US4157238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for combustion apparatus and method
Assignee: Energy Controls Inc
•
Filing: 1976-12-15
•
Granted: 1979-06-05
•
Expires: 1996-12-15
Abstract
Abstract Apparatus and method for changing the calibrated linkage relationship between two flow control devices of combustion apparatus without impeding the normal operation of the associated process. Means are provided, responsive to remote, manual or automatic control, to calibrate a jackshaft linkage type of control apparatus in order to provide for range changes and zero adjustment.
Inventors
- 👤 Robert A. van Berkum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:54
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/003; F23N5/006; F23N2235/00; F23N2235/02; F23N2235/06; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/0346
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
147 words
A method of controlling the operation of combustion apparatus having at least two flow control devices operated in a calibrated relationship by actuation means responsive to a first control signal, said method comprising the steps of: (a) providing variable means between at least one of said flow control devices and said actuation means, the actuation of said variable means causing the calibrated relationship of said flow control devices to be changed in such a way that the change in the ratio of the two flows remains substantially constant throughout the operating range of the combustion apparatus from minimum to maximum flow; (b) sensing combustion conditions in said combustion apparatus and generating a second control signal; (c) conducting said second control signal to said variable means; whereby, the calibrated relationship of said flow control devices is altered by a fixed percentage in response to said second control signal.
Claim 2
Independent Claim
147 words
A method of controlling the operation of combustion apparatus having at least two flow control devices operated in a calibrated relationship by actuation means responsive to a first control signal, said method comprising the steps of: (a) providing variable means between at least one of said flow control devices and said actuation means, the actuation of said variable means causing the calibrated relationship of said flow control devices to be changed in such a way that the change in the ratio of the two flows remains substantially constant throughout the operating range of the combustion apparatus from minimum to maximum flow; (b) sensing combustion conditions in said combustion apparatus and generating a second control signal; (c) conducting said second control signal to said variable means; whereby, the calibrated relationship of said flow control devices is altered by a fixed percentage in response to said second control signal.
Claim 3
Independent Claim
163 words
A method of controlling the operation of combustion apparatus having at least two flow control devices operated in a calibrated relationship by actuation means responsive to a first control signal, said method comprising the steps of: (a) providing variable means between at least one of said flow control devices and said actuation means, said variable means defined by a linkage including a lever having a radius length and a connecting link having a length, the actuation of said variable means causing the calibrated relationship of said flow control devices to be changed; (b) sensing combustion conditions in said combustion apparatus and generating a second control signal; (c) conducting said second control signal to said variable means causing an adjustment to be made to the radius length of said lever and a corresponding adjustment of the length of said connecting link; whereby, the calibrated relationship of said flow control devices is altered in a fixed percentage ratio in response to said second control signal.
Claim 4
Independent Claim
163 words
A method of controlling the operation of combustion apparatus having at least two flow control devices operated in a calibrated relationship by actuation means responsive to a first control signal, said method comprising the steps of: (a) providing variable means between at least one of said flow control devices and said actuation means, said variable means defined by a linkage including a lever having a radius length and a connecting link having a length, the actuation of said variable means causing the calibrated relationship of said flow control devices to be changed; (b) sensing combustion conditions in said combustion apparatus and generating a second control signal; (c) conducting said second control signal to said variable means causing an adjustment to be made to the radius length of said lever and a corresponding adjustment of the length of said connecting link; whereby, the calibrated relationship of said flow control devices is altered in a fixed percentage ratio in response to said second control signal.
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) | 1982-06-04 | 1982-12-04 | 1983-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-04 | 1986-12-04 | 1987-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-04 | 1990-12-04 | 1991-06-05 | $7700.00 | Window Closed / Lapsed |