Patent US630468A successfully refreshed from Google Patents.
Patent US3213449A successfully refreshed from Google Patents.
US3213449A
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Distance measuring system
Assignee: Anritsu Electronic Works Ltd
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Filing: 1963-12-16
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Granted: 1965-10-19
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Expires: 1983-12-16
Abstract
No abstract record available.
Inventors
- 👤 Kobayashi Kyoji
- 👤 Enomoto Takashi
- 👤 Nojima Susumu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:53
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/82; G01S13/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
269 words
A SYSTEM OF MEASURING DISTANCE OF THE TYPE WHEREIN A CARRIER WAVE MODULATED BY A SIGNAL OF A MEASURING FREQUENCY IS TRANSMITTED FROM A MASTER STATION POSITIONED AT A FIRST POINT TO A SLAVE STATION POSITIONED AT A SECOND POINT AND THE TRANSMITTED WAVE IS REFLECTED AT THE SECOND POINT, SAID SYSTEM COMPRISING, IN COMBINATION, A FIRST TRANSMITTING MEANS TO TRANSMIT FROM SAID MASTER STATION TO SAID SLAVE STATION A FIRST CARRIER WAVE MODULATED BY A SIGNAL OF A FIRST MEASURING FREQUENCY AND A SIGNAL OF A REFERENCE FREQUENCY; FIRST RECEIVING MEANS AT SAID SLAVE STATION TO RECEIVE SAID MODULATED FIRST CARRIER WAVE TRANSMITTED FROM SAID MASTER STATION; A SECOND TRANSMITTING MEANS AT SAID SLAVE STATION, TO TRANSMIT FROM SAID SLAVE STATION A SECOND CARRIER WAVE MODULATED BY A SIGNAL OF A SECOND MEASURING FREQUENCY, A FIRST MIXER DETECTOR AT SAID SLAVE STATION TO DETECT SID MODULATED SECOND CARRIER WAVE TOGETHER WITH SAID MODULATED FIRST CARRIER WAVE TO DERIVE THEREFROM A FIRST DIFFERENCE SIGNAL SIMULTANEOUSLY WITH THE DETECTION OF SAID REFERENCE FREQUENCY SIGNAL; MEANS TO CONTROL THE SIGNAL OF SECOND MEASURING FREQUENCY SO AS TO MAINTAIN THE PHASE RELATION BETWEEN SAID FIRST DIFFERENCE SIGNAL AND SAID REFERENCE FREQUENCY SIGNAL AT A PREDETERMINED VALUE, A SECONE RECEIVING MEANS IN SAID MASTER STATION TO RECEIVE SAID SECOND MODULATED CARRIER WAVE TRANSMITTED FROM SAID SLAVE STATION, A SECOND MIXER DETECTOR IN SAID MASTER STATIO TO DETECT SID FIRST MODULATED CARRIER WAVE TOGETHER WITH SAID SECOND MODULATED CARRIER WAVE TRANSMITTED FROM SID SLAVE STATION TO DERIVE THEREFROM A SECOND DIFFERENCE SIGNAL; AND, PHASE DIFFERENCE MEASURING MEANS, TO MEASURE THE PHASE DIFFERENCE FREQUENCY SIGNAL.
Claim 2
Independent Claim
269 words
A SYSTEM OF MEASURING DISTANCE OF THE TYPE WHEREIN A CARRIER WAVE MODULATED BY A SIGNAL OF A MEASURING FREQUENCY IS TRANSMITTED FROM A MASTER STATION POSITIONED AT A FIRST POINT TO A SLAVE STATION POSITIONED AT A SECOND POINT AND THE TRANSMITTED WAVE IS REFLECTED AT THE SECOND POINT, SAID SYSTEM COMPRISING, IN COMBINATION, A FIRST TRANSMITTING MEANS TO TRANSMIT FROM SAID MASTER STATION TO SAID SLAVE STATION A FIRST CARRIER WAVE MODULATED BY A SIGNAL OF A FIRST MEASURING FREQUENCY AND A SIGNAL OF A REFERENCE FREQUENCY; FIRST RECEIVING MEANS AT SAID SLAVE STATION TO RECEIVE SAID MODULATED FIRST CARRIER WAVE TRANSMITTED FROM SAID MASTER STATION; A SECOND TRANSMITTING MEANS AT SAID SLAVE STATION, TO TRANSMIT FROM SAID SLAVE STATION A SECOND CARRIER WAVE MODULATED BY A SIGNAL OF A SECOND MEASURING FREQUENCY, A FIRST MIXER DETECTOR AT SAID SLAVE STATION TO DETECT SID MODULATED SECOND CARRIER WAVE TOGETHER WITH SAID MODULATED FIRST CARRIER WAVE TO DERIVE THEREFROM A FIRST DIFFERENCE SIGNAL SIMULTANEOUSLY WITH THE DETECTION OF SAID REFERENCE FREQUENCY SIGNAL; MEANS TO CONTROL THE SIGNAL OF SECOND MEASURING FREQUENCY SO AS TO MAINTAIN THE PHASE RELATION BETWEEN SAID FIRST DIFFERENCE SIGNAL AND SAID REFERENCE FREQUENCY SIGNAL AT A PREDETERMINED VALUE, A SECONE RECEIVING MEANS IN SAID MASTER STATION TO RECEIVE SAID SECOND MODULATED CARRIER WAVE TRANSMITTED FROM SAID SLAVE STATION, A SECOND MIXER DETECTOR IN SAID MASTER STATIO TO DETECT SID FIRST MODULATED CARRIER WAVE TOGETHER WITH SAID SECOND MODULATED CARRIER WAVE TRANSMITTED FROM SID SLAVE STATION TO DERIVE THEREFROM A SECOND DIFFERENCE SIGNAL; AND, PHASE DIFFERENCE MEASURING MEANS, TO MEASURE THE PHASE DIFFERENCE FREQUENCY SIGNAL.
References Cited (Backward Citations)
US3078460A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |