Patent US3924465A successfully refreshed from Google Patents.
US3924465A
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Ship navigation equipment
Assignee: SEM SANDBERG SVERRE GEORGE
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Filing: 1974-04-04
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Granted: 1975-12-09
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Expires: 1994-04-04
Abstract
Abstract A method and apparatus for ship navigation information display system is disclosed including continuous sensing of at least two of the following parameters: the ship''s speed relative to the water, compass course, wind direction and speed and similar magnitudes of importance for sailing the ship. Signals corresponding to the measured parameters and a signal calculated from the speed signal and corresponding to the total distance travel, are converted into digital form and are fed into a number of temporary stores and selector circuits, from which dependent on the setting of manually operated switches, at least one of these signals for conversion to a signal suitable for display on a digital display, the conversion taking place digit by digit utilizing a time multiplex procedure under the control of a common display control circuit.
Inventors
- 👤 Sverre George Sem-Sandberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:59
CPC Classifications
G; G01; G01P; G01P5/00; G01P5/02; G01P5/06; G01P5/07; G01P13/00; G01P13/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
135 words
A shipboard navigational information system comprising a plurality of transducing means for sensing navigational parameters and creating an electrical signal dependant on the parameters, there being transducing means to sense at least wind velocity, wind direction and water velocity relative to the ship, a calculation unit connected to each of said transducing means to convert the output of the transducing means to a digital signal, at least two selector circuits each receiving input from two of the calculation units and each selecting and storing the output of one of the calculation units, at least one display circuit receiving input from the selector circuits, and display control circuit means using time multiplexing to control the operation of the display circuits and the selector circuits to display information corresponding to the navigational parameter selected by the operator.
Claim 2
Dependent Claim
135 words
A shipboard navigational information system comprising a plurality of transducing means for sensing navigational parameters and creating an electrical signal dependant on the parameters, there being transducing means to sense at least wind velocity, wind direction and water velocity relative to the ship, a calculation unit connected to each of said transducing means to convert the output of the transducing means to a digital signal, at least two selector circuits each receiving input from two of the calculation units and each selecting and storing the output of one of the calculation units, at least one display circuit receiving input from the selector circuits, and display control circuit means using time multiplexing to control the operation of the display circuits and the selector circuits to display information corresponding to the navigational parameter selected by the operator.
Claim 3
Dependent Claim
38 words
A shipboard navigational inforMation system as claimed in claim 1 wherein a plurality of manually operable switches are connected to the selector circuits for the outputs of which calculation units are selected and stored by the selector circuits.
Claim 4
Dependent Claim
66 words
A shipboard navigational information system as claimed in claim 1 wherein there is an operator preselectable limit set means and a supervisory watch circuit associated with one of said calculation circuits and there is an alarm connected to the supervisory watch circuit so that if the preselected limit on the limit set means is exceeded by the signal in the calculation circuit, the alarm is actuated.
Claim 5
Dependent Claim
39 words
A shipboard navigational information system as claimed in claim 1, wherein there is a clockpulse source, and also a distance calculation circuit receiving input from the clockpulse source and the tranducing means sensing water velocity to calculate distance information.
Claim 6
Dependent Claim
21 words
A shipboard navigational information system as claimed in claim 1 wherein there are transducing means for sensing compass and bearing information.
Claim 7
Dependent Claim
66 words
A shipboard navigational information system as claimed in claim 1 wherein the combined transducing means for sensing wind direction and wind velocity includes a shaft, a pair of independently rotatable bodies on said shaft, an electric pulse generator on each of said bodies and means secured to said shaft for causing the pulse generators to create electric pulses as said shaft rotates relative to said bodies.
Claim 8
Dependent Claim
40 words
A shipboard navigational information system as claimed in claim 6 wherein one of said bodies is rigidly attached to a wind vane, one of said bodies is rigidly secured to a supporting mounting and the shaft carries anemometer cups thereon.
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) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |