Patent US3737664A successfully refreshed from Google Patents.
US3737664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burner monitor apparatus
Assignee: Kockums Mekaniska Verkstads AB
•
Filing: 1971-01-25
•
Granted: 1973-06-05
•
Expires: 1991-01-25
Abstract
Abstract In a burner monitor apparatus comprising light intensity responsive means and comparator means, the light intensity responsive means are coupled to said comparator means for actuating the reference voltage of all said comparator means, whereby all the comparator means are responsive to all the light intensity responsive means.
Inventors
- 👤 J Oldenburg
- 👤 A Rosenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:09
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/08; F23N5/082; F23N2229/00; F23N2229/16; F23N2237/00; F23N2237/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
An apparatus for monitoring the function of at least two burners disposed in a boiler comprising in combination; at least two light intensity responsive means respectively associated with the burners in the vicinity thereof for sensing the light intensity in the flames from their associated burners, at least two comparator means respectively associated with and connected to said light intensity responsive means for comparing the signals received from the associated light intensity responsive means with the reference voltages of the comparator means, and means interconnecting said comparator means such that each of said light intensity responsive means instantaneously actuates the reference voltages of both of said comparator means which reference voltages will thereby become proportional to the highest of the intensities monitored.
Claim 2
Independent Claim
122 words
An apparatus for monitoring the function of at least two burners disposed in a boiler comprising in combination; at least two light intensity responsive means respectively associated with the burners in the vicinity thereof for sensing the light intensity in the flames from their associated burners, at least two comparator means respectively associated with and connected to said light intensity responsive means for comparing the signals received from the associated light intensity responsive means with the reference voltages of the comparator means, and means interconnecting said comparator means such that each of said light intensity responsive means instantaneously actuates the reference voltages of both of said comparator means which reference voltages will thereby become proportional to the highest of the intensities monitored.
Claim 3
Dependent Claim
70 words
Apparatus defined in claim 1 wherein said comparator means are operational amplifiers each having two inputs, wherein one of said light intensity responsive means is connected to one input of one operational amplifier and the other light intensity responsive means is connected to one input of the other operational amplifier, and wherein the other of said one operational amplifier is connected to the other input of the other operational amplifier.
Claim 4
Dependent Claim
37 words
Apparatus as defined in claim 2 further including a resistor and capacitor network, and wherein the input of each operational amplifier is connected to the input of the other operational amplifier via said resistor and capacitor network.
Claim 5
Dependent Claim
15 words
Apparatus as defined in claim 2 wherein said light intensity responsive means are each photocells.
Claim 6
Dependent Claim
10 words
Apparatus defined in claim 4 wherein said photocells are UV-cells.
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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |