US3755680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame color signature apparatus
Assignee: United States Department of the Army
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Filing: 1971-09-10
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Granted: 1973-08-28
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Expires: 1991-09-10
Abstract
Abstract An instrument for determining the individual proportions of specific colors within the visual spectrum which includes sensing means for each color to provide an electrical analog of the color energy/bandwidth. The sensing means comprises for each spectrum, one or more photocells each coupled with an appropriate transmission filter. These photocell-filter combinations are selected to cover uniform portions of the spectrum to provide weighted equal responses for selected color bands across the entire visual spectrum. The outputs of these combinations are summed to give the total spectrum output as well as being individually applied to separate divider circuits that also receive the summed total and provide a ratio voltage output signal. This latter signal from each divider is fed into a separate input of a chart recorder where the continuous percentage value of each color is simultaneously recorded.
Inventors
- 👤 C Smith
- 👤 L Szabo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:18
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/28; G01J3/30; G01J3/36
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
145 words
An instrument for determining the individual proportions of selected color bands of a light source , which comprises: a channel for each selected color band which includes in series therein photosensor means for providing a weighted electrical analog of the respective individual color band of said source; ratio/divider means , having an electrical input connected tO receive the analog output of said sensor means , for providing an electrical output which is the ratio of said one input to that of a second input , and having said electrical output appled to one input of a plural input indicating means, and summing means for providing at said second input the summed totalized value of all of said weighted analog outputs of said sensor means; whereby said indicating means will display simultaneously and continuously the individual proportions of said weighted analogs of said selected color bands.
Claim 2
Dependent Claim
145 words
An instrument for determining the individual proportions of selected color bands of a light source , which comprises: a channel for each selected color band which includes in series therein photosensor means for providing a weighted electrical analog of the respective individual color band of said source; ratio/divider means , having an electrical input connected tO receive the analog output of said sensor means , for providing an electrical output which is the ratio of said one input to that of a second input , and having said electrical output appled to one input of a plural input indicating means, and summing means for providing at said second input the summed totalized value of all of said weighted analog outputs of said sensor means; whereby said indicating means will display simultaneously and continuously the individual proportions of said weighted analogs of said selected color bands.
Claim 3
Dependent Claim
16 words
The instrument according to claim 1 wherein said sensor means are selected photocell transmission filter combinations.
Claim 4
Dependent Claim
14 words
The instrument according to claim 2 wherein said indicating means is a chart recorder.
Claim 5
Dependent Claim
27 words
The instrument according to claim 1 wherein said summing means is an operational summing amplifier also having its output connected to an input of said indicating means.
Claim 6
Dependent Claim
51 words
The instrument according to claim 1 wherein said summing means includes a summing amplifier connected to receive and sum said weighted analog outputs and having its output connected to the electrical input of an electrical to mechanical servomechanism for providing at its mechanical output an analog of the summed weighted analogs.
Claim 7
Dependent Claim
77 words
The instrument according to claim 5 wherein said ratio/divider means includes an operational amplifier, a variable resistor having a movable pole connected to the input of said operational amplifier and one fixed terminal thereof connected to the output of said operational amplifier and the other fixed terminal connected to receive said weighted analog, mechanical linkage means connected intermediate said pole and said mechanical output for varying said resistor in accordance with said summed value through said servomechanism.
Claim 8
Dependent Claim
25 words
The instrument according to claim 1 wherein said electrical analogs are weighted in the following proportions; yellow and orange:1, violet:2, green and blue:3, and red:4.
Claim 9
Dependent Claim
41 words
The instrument according to claim 2, wherein said electrical analogs are weighted by including selected numbers of said photocell-transmission filter combinations in said channels in the following proportions; yellow and orange: 1, violet: 2, green and blue: 3, and red: 4.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |