Patent US2413371A successfully refreshed from Google Patents.
US3756181A
Expired / Lapsed
US
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Torpedo separation sensing device
Assignee: United States Department of the Navy
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Filing: 1970-03-13
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Granted: 1973-09-04
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Expires: 1990-03-13
Abstract
Abstract A torpedo separation sensing device having a laser for providing optical pulses of energy which are transmitted both within the torpedo and out the torpedo. A first plurality of photodetectors provide a first electrical signal responsive to the optical signals transmitted within the torpedo. A second plurality of photodetectors provide a second electrical signal responsive to the reflection of the transmitted optical light out of the torpedo and reflected back inside the torpedo, for example, off the torpedo tube. Logic circuitry is provided to insure that an output signal occurs only upon occurrence of the first electrical signal and absence of the second electrical signal indicating physical separation of the torpedo and the torpedo tube.
Inventors
- 👤 E Beach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:57
CPC Classifications
F; F41; F41F; F41F3/00; F41F3/08; G; G01; G01S; G01S17/00; G01S17/88
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
105 words
A torpedo separation sensing device comprising means for providing a source of optical energy, means responsive to said source of optical energy for transmitting part of said optical energy within said torpedo and for transmitting part of said optical energy external to said torpedo, means for providing a first electrical signal responsive to said optical energy transmitted within said torpedo, means for providing a second electrical signal responsive to the reflection of said externally transmitted optical energy, and means for providing an electrical signal indicative of torpedo separation in the presence of said first electrical signal and in the absence of said second electrical signal.
Claim 2
Dependent Claim
105 words
A torpedo separation sensing device comprising means for providing a source of optical energy, means responsive to said source of optical energy for transmitting part of said optical energy within said torpedo and for transmitting part of said optical energy external to said torpedo, means for providing a first electrical signal responsive to said optical energy transmitted within said torpedo, means for providing a second electrical signal responsive to the reflection of said externally transmitted optical energy, and means for providing an electrical signal indicative of torpedo separation in the presence of said first electrical signal and in the absence of said second electrical signal.
Claim 3
Dependent Claim
26 words
A torpedo separation sensing device according to claim 1 wherein said means for providing a source of optical energy is a laser located within said torpedo.
Claim 4
Dependent Claim
37 words
A torpedo separation sensing device according to claim 1 wherein said means for transmitting part of said optical energy within said torpedo and for transmitting part of said optical energy external to said torpedo is a half-mirror.
Claim 5
Dependent Claim
57 words
A torPedo separation sensing device according to claim 1 wherein said means for providing a first electrical signal includes at least one photodetector for detecting said optical energy transmitted within said torpedo and for providing a signal responsive to said detection and further includes means for providing an electrical signal responsive to the modulation of said laser.
Claim 6
Dependent Claim
50 words
A torpedo separation sensing device according to claim 4 wherein said means for providing a first electrical signal further comprises means for providing said first electrical signal upon coincidence of said signal responsive to said detection in said photodetector and said electrical signal responsive to the modulation of said laser.
Claim 7
Dependent Claim
49 words
A torpedo separation sensing device according to claim 5 wherein said means for providing said first electrical signal further includes a plurality of photodetectors for detecting optical energy transmitted within said torpedo wherein said electrical signal responsive to said detection occurs only upon coincidence of detection of said photodetectors.
Claim 8
Dependent Claim
37 words
A torpedo separation sensing device according to claim 1 wherein said means for providing said second electrical signal includes at least one photodetector for detecting the reflection of said externally transmitted optical signal back in said torpedo.
Claim 9
Dependent Claim
34 words
A torpedo separation sensing device according to claim 7 wherein said means for providing said second electrical signal further includes means for providing said second electrical signal upon absence of detection by said photodetector.
Claim 10
Dependent Claim
69 words
A torpedo separation sensing device according to claim 1 wherein said means for providing a second electrical signal includes a plurality of photodetectors for detecting the reflection of said externally transmitted optical signal back in said torpedo and for providing an electrical output responsive to the detection of one of said photodetectors, and means for providing said second electrical signal upon absence of detection by any of said photodetectors.
References Cited (Backward Citations)
US3129424A
Cited
US3004506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |