Vacuum circuit interrupter

A vacuum interrupter for electric power having a vacuum vessel, the vacuum vessel comprising:

• (a) an insulating envelope made of ceramic or crystallized glass having a metallized layer at each end thereof;
• (b) a first metallic end plate made of copper on the periphery of which one metallized layer of said insulating envelope is brazed with the metallized layer of said insulating envelope sandwiched between said envelope and the first end plate periphery so as to form a hermetic seal;
• (c) a second metallic end plate made of copper on the periphery of which the other metallized layer of said insulating envelope is brazed with the other metallized layer of said insulating envelope sandwiched between said envelope and the second end plate periphery so as to form a hermetic seal;
• (d) a stationary electrode holder fixedly extending through said first metallic end plate and having a stationary electrode contact brazed to the inner end thereof;
• (d) a movable electrode holder extending through said second metallic end plate so as to be able to move in a given direction and having a movable electrode contact brazed to the inner end thereof, said movable electrode contact being in contact with said stationary electrode contact when the vacuum interrupter is closed and separated therefrom when the vacuum interrupter is open;
• (f) an arc shielding member located within the insulating envelope so as to surround said stationary and movable electrode contacts and being brazed to said second metallic end plate at one end thereof;
• and
• (g) a bellows located within said arc shielding member, brazed to said movable electrode holder at one end thereof and to said second metallic end plate at the other end thereof.

A vacuum interrupter for electric power having a vacuum vessel, the vacuum vessel comprising:

• (a) an insulating envelope made of ceramic or crystallized glass having a metallized layer at each end thereof;
• (b) a first metallic end plate made of copper on the periphery of which one metallized layer of said insulating envelope is brazed with the metallized layer of said insulating envelope sandwiched between said envelope and the first end plate periphery so as to form a hermetic seal;
• (c) a second metallic end plate made of copper on the periphery of which the other metallized layer of said insulating envelope is brazed with the metallized layer of said insulating layer sandwiched between said envelope and the second plate periphery so as to form a hermetic seal;
• (d) a stationary electrode holder fixedly extending through said first metallic end plate and having a stationary electrode contact brazed to the inner end thereof;
• (e) a movable electrode holder extending through said second metallic end plate so as to be able to move in a given direction and having a movable electrode contact brazed to the inner end thereof, said movable electrode contact being in contact with said stationary electrode contact when the vacuum interrupter is closed and separated therefrom when the vacuum interrupter is open;
• (f) an arc shielding member located within said insulating envelope so as to surround said stationary and novable electrode contacts and being brazed to said second metallic end plate at one end thereof;
• (g) a bellows located within said arc shielding member, brazed to said movable electrode holder at one end thereof and to said second metallic end plate at the other end thereof;
• and
• (h) said first metallic end plate being provided with first means at the center thereof for inserting and brazing said stationary electrode holder and second means at the periphery thereof for brazing to the metallized layer of one end of said insulating envelope, and said second metallic end plate being provided with third means at the center thereof for inserting said movable electrode holder to be able to move in a given direction, fourth means along said third means for brazing to one end of said bellows, fifth means along said fourth means for brazing to one end of said arc shielding member, and sixth means along the periphery of said second metallic plate for brazing to the metallized layer of said insulating envelope.

A vacuum interrupter for electric power having a vacuum vessel, the vacuum vessel comprising:

• (a) a cylindrical insulating envelope made of ceramic or crystallized glass having a metallized layer at each end thereof;
• (b) a first metallic end plate made of copper located on one end of said cylindrical insulating envelope;
• (c) a second metallic end plate made of copper located on the other end of said cylindrical insulating envelope;
• (d) a stationary electrode holder fixedly extending through said first metallic end plate, at the inner end of which a stationary electrode contact is provided;
• (e) a movable electrode holder extending through said second metallic end plate so as to be able to move in a given direction at the inner end of which a movable electrode contact is provided;
• (f) an arc shielding member located within said cylindrical insulating envelope so as to surround said stationary and movable electrode contacts;
• (g) a bellows located within said arc shielding member for movably sealing said movable electrode holder with said second metallic end plate;
• (h) means for connecting said first metallic end plate with one metallized layer of said cylindrical insulating envelope, connecting said second metallic end plate with the other metallized layer of said cylindrical insulating envelope, connecting said first metallic end plate with said stationary electrode holder, and connecting one end each of said arc shielding member and bellows with said second metallic end plate;
• (i) said and second metallic end plates being substantially thick each having a flange at the peripheral portion and said connecting means hermetically brazes the flange of each of said first and second metallic end plates with the corresponding metallized layer of said cylindrical insulating envelope;
• (j) said second metallic end plate being provided with a plurality of relatively small recesses with an angular distance from one another at the near center thereof brazed to one end of said bellows and other relatively small recesses with an angular distance from one another at the periphery portion thereof brazed to one end of said arc shielding member.