US3637996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Navigational distance computer
Assignee: Prototypes Inc
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Filing: 1969-10-20
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Granted: 1972-01-25
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Expires: 1989-10-20
Abstract
Abstract A manually presettable speed, continuously indicating, computed distance navigational computer for vessels comprising an electrical preset speed display meter, an electromechanical digital computed mileage indicator, a pulse generator for operating the mileage indicator to provide a continuous digital display of computed distance travelled at a preset rate with the passage of time and a manually adjustable electrical resistor common to the pulse generator and meter for establishing the pulse generator frequency and operating the meter to display the estimated preset speed needed to product the computed distance travelled with time at said preset speed for setting a desired speed into the computer. Actual speed through the water may also be displayed on the meter.
Inventors
- 👤 Malcolm Seymour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:06
CPC Classifications
G; G01; G01P; G01P5/00; G01P5/02; G01P5/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
173 words
A manually presettable, continuously indicating, computed distance computer for computing distance from an estimated speed comprising presettable speed display means including an electrical meter having a dial with speed indicia thereon for establishing a desired estimated speed computed distance display means including a digital distance indicator responsive to an electric pulse to display a digital distance increment thereon a source of electric power pulse generator means connected to said source and said distance display means producing a train of electric output pulses at a presettable frequency for operating said distance display means to provide a continuous digital display of computed distance travelled at a preset estimated speed with the passage of time manually presettable adjustment means including continuously variable electrical resistance means connected to said source and common to said pulse generator means and said electrical meter, said electrical resistance means being adjusted by operating said meter to display a desired estimated speed to establish said predetermined pulse frequency and continuously produce said computed distance travelled with time on said distance display means.
Claim 2
Dependent Claim
173 words
A manually presettable, continuously indicating, computed distance computer for computing distance from an estimated speed comprising presettable speed display means including an electrical meter having a dial with speed indicia thereon for establishing a desired estimated speed computed distance display means including a digital distance indicator responsive to an electric pulse to display a digital distance increment thereon a source of electric power pulse generator means connected to said source and said distance display means producing a train of electric output pulses at a presettable frequency for operating said distance display means to provide a continuous digital display of computed distance travelled at a preset estimated speed with the passage of time manually presettable adjustment means including continuously variable electrical resistance means connected to said source and common to said pulse generator means and said electrical meter, said electrical resistance means being adjusted by operating said meter to display a desired estimated speed to establish said predetermined pulse frequency and continuously produce said computed distance travelled with time on said distance display means.
Claim 3
Dependent Claim
41 words
A manually presettable computer as claimed in claim 1, further including electrical strain gage actual speed-sensing means connected to said source and said electrical meter displaying an actual speed by said speed indicia for aiding in setting said desired estimated speed.
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |