US3597712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch element
Assignee: KDDI Corp
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Filing: 1970-02-09
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Granted: 1971-08-03
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Expires: 1990-02-09
Abstract
Abstract A switch element having at least one pair of contacts to be switched-on and switched-off states, where the switch-on and the switch-off are controlled in accordance with only the attractive force or the repelling force acting between magnetic poles produced on each of two magnets which form the switch element, without the use of the internal stress of the arm of each of the contacts, and in which each the switched-on state and the switched-off state of the switch element is self-held by utilizing the residual flux density in a magnetic circuit including said pair of contacts.
Inventors
- 👤 Yukio Nakagome
- 👤 Hiroichi Teramura
- 👤 Yasuo Fukata
- 👤 Sumitoshi Ando
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:15
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/01; H01H51/28; H01H51/284; H01H51/285
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
233 words
A switch element, comprising: a first magnet made of a ferromagnetic material having a substantially rectangular hysteresis characteristic, and having at least three magnetic poles, a second magnet made of a magnetic material of low residual magnetic flux density and having two magnetic poles, means for movably supporting at least one of said two magnets so that each of said two magnetic poles of the second magnet can close to each of a pair of magnetic poles of different polarities selected from said at least three magnetic poles of the first magnet, a first control means for magnetizing the first magnet in either of two possible states, a second control means for magnetizing the second magnet in a predetermined state, and at least one pair of contact means for closing in response to movement of one said magnetic pole of one of the two magnets when the first magnet is magnetized by the first control means to a predetermined one of said two possible states, and for opening in response to the movement of said one magnetic pole of one of the two magnets when the first magnet is magnetized by the first control means to the other of said two possible states, said first magnet and the second magnet forming a substantially closed magnetic circuit in both the opened and closed conditions of said pair of contacts to self-hold the condition selected.
Claim 2
Dependent Claim
233 words
A switch element, comprising: a first magnet made of a ferromagnetic material having a substantially rectangular hysteresis characteristic, and having at least three magnetic poles, a second magnet made of a magnetic material of low residual magnetic flux density and having two magnetic poles, means for movably supporting at least one of said two magnets so that each of said two magnetic poles of the second magnet can close to each of a pair of magnetic poles of different polarities selected from said at least three magnetic poles of the first magnet, a first control means for magnetizing the first magnet in either of two possible states, a second control means for magnetizing the second magnet in a predetermined state, and at least one pair of contact means for closing in response to movement of one said magnetic pole of one of the two magnets when the first magnet is magnetized by the first control means to a predetermined one of said two possible states, and for opening in response to the movement of said one magnetic pole of one of the two magnets when the first magnet is magnetized by the first control means to the other of said two possible states, said first magnet and the second magnet forming a substantially closed magnetic circuit in both the opened and closed conditions of said pair of contacts to self-hold the condition selected.
Claim 3
Dependent Claim
55 words
A switch element according to claim 1, in which the first magnet comprises a U-shaped magnet having two legs, and having two magnetic poles of one polarity on one said leg and two magnetic poles of the other polarity on the other said leg, and in which the second magnet comprises a small bar magnet.
Claim 4
Dependent Claim
59 words
A switch element according to claim 1, in which the first magnet is a W-shaped conductive magnet having three legs each having a magnetic pole thereon, wherein two of said poles on said W-shaped magnet have the same polarity, and in which the second magnet is a U-shaped conductive magnet including two legs having magnet poles of different polarities.
Claim 5
Dependent Claim
25 words
A switch element according to claim 1, in which the second magnet is U-shaped and has two legs made of flexible, conductive and magnetic material.
Claim 6
Dependent Claim
232 words
A switch element, comprising: a first magnet made of a magnetic material of low residual magnetic flux density and having at least three magnetic poles, a second magnet made of a ferromagnetic material having a substantially rectangular hysteresis characteristic and having two magnetic poles, means for movably supporting at least one of said two magnets so that each of said two magnetic poles of the second magnet can close to each of a pair of magnetic poles of different polarities selected from said at least three magnetic poles of the first magnet, a first control means for magnetizing the second magnet in either of two possible states, a second coNtrol means for magnetizing the first magnet in a predetermined state, and at least one pair of contact means for closing in response to movement of one said magnetic pole of one of the two magnets when the second magnet is magnetized by the first control means to a predetermined one of said two possible states, and for opening in response to the movement of said one magnetic pole of one of the two magnets when the second magnet is magnetized by the first control means to the other of said two possible states, said first magnet and the second forming a substantially closed magnetic circuit in both the opened and closed conditions of said pair of contacts to self-hold the condition selected.
Claim 7
Dependent Claim
232 words
A switch element, comprising: a first magnet made of a magnetic material of low residual magnetic flux density and having at least three magnetic poles, a second magnet made of a ferromagnetic material having a substantially rectangular hysteresis characteristic and having two magnetic poles, means for movably supporting at least one of said two magnets so that each of said two magnetic poles of the second magnet can close to each of a pair of magnetic poles of different polarities selected from said at least three magnetic poles of the first magnet, a first control means for magnetizing the second magnet in either of two possible states, a second coNtrol means for magnetizing the first magnet in a predetermined state, and at least one pair of contact means for closing in response to movement of one said magnetic pole of one of the two magnets when the second magnet is magnetized by the first control means to a predetermined one of said two possible states, and for opening in response to the movement of said one magnetic pole of one of the two magnets when the second magnet is magnetized by the first control means to the other of said two possible states, said first magnet and the second forming a substantially closed magnetic circuit in both the opened and closed conditions of said pair of contacts to self-hold the condition selected.
Claim 8
Dependent Claim
55 words
A switch element according to claim 5, in which the first magnet is a U-shaped magnet having two legs, and having two magnetic poles of one polarity on one said leg and two magnetic poles of the other polarity on the other said leg, and in which the second magnet comprises a small bar magnet.
Claim 9
Dependent Claim
59 words
A switch element according to claim 5, in which the first magnet is a W-shaped conductive magnet having three legs each having a magnetic pole thereon, wherein two of said poles on said W-shaped magnet have the same polarity, and in which the second magnet is a U-shaped conductive magnet including two legs having magnetic poles of different polarities.
Claim 10
Dependent Claim
25 words
A switch element according to claim 5, in which the second magnet is U-shaped and has two legs made of flexible, conductive and magnetic material.
References Cited (Backward Citations)
US2337251A
Cited
US3295023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |