← Back to Patent Explorer
US3844111A Expired / Lapsed US ⏱️ 0.0 years remaining

Solid state starting and operating system for a constant combustion engine

Assignee: Ford Motor Co
•
Filing: 1972-12-20
•
Granted: 1974-10-29
•
Expires: 1992-12-20
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Solid state NOR gates are connected into a logic circuit for controlling, starting and operating a gas turbine engine. The logic circuit requires less electric current and reduces switch costs while increasing overall reliability and life.

Inventors

  • 👤 J Fenton

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 06:20
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/26

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 274 words
A starting and operating system for a constant combustion engine having a starter motor and a driver circuit for said starter motor, having means for discharging fuel into a combustion chamber of said engine and a driver circuit for said fuel discharge means, and having an ignition system for igniting fuel discharged into said combustion chamber and a driver circuit for said ignition system, said constant combustion engine starting and operating system comprising, in combination: an engine starting switch; means for indicating combustion in said combustion chamber; means for sensing whether the speed of said engine is above or below a first predetermined level; means for sensing whether the speed of said engine is above or below a second predetermined level; NOR gate logic circuit means for energizing said starter motor driver circuit, said fuel discharge means driver circuit, and said ignition system driver circuit when said starting switch is actuated and the speed of said engine is below said first predetermined level; NOR gate logic circuit means for de-energizing said starter motor driver circuit and said ignition system driver circuit when the speed of said engine exceeds said second predetermined level; NOR gate logic circuit means for de-energizing said starter motor driver circuit, said fuel discharge means driver circuit and said ignition system driver circuit if said combustion indicating means does not indicate combustion at the end of a predetermined time interval initiated by actuation of said starting switch; and NOR gate logic circuit means for de-energizing said fuel discharge means driver circuit if said combustion indicating means does not indicate combustion when the speed of said engine exceeds said second predetermined level.
Claim 2
Dependent Claim 274 words
A starting and operating system for a constant combustion engine having a starter motor and a driver circuit for said starter motor, having means for discharging fuel into a combustion chamber of said engine and a driver circuit for said fuel discharge means, and having an ignition system for igniting fuel discharged into said combustion chamber and a driver circuit for said ignition system, said constant combustion engine starting and operating system comprising, in combination: an engine starting switch; means for indicating combustion in said combustion chamber; means for sensing whether the speed of said engine is above or below a first predetermined level; means for sensing whether the speed of said engine is above or below a second predetermined level; NOR gate logic circuit means for energizing said starter motor driver circuit, said fuel discharge means driver circuit, and said ignition system driver circuit when said starting switch is actuated and the speed of said engine is below said first predetermined level; NOR gate logic circuit means for de-energizing said starter motor driver circuit and said ignition system driver circuit when the speed of said engine exceeds said second predetermined level; NOR gate logic circuit means for de-energizing said starter motor driver circuit, said fuel discharge means driver circuit and said ignition system driver circuit if said combustion indicating means does not indicate combustion at the end of a predetermined time interval initiated by actuation of said starting switch; and NOR gate logic circuit means for de-energizing said fuel discharge means driver circuit if said combustion indicating means does not indicate combustion when the speed of said engine exceeds said second predetermined level.
Claim 3
Dependent Claim 63 words
A starting and operating system for a constant combustion engine in accordance with claim 1, said system further comprising solid state relighting circuit means including NOR gate logic circuitry for energizing said fuel discharge means driver circuit and said ignition system driver circuit when the speed of said engine exceeds said first predetermined level and said combustion indicating means does not indicate combustion.
Claim 4
Dependent Claim 64 words
A starting and operating system for a constant combustion engine in accordance with claim 1, said system further comprising solid state relighting circuit means including NOR gate logic circuitry for energizing said fuel discharge means driver circuit and said ignition system driver circuit when the speed of said engine is below said second predetermined level and said combustion indicating means does not indicate combustion.
Claim 5
Dependent Claim 68 words
A starting and operating system for a constant combustion engine in accordance with claim 2, said system further comprising circuit means including NOR gate logic circuitry for limiting the energization of said fuel discharge means driver circuit and said ignition system driver circuit, when the speed of said engine exceeds said first predetermined level and said combustion indicating means does not indicate combustion, to a predetermined time interval.
Claim 6
Dependent Claim 69 words
A starting and operating system for a constant combustion engine in accordance with claim 3, said system further comprising circuit means including NOR gate logic circuitry for limiting the energization of said fuel discharge means driver circuit and said ignition system driver circuit, when the speed of said engine is below said second predetermined level and said combustion indicating means does not indicate combustion, to a predetermined time interval.

References Cited (Backward Citations)

US3469395A Cited
US3382671A Cited
US3470691A Cited
US3600887A Cited
US3662545A Cited
US3686859A Cited
US3691759A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-10-28 1978-04-29 1978-10-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-10-28 1982-04-29 1982-10-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-10-28 1986-04-29 1986-10-29 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag