US4705348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical switch
Assignee: Alps Alpine Co Ltd
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Filing: 1984-03-08
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Granted: 1987-11-10
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Expires: 2004-03-08
Abstract
Abstract An optical switch comprising an optical fiber member having its light sending end surface and light receiving surface bound closely in contact along a flat side of their ends, and a reflecting surface which is provided at the end surface of a swinging lever for switching ON and OFF the light reflecting condition where the light sent from the sending end surface is guided or not guided to the receiving end surface.
Inventors
- 👤 Hiroshi Matsunaga
- 👤 Ichiro Tokunaga
- 👤 Yoji Shimojima
- 👤 Kosei Obata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:59
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/26; G02B6/35; G02B6/3564; G02B6/3566; G02B6/351; G02B6/3512; G02B6/352; G02B6/354; G02B6/3544; G02B6/3548; G02B6/3552; G02B6/3568; G02B6/3574; G02B6/3582
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
188 words
An optical switch comprising: an optical fiber member having a light sending fiber and a light receiving fiber whose ends are arranged close together; a reflecting surface movable to a position adjacent said ends of said fiber for reflecting light from the light sending fiber end to the light receiving fiber end in an ON state of the switch and to a position wherein it does not reflect light from the light sending fiber end to the light receiving fiber end in an OFF state of the switch; and a lever, which is pivotable about a fulcrum at an intermediate position thereof, having an elongated length and said reflecting surface provided at one end thereof on an edge perpendicular to its elongated length arranged in opposing relation to said optical fiber member, and switch actuating means at the other end thereof for pivoting said other end of said lever such that said reflecting surface on said one end is moved between said ON and OFF states, wherein the distance from said actuating means to said fulcrum is shorter than the distance from said fulcrum to said reflecting surface.
Claim 2
Dependent Claim
188 words
An optical switch comprising: an optical fiber member having a light sending fiber and a light receiving fiber whose ends are arranged close together; a reflecting surface movable to a position adjacent said ends of said fiber for reflecting light from the light sending fiber end to the light receiving fiber end in an ON state of the switch and to a position wherein it does not reflect light from the light sending fiber end to the light receiving fiber end in an OFF state of the switch; and a lever, which is pivotable about a fulcrum at an intermediate position thereof, having an elongated length and said reflecting surface provided at one end thereof on an edge perpendicular to its elongated length arranged in opposing relation to said optical fiber member, and switch actuating means at the other end thereof for pivoting said other end of said lever such that said reflecting surface on said one end is moved between said ON and OFF states, wherein the distance from said actuating means to said fulcrum is shorter than the distance from said fulcrum to said reflecting surface.
Claim 3
Dependent Claim
40 words
An optical switch according to claim 1, wherein said ends of said optical fibers have a flat side and are closely arranged together along said flat side to increase the difference in output values between said ON and OFF states.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-09 | 1991-05-11 | 1991-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-09 | 1995-05-11 | 1995-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-09 | 1999-05-11 | 1999-11-10 | $7700.00 | Window Closed / Lapsed |