US4539451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch
Assignee: Mitsubishi Electric Corp
•
Filing: 1983-11-10
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Granted: 1985-09-03
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Expires: 2003-11-10
Abstract
Abstract A switch for making and breaking an electric current and having an arc-extinguishing mechanism. Said switch includes a fixed contact plate having a fixed contact thereon, a movable contact plate having a fixed contact adapted for movement to come into and go out of said fixed contact and an arc deflecting plate provided substantially parallel to said movement. Said arc deflecting plate is made of magnetic metal and is formed with a U-shaped portion in proximity to said fixed contact plate.
Inventors
- 👤 Teijiro Mori
- 👤 Yuichi Wada
- 👤 Shizutaka Nishisako
- 👤 Hiroaki Tazawa
- 👤 Shigeru Masuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:40
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/30; H01H9/34; H01H9/36
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
138 words
A switch comprising: fixed contact means; movable contact means adapted for movement to come into contact with said fixed contact means and to go out of contact with the same such that a first gap is defined therebetween; and an arc deflecting plate of magnetic metal provided generally in parallel with said movement, said arc deflecting plate being formed with a U-shaped tongue-like bent portion in proximity to said fixed contact means, said fixed contact means including a fixed contact plate and a fixed contact affixed to said fixed contact plate at an end portion thereof, said fixed contact plate extending in a direction generally perpendicular to said arc deflecting plate to define a second gap therebetween, said U-shaped portion having an outer bottom portion in facing relation to a selected one of said first and second gaps.
Claim 2
Dependent Claim
138 words
A switch comprising: fixed contact means; movable contact means adapted for movement to come into contact with said fixed contact means and to go out of contact with the same such that a first gap is defined therebetween; and an arc deflecting plate of magnetic metal provided generally in parallel with said movement, said arc deflecting plate being formed with a U-shaped tongue-like bent portion in proximity to said fixed contact means, said fixed contact means including a fixed contact plate and a fixed contact affixed to said fixed contact plate at an end portion thereof, said fixed contact plate extending in a direction generally perpendicular to said arc deflecting plate to define a second gap therebetween, said U-shaped portion having an outer bottom portion in facing relation to a selected one of said first and second gaps.
Claim 3
Dependent Claim
14 words
A switch according to claim 1, wherein said selected gap includes the first gap.
Claim 4
Dependent Claim
25 words
A switch according to claim 2, wherein said arc deflecting plate is formed with at least one gas-flow hole in proximity to the U-shaped portion.
Claim 5
Dependent Claim
88 words
A switch according to claim 2, wherein said arc deflecting plate includes a channel-shaped plate having a main portion and wing portions extending from respective sides thereof, said channel-shaped plate substantially surrounding the fixed contact means and the movable contact means, said fixed contact plate extending into an opening in said main portion in a direction perpendicular to said main portion, said U-shaped tongue-like portion being provided in said opening in said main portion and having a width substantially the same as the distance between said wing portions.
Claim 6
Dependent Claim
37 words
A switch according to claim 2, wherein said U-shaped portion is positioned substantially midway in the first gap between the movable contact means and the fixed contact means when said movable contact means takes an open position.
Claim 7
Dependent Claim
24 words
A switch according to claim 4, wherein said arc deflecting plate is formed with at least one gas-hole in proximity to the U-shaped portion.
Claim 8
Dependent Claim
16 words
A switch according to claim 2, wherein said U-shaped portion has a tapering free end tongue.
Claim 9
Dependent Claim
25 words
A switch according to claim 7, wherein said arc deflecting plate is formed with at least one gas-flow hole in proximity to the U-shaped portion.
Claim 10
Dependent Claim
87 words
A switch according to claim 2, wherein said arc deflecting plate includes a channel-shaped plate having a main portion and wing portions extending from respective sides thereof, said channel-shaped plate substantially surrounding the fixed contact means and the movable contact means, said fixed contact plate extending into an opening in said main portion in a direction perpendicular to said main portion, said U-shaped portion being provided in said opening in said main portion and having at least one notch opening in facing relation to the fixed contact.
Claim 11
Dependent Claim
12 words
A switch according to claim 9, wherein said notch includes a slit.
Claim 12
Dependent Claim
14 words
A switch according to claim 1, wherein said selected gap includes the second gap.
Claim 13
Dependent Claim
17 words
A switch according to claim 1, wherein said arc deflecting plate is made of ferritic stainless steel.
References Cited (Backward Citations)
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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) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |