US3323129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio direction finder
Assignee: Individual
•
Filing: 1964-04-10
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Granted: 1967-05-30
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Expires: 1984-04-10
Abstract
No abstract record available.
Inventors
- 👤 Sidney P Held
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:47
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
A RADIO DIRECTION FINDER COMPRISING, IN COMBINATION: A MAIN HOUSING HAVING AN ELONGATED, SUBSTANTIALLY FLAT UPPER SURFACE; A RADIO RECEIVER DISPOSED WITHIN SAID MAIN HOUSING, SAID RADIO RECEIVER INCLUDING A VHF (VERY HIGH FREQUENCY) AMPLIFIER, A BROADCAST AMPLIFIER, SWITCH MEANS FOR DERIVING INPUT SIGNALS FROM A SELECTED ONE OF SAID AMPLIFIERS, AND SIGNAL STRENGTH INDICATING MEANS; AN ANTENNA HOUSING HAVING AN ELONGATED CONFIGURATION IN THE HORIZONTAL PLANE AND DISPOSED UPON SAID UPPER SURFACE OF SAID MAIN HOUSING; MEANS MOUNTING SAID ANTENNA HOUSING FOR PIVOTAL MOVEMENT IN THE HORIZONTAL PLANE RELATIVE TO SAID MAIN HOUSING; A BROADCAST ANTENNA INCLUDING AN ELONGATED COIL DISPOSED WITHIN SAID ANTENNA HOUSING AND EXTENDING LENGTHWISE THEREOF; FIRST CIRCUIT MEANS COUPLED TO THE ENDS OF SAID ELONGATED COIL, EXTENDING THROUGH SAID MOUNTING MEANS, AND COUPLED TO SAID BROADCAST AMPLIFIER; A VHF ANTENNA INCLUDING A PAIR OF VERTICALLY EXTENDING, HORIZONTALLY SPACED, ROD-LIKE ELEMENTS WHOSE LOWER ENDS ARE SECURED TO RESPECTIVE ENDS OF SAID ANTENNA HOUSING; AND SECOND CIRCUIT MEANS COUPLED TO SAID LOWER ENDS OF SAID ROD-LIKE ELEMENTS, EXTENDING THROUGH SAID MOUNTING MEANS, AND COUPLED TO SAID VHF AMPLIFIER; WHEREBY SAID SIGNAL STRENGTH INDICATING MEANS MAY BE SELECTIVELY USED IN CONJUNCTION WITH EITHER ONE OF SAID ANTENNAS FOR DIRECTION-FINDING PURPOSES.
Claim 2
Dependent Claim
202 words
A RADIO DIRECTION FINDER COMPRISING, IN COMBINATION: A MAIN HOUSING HAVING AN ELONGATED, SUBSTANTIALLY FLAT UPPER SURFACE; A RADIO RECEIVER DISPOSED WITHIN SAID MAIN HOUSING, SAID RADIO RECEIVER INCLUDING A VHF (VERY HIGH FREQUENCY) AMPLIFIER, A BROADCAST AMPLIFIER, SWITCH MEANS FOR DERIVING INPUT SIGNALS FROM A SELECTED ONE OF SAID AMPLIFIERS, AND SIGNAL STRENGTH INDICATING MEANS; AN ANTENNA HOUSING HAVING AN ELONGATED CONFIGURATION IN THE HORIZONTAL PLANE AND DISPOSED UPON SAID UPPER SURFACE OF SAID MAIN HOUSING; MEANS MOUNTING SAID ANTENNA HOUSING FOR PIVOTAL MOVEMENT IN THE HORIZONTAL PLANE RELATIVE TO SAID MAIN HOUSING; A BROADCAST ANTENNA INCLUDING AN ELONGATED COIL DISPOSED WITHIN SAID ANTENNA HOUSING AND EXTENDING LENGTHWISE THEREOF; FIRST CIRCUIT MEANS COUPLED TO THE ENDS OF SAID ELONGATED COIL, EXTENDING THROUGH SAID MOUNTING MEANS, AND COUPLED TO SAID BROADCAST AMPLIFIER; A VHF ANTENNA INCLUDING A PAIR OF VERTICALLY EXTENDING, HORIZONTALLY SPACED, ROD-LIKE ELEMENTS WHOSE LOWER ENDS ARE SECURED TO RESPECTIVE ENDS OF SAID ANTENNA HOUSING; AND SECOND CIRCUIT MEANS COUPLED TO SAID LOWER ENDS OF SAID ROD-LIKE ELEMENTS, EXTENDING THROUGH SAID MOUNTING MEANS, AND COUPLED TO SAID VHF AMPLIFIER; WHEREBY SAID SIGNAL STRENGTH INDICATING MEANS MAY BE SELECTIVELY USED IN CONJUNCTION WITH EITHER ONE OF SAID ANTENNAS FOR DIRECTION-FINDING PURPOSES.
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) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |