Patent US3673553A successfully refreshed from Google Patents.
US3673553A
Expired / Lapsed
US
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Measuring instrument for piloting ship for docking or leaving
Assignee: Tokyo Keiki Inc
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Filing: 1970-06-08
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Granted: 1972-06-27
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Expires: 1990-06-08
Abstract
Abstract A measuring instrument for piloting a ship for docking or leaving a pier having at least two spaced ultrasonic transducer means provided under water on the side of the pier for transmitting ultrasonic beams substantially perpendicular to the mooring line joining the front surfaces of dolphins, measuring means respectively corresponding to the ultrasonic transducer means, means for measuring the distance between the ship and the pier and the speed of the ship, and means for reporting the measured results to a pilot on the ship.
Inventors
- 👤 Takahiro Miura
- 👤 Miaki Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:50
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/02; G01S15/50; G01S15/58; G01S15/582; G01S13/00; G01S13/88; G01S13/91; G01S13/913; G01S15/06; G01S15/08; G01S15/10; G01S15/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
83 words
A measuring instrument for piloting a ship for docking or leaving comprising at least two spaced ultrasonic transducer means respectively provided under water on the side of a pier for transmitting ultrasonic beams substantially perpendicular to the mooring line joining front surfaces of dolphins, measuring means respectively corresponding to the ultrasonic transducer means, means for measuring the distance between the ship and the pier and the speed of the ship, and means for reporting the measured values to a pilot on the ship.
Claim 2
Dependent Claim
83 words
A measuring instrument for piloting a ship for docking or leaving comprising at least two spaced ultrasonic transducer means respectively provided under water on the side of a pier for transmitting ultrasonic beams substantially perpendicular to the mooring line joining front surfaces of dolphins, measuring means respectively corresponding to the ultrasonic transducer means, means for measuring the distance between the ship and the pier and the speed of the ship, and means for reporting the measured values to a pilot on the ship.
Claim 3
Dependent Claim
76 words
A measuring instrument for piloting a ship for docking or leaving as claimed in claim 1 wherein the front end of each of the ultrasonic transducer means stands back from the front edge of the pier so that the time required for a ultrasonic pulse transmitted from the transducer means to travel back and forth between the front end of the transducer means and the front edge of the pier is greater than the pulse width.
Claim 4
Dependent Claim
87 words
A measuring instrument for piloting a ship for docking or leaving as claimed in claim 1 wherein each of the measuring means includes a first pulse generator for driving each of the transducer means, a receiving unit for receiving a signal from the transducer means, a second pulse generator, and a gate circuit which is opened by the output of the first pulse generator and closed by the output of the receiving unit and permits the passage therethrough of a pulse derived from the second pulse generator.
Claim 5
Dependent Claim
46 words
A measuring instrument for piloting a ship for docking or leaving as claimed in claim 3 which includes two counter means, memory means for temporally memorizing the outputs of the two counter means respectively and indicator means for indicating the outputs of the memory means respectively.
References Cited (Backward Citations)
US2629082A
Cited
US2972731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |