US3865071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft take off indicator systems
Assignee: Israel Aircraft Industries Ltd
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Filing: 1973-08-23
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Granted: 1975-02-11
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Expires: 1993-08-23
Abstract
Abstract The present invention relates to aircraft take-off indicator systems, for displaying air speed and distance covered during take-off run, and the point-of-no-return for take-off abort. The aircraft indicator system comprises a first measuring device measuring aircraft air speed and having a first scale displaying said measurement, and a second measuring device measuring distance covered during take-off run and having a second scale displaying said measurement. The second scale is parallel to and laterally of the first scale; and a pre-settable marker is disposed to bridge both of said scales and pre-settable so as to be aligned with a predetermined point on each, thereby providing a continuous indication of whether the minimum airspeed for a safe take-off will be reached before the point-of-no-return.
Inventors
- 👤 Jehuda Manor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:07
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/0083; Y; Y10; Y10S; Y10S116/00; Y10S116/43
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
148 words
An aircraft indicator system, comprising: a first measuring device measuring aircraft air speed and having a first scale displaying said measurement, a second measuring device measuring distance covered during take-off run and having a second scale displaying said measurement; said second scale being parallel to and laterally of said first scale; and a pre-settable marker disposed to bridge both of said scales and presettable so as to be aligned with a predetermined point on the second scale corresponding to the point-of-no-return of the aircraft upon take-off, and with a predetermined point on the first scale corresponding to the indicated air speed at that point to assure a safe take-off, whereby visual observation during take-off of the measurements displayed by the two scales with reference to said presettable marker provides a continuous indication of whether the minimum air speed for a safe take-off will be reached before the point-of-no-return.
Claim 2
Dependent Claim
148 words
An aircraft indicator system, comprising: a first measuring device measuring aircraft air speed and having a first scale displaying said measurement, a second measuring device measuring distance covered during take-off run and having a second scale displaying said measurement; said second scale being parallel to and laterally of said first scale; and a pre-settable marker disposed to bridge both of said scales and presettable so as to be aligned with a predetermined point on the second scale corresponding to the point-of-no-return of the aircraft upon take-off, and with a predetermined point on the first scale corresponding to the indicated air speed at that point to assure a safe take-off, whereby visual observation during take-off of the measurements displayed by the two scales with reference to said presettable marker provides a continuous indication of whether the minimum air speed for a safe take-off will be reached before the point-of-no-return.
Claim 3
Dependent Claim
40 words
A system of claim 1, wherein one of said scales is displaceable with respect to the other, such that a given value of air speed on said first scale can be placed opposite a given distance on said second scale.
Claim 4
Dependent Claim
20 words
A system according to claim 1 wherein said first and second scales are both vertical scales disposed in side-by-side relationship.
Claim 5
Dependent Claim
16 words
A system of claim 2, wherein said displaceable scale is that of said aircraft air speed.
Claim 6
Dependent Claim
17 words
A system of claim 1, wherein said marker is a bridging bar pre-settable by a rotary knob.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |