US4584445A
Expired / Lapsed
US
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Vacuum interrupter
Assignee: Meidensha Corp
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Filing: 1984-03-14
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Granted: 1986-04-22
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Expires: 2004-03-14
Abstract
Abstract A vacuum interrupter of more improved large current interrupting capability and dielectric strength is disclosed. The interrupter has a pair of separable contact-electrodes (13, 24), a vacuum envelope (4) generally electrically insulating and enclosing the pair therewithin, a contact-making portion (19) of 20 to 60% IACS electrical conductivity being a part of one contact-electrode (13) of the pair and being into and out of engagement with the other contact-electrode (24) of the pair, an arc-diffusing portion (20) of 2 to 30% IACS electrical conductivity being the other part of the one contact-electrode (13) and being electrically and mechanically connected to the contact-making portion (19) so as to be spaced from the other contact-electrode (24) when the contact-electrodes (13, 24) are into engagement, and means (14, 15) for applying an axial magnetic field in parallel to an arc established between the contact-electrodes (13, 24) when separated.
Inventors
- 👤 Yoshiyuki Kashiwagi
- 👤 Yasushi Noda
- 👤 Kaoru Kitakizaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:21
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/60; H01H33/66; H01H33/664; H01H33/6644; H01H1/00; H01H1/02; H01H1/0203; H01H11/00; H01H11/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204; Y10T29/49206
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
128 words
A vacuum interrupter comprising a pair of separable contact-electrodes (13, 24), each of which consists of a disc-shaped arc-diffusing portion (20) and a contact-making portion (19) projecting from a central portion of an arcing surface of the arc-diffusing portion (20), a vacuum envelope (4) which is electrically insulating and enclosing the contact-electrodes (13, 24), and means for applying a magnetic field (14, 30) in parallel to an arc established between the contact-electrodes (13, 24) when said contact-electrodes are separated, wherein said arc-diffusing portion (20) of at least one (13) of the contact-electrodes (13, 24) is made of material of 2 to 30% IACS electrical conductivity and said contact-making portion (19) of said at least one contact-electrode (13) is made of material of 20 to 60% IACS electrical conductivity.
Claim 2
Dependent Claim
128 words
A vacuum interrupter comprising a pair of separable contact-electrodes (13, 24), each of which consists of a disc-shaped arc-diffusing portion (20) and a contact-making portion (19) projecting from a central portion of an arcing surface of the arc-diffusing portion (20), a vacuum envelope (4) which is electrically insulating and enclosing the contact-electrodes (13, 24), and means for applying a magnetic field (14, 30) in parallel to an arc established between the contact-electrodes (13, 24) when said contact-electrodes are separated, wherein said arc-diffusing portion (20) of at least one (13) of the contact-electrodes (13, 24) is made of material of 2 to 30% IACS electrical conductivity and said contact-making portion (19) of said at least one contact-electrode (13) is made of material of 20 to 60% IACS electrical conductivity.
Claim 3
Dependent Claim
39 words
A vacuum interrupter as difined in claim 1, wherein said arc-diffusing portion (20) is made of complex metal consisting of 20 to 70% copper by weight, 5 to 40% iron by weight and 5 to 40% chromium by weight.
Claim 4
Dependent Claim
38 words
A vacuum interrupter as defined in claim 1, wherein said arc-diffusing portion (20) is made of material including copper, iron and chromium, and said contact-making portion (19) is made of complex metal consisting of copper, chromium and molybdenum.
Claim 5
Dependent Claim
24 words
A vacuum interrupter as defined in claim 1, wherein said arc-diffusing portion (20) is made of material of 10 to 15% IACS electrical conductivity.
Claim 6
Dependent Claim
39 words
A vacuum interrupter as defined in claim 1, wherein said contact-making portion (19) is made of complex metal consisting of 20 to 70% copper by weight, 5 to 70% chromium by weight and 5 to 70% molybdenum by weight.
Claim 7
Dependent Claim
35 words
A vacuum interrupter as defined in claim 1, wherein said arc-diffusing portion (20) is made of complex metal consisting of 30 to 70% copper by weight and 30 to 70% by weight nonmagnetic stainless steel.
Claim 8
Dependent Claim
33 words
A vacuum interrupter as defined in claim 5, wherein said arc-diffusing portion (20) is made of complex metal consisting of 30 to 70% copper by weight and 30 to 70% nonmagnetic stainless steel.
Claim 9
Dependent Claim
36 words
A vacuum interrupter as defined in claim 1, wherein said arc-diffusing portion (20) is made of complex metal consisting of 30 to 70% copper by weight and a 30 to 70% magnetic stainless steel by weight.
Claim 10
Dependent Claim
35 words
A vacuum interrupter as defined in claim 8, wherein said arc-diffusing portion (20) is made of complex metal consisting of 30 to 70% copper by weight and 30 to 70% ferritic stainless steel by weight.
Claim 11
Dependent Claim
35 words
A vacuum interrupter as defined in claim 8, wherein said arc-diffusing portion (20) is made of complex metal consisting of 30 to 70% copper by weight and 30 to 70% martensitic stainless steel by weight.
Claim 12
Dependent Claim
39 words
A vacuum interrupter as defined in claim 8, wherein said contact-making portion (19) is made of complex metal consisting of 20 to 70% copper by weight, 5 to 70% chromium by weight and 5 to 70% molybdenum by weight.
Claim 13
Dependent Claim
40 words
A vacuum interrupter as defined in claim 9, wherein said contact-making portion (19) is made of complex metal consisting of 20 to 70% copper by weight and 5 to 70% chromium by weight and 5 to 70% molybdenum by weight.
Claim 14
Dependent Claim
40 words
A vacuum interrupter as defined in claim 10, wherein said contact-making portion (19) is made of complex metal consisting of 20 to 70% copper by weight and 5 to 70% chromium by weight and 5 to 70% molybdenum by weight.
Claim 15
Dependent Claim
88 words
A vacuum interrupter as defined in claim 1, wherein said arc-diffusing portion (20) is made of complex metal consisting of a nonmagnetic stainless steel including a plurality of holes of axial direction through said arc-diffusing portion (20) at an areal occupation ratio of 10 to 90%, and infiltrant copper or silver into the nonmagnetic stainless steel, and wherein said contact-making portion (19) is made of complex metal consisting of 20 to 70% copper by weight, 5 to 70% chromium by weight and 5 to 70% molybdenum by weight.
Claim 16
Dependent Claim
88 words
A vacuum interrupter as defined in claim 1, wherein said arc-diffusing portion (20) is made of complex metal consisting of a magnetic stainless steel including a plurality of holes of axial direction through said arc-diffusing portion (20) at an areal occupation ratio of 10 to 90%, and infiltrant copper or silver into the magnetic stainless steel, and wherein said contact-making portion (19) is made of complex metal consisting of 20 to 70% copper by weight, 5 to 70% chromium by weight and 5 to 70% molybdenum by weight.
Claim 17
Dependent Claim
26 words
A vacuum interrupter as defined in claim 1, wherein said arc-diffusing portion (20) is made of austinitic stainless steel of 2 to 3% IACS electrical conductivity.
Claim 18
Dependent Claim
25 words
A vacuum interrupter as defined in claim 1, wherein said arc-diffusing portion (20) is made of ferritic stainless steel of about 2.5% IACS electrical conductivity.
Claim 19
Dependent Claim
24 words
A vacuum interrupter as defined in claim 1, wherein said arc-diffusing portion is made of martensitic stainless steel of about 3.0% IACS electrical conductivity.
Claim 20
Dependent Claim
85 words
A vacuum interrupter as defined in claim 1, wherein said magnetic field applying means (14, 15) comprises a coil-electrode (15) positioned apart from and behind said arc-diffusing portion (20) and an electrical lead member (14) for the coil-electrode, which is made of material of electrical conductivity higher than that of the material for said arc-diffusing portion (20), electrically connected to the coil-electrode (15) and all the portions (22, 25, 26) of which are mechanically and electrically connected to a backsurface of said arc-diffusing portion (20).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |