US3721981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse radar ranging
Assignee: MINI OF AVIAT SUPPLY
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Filing: 1970-11-17
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Granted: 1973-03-20
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Expires: 1990-11-17
Abstract
Abstract A radar ranging system for calculating the time interval between transmitted and received pulses or vice versa by means of a pulse generator, means for causing the transmitter to transmit a pulse at a time which is random compared with the pulse generator output, means for admitting pulses from the pulse generator to a counter for a plurality m of time intervals and means for dividing the output of the counter by m.
Inventors
- 👤 R Allard
- 👤 J Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:07
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/14; G01S13/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
221 words
A pulse radar ranging system including means for generating a sequence of pulses regular in time, means for generating a set of first pulses each so timed relative to a radar transmitted pulse that either it is contemporaneous with the radar transmitted pulse or separated therefrom by a number of pulses in the sequence of pulses representing the maximum range to be measured and whose timing is random compared with the sequence of pulses, means for generating a set of second pulses each contemporaneous with a radar received pulse, whereby an interpulse period of a first kind is defined as that period which starts with a first pulse contemporaneous with a radar transmitted pulse and ends with the next occurring second pulse and an interpulse period of a second kind is defined as that period which starts with a second pulse and ends with the next occurring first pulse representing maximum range, counting means, means for allowing the sequence of pulses to be applied to the counting means for the duration of a plurality of interpulse periods of the same kind as each other, and means for extracting from the counting means the count registered in the counting means divided by the number of interpulse periods for the duration of which the sequence of pulses was applied to the counting means.
Claim 2
Dependent Claim
221 words
A pulse radar ranging system including means for generating a sequence of pulses regular in time, means for generating a set of first pulses each so timed relative to a radar transmitted pulse that either it is contemporaneous with the radar transmitted pulse or separated therefrom by a number of pulses in the sequence of pulses representing the maximum range to be measured and whose timing is random compared with the sequence of pulses, means for generating a set of second pulses each contemporaneous with a radar received pulse, whereby an interpulse period of a first kind is defined as that period which starts with a first pulse contemporaneous with a radar transmitted pulse and ends with the next occurring second pulse and an interpulse period of a second kind is defined as that period which starts with a second pulse and ends with the next occurring first pulse representing maximum range, counting means, means for allowing the sequence of pulses to be applied to the counting means for the duration of a plurality of interpulse periods of the same kind as each other, and means for extracting from the counting means the count registered in the counting means divided by the number of interpulse periods for the duration of which the sequence of pulses was applied to the counting means.
Claim 3
Dependent Claim
50 words
A pulse radar ranging system as claimed in claim 1 in which the sequence of pulses is applied to the counting means for a plurality of interpulse periods of the first kind, and means for resetting the counting means to zero at the commencement of the plurality of interpulse periods.
Claim 4
Dependent Claim
77 words
A pulse radar ranging system as claimed in claim 1 in which the sequence of pulses is applied to the counting means for a plurality of interpulse periods of the second kind, means for resetting the counting means to its maximum count at the commencement of the plurality of interpulse periods, and means for controlling the counting means in such a way that each pulse applied to it subtracts from the count registered in the counting means.
Claim 5
Dependent Claim
56 words
A pulse radar ranging system as claimed in claim 1 and further including data processing means, and means for applying to the data processing means signals representing the count registered in the counting means divided by the number of interpulse periods for the duration of which the sequence of pulses was applied to the counting means.
Claim 6
Dependent Claim
56 words
A pulse radar ranging system as claimed in claim 2 and further including data processing means and means for applying to the data processing means signals representing the count registered in the counting means divided by the number of interpulse periods for the duration of which the sequence of pulses was applied to the counting means.
Claim 7
Dependent Claim
56 words
A pulse radar ranging system as claimed in claim 3 and further including data processing means and means for applying to the data processing means signals representing the count registered in the counting means divided by the number of interpulse periods for the duration of which the sequence of pulses was applied to the counting means.
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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |