Digital range measuring system
Abstract
Abstract COMPLEMENT VALUE. ANOTHER COUNTER CIRCUIT COUNTS UNSECCESSFUL TRANSMISSION AND RECEPTION (RANGING) PERIODS AND AFTER A REDETERMINED NUMBER OF CONSECUTIVE SUCH PERIODS THE SYSTEM SWITCHED FROM THE TRACK OF THE ACQUISITION MODE. A DIGITAL SYSTEM FOR MEASURING THE RANGE OF A REMOTE OBJECT IN RESPONSE TO LASER ENERGY REFLECTED FROM THE OBJECT AND FOR CONTROLLING THE MODE OF OPERATION. WHEN LOGIC CIRCUITS DETERMINE THAT A SIGNAL IS A VALID RETURN SIGNAL (I.E. NOT NOISE ENERGY) THE SYSTEM SWITCHES TO A TRACK MODE OF OPERATION WHEREIN IT RESPONDS ONLY TO SIGNALS CONCIDENT WITH A RELATIVELY NARROW TRACKING GATE. IF THE RETURN SIGNAL SHOULD FADE (DETECHABLE SIGNAL NOT RECEIVED) A COUNTER, WHICH STORES THE DIGITAL COMPLEMENT OF THE RANGE INFORMATION AND WHICH POSITIONS THE TRACKING GATE, IS AUTOMATICALLY RECYCLED TO THE LAST STORED RANGE
Inventors
- 👤 Robert P Farnsworth
- 👤 Richard W Wyeth
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |