US3847348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll computer
Assignee: United States Department of the Navy
•
Filing: 1973-11-14
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Granted: 1974-11-12
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Expires: 1993-11-14
Abstract
Abstract A ship mounted stabilizer roll tank is instrumented to generate signals indicative of the tank moment. The ship is also instrumented to generate signals indicative of its actual roll. The measured tank moment is weighted to yield a signal indicative of the difference between the actual stabilized roll and the estimated unstabilized roll.
Inventors
- 👤 J Russ
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:55
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/70
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
101 words
A device for determining the unstabilized roll of a ship equipped with a roll tank comprising: first means for developing a first electrical signal proportional to the difference between the unstabilized roll angle and the stabilized roll angle of the ship; second means for developing a second electrical signal proportional to the stabilized roll angle of the ship; third means for adding said first and second signals to produce a third electrical signal proportional to the unstabilized roll angle of the ship, whereby said third signal is indicative of the effectiveness of said roll tank when compared with said second signal.
Claim 2
Independent Claim
101 words
A device for determining the unstabilized roll of a ship equipped with a roll tank comprising: first means for developing a first electrical signal proportional to the difference between the unstabilized roll angle and the stabilized roll angle of the ship; second means for developing a second electrical signal proportional to the stabilized roll angle of the ship; third means for adding said first and second signals to produce a third electrical signal proportional to the unstabilized roll angle of the ship, whereby said third signal is indicative of the effectiveness of said roll tank when compared with said second signal.
Claim 3
Dependent Claim
30 words
The device according to claim 1 wherein: said first means includes a plurality of pressure sensors mounted at various locations on said roll tank for producing pressure representative electrical signals.
Claim 4
Dependent Claim
44 words
The device according to claim 2 wherein said first means includes a first adder (44) connected to said pressure sensors, said first adder including an output, whereby the signal at the output of said first adder is representative of the instantaneous roll tank moment.
Claim 5
Dependent Claim
61 words
The device according to claim 3 wherein said first means includes a second adder connected to the output of said first adder said second adder including a second output; first and second series connected integrators connected to said second output, each said integrator including an integrator output, whereby said first eleCtrical signal is present at said output of said second integrator.
Claim 6
Dependent Claim
24 words
The device of claim 4 wherein said first means includes feedback means connecting each said integrator output to an input of said second adder.
Claim 7
Dependent Claim
30 words
The device of claim 1 further including selectively actuable test means for supplying voltage signals to said first means whereby said first means may selectively be tested for proper operation.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |