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US3757338A
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Glide slope lock-out network
Assignee: Bendix Corp
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Filing: 1971-02-05
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Granted: 1973-09-04
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Expires: 1991-02-05
Abstract
Abstract An improved glide slope receiver circuit prevents false acquisition of glide slope and insures that only a good and existing glide slope signal will arm the glide slope circuitry. A normally charged capacitor applies lock-out potential to the glide slope switching network. A reference square wave is applied to open a gate. Below glide slope signals are received out of phase with the reference and proceed through the gate to discharge the capacitor through a time constant network. Discharge of the capacitor releases the lock-out potential at the glide slope switching network, thus permitting the glide slope receiver to acquire the glide slope at a glide slope signal null.
Inventors
- 👤 H Liebman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:33
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
116 words
Means for receiving a glide slope signal which defines a glide slope and including utilization means responsive to said glide slope signal when applied thereto comprising: means responsive to said glide slope signal for generating a first signal when said receiving means is below said glide slope, for generating a second signal when said receiving means is above said glide slope and for generating a third signal when said receiving means is on said glide slope; and, means responsive to a predetermined time duration of said first signal and the subsequent generation of said third signal without the intervening generation of said second signal for communicating said first, second and third signals to said utilization means.
Claim 2
Dependent Claim
116 words
Means for receiving a glide slope signal which defines a glide slope and including utilization means responsive to said glide slope signal when applied thereto comprising: means responsive to said glide slope signal for generating a first signal when said receiving means is below said glide slope, for generating a second signal when said receiving means is above said glide slope and for generating a third signal when said receiving means is on said glide slope; and, means responsive to a predetermined time duration of said first signal and the subsequent generation of said third signal without the intervening generation of said second signal for communicating said first, second and third signals to said utilization means.
Claim 3
Dependent Claim
105 words
Means for receiving a glide slope signal which defines a glide slope and including utilization means responsive to said glide slope signal when communicated thereto comprising: means responsive to said glide slope signal for generating a first signal when said receiving means is below said glide slope, for generating a second signal when said receiving means is above said glide slope and for generating a third signal when said receiving means is on said glide slope; and, means responsive to a predetermined time duration of said first signal and subsequently said third signal for communicating subsequent first, second and third signals to said utilization means.
Claim 4
Dependent Claim
105 words
Means for receiving a glide slope signal which defines a glide slope and including utilization means responsive to said glide slope signal when communicated thereto comprising: means responsive to said glide slope signal for generating a first signal when said receiving means is below said glide slope, for generating a second signal when said receiving means is above said glide slope and for generating a third signal when said receiving means is on said glide slope; and, means responsive to a predetermined time duration of said first signal and subsequently said third signal for communicating subsequent first, second and third signals to said utilization means.
Claim 5
Dependent Claim
61 words
Means as recited in claim 2 wherein said communicating means includes: means responsive to said first signal for generating a gate qualifying signal a fixed time delay after said first signal is generated; and, latching means qualified by said gate qualifying signal and subsequently latched by said third signal for communicating said first, second and third signals to said utilization means.
References Cited (Backward Citations)
US2524746A
Cited
US2709053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |