US3660846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic collision warning system
Assignee: Individual
•
Filing: 1969-10-23
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Granted: 1972-05-02
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Expires: 1989-10-23
Abstract
Abstract A simplified collision warning system particularly applicable for ships and automatically producing an alarm signal upon the persistence of an object within a predeterminable range. The video output of conventional radar is employed with a variable range gate and counter to actuate an alarm when a target return signal remains within a set gate range for a preset number of radar sweeps.
Inventors
- 👤 Lawrence F Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:41
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/88; G01S13/93; G01S13/937
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
90 words
An automatic warning system for use with a radar receiver having a video signal comprising, a variable range gate circuit adapted to receive said video signal, said gate including adjusting means for setting the gate to pass only signals from a range less than an adjustable maximum, a counter connected to the output of said gate for counting signals therefrom and producing an output signal upon counting to a predetermined minimum number, and an alarm unit connected to said counter and producing an alarm upon receipt of a signal therefrom.
Claim 2
Dependent Claim
90 words
An automatic warning system for use with a radar receiver having a video signal comprising, a variable range gate circuit adapted to receive said video signal, said gate including adjusting means for setting the gate to pass only signals from a range less than an adjustable maximum, a counter connected to the output of said gate for counting signals therefrom and producing an output signal upon counting to a predetermined minimum number, and an alarm unit connected to said counter and producing an alarm upon receipt of a signal therefrom.
Claim 3
Dependent Claim
28 words
The warning system of claim 1 further defined by means adjusting said counter to establish the number of input signals within a predetermined period producing an output signal.
Claim 4
Dependent Claim
18 words
The system of claim 1 further defined by means deactivating said system whEreby no audio alarm is produced.
Claim 5
Dependent Claim
35 words
The system of claim 1 further defined by said variable range gate having a zero range on said adjusting means whereby said system may be rendered inoperable under conditions wherein collision warning is not desired.
Claim 6
Dependent Claim
73 words
The system of claim 1 further defined by said variable range gate producing an output pulse for each radar receiver signal occurring within said adjustable range for each 360* radar sweep, and said counter operating upon said gate pulses to produce an output signal upon receipt of predetermined number of gate signals regardless of the likelihood of collision with radar targets whereby said alarm thereupon operates to require alarm deactivation or other action.
Claim 7
Dependent Claim
82 words
The system of claim 1 further defined by a second range gate circuit connected to receive said video signal and having a substantially shorter range setting than said first range gate circuit, a second counter connected to the output of said second range gate and producing an output signal upon receipt of a predetermined number of gate signals, an alarm actuator receiving the output of both of said counters to produce an actuating signal for application to a high volume audio alarm.
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |