US3836247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic color printing apparatus with improved light terminating mechanism
Assignee: Agfa Gevaert AG
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Filing: 1973-09-14
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Granted: 1974-09-17
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Expires: 1993-09-14
Abstract
Abstract Light from a light source furnishing a first, second and third primary color folds on first, second and third photoreceiver means which furnish, respectively, a first, second and third stop signal when the received light has reached a predetermined total quantity. Logic means are provided for terminating the illumination in the colors corresponding to the first and second so-received stop signals directly by inserting the complementary color filter into the path of the light. The logic means prevent operation of the third complementary filter in response to the third received stop signal and, instead, directly operate the shutter terminating the illumination in all three colors.
Inventors
- 👤 V Weinert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:37
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72; G03B27/73; G03B27/735
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
166 words
In color photographic apparatus having a light source for furnishing light in a first, second and third pimary color, first, second and third photoreceiver means for receiving, respectively, light in said first, second and third primary colors and for furnishing, respectively, a first, second and third stop signal when the so-received light has reached a predetermined total light quantity, first, second and third individual light terminating means, for terminating the illumination in a corresponding one of said primary colors upon receipt of the corresponding one of said stop signals, and common terminating means for terminating the illUmination in all three of said primary colors substantially simultaneously in response to a terminating signal, in combination, first logic means for preventing the application of a last furnished one of said stop signals to the corresponding individual light terminating means following receipt of the first two of said stop signals; and second logic means for furnishing said terminating signal in response to said last-furnished one of said stop signals.
Claim 2
Dependent Claim
166 words
In color photographic apparatus having a light source for furnishing light in a first, second and third pimary color, first, second and third photoreceiver means for receiving, respectively, light in said first, second and third primary colors and for furnishing, respectively, a first, second and third stop signal when the so-received light has reached a predetermined total light quantity, first, second and third individual light terminating means, for terminating the illumination in a corresponding one of said primary colors upon receipt of the corresponding one of said stop signals, and common terminating means for terminating the illUmination in all three of said primary colors substantially simultaneously in response to a terminating signal, in combination, first logic means for preventing the application of a last furnished one of said stop signals to the corresponding individual light terminating means following receipt of the first two of said stop signals; and second logic means for furnishing said terminating signal in response to said last-furnished one of said stop signals.
Claim 3
Dependent Claim
47 words
An arrangement as set forth in claim 1, wherein said individual light terminating means each comprise a complementary filter movable into the path of said light; and means moving said filter into said path of said light upon receipt of the corresponding one of said stop signals.
Claim 4
Dependent Claim
34 words
An arrangement as set forth in claim 1, wherein said common terminating means comprise a shutter, and means for moving said shutter into the path of said light in response to said terminating signal.
Claim 5
Dependent Claim
41 words
An arrangement as set forth in claim 1, wherein said second logic means comprise a NAND-gate having a first, second and third input respectively connected to said first, second and third photoreceiver means and an output connected to said terminating means.
Claim 6
Dependent Claim
38 words
An arrangement as set forth in claim 4, further comprising delay means interconnected between said output of sand NAND-gate and said terminating means, for delaying the operation of said terminating means relative to receipt of said terminating signal.
Claim 7
Dependent Claim
93 words
An arrangement as set forth in claim 1, wherein said first logic means comprise first, second and third AND-gate means each having a first input connected to a corresponding one of said photoreceiver means, a second input, and an output connected to a corresponding one of said individual light terminating means; first, second and third NAND-gate means, each having a first and second input respectively connected to a selected one of said outputs of said AND-gate means and an output connected to the second input of the remaining one of said AND-gate means.
Claim 8
Dependent Claim
27 words
An arrangement as set forth in claim 6, wherein each of said AND-gate means comprise a NAND-gate and an inverter connected to the output of said NAND-gate.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |