Patent US4239012A successfully refreshed from Google Patents.
US4239012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homing torpedo control apparatus
Assignee: United States Department of the Navy
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Filing: 1960-12-15
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Granted: 1980-12-16
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Expires: 1980-12-15
Abstract
Abstract 2. In an echo-ranging torpedo wherein spurious and true-target echo signalsay be received in the listening periods between repetitive search-pulse transmission instants, in combination: a receiver operative to convert received echo signals to steering command signals having characteristics corresponding to echo-source direction, said receiver including a target-recognition circuit and a gating relay which operates, with inherent delay, in response to recognition of each true-target echo signal; a steering control circuit, including steering relay and switch means, adapted to place said steering relay and switch means in a condition corresponding to echo-source direction as derived by said steering control circuit, when operative, from said steering command signals; means applying said steering command signals to said steering control circuit; means controlled by operation of said gating relay, in response to each reception and recognition of a true-target echo signal, to render said steering control circuit operative to respond to steering command signals stemming from subsequent echo signals during a predetermined interval, of the order of a few listening periods, following each said reception and recognition of a true-target echo signal, and steering apparatus responsive, when rendered effective, to said steering relay and switch means condition; said gating relay, when operated, controlling said steering apparatus to render it effective to respond to said steering relay and switch means condition.
Inventors
- 👤 Stephen Kowalyshyn
- 👤 John C. Voorhees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:27
CPC Classifications
F; F41; F41G; F41G7/00; F41G7/20; F41G7/22; F41G7/2273; F41G7/228
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
202 words
In an underwater-target direction-finding apparatus of echo-ranging type wherein spurious and true-target echo signals may be received in the listening periods between repetitive search-pulse transmission instants, in combination: a receiver operative to convert received echo signals to command signals having characteristics corresponding to echo-source direction, said receiver including a target-recognition circuit and a gating relay operating, with inherent delay, in response to recognition of each true-target echo signal; a control circuit, including control switch means, adapted to place said control switch means in a condition corresponding to echo-source direction as derived by said control circuit, when operative, from said command signals; means applying said command signals to said control circuit; means controlled by operation of said gating relay, in response to each reception and recognition of a true-target echo signal, to render said control circuit operative to respond to command signals stemming from subsequent echo signals during a predetermined interval, of the order of a few listening periods, following each said reception and recognition of a true-target echo signal; echo-source direction utilization means responsive, when operative, to said control switch means condition; and said gating relay controlling said utilization means to render it operative only upon recognition of a true-target echo signal.
Claim 2
Dependent Claim
202 words
In an underwater-target direction-finding apparatus of echo-ranging type wherein spurious and true-target echo signals may be received in the listening periods between repetitive search-pulse transmission instants, in combination: a receiver operative to convert received echo signals to command signals having characteristics corresponding to echo-source direction, said receiver including a target-recognition circuit and a gating relay operating, with inherent delay, in response to recognition of each true-target echo signal; a control circuit, including control switch means, adapted to place said control switch means in a condition corresponding to echo-source direction as derived by said control circuit, when operative, from said command signals; means applying said command signals to said control circuit; means controlled by operation of said gating relay, in response to each reception and recognition of a true-target echo signal, to render said control circuit operative to respond to command signals stemming from subsequent echo signals during a predetermined interval, of the order of a few listening periods, following each said reception and recognition of a true-target echo signal; echo-source direction utilization means responsive, when operative, to said control switch means condition; and said gating relay controlling said utilization means to render it operative only upon recognition of a true-target echo signal.
Claim 3
Dependent Claim
216 words
In an echo-ranging torpedo wherein spurious and true-target echo signals may be received in the listening periods between repetitive search-pulse transmission instants, in combination: a receiver operative to convert received echo signals to steering command signals having characteristics corresponding to echo-source direction, said receiver including a target-recognition circuit and a gating relay which operates, with inherent delay, in response to recognition of each true-target echo signal; a steering control circuit, including steering relay and switch means, adapted to place said steering relay and switch means in a condition corresponding to echo-source direction as derived by said steering control circuit, when operative, from said steering command signals; means applying said steering command signals to said steering control circuit; means controlled by operation of said gating relay, in response to each reception and recognition of a true-target echo signal, to render said steering control circuit operative to respond to steering command signals stemming from subsequent echo signals during a predetermined interval, of the order of a few listening periods, following each said reception and recognition of a true-target echo signal, and steering apparatus responsive, when rendered effective, to said steering relay and switch means condition; said gating relay, when operated, controlling said steering apparatus to render it effective to respond to said steering relay and switch means condition.
Claim 4
Dependent Claim
216 words
In an echo-ranging torpedo wherein spurious and true-target echo signals may be received in the listening periods between repetitive search-pulse transmission instants, in combination: a receiver operative to convert received echo signals to steering command signals having characteristics corresponding to echo-source direction, said receiver including a target-recognition circuit and a gating relay which operates, with inherent delay, in response to recognition of each true-target echo signal; a steering control circuit, including steering relay and switch means, adapted to place said steering relay and switch means in a condition corresponding to echo-source direction as derived by said steering control circuit, when operative, from said steering command signals; means applying said steering command signals to said steering control circuit; means controlled by operation of said gating relay, in response to each reception and recognition of a true-target echo signal, to render said steering control circuit operative to respond to steering command signals stemming from subsequent echo signals during a predetermined interval, of the order of a few listening periods, following each said reception and recognition of a true-target echo signal, and steering apparatus responsive, when rendered effective, to said steering relay and switch means condition; said gating relay, when operated, controlling said steering apparatus to render it effective to respond to said steering relay and switch means condition.
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) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |