US3179940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna system for twin-channel visual direction finder
Assignee: MAXIMILIAN WACHTLER
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Filing: 1961-10-23
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Granted: 1965-04-20
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Expires: 1981-10-23
Abstract
No abstract record available.
Inventors
- 👤 Zauscher Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:16
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/02; G01S3/14; G01S3/143; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
AN ANTENNA SYSTEM FOR A DIRECTION FINDER PROVIDED WITH A VISUAL INDICATOR HAVING MARKER MEANS ADAPTED TO BE DEFLECTED IN TWO ORTHOGONALLY RELATED DIRECTIONS BY APPLICATION OF A CONTROL VOLTAGE ACROSS A FIRST AND A SECOND PAIR OF INPUT TERMINALS, RESPECTIVELY, THE EXTENT AND SENSE OF DISPLACEMENT OF SAID MARKER MEANS IN EITHER OF SAID DIRECTIONS DEPENDING UPON THE MAGNITUDE AND SIGN OF THE VOLTAGE APPLIED TO THE RESPECTIVE TERMINALS, COMPRISING: AN ARRAY OF N DIRECTIVE ANTENNA MEANS ANGULARLY EQUISPACED ABOUT A VERTICAL AXIS, N BEING AN INTEGER GREATER THAN FOUR, EACH OF SAID ANTENNA MEANS HAVING A DIRECTIVE RECEIVING PATTERN WITH A HORIZONTAL MAIN LOBE TRAINED RADIALLY OUTWARDLY FROM SAID AXIS, SAID LOBE HAVING A SUBSTANTIALLY SINUSOIDAL CHARACTERISTIC IN POLAR CO-ORDINATES CENTERED ON SAID AXIS, SAID LOBE FURTHER HAVING AN APERTURE ANGLE INCLUDED BETWEEN ITS TWO RADIAL TANGENTS WHICH IS SUBSTANTIALLY TWICE THE ANGULAR DISTANCE
Claim 2
Dependent Claim
146 words
AN ANTENNA SYSTEM FOR A DIRECTION FINDER PROVIDED WITH A VISUAL INDICATOR HAVING MARKER MEANS ADAPTED TO BE DEFLECTED IN TWO ORTHOGONALLY RELATED DIRECTIONS BY APPLICATION OF A CONTROL VOLTAGE ACROSS A FIRST AND A SECOND PAIR OF INPUT TERMINALS, RESPECTIVELY, THE EXTENT AND SENSE OF DISPLACEMENT OF SAID MARKER MEANS IN EITHER OF SAID DIRECTIONS DEPENDING UPON THE MAGNITUDE AND SIGN OF THE VOLTAGE APPLIED TO THE RESPECTIVE TERMINALS, COMPRISING: AN ARRAY OF N DIRECTIVE ANTENNA MEANS ANGULARLY EQUISPACED ABOUT A VERTICAL AXIS, N BEING AN INTEGER GREATER THAN FOUR, EACH OF SAID ANTENNA MEANS HAVING A DIRECTIVE RECEIVING PATTERN WITH A HORIZONTAL MAIN LOBE TRAINED RADIALLY OUTWARDLY FROM SAID AXIS, SAID LOBE HAVING A SUBSTANTIALLY SINUSOIDAL CHARACTERISTIC IN POLAR CO-ORDINATES CENTERED ON SAID AXIS, SAID LOBE FURTHER HAVING AN APERTURE ANGLE INCLUDED BETWEEN ITS TWO RADIAL TANGENTS WHICH IS SUBSTANTIALLY TWICE THE ANGULAR DISTANCE
References Cited (Backward Citations)
US2547622A
Cited
US3005198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |