Patent US3099505A successfully refreshed from Google Patents.
Patent US4013342A successfully refreshed from Google Patents.
US4013342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keyboard using optical switching
Assignee: Individual
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Filing: 1975-12-19
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Granted: 1977-03-22
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Expires: 1995-12-19
Abstract
Abstract The invention relates to keyboard devices using optical switching and includes novel light distribution means to multiple fiber optics, switching means between fiber optics, and collection means from multiple fiber optics to a single point.
Inventors
- 👤 Leo H. Narodny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:27
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/94; H03K17/965; H03K17/968; H03K17/969
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
172 words
A system for coupling light transmitted in a first optical fiber bundle to a second optical fiber bundle comprising, a. a reflecting surface having a semi-ellipsoidal cavity, the major axis of said ellipsoid being in the plane of the open end of the reflecting surface, b. said first and second fiber bundles located at the foci of said semi-ellipsoidal reflecting surface when in a light coupling position, c. the ends of said first and second fiber bundles pointing toward said semi-ellipsoidal reflecting surface, d. said semi-ellipsoidal reflecting surface and said pair of fiber bundles movable relative to one another to displace one of said bundles from the location of the foci of the semi-ellipsoidal reflecting surface so that cutoff of light is accomplished, whereby light is coupled from said first fiber bundle to said second fiber bundle when the ends of the fiber bundles are located at the foci of said semi-ellipsoidal reflecting surface and light transmitted in said first fiber bundle is not so coupled when said elements are relatively displaced.
Claim 2
Independent Claim
172 words
A system for coupling light transmitted in a first optical fiber bundle to a second optical fiber bundle comprising, a. a reflecting surface having a semi-ellipsoidal cavity, the major axis of said ellipsoid being in the plane of the open end of the reflecting surface, b. said first and second fiber bundles located at the foci of said semi-ellipsoidal reflecting surface when in a light coupling position, c. the ends of said first and second fiber bundles pointing toward said semi-ellipsoidal reflecting surface, d. said semi-ellipsoidal reflecting surface and said pair of fiber bundles movable relative to one another to displace one of said bundles from the location of the foci of the semi-ellipsoidal reflecting surface so that cutoff of light is accomplished, whereby light is coupled from said first fiber bundle to said second fiber bundle when the ends of the fiber bundles are located at the foci of said semi-ellipsoidal reflecting surface and light transmitted in said first fiber bundle is not so coupled when said elements are relatively displaced.
Claim 3
Dependent Claim
18 words
The coupling system of claim 1 in which the reflecting surface moves and the fiber bundles are stationary.
Claim 4
Dependent Claim
13 words
The coupling system of claim 2 in which the reflecting surface moves laterally.
Claim 5
Dependent Claim
15 words
The coupling system of claim 2 in which the reflecting surface rotates around a pivot.
Claim 6
Dependent Claim
18 words
The coupling system of claim 2 in which a fiber bundle moves and the reflecting surface is stationary.
Claim 7
Dependent Claim
22 words
The coupling system of claim 2 in which a mask is interposed between the reflecting surface and one of said fiber bundles.
Claim 8
Dependent Claim
17 words
The coupling system of claim 2 in which the reflector is a channel with an elliptical concavity.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |