Patent US3744919A successfully refreshed from Google Patents.
US3744919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color measuring with memory
Assignee: AGTRON INCORPORATED A CORP OF
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Filing: 1971-07-16
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Granted: 1973-07-10
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Expires: 1991-07-16
Abstract
Abstract A manually operable direct reading apparatus and method providing reflectance measurements in two spectral modes, for example red and green without the use of high speed rotating filters, light choppers and synchronizing devices. The signal corresponding to one of these modes is stored in a memory for comparison with the signal from the other mode. Ratios between these modes are automatically computed and displayed either as a mathematical ratio or as a numerical value.
Inventors
- 👤 R Babb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:39
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/02; G01J3/10; G01J1/00; G01J1/10; G01J1/16; G01J3/46; G01J3/50; G01J3/51
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
189 words
The method of color grading products by making reflectance measurements of selected ones of said products in separate parts of the light spectrum for use in determining a condition of the products comprising the steps of illuminating a sample product with light of two different hues in well spaced parts of the spectrum, reflecting the light of said two hues from a surface of said product, selecting one of said reflected hues and generating an electric signal therefrom corresponding to the intensity of the reflected hue, amplifying said signal, integrating said amplified signal, storing said integrated signal in a memory for a substantial time duration, supplying the signal from the memory to a high impedance amplifier, disconnecting the integrating device from the memory, selecting the other of said reflectance hues and generating another electric signal therefrom corresponding to the intensity of said other selected hue, amplifying and integrating said other signal, comparing the magnitude of said other integrated signal with the magnitude of said stored signal by supplying these signals simultaneously to an indicating device thereby showing a comparison of the reflectance of the product at said two hues.
Claim 2
Independent Claim
189 words
The method of color grading products by making reflectance measurements of selected ones of said products in separate parts of the light spectrum for use in determining a condition of the products comprising the steps of illuminating a sample product with light of two different hues in well spaced parts of the spectrum, reflecting the light of said two hues from a surface of said product, selecting one of said reflected hues and generating an electric signal therefrom corresponding to the intensity of the reflected hue, amplifying said signal, integrating said amplified signal, storing said integrated signal in a memory for a substantial time duration, supplying the signal from the memory to a high impedance amplifier, disconnecting the integrating device from the memory, selecting the other of said reflectance hues and generating another electric signal therefrom corresponding to the intensity of said other selected hue, amplifying and integrating said other signal, comparing the magnitude of said other integrated signal with the magnitude of said stored signal by supplying these signals simultaneously to an indicating device thereby showing a comparison of the reflectance of the product at said two hues.
Claim 3
Dependent Claim
293 words
In apparatus for color grading products by measuring the light reflectance thereof at different parts of the light spectrum for use in determining a condition of a product, the combination comprising means illuminating a sample of the product with light of two different hues in well spaced parts of the spectrum, light sensitive cell means, a pair of filters selectively transmitting light of said two different hues reflected from the product, manually operable means normally positioning one of said filters between said product and said light sensitive cell means so that light reflected from said product corresponding to one of said hues is transmitted to said light sensitive cell means, amplifying means connected to said light sensitive cell means amplifying the signal received from said cell means corresponding to said one hue, integrating means connected to the output of said amplifying means for integrating said signal, an electronic memory, switch means connecting said memory to said integrating means, a high impedance amplifier connected to said memory, said memory storing said signal of said one hue, said manually operable means moving said one filter out of the light path between said product and said cell means and moving said other filter into said path, said manually operable means simultaneously controlling means disconnecting said memory from said integrating means, said cell means supplying a second electric signal to said amplifying means corresponding to said other hue, said other electric signal being integrated by said integrating means, indicating means and means supplying said integrated other electric signal to said indicating means simultaneously with the stored signal from the output of said high impedance amplifier whereby the comparison of said signals is indicated by said indicating means to provide an indication of a condition of the product.
Claim 4
Dependent Claim
293 words
In apparatus for color grading products by measuring the light reflectance thereof at different parts of the light spectrum for use in determining a condition of a product, the combination comprising means illuminating a sample of the product with light of two different hues in well spaced parts of the spectrum, light sensitive cell means, a pair of filters selectively transmitting light of said two different hues reflected from the product, manually operable means normally positioning one of said filters between said product and said light sensitive cell means so that light reflected from said product corresponding to one of said hues is transmitted to said light sensitive cell means, amplifying means connected to said light sensitive cell means amplifying the signal received from said cell means corresponding to said one hue, integrating means connected to the output of said amplifying means for integrating said signal, an electronic memory, switch means connecting said memory to said integrating means, a high impedance amplifier connected to said memory, said memory storing said signal of said one hue, said manually operable means moving said one filter out of the light path between said product and said cell means and moving said other filter into said path, said manually operable means simultaneously controlling means disconnecting said memory from said integrating means, said cell means supplying a second electric signal to said amplifying means corresponding to said other hue, said other electric signal being integrated by said integrating means, indicating means and means supplying said integrated other electric signal to said indicating means simultaneously with the stored signal from the output of said high impedance amplifier whereby the comparison of said signals is indicated by said indicating means to provide an indication of a condition of the product.
Claim 5
Independent Claim
185 words
The method of color grading proDucts by making reflectance measurements of a product in separate parts of the light spectrum for use in determining a condition of the product comprising the steps of illuminating the product the reflectance of which is being measured with light of two different hues in well spaced parts of the spectrum, reflecting the light of said two hues from a surface of the product being measured, selecting one of said reflected hues and generating an electric signal therefrom corresponding to the intensity of said selected hue, amplifying said signal, rectifying and integrating said signal, storing said integrated signal in a memory, isolating said memory with the stored signal therein, selecting the other of said reflected hues and generating another electric signal therefrom corresponding to the intensity of said other selected hue, amplifying, rectifying and integrating said other electric signal, comparing the magnitude of said other integrated signal with the magnitude of the signal stored in said memory by supplying said signals simultaneously to an indicating device thereby providing a comparison of the reflectance of said product at said two hues.
Claim 6
Independent Claim
185 words
The method of color grading proDucts by making reflectance measurements of a product in separate parts of the light spectrum for use in determining a condition of the product comprising the steps of illuminating the product the reflectance of which is being measured with light of two different hues in well spaced parts of the spectrum, reflecting the light of said two hues from a surface of the product being measured, selecting one of said reflected hues and generating an electric signal therefrom corresponding to the intensity of said selected hue, amplifying said signal, rectifying and integrating said signal, storing said integrated signal in a memory, isolating said memory with the stored signal therein, selecting the other of said reflected hues and generating another electric signal therefrom corresponding to the intensity of said other selected hue, amplifying, rectifying and integrating said other electric signal, comparing the magnitude of said other integrated signal with the magnitude of the signal stored in said memory by supplying said signals simultaneously to an indicating device thereby providing a comparison of the reflectance of said product at said two hues.
Claim 7
Independent Claim
190 words
The method of color grading products by making reflectance measurements of a product in separate parts of the light spectrum for use in determining a condition of the product comprising the steps of illuminating the product the reflectance of which is being measured with light of two different hues in well spaced parts of the spectrum, reflecting the light of said two hues from a surface of the product being measured, selecting one of said reflected hues and generating an electric signal therefrom corresponding to the intensity of said selected hue, amplifying said signal in an amplifier, storing said amplified signal in a memory, manually selecting the other of said reflected hues and isolating said memory from said amplifier and simultaneously connecting said amplifier to an indicating device, generating another electric signal corresponding to the intensity of said other selected hue and simultaneously supplying said other electric signal to said indicating device with the signal stored in said memory thereby comparing the magnitude of said other signal with that of the signal stored in said memory for indicating a comparison of the reflectance of said product at said two hues.
Claim 8
Independent Claim
190 words
The method of color grading products by making reflectance measurements of a product in separate parts of the light spectrum for use in determining a condition of the product comprising the steps of illuminating the product the reflectance of which is being measured with light of two different hues in well spaced parts of the spectrum, reflecting the light of said two hues from a surface of the product being measured, selecting one of said reflected hues and generating an electric signal therefrom corresponding to the intensity of said selected hue, amplifying said signal in an amplifier, storing said amplified signal in a memory, manually selecting the other of said reflected hues and isolating said memory from said amplifier and simultaneously connecting said amplifier to an indicating device, generating another electric signal corresponding to the intensity of said other selected hue and simultaneously supplying said other electric signal to said indicating device with the signal stored in said memory thereby comparing the magnitude of said other signal with that of the signal stored in said memory for indicating a comparison of the reflectance of said product at said two hues.
Claim 9
Dependent Claim
246 words
In apparatus for measuring light reflectance of a product at different parts of the light spectrum for use in determining a condition of the product, the combination comprising means illuminating a product, light sensitive cell means, a pair of filters selectively transmitting light of two different hues reflected from the product, manually operable means selectively moving one of said filters into the light path between said product and said light sensitive cell means, said hues of light being in well spaced parts of the light spectrum, said light sensitive cell means producing a first electric signal corresponding to the hue transmitted by said one filter positioned in said light path, an electronic memory, amplifying means, means connecting said amplifying means to said cell means, an electrical indicating device, means connecting said memory said indicating device, switch means connecting said amplifying means to said memory supplying said first electric signal to said memory for storing said signal therein, said manually operable means selectively moving the other of said filters into said light path so that said light sensitive cell means produces a second electric signal corresponding to the hue transmitted by said other filter, said switch means supplying said second signal to said indicating device and simultaneously disconnecting said amplifying means from said memory, said indicating device being responsive to said first and said second signals simultaneously whereby said indicating device produces an indication showing a comparison of the reflectance of said product at said two hues.
Claim 10
Dependent Claim
246 words
In apparatus for measuring light reflectance of a product at different parts of the light spectrum for use in determining a condition of the product, the combination comprising means illuminating a product, light sensitive cell means, a pair of filters selectively transmitting light of two different hues reflected from the product, manually operable means selectively moving one of said filters into the light path between said product and said light sensitive cell means, said hues of light being in well spaced parts of the light spectrum, said light sensitive cell means producing a first electric signal corresponding to the hue transmitted by said one filter positioned in said light path, an electronic memory, amplifying means, means connecting said amplifying means to said cell means, an electrical indicating device, means connecting said memory said indicating device, switch means connecting said amplifying means to said memory supplying said first electric signal to said memory for storing said signal therein, said manually operable means selectively moving the other of said filters into said light path so that said light sensitive cell means produces a second electric signal corresponding to the hue transmitted by said other filter, said switch means supplying said second signal to said indicating device and simultaneously disconnecting said amplifying means from said memory, said indicating device being responsive to said first and said second signals simultaneously whereby said indicating device produces an indication showing a comparison of the reflectance of said product at said two hues.
Claim 11
Dependent Claim
51 words
Apparatus for color grading products by meaSuring the light reflectance thereof at different parts of the light spectrum for use in determining a condition of the product the combination as set forth in claim 5 further comprising means coupling said switch means to said manually operable means for simultaneous control thereof.
Claim 12
Dependent Claim
69 words
Apparatus for color grading products by measuring the light reflectance thereof at different parts of the light spectrum for use in determining a condition of the product the combination as set forth in claim 5 further comprising integrating means connected to said amplifying means, said integratng means dissipating the part of a previously memorized signal in said memory that exceeds a current signal to be memorized by said memory.
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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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |