Electrode of vacuum circuit breaker, and method of producing electrode of vacuum circuit breaker

• US 6,765,168 B2
• Filed: 02/27/2002
• Issued: 07/20/2004
• Est. Priority Date: 05/09/2001
• Status: Expired due to Term

• Current Assignee: Kabushiki Kaisha Meidensha (Meidensha Corporation)
• Original Assignee: Kabushiki Kaisha Meidensha (Meidensha Corporation)
• Inventors: Fukatsu, Yoshihiro, Matsui, Yoshihiko, Nishijima, Akira, Takebuchi, Hidemitsu
• Primary Examiner(s): DONOVAN, LINCOLN D
• Application Number:
  US10/083,500
• Publication Number:
  US 20020166841A1
• Time in Patent Office: 874 Days
• Field of Search: 218/118, 218/123-128
• US Class Current: 218/123
• CPC Class Codes: H01H 33/6642 having cup-shaped contacts, the cylindrical wall of which being provided with inclined slits to form a coil

Abstract

An electrode of a vacuum circuit breaker has a cup member and a contact. The cup member has an opening and a periphery which is formed with a slit so as to form a coil section. An electric current flows in the coil section so as to generate a longitudinal magnetic field in a direction along an axis of the cup member. The slit is bent and continuously extends on the periphery from a first end of the cup member to a second end of the cup member opposite to the first end of the cup member. The contact is shaped into a plate, and seals the opening of the cup member.

Claims

1. An electrode of a vacuum circuit breaker comprising:

a cup member having an opening and a periphery which is formed with a slit so as to form a coil section, an electric current flowing in the coil section so as to generate a longitudinal magnetic field in a direction along an axis of the cup member, the slit being bent and continuously extending on the periphery from a first end of the cup member to a second end of the cup member opposite to the first end of the cup member; and

a contact shaped into a plate, and sealing the opening of the member

wherein

the bent slit comprises of;

a first line segment having a first end which is substantially perpendicular to a reverse face of the contact, the reverse face sealing the opening of the cup member, and

a second line segment continuously connected to a second end of the first line segment opposite to the first end of the first line segment, the first line segment and the second line segment forming an inclination greater than a right angle, the second line segment being substantially parallel to the reverse face of the contact.

2. The electrode of the vacuum circuit breaker as claimed in claim 1, in which the bent slit is formed stepwise.

3. The electrode of the vacuum circuit breaker as claimed in claim 1, further comprising a plurality of the bent slits.

4. The electrode of the vacuum circuit breaker as claimed in claim 1, in which the contact is shaped substantially into a disk plate.

5. The electrode of the vacuum breaker as claimed in claim 2, wherein

the inclination formed by the first line segment and the second line segment of the bent slit is substantially rounded.

6. The electrode of the vacuum circuit breaker as claimed in claim 3, further comprising five or more number of the bent slits.