Metal working – Method of mechanical manufacture – Electrical device making
Patent
1995-05-03
1997-11-18
Echols, P. W.
Metal working
Method of mechanical manufacture
Electrical device making
2281246, 2281801, 218136, H01H 1106, B23K 3102
Patent
active
056874723
ABSTRACT:
A method for manufacturing a vacuum interrupter including, a vacuum enclosure composed of an insulating tube sealed by metal flanges, a pair of electrodes in the vacuum enclosure which are able to make and break contact, and a pair of conducting shafts. The method includes the steps of preparing a fixed-side assembly composed of a fixed electrode, a fixed-side conducting shaft and a fixed-side flange jointed as one unit, preparing a movable-side subassembly composed of a movable electrode, a movable-side conducting shaft and a movable-side flange jointed as one unit, preparing an insulating tube subassembly composed of the insulating tube, preparing an assembly such that the movable-side, insulating tube, and fixed-side subassemblies are superimposed with first solders for gas-tight sealing being inserted between the movable-side and fixed-side subassemblies and end surfaces of the insulating tube subassembly and with a second solder for contact soldering being inserted between the contact and the electrode, and heating and evacuating the assembly in a vacuum furnace to evacuate inside the vacuum enclosure and to solder by the first solders and the second solder, thereby to obtain the vacuum interrupter. Whereby gas-tight soldering and soldering of the contact and the electrode are carried out simultaneously in the heating and evacuating step.
REFERENCES:
patent: 4933518 (1990-06-01), Yin
Patent Abstracts of Japan, vol. 15, No. 155 (M-1104), Apr. 18, 1991, JP 03 027871, Feb. 6, 1991.
Aihara Tadahiro
Honma Mitsutaka
Seki Tsuneyo
Somei Hiromichi
Yamamoto Atsushi
Echols P. W.
Kabushiki Kaisha Toshiba
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