Patent US4166932A successfully refreshed from Google Patents.
US4166932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical microphone with rectangular fiber optics
Assignee: International Standard Electric Corp
•
Filing: 1978-08-25
•
Granted: 1979-09-04
•
Expires: 1998-08-25
Abstract
Abstract An acousto-optic transducer which may be employed in a telephone subscriber instrument is described in which movement of a diaphragm varies the degree of coupling between the ends of two rectangular optical fibers having rectangular cross sections and which are coupled to the diaphragm for linearly amplitude modulating light signals passing between the fiber ends.
Inventors
- 👤 Peter R. Selway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:27
CPC Classifications
H; H04; H04R; H04R23/00; H04R23/008
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
96 words
A fiber optic transducer comprising: a housing means; flexible diaphram means supported on said housing; a first optical fiber having a rectangular cross section, one end of said first optical fiber being secured to said diaphragm; a second optical fiber, having a rectangular cross section being secured to said housing, said secured ends of said first and second optical fibers being positioned to provide optical coupling therebetween, such that movement of said diaphragm causes corresponding variations in the degree of coupling between said fiber ends for linearly amplitude modulating light signals passing between said fiber ends.
Claim 2
Dependent Claim
96 words
A fiber optic transducer comprising: a housing means; flexible diaphram means supported on said housing; a first optical fiber having a rectangular cross section, one end of said first optical fiber being secured to said diaphragm; a second optical fiber, having a rectangular cross section being secured to said housing, said secured ends of said first and second optical fibers being positioned to provide optical coupling therebetween, such that movement of said diaphragm causes corresponding variations in the degree of coupling between said fiber ends for linearly amplitude modulating light signals passing between said fiber ends.
Claim 3
Dependent Claim
19 words
A transducer arrangement as claimed in claim 1 wherein both of said optical fibers are of the ribbon type.
Claim 4
Dependent Claim
42 words
A transducer arrangement as claimed in claim 1 wherein said first and second fibers are arranged such that, when said diaphram is in its undisturbed position, said fiber ends are separated from one another by half of the thickness of said fibers.
Claim 5
Dependent Claim
101 words
In a telephone subscriber instrument, an acousto-optical transducer arrangement comprising: a housing means; flexible diaphragm means supported on said housing; a first optical fiber having a rectangular cross section, one end of said first optical fiber being secured to said diaphragm; a second optical fiber, having a rectangular cross section being secured to said housing, said secured ends of said first and second optical fibers being positioned to provide optical coupling therebetween, such that movement of said diaphragm causes corresponding variations in the degree of coupling between said fiber ends for linearly amplitude modulating light signals passing between said fiber ends.
Claim 6
Dependent Claim
101 words
In a telephone subscriber instrument, an acousto-optical transducer arrangement comprising: a housing means; flexible diaphragm means supported on said housing; a first optical fiber having a rectangular cross section, one end of said first optical fiber being secured to said diaphragm; a second optical fiber, having a rectangular cross section being secured to said housing, said secured ends of said first and second optical fibers being positioned to provide optical coupling therebetween, such that movement of said diaphragm causes corresponding variations in the degree of coupling between said fiber ends for linearly amplitude modulating light signals passing between said fiber ends.
Claim 7
Dependent Claim
19 words
A transducer arrangement as claimed in claim 4 wherein both of said optical fibers are of the ribbon type.
Claim 8
Dependent Claim
42 words
A transducer arrangement as claimed in claim 4 wherein said first and second fibers are arranged such that, when said diaphragm is in its undisturbed position, said fiber ends are separated from one another by half of the thickness of said fibers.
References Cited (Backward Citations)
US3818369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-09-03 | 1983-03-05 | 1983-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-03 | 1987-03-05 | 1987-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-03 | 1991-03-05 | 1991-09-04 | $7700.00 | Window Closed / Lapsed |