Electricity: circuit makers and breakers – Electric switch details – Contact
Patent
1985-02-06
1987-08-11
Terapane, John F.
Electricity: circuit makers and breakers
Electric switch details
Contact
200262, 200265, 200266, 200144B, 75236, 75240, 419 17, 419 27, H01H 102, H01H 3366, B22F 326, C22C 2906
Patent
active
046863389
ABSTRACT:
A novel contact electrode material for vacuum interrupters is disclosed, by which the chopping current value inherent in contact material can be reduced so that it is possible to stably interrupt small lagging current due to inductive loads without generating surge voltages. The material is equivalent or superior to the conventional Cu-0.5Bi material in large current interrupting capability and dielectric strength. The material consists essentially of copper, chromium, iron or molybdenum and chromium carbide or molybdenum carbide. The metallographical microstructure is such that copper is infiltrated into a porous matrix formed by mutually bonding chromium powder, iron or molybdenum powder and metal carbide powder in diffusion state. In its manufacturing process, firstly copper is placed onto a powder mixture of chromium, iron or molybdenum, and chromium carbide or molybdenum carbide, and then the copper and the powder mixture is heated within a nonoxidizing atmosphere at a first temperature lower than the copper melting point and thereafter again at a second temperature higher than the copper melting point.
REFERENCES:
patent: 2648747 (1953-08-01), Graves
patent: 3125441 (1964-03-01), Lafferty et al.
patent: 3683138 (1972-08-01), Nabae et al.
patent: 3818163 (1974-06-01), Robinson
patent: 3951872 (1976-04-01), Neely
patent: 4032301 (1977-06-01), Hassler et al.
patent: 4147909 (1979-04-01), Hassler et al.
patent: 4554425 (1985-11-01), Kashiwagi et al.
patent: 4584445 (1986-04-01), Kashiwagi et al.
Handbook of Powder Metallurgy, Hausner, 1973, pp. 12-13.
Kashiwagi Yoshiyuki
Kitakizaki Kaoru
Noda Yasushi
Jorgensen Eric
Kabushiki Kaisha Meidensha
Terapane John F.
LandOfFree
Contact electrode material for vacuum interrupter and method of does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Contact electrode material for vacuum interrupter and method of , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Contact electrode material for vacuum interrupter and method of will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-403832