01H83/14 takes precedence
• CPC Class Codes: H01H 83/04 with testing means for indicating the ability of the switch or relay to function properly
• CPC Class Codes: H01H 83/226 with differential transformer

Abstract

A ground fault circuit interrupter (GFCI) for opening a circuit when a ground fault has been detected in an attached circuit includes a current path structure containing no more than one splice and no more than one pair of contacts. A cantilevered movable contact arm and an activation device that moves in a linear fashion can be provided to open the current path structure when a ground fault is detected by the GFCI. In addition, the GFCI can include a transformer boat and solenoid bobbin that are snap fit onto a circuit board and located adjacent each other to provide rigidity to the circuit board and GFCI. The GFCI can be tested by a test switch that includes an integral cantilevered extension from an electrical terminal disposed over a resistor such that the cantilevered extension can be bent by a test button to contact a lead of the resistor and simulate a ground fault condition for the GFCI. Furthermore, the GFCI can include a housing with an outer portion that defines a uniform width channel adjacent a wire contact point to allow quick and easy connection to ground wires.

Claims

1. A fault circuit interrupter device for stopping current flow through a first circuit when a fault has been detected in the first circuit, the fault circuit interrupter device comprising:

a housing;

a substructure located in said housing;

a fault detector located on said substructure and capable of detecting whether a fault has occurred in the first circuit;

a current path structure located on said substructure and having a first end terminating at an input connector and a second end terminating at an output connector, said current path structure including no more than one electrical connection; and

a pair of contact points located in said current path structure and displaceable from each other to open said current path structure and cause current to stop flowing in the first circuit when said fault detector detects that a fault has occurred.

2. The fault circuit interrupter device of claim 1, wherein said current path structure includes no more than one weld.

3. The fault circuit interrupter device of claim 1, wherein said current path structure includes no more than one pair of contact points.

4. The fault circuit interrupter device of claim 1, wherein said output connector is a conventional outlet spring receptacle.

5. The fault circuit interrupter device of claim 1, wherein said output connector is an U-shaped wire clamp connector.

6. The fault circuit interrupter device of claim 1, wherein said current path structure consists essentially of an output terminal, a contact arm, and an input terminal.

7. The fault circuit interrupter device of claim 6, wherein said output connector is integrally formed with said output terminal and said input connector is integrally formed with said input terminal.

8. The fault circuit interrupter device of claim 7, wherein said contact arm is permanently connected to one of said input terminal and said output terminal by a permanent connection, and is selectively connectable to the other of said input terminal and said output terminal by said pair of contact points.

9. The fault circuit interrupter device of claim 8, wherein said permanent connection is a solder joint.

10. The fault circuit interrupter device of claim 1, wherein said fault detector includes a transformer boat located on said substructure and an annular shaped transformer located in said transformer boat, said transformer having a center through hole,

said current path structure includes a first one piece cantilever contact arm structure that has a first end, a second end, and a portion extending through the center through hole of said transformer.

11. The fault circuit interrupter device of claim 10, wherein said first end of said first one piece cantilever contact arm is cantilevered away from said transformer boat and has a distal end on which one of said pair of contact points is located.

12. The fault circuit interrupter device of claim 11, further comprising:

a second current path structure including a second one piece cantilever arm structure connected to said substructure, said second cantilever arm extending through said center through hole of said transformer and cantilevering away from said transformer;

wherein

said housing includes an upper housing, a middle housing, and a lower housing, said middle housing including a separator located between and separating said first one piece cantilever arm structure and said second one piece cantilever arm structure to electrically insulate said first one piece cantilever arm structure from said second one piece cantilever arm structure.

13. The fault circuit interrupter device of claim 11, further comprising:

a second current path structure including a second one piece cantilever arm structure connected to said substructure, said second cantilever arm extending through said center through hole of said transformer and cantilevering away from said transformer;

wherein

said transformer boat includes a separator located between and separating said first one piece cantilever arm structure and said second one piece cantilever arm structure to electrically insulate said first one piece cantilever arm structure from said second one piece cantilever arm structure.

14. The fault circuit interrupter device of claim 10, wherein said transformer boat includes a lock point, and said first one piece cantilever arm includes a stop tab extending from said cantilever arm and contacting said transformer boat lock point to align and lock said first one piece cantilever arm in position relative to said transformer boat and to cantilever said first end of said first one piece cantilever arm about said lock point.

15. The fault circuit interrupter device of claim 10, wherein said current path structure includes an output terminal, an input terminal and said first one piece cantilever arm is spliced to said input terminal, and said pair of contact points electrically connects said first one piece cantilever arm to said output terminal.

16. The fault circuit interrupter device of claim 1, wherein the connection comprises a splice.

17. The fault circuit interrupter device of claim 16, wherein the splice comprises at least one of a soldered and a welded connection.