US3553695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter airborne beacon system for use in formation flying
Assignee: Bendix Corp
•
Filing: 1967-09-29
•
Granted: 1971-01-05
•
Expires: 1987-09-29
Abstract
Abstract A FORMATION FLYING HELICOPTER TRANSMITTING APPARATUS TO SEQUENTIALLY TRANSMIT ELECTROMAGNETIC ENERGY FROM FOUR PHYSICALLY SEPARATED ANTELLAS POSITIONED ON A HELICOPTER AND OUTLINING POINTS THEREOF AND TO SYNCHRONIZE THE ENERGY TRANSMISSION IN ACCORDANCE WITH PREDETERMINED POSITIONS OF THE HELICOPTER ROTOR BLADES SO AS TO MINIMIZE ROTOR MODULATION INTEFERENCE. THE TRANSMITTER IS PROVIDED WITH AN OPTICAL ROTOR SYNCHRONIZATION CIRCUIT TO EFFECT THE ENERGY TRANSMSSION AT THE PERDETERMINED ROTOR BLADE POSI- TIONS AND A CIRCULAR ASSEMBLY TO AUTOMATICALLY SEQUENCE THE ENERGY TRANSMISSION FROM THE RESPECTIVE ANTENNAS.
Inventors
- 👤 Arthur Simon
- 👤 William Charles Troll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:46
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |