US3569966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time compression of radar video
Assignee: Individual
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Filing: 1969-06-03
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Granted: 1971-03-09
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Expires: 1989-06-03
Abstract
Abstract A system for achieving radar video sweep time reduction in order to provide more time to write alphanumerics on a radar PPI display. The system utilizes analogue or digital techniques for the time compression which is accomplished by storing the radar video and subsequently reading out the stored information for display. When less time is utilized for reading out the information than the time required to store the information, time compression of the radar video occurs.
Inventors
- 👤 William J Dunn
- 👤 Edward M Sawtelle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:21
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/2806
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
93 words
A radar video time compression system for use with a radar system providing radar video signals wherein the time to display the radar video signals increases with increasing range, comprising: a. means responsive to radar video signals for storing representations thereof; and b. means for reading out said stored representations from storage in a predetermined constant time period which is independent of the time required to store said representations, said predetermined constant time period being less than the period of time required to store said representations at maximum range of the radar system.
Claim 2
Dependent Claim
93 words
A radar video time compression system for use with a radar system providing radar video signals wherein the time to display the radar video signals increases with increasing range, comprising: a. means responsive to radar video signals for storing representations thereof; and b. means for reading out said stored representations from storage in a predetermined constant time period which is independent of the time required to store said representations, said predetermined constant time period being less than the period of time required to store said representations at maximum range of the radar system.
Claim 3
Dependent Claim
82 words
The system as defined in claim 1 and further comprising: a. a first cathode ray tube responsive to said radar video signals for displaying said signals; b. a vidicon camera for storing representations of said displayed signals and for reading out said representations from storage in said predetermined period at desired intervals; and c. a second cathode ray tube responsive to said representations read out from said storage for displaying said representations in the same time period as said predetermined time period.
Claim 4
Dependent Claim
26 words
The system as defined in claim 2 wherein said first cathode ray tube is arranged to display said radar video signals along a single axis thereof.
Claim 5
Dependent Claim
43 words
A system as defined in claim 1 wherein said storage means stores representations of radar signals at different ranges in dIfferent storage times and said readout means reads out said representations corresponding to different ranges from said storage in the same time period.
Claim 6
Dependent Claim
27 words
The system as defined in claim 1 wherein said means responsive to radar video signals provides digital representations thereof and said storage means is a digital memory.
Claim 7
Dependent Claim
50 words
The system as defined in claim 5 wherein said means responsive to radar video signals comprises: a. means for sampling and integrating radar video signals to provide an average level output signal; and b. means for converting said average level signal in analog form to a digital code representation thereof.
Claim 8
Dependent Claim
75 words
The system as defined in claim 6 and further comprising: a. a radar processing memory for storing said digital code representations; and b. means responsive to said digital code representations from said converter means at a predetermined portion of a sweep and at a predetermined range and to a corresponding digital code representation from said processing memory for combining said digital code representations to provide a sweep to sweep integration for updating said processing memory.
Claim 9
Dependent Claim
70 words
The system as defined in claim 7 wherein said digital code representations are in binary form and said combining means includes means responsive to said binary code from said memory for shifting said binary code one bit to the right and for combining said shifted binary code to said binary code from said converter means to form a resultant binary code which is fed to said processing memory for storage.
Claim 10
Dependent Claim
37 words
The system as defined in claim 7 and further comprising: a. a display memory; and b. means responsive to the radar trigger for transferring said stored digital code representations from said processing memory to said display memory.
Claim 11
Dependent Claim
57 words
The system as defined in claim 9 and further comprising display means coupled to said display memory, said display means including range clock means for reading out said digital code representations from said display memory in a predetermined time period and digital to analog converter means for converting said digital code representations into analog form for display.
Claim 12
Dependent Claim
77 words
The system as defined in claim 10 wherein said display means further includes a plurality of display scopes, each of said scopes having an associated digital to analog converter and a range clock for displaying radar video for a predetermined range and selector means coupled to said display memory and said display means for coupling the digital code representations for a selected range to the appropriate digital to analog converter and display scope for the selected range.
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |