US3636836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic process for preparing a screen structure for a cathode-ray tube
Assignee: RCA Licensing Corp
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Filing: 1970-06-01
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Granted: 1972-01-25
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Expires: 1990-06-01
Abstract
Abstract A process for preparing a screen structure for a cathode-ray tube of the aperture-mask type comprising placing the panel assembly including the aperture mask on a lighthouse and unshuttering the light source, thereby projecting light through the mask incident on the panel. During the exposure and after a delay following unshuttering, preferably of at least 0.4 seconds, a portion of the light transmitted through the mask is continuously measured, and the light source is continuously adjusted to produce a total luminous flux on the film. In a preferred form of the novel process, the intensity level of the incident light is restored to a predetermined intensity value after the exposure.
Inventors
- 👤 William Joseph Maddox
- 👤 Morris Robert Weingarten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:33
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/227; H01J9/2271; H01J9/2272
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
177 words
In a method of making a luminescent-screen structure for a cathode-ray tube having a panel assembly comprising a faceplate panel including a viewing window and an aperture mask in a predetermined position spaced from said viewing window, said method comprising: 1. coating a photosensitive composition whose solubility is altered when it is exposed to light upon the inner surface of said viewing window, 2. positioning said aperture mask in said panel in said predetermined position opposite said photosensitive coating, 3. positioning said panel assembly on a lighthouse having a normally shuttered light source that emits light continuously, 4. unshuttering said light source and projecting light having a predetermined initial intensity through said mask assembly upon said coating for a predetermined time, 5. then, after a delay following unshuttering, continuously measuring a portion of the light transmitted through said mask and producing a signal which is indicative of the intensity level of said transmitted light, 6. and continuously adjusting said light source in response to said signal to provide a desired total luminous flux incident on said coating.
Claim 2
Dependent Claim
177 words
In a method of making a luminescent-screen structure for a cathode-ray tube having a panel assembly comprising a faceplate panel including a viewing window and an aperture mask in a predetermined position spaced from said viewing window, said method comprising: 1. coating a photosensitive composition whose solubility is altered when it is exposed to light upon the inner surface of said viewing window, 2. positioning said aperture mask in said panel in said predetermined position opposite said photosensitive coating, 3. positioning said panel assembly on a lighthouse having a normally shuttered light source that emits light continuously, 4. unshuttering said light source and projecting light having a predetermined initial intensity through said mask assembly upon said coating for a predetermined time, 5. then, after a delay following unshuttering, continuously measuring a portion of the light transmitted through said mask and producing a signal which is indicative of the intensity level of said transmitted light, 6. and continuously adjusting said light source in response to said signal to provide a desired total luminous flux incident on said coating.
Claim 3
Dependent Claim
15 words
positioning said aperture mask in said panel in said predetermined position opposite said photosensitive coating,
Claim 4
Dependent Claim
15 words
positioning said aperture mask in said panel in said predetermined position opposite said photosensitive coating,
Claim 5
Dependent Claim
16 words
positioning an aperture mask in said first panel in said predetermined position opposite said photosensitive coating,
Claim 6
Dependent Claim
16 words
positioning an aperture mask in said first panel in said predetermined position opposite said photosensitive coating,
Claim 7
Dependent Claim
18 words
The method of claim 1 wherein said delay is approximately in the range of 0.4 to 2 seconds.
Claim 8
Dependent Claim
10 words
The method of claim 1 including the additional steps of:
Claim 9
Dependent Claim
17 words
positioning said panel assembly on a lighthouse having a normally shuttered light source that emits light continuously,
Claim 10
Dependent Claim
17 words
positioning said panel assembly on a lighthouse having a normally shuttered light source that emits light continuously,
Claim 11
Dependent Claim
18 words
positioning said first panel assembly on a lighthouse having a normally shuttered light source that emits light continuously,
Claim 12
Dependent Claim
18 words
positioning said first panel assembly on a lighthouse having a normally shuttered light source that emits light continuously,
Claim 13
Dependent Claim
25 words
unshuttering said light source and projecting light having a predetermined initial light intensity level, through said mask assembly upon said coating for a predetermined time,
Claim 14
Dependent Claim
25 words
unshuttering said light source and projecting light having a predetermined initial light intensity level, through said mask assembly upon said coating for a predetermined time,
Claim 15
Dependent Claim
23 words
unshuttering said light source and projecting light having a predetermined initial intensity through said mask assembly upon said coating for a predetermined time,
Claim 16
Dependent Claim
23 words
unshuttering said light source and projecting light having a predetermined initial intensity through said mask assembly upon said coating for a predetermined time,
Claim 17
Dependent Claim
47 words
In a method of making a succession of luminescent screen structures for color-television-picture tubes, each tube of the type having a panel assembly comprising a faceplate panel including a viewing window and an aperture mask in a predetermined position spaced from said viewing window, said method comprising:
Claim 18
Dependent Claim
47 words
In a method of making a succession of luminescent screen structures for color-television-picture tubes, each tube of the type having a panel assembly comprising a faceplate panel including a viewing window and an aperture mask in a predetermined position spaced from said viewing window, said method comprising:
Claim 19
Dependent Claim
26 words
The method of claim 4 wherein said initial light level is within one half to three quarters of the average light level during said exposing step.
Claim 20
Dependent Claim
32 words
then, after a delay following unshuttering, continuously measuring a portion of the light transmitted through said mask and producing a signal which is indicative of the intensity level of said transmitted light,
Claim 21
Dependent Claim
32 words
then, after a delay following unshuttering, continuously measuring a portion of the light transmitted through said mask and producing a signal which is indicative of the intensity level of said transmitted light,
Claim 22
Dependent Claim
37 words
then, after a delay following unshuttering of at least 0.4 second, continuously measuring a portion of the light transmitted through said mask and producing a signal which is indicative of the intensity level of said transmitted light,
Claim 23
Dependent Claim
37 words
then, after a delay following unshuttering of at least 0.4 second, continuously measuring a portion of the light transmitted through said mask and producing a signal which is indicative of the intensity level of said transmitted light,
Claim 24
Dependent Claim
21 words
continuouslY adjusting said light source in response to said signal to provide a desired total luminous flux incident on said coating,
Claim 25
Dependent Claim
21 words
continuouslY adjusting said light source in response to said signal to provide a desired total luminous flux incident on said coating,
Claim 26
Dependent Claim
22 words
and continuously adjusting said light source in response to said signal to provide a desired total luminous flux incident on said coating.
Claim 27
Dependent Claim
22 words
and continuously adjusting said light source in response to said signal to provide a desired total luminous flux incident on said coating.
Claim 28
Dependent Claim
11 words
shuttering said light source at the conclusion of said exposure time,
Claim 29
Dependent Claim
11 words
shuttering said light source at the conclusion of said exposure time,
Claim 30
Dependent Claim
15 words
moving a photosensor into position over said panel assembly simultaneously with unshuttering said light source,
Claim 31
Dependent Claim
15 words
moving a photosensor into position over said panel assembly simultaneously with unshuttering said light source,
Claim 32
Dependent Claim
18 words
producing a signal from said photosensor by intercepting a portion of the light transmitted through said viewing window,
Claim 33
Dependent Claim
18 words
producing a signal from said photosensor by intercepting a portion of the light transmitted through said viewing window,
Claim 34
Dependent Claim
10 words
adjusting said light source to said initial light intensity level,
Claim 35
Dependent Claim
10 words
adjusting said light source to said initial light intensity level,
Claim 36
Dependent Claim
9 words
and moving said photosensor away from said panel assembly.
Claim 37
Dependent Claim
9 words
and moving said photosensor away from said panel assembly.
Claim 38
Dependent Claim
7 words
removing said panel assembly from said lighthouse,
Claim 39
Dependent Claim
7 words
removing said panel assembly from said lighthouse,
Claim 40
Dependent Claim
14 words
and repeating each of said foregoing steps for a second of said panel assemblies.
Claim 41
Dependent Claim
14 words
and repeating each of said foregoing steps for a second of said panel assemblies.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |