Patent US3738165A successfully refreshed from Google Patents.
US3738165A
Expired / Lapsed
US
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Aircraft takeoff abort indicator
Assignee: Individual
•
Filing: 1972-02-07
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Granted: 1973-06-12
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Expires: 1992-02-07
Abstract
Abstract An apparatus for indicating to the pilot of an aircraft whether to abort a takeoff because of subnormal acceleration of the aircraft during the takeoff run. The apparatus includes: a chart of the normal takeoff acceleration versus takeoff time for the aircraft for a particular set of conditions; a warning indicator; and means adapted to scan the chart, and responsive to subnormal takeoff acceleration, for actuating the warning indicator. The chart is provided with a conductive area representing the subnormal takeoff acceleration versus takeoff time relationship for the aircraft and particular set of conditions, and the actuating means for the warning indicator includes a contact engageable with such conductive area. Each aircraft is provided with a set of charts covering different airports, different aircraft weights, different wind and barometric pressure conditions, and the like.
Inventors
- 👤 R Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:45
CPC Classifications
G; G01; G01C; G01C23/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
90 words
In an aircraft takeoff abort indicator, the combination of: a. a chart carrier; b. a chart on said carrier of normal takeoff acceleration versus takeoff time for the aircraft; c. carrier driving means for displacing the takeoff time scale on said chart past a reference point; d. an acceleration indicator at said reference point and adapted to indicate on said chart the actual takeoff acceleration of the aircraft versus takeoff time; and f. acceleration responsive means responsive to the actual takeoff acceleration of the aircraft for actuating said acceleration indicator.
Claim 2
Dependent Claim
90 words
In an aircraft takeoff abort indicator, the combination of: a. a chart carrier; b. a chart on said carrier of normal takeoff acceleration versus takeoff time for the aircraft; c. carrier driving means for displacing the takeoff time scale on said chart past a reference point; d. an acceleration indicator at said reference point and adapted to indicate on said chart the actual takeoff acceleration of the aircraft versus takeoff time; and f. acceleration responsive means responsive to the actual takeoff acceleration of the aircraft for actuating said acceleration indicator.
Claim 3
Dependent Claim
45 words
An abort indicator as defined in claim 1 including: a. a warning indicator; and b. actuating means adapted to scan the normal takeoff acceleration versus takeoff time relationship on the chart, and responsive to subnormal takeoff acceleration of the aircraft, for actuating said warning indicator.
Claim 4
Dependent Claim
41 words
An abort indicator as set forth in claim 2 wherein said chart has a conductive area representing the subnormal takeoff acceleration versus takeoff time relationship for the aircraft, and wherein said actuating means includes a contact engageable with said conductive area.
Claim 5
Dependent Claim
32 words
An abort indicator according to claim 3 including another conductive area on and extending across the chart at a point on the time scale indicating the maximum permissible takeoff time without aborting.
Claim 6
Dependent Claim
29 words
An abort indicator as defined in claim 4 wherein said carrier is a rotor and said chart has a radial takeoff acceleration scale and a circumferential takeoff time scale.
Claim 7
Dependent Claim
29 words
An abort indicator as defined in claim 2 wherein said carrier is a rotor and said chart has a radial takeoff acceleration scale and a circumferential takeoff time scale.
Claim 8
Dependent Claim
14 words
An abort indicator as defined in claim 2 which is a portable, self-contained unit.
Claim 9
Dependent Claim
63 words
In an aircraft takeoff indicator, the combination of: a. a chart of normal takeoff acceleration versus takeoff time for the aircraft; means for rotating said chart at a constant speed b. a warning indicator operatively connected to said chart; and c. acceleration responsive means adapted to scan said chart, and responsive to subnormal takeoff acceleration of the aircraft, for actuating said warning indicator.
Claim 10
Dependent Claim
63 words
In an aircraft takeoff indicator, the combination of: a. a chart of normal takeoff acceleration versus takeoff time for the aircraft; means for rotating said chart at a constant speed b. a warning indicator operatively connected to said chart; and c. acceleration responsive means adapted to scan said chart, and responsive to subnormal takeoff acceleration of the aircraft, for actuating said warning indicator.
References Cited (Backward Citations)
US3034096A
Cited
US3504335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |