US3577731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine ignition system
Assignee: RTX Corp
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Filing: 1969-08-01
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Granted: 1971-05-04
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Expires: 1989-08-01
Abstract
Abstract An ignition device for a turbine engine wherein said device has means for compressing air to a specified temperature and then directing said air into a combustion chamber. A predetermined metered amount of fuel in injected into the hot air so that auto ignition temperature is reached within the passageways of a catalytic restrictor-emitter. The flame started by the restrictor-emitter is held on its surface as a flame holder while the flame front projects into the combustion chamber to ignite a fuel/air mixture.
Inventors
- 👤 Raymond J Bruchez Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:02
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/26; F02C7/264
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
145 words
In combination, an engine, said engine having a combustion chamber therein and an igniter, said igniter having means for compressing air to an elevated temperature, container means for holding said compressed air, first conduit means connecting said container means for holding said compressed air to said combustion chamber, valved means for controlling the flow of compressed air from said container means to said first conduit means, a catalytic element in said first conduit means downstream of said valved means, a fuel supply, a second conduit means connecting said fuel supply to said first conduit means for injecting fuel into said first conduit means upstream of said catalytic element, control means for releasing compressed air from said container means into said first conduit means through said valved means and for releasing fuel from said fuel supply into said first conduit means through said second conduit means.
Claim 2
Dependent Claim
145 words
In combination, an engine, said engine having a combustion chamber therein and an igniter, said igniter having means for compressing air to an elevated temperature, container means for holding said compressed air, first conduit means connecting said container means for holding said compressed air to said combustion chamber, valved means for controlling the flow of compressed air from said container means to said first conduit means, a catalytic element in said first conduit means downstream of said valved means, a fuel supply, a second conduit means connecting said fuel supply to said first conduit means for injecting fuel into said first conduit means upstream of said catalytic element, control means for releasing compressed air from said container means into said first conduit means through said valved means and for releasing fuel from said fuel supply into said first conduit means through said second conduit means.
Claim 3
Dependent Claim
23 words
A combination as set forth in claim 1 wherein said means for releasing fuel from said supply releases a metered charge of fuel.
Claim 4
Dependent Claim
66 words
A combination as set forth in claim 1 wherein said means for compressing air comprises two cylinder and piston units, one cylinder and piston unit pumping said air into said container holding means for said compressed air, the second cylinder and piston unit being actuated by fluid pressure directly on one side of piston and then on the other after it has moved a predetermined distance.
Claim 5
Dependent Claim
73 words
A combination as set forth in claim 1 wherein a sensing device is positioned to sense a parameter of compressed air, said sensing device being connected to said control means so that a signal is sent to said control means when said predetermined parameter has been reached and said control means then actuates said valved means releasing said compressed air to flow into said first conduit means and pass through said catalytic element.
Claim 6
Dependent Claim
64 words
A combination as set forth in claim 3 wherein said one cylinder and piston unit has an opening in each end which is connected to said container holding means for said compressed air, a check valve is connected with each opening so that air is pumped from said cylinder and piston unit into said container means for holding said compressed air and held there.
Claim 7
Dependent Claim
121 words
A combination as set forth in claim 1 wherein said means for compressing air comprises two cylinder and piston units, one cylinder and piston unit pumping said air into said container means for holding said compressed air, the second cylinder and piston unit being actuated by fluid pressure directly on one side of piston and then on the other after it has moved a predetermined distance, the one cylinder and piston unit has an opening in each end which is connected to said container means for holding said compressed air, a check valve is connected with each opening so that air is pumped from said cylinder and piston unit into said container means for holding said compressed air and held there.
Claim 8
Dependent Claim
30 words
A combination as set forth in claim 1 wherein said control means is responsive to a sensing device which releases the compressed air when it has reached a predetermined temperature.
Claim 9
Dependent Claim
44 words
A combination as set forth in claim 1 wherein said first conduit means is connected to said container means while its other end projects into said combustion chamber, said valved means being located where said first conduit means is connected to said container means.
Claim 10
Dependent Claim
32 words
A combination as set forth in claim 1 wherein an injector is located in said first conduit means and connected to the second conduit means, said fuel being released through said injector.
Claim 11
Dependent Claim
44 words
A combination as set forth in claim 1 wherein said first conduit means forms a specific volume VE between said valved means and said catalytic element, and said container means forms a specific volume VR, these volumes having a relationship of VE 1/10 VR.
Claim 12
Dependent Claim
37 words
A combination as set forth in claim 1 wherein said catalytic element is a restrictor-emitter which will accomplish auto ignition of a fuel therein with a flow of air passing therethrough which is at an elevated temperature.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |