CA1062322A - Color tv picture tube with improved contact spring and associated high voltage system - Google Patents
Color tv picture tube with improved contact spring and associated high voltage systemInfo
- Publication number
- CA1062322A CA1062322A CA254,036A CA254036A CA1062322A CA 1062322 A CA1062322 A CA 1062322A CA 254036 A CA254036 A CA 254036A CA 1062322 A CA1062322 A CA 1062322A
- Authority
- CA
- Canada
- Prior art keywords
- stud
- funnel
- faceplate
- electrically conductive
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/06—Screens for shielding; Masks interposed in the electron stream
- H01J29/07—Shadow masks for colour television tubes
- H01J29/073—Mounting arrangements associated with shadow masks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/92—Means forming part of the tube for the purpose of providing electrical connection to it
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
This disclosure depicts a novel device and system for providing an electrical path in a color television picture tube from a funnel anode button to the tube's shadow mask and screen. The electrical path from the anode button to the screen remains complete when the shadow mask is not in position. A
contact spring is clipped to a shadow mask suspension stud, in-stead of to the shadow mask directly, in order to electrically connect the mask and screen to the electrically conductive coating on the inside surface of the funnel.
.
This disclosure depicts a novel device and system for providing an electrical path in a color television picture tube from a funnel anode button to the tube's shadow mask and screen. The electrical path from the anode button to the screen remains complete when the shadow mask is not in position. A
contact spring is clipped to a shadow mask suspension stud, in-stead of to the shadow mask directly, in order to electrically connect the mask and screen to the electrically conductive coating on the inside surface of the funnel.
.
Description
~Of~3~;~
This invention relates in general to color television picture tubes of the shadow mask type, and in particular to a device and system for providing an electrical path between a funnel anode button for the tube and the tube's shadow mask and screen.
This application is related to applicant's U.S.
patents Nos. 3,890,526; 3,896,321 and 3,912,963, issued June 17, 1975, July 22, 1975 and October 14, 1975, respectively; applicant's Canadian patent No. 1,001,207, issued December 7, 1976 and appli-10 cant's co-pending application Serial No. 240,267 filed November 24, 1975.
Conventionally, color television picture tubes comprise a glass bulb including a funnel and a flanged faceplate sealed to the flared end of the funnel, and an electron gun assembly mounted in the funnel neck for providing a source of electrons.
The faceplate has a concave inner surface upon which is deposited an electron-excitable phosphor screen. An aluminum layer is deposited on the back of the phosphor screen. A shadow mask assembly comprising a rigid frame and a perforate steel mask is attached to the faceplate by means of a plurality of spaced leaf springs which engage metal studs embedded in the faceplate inner wall. An electrically conductive coating, which is usually graphite, is applied to the internal surface of the funnel and a high voltage is applied to this coating from an external source through an "anode button" in the funnel wall.
In operation, the shadow ma.sk and the aluminum layer on the screen of a color television picture tube are conven-tionally placed at the same potential as the conductive funnel coating; the
This invention relates in general to color television picture tubes of the shadow mask type, and in particular to a device and system for providing an electrical path between a funnel anode button for the tube and the tube's shadow mask and screen.
This application is related to applicant's U.S.
patents Nos. 3,890,526; 3,896,321 and 3,912,963, issued June 17, 1975, July 22, 1975 and October 14, 1975, respectively; applicant's Canadian patent No. 1,001,207, issued December 7, 1976 and appli-10 cant's co-pending application Serial No. 240,267 filed November 24, 1975.
Conventionally, color television picture tubes comprise a glass bulb including a funnel and a flanged faceplate sealed to the flared end of the funnel, and an electron gun assembly mounted in the funnel neck for providing a source of electrons.
The faceplate has a concave inner surface upon which is deposited an electron-excitable phosphor screen. An aluminum layer is deposited on the back of the phosphor screen. A shadow mask assembly comprising a rigid frame and a perforate steel mask is attached to the faceplate by means of a plurality of spaced leaf springs which engage metal studs embedded in the faceplate inner wall. An electrically conductive coating, which is usually graphite, is applied to the internal surface of the funnel and a high voltage is applied to this coating from an external source through an "anode button" in the funnel wall.
In operation, the shadow ma.sk and the aluminum layer on the screen of a color television picture tube are conven-tionally placed at the same potential as the conductive funnel coating; the
-2-,. ,~, ' ~c/
. ' ~
1~623Z;~
mask is typically electrically connected directly to the coating.
In most prior art systems the electrical path is established between the funnel coating and the mask by one or more contact springs which are clipped or fastened directly to the shadow mask frame and which extend to the conductive coating when the funnel and faceplate are assembled, establishing electrical contact there-with. Electrical contact is established between the mask-and the screen through the leaf springs which support the mask assembly, the mask-supporting studs, and a conductive "moustache" painted between the studs and the aluminum layer (or the "black surround"
coating in a matrix-type tube). It is important to note that in most prior art systems the electrical path from the conductive funnel coating to the screen is through the shadow mask assembly and exists only when the shadow mask is in its operative location.
Contact springs of this type are disclosed in the Barr patent, Patent No. 3,541,373, and the Levin et al patent, Patent No.
. ' ~
1~623Z;~
mask is typically electrically connected directly to the coating.
In most prior art systems the electrical path is established between the funnel coating and the mask by one or more contact springs which are clipped or fastened directly to the shadow mask frame and which extend to the conductive coating when the funnel and faceplate are assembled, establishing electrical contact there-with. Electrical contact is established between the mask-and the screen through the leaf springs which support the mask assembly, the mask-supporting studs, and a conductive "moustache" painted between the studs and the aluminum layer (or the "black surround"
coating in a matrix-type tube). It is important to note that in most prior art systems the electrical path from the conductive funnel coating to the screen is through the shadow mask assembly and exists only when the shadow mask is in its operative location.
Contact springs of this type are disclosed in the Barr patent, Patent No. 3,541,373, and the Levin et al patent, Patent No.
3,377,493.
A connective means between the funnel and screen for use in a cathode ray ~ube of the post-deflection structure is disclosed in the Davis et al patents, Patent No. 3,876,898 and 3,876,899. The disclosed connective means bridges the frit seal and connects the screen to a second anode button in the funnel so that the screen may be established at a different potential than a color selection electrode, which is next to the screen.
This invention has general applicability but is most advantageously applied in a color television picture tube of a ~ novel type described and claimed in the referent copending ap-- plications. Those applications disclose a non-self-rigid shadowmask which is suspended on studs located in the faceplate. The 1 30 non-self-rigid shadow mask is preferably frameless. It has been ¦ found to be impractical to clip a contact spring directly to such ~ a mask since restorative forces in the spring create the pos-.,:
sibility of deforming the mask. ~lso, welding a contact spring to a non-self-rigid shadow mask is an undesirable method of spring attachment for the reason that the mask is very fragile and easily deformed. Further, weld "splashes" are apt to result in clogging the mask apertures.
Objects of the Invention It is an object of the present invention to provide in a color cathode ray tube of the shadow mask type improved sturcture for creating a direct electrical path between the funnel coating and the screen, which path is independent of the shadow mask.
It is another object of the present invention to provide structure for establishing an electrical path between the conductive funnel coating and the shadow mask whick does not require attaching contact springs directly to the mask, and thus which avoids any possibility of deforming or weld-fouling the mask.
The invention relates to an electrically conductive contact spring for use with a color television picture tube having a faceplate with an electron excitable phosphor screen applied to an inner surface thereof and an electri-cally conductive layer disposed on the back of the phosphor screen and with at least one electrically conductive shadow mask support stud which projects from the faceplate inner surface and which is in electrical contact with the electrically conductive layer, the tube also having a glass -funnel with an electrically conductive funnel coating applied to an inner surface thereof and with an anode button through a wall of the glass funnel and in electrical contact l 30 with the electrically conductive funnel coating. The ;
mb/~t ~ ~
., .
.
electrically conductive contact spring comprises: a sleeve-like base for making slideable frictional engagement with the stud on the faceplate; and a spring member extending from the base for resiliently contacting the funnel coating when the funnel and faceplate are assembled.
Brief Description of the Drawings The features of the present invention which are believed to be novel are set forth with particularity in the appended claims. The invention, together with further objects and advantages thereof, may best be understood by reference to the following description taken in conjunction with the accom-panying drawings, in the several figures of which like reference numerals identify like elements, and in which:
Figure 1 is a schematic perspective view of a color cathode ray tube embodying the present invention;
Figure 2 is a schematic fragmentary side sectional view -4a-~c/
- - ~ : '`
of the Figure 1 tube showing the electrical path from an anode button on a glass funnel to an electrically conductive layer on a faceplate;
Figure 3 is an enlarged, fragmentary, partially sectioned side view of the Figure 1 tube, showing a novel contact spring constituting an aspect of this invention and illustrating how the contact spring resiliently contacts an electrical~y conductive coating on the funnel;
Figure 4 is an exploded perspective view of the Figures 1-3 tube, showing hidden features of the faceplate and glass funnel; and Figures 5 and 6 are showing enlarged perspective views of the contact spring clipped to a shadow mask-suspension stud.
Description of the Preferred Embodiment 15 Whereas the invention may be implemented in color cathode ray tubes of various types, it is preferably embodied in a tube of the nature shown in Figures 1-3. The tube 2 il-lustrated in Figures 1-3 is shown as having a novel envelope comprising a funnel 4 sealed to a flangeless faceplate 6. The novel construction of the faceplate 6 without a flange permits economies in manufacture of the envelope and simplified and economical screening processes.
I On the inner surface of the faceplate 6 is disposed a phosphor screen 7. Whereas the screen 7 may take any of a wide variety of other configurations such as the conventional dot screen . I configuration, in the illustrated embodiment it is shown as comprising an array of vertically oriented, horizontally repeating triads of red-emissive, blue-emissive and green-emissive phosphor elements, 8R, 8B and 8G. The screen is preferably of the negative ~ 30 guardband, black matrix-type as taught to the world in a patent to j Fiore et al, 3,146,368. A black grille 10 comprises, in this ;,"'"' . `-~
` ~0623Z~
embodiment, a pattern of light-absorptive bands separating the phosphor elements 8R, 8B, 8G. A thin layer 11 of electrically conductive material such as aluminum disposed over the phosphors 8R, 8B, 8G and black grille 10 serves to conduct away electrons which would otherwise charge the screen, and acts as a mirror to reflect phosphor-emitted light to the viewer.
The funnel 4 has an electrically conductive funnel coating 5 (typically a graphite composition) which is applied to the internal surface thereof. In operation of the tube, a high voltage is applied to this coating 5 from an external source through an anode button 3 in the funnel wall and to the elec-trically conductive layer 11 on the screen (in a way to be des-cribed). A field-free region is thus established in the interior of the funnel 4.
A shadow mask 12 of novel construction, described below, has formed therein a pattern of apertures 14. Whereas aperture patterns of other types may be employed, the mask 12 is shown as having an aperture pattern of the so-called "slot"-type in which the apertures 14 have the form of rectangular slots arranged in vertically oriented rows, each slot in a row being separated from its neighboring slots by a "tie bar" 16.
The shadow mask construction is not the subject of this invention, being described and claimed specifically in the referent Canadian patent No. 1,001,207 and U.S. patent No.
3,912,963. Briefly, the shadow mask 12 is preferably of a frame-less, one-piece construction formed from a single sheet of elec-trically conductive material such as steel. An integral skirt 18 provides rigidity for the mask and shields the screen 7 from stray and overscanned electrons. Integrally formed ribs 22, channel 20 and edge lip 24 cause the mask 12 to be relatively stiff with respect to the major and minor axes thereof, while permitting the mask to flex with respect to its diagonals and thereby conform, ~9 ~c/~L' .
106232~
when mounted, to twist deviations in the contour of the faceplate.
A suspension system of novel construction is provided for supporting the shadow mask 12 in spaced adjacency to the inner surface of the faceplate 6. The suspension system shown is not the subject of this application, being described and claimed in referent U.S. patent Nos. 3,890,526 and 3,896,321 and co-pending application Serial No. 240,267.
The suspension system preferably comprises four sus-pension devices 26, one at each corner of the mask 12. As noted, the shadow mask 12 is constructed so as to be relatively rigid with respect to its major and minor axes, but less rigid with respect to its diagonals. By mounting the suspension devices 26 at the corners of the mask 12, unit-to-unit deviations in the faceplate with respect to the faceplate diagonals are followed by corresponding flexure of the shadow mask 12 so as to maintain a constant "Q" spacing, i.e., a constant spacing between the central apertured portion of the shadow mask 12 and the inner surface of the faceplate 6 carrying the phosphor screen 7.
Although numerous other arrangements are contemplated, in the illustrated preferred suspension system, the suspension devices 26 each comprise a bracket 28 moun~ed on a corner of the mask which carries a leaf spring 30 which is relatively weak, but laterally stiff (in its own plane and in torsion). me spring has an "X" corrugation embossed in its face to increase the spring rate, however, the spring 30 may be provided without the corruga-tion. The spring 30 carries on its distal end a lug 32 which is received within a lug-receiving opening 34 in a ~C/"~ '~
~0~i232;~
faceplate-mo~nted stud 36 when the mnsk 12 is mounted in its operative position on the faceplate 6. Alternatively, the lug 32 may be formed integrally with the spring 30.
The bracket 28 has embossed therein stiffening corrugations and, if thermal compensation is necessary, may be made of a side-bonded bimetal so constructed and configured that when the mask 12 heats and expands due to electron bombard-ment, the bracket 28 deflects and brings the shadow mask closer to the phosphor screen by an amount necessary and sufficient to compensate for the mask expansion.
The stud 36 (illustrated in Figures 5 and 6) has a channel shape with a face 40 containing the lug-receiving opening 34 and two legs 42, 44 with a shoulder 41. The two legs 42, 44 are embedded in (or may be cemented to) the faceplate 6. The spaced legs 42, 44 permit screening fluids suffused across the faceplate to pass through the stud 36 without clogging it.
The lug-receiving openings 34 in three of the four studs 36 are circular or triangular and define the location of the mask 12 relative to the faceplate 6. The lug-receiving opening 34 in the redundant fourth stud 36 is preferably elongated in a direction parallel to the inner surface of the faceplate 6, permitting the fourth lug to seek an equilibrium position and preventing disturb-ance of the mask position which is determined by the other ; three studs 36. To insert or remove the mask 12, the springs 30 are depressed until the lugs 32 clear the lug-receiving openings 34 in the studs 36.
As shown in Figure 1, the tube 2 has a neck 46 within which is contained an electron gun assembly. The electron gun assembly may take any of a variety of con-structions, but in the illustrated embodiment wherein the mask is a slot mask cooperating with a screen of the mb/ ~ - 8 -"line"-type, wherein three separate guns 54, 56, 58 ~enerate three coplanar beams 60, 62, 64 intended to mb/~ f - 8a -10f~23Z;~
carry, respectively, red-associated, blue-associated and green-associated color video information. The electron gun assembly is electrically accessed through pins 66 in the base 68 of the tube.
A contact spring 9 constituting an essential aspect of this invention provides for an electrical path from one of the studs 36 to the funnel coating 5. In accordance with an aspect of this invention, the contact spring 9 provides for the establishment of a direct electrical path from the anode button 3 to the electrically conductive layer 11 on screen 7. The contact spring 9 and its associated system aspects are at the heart of the invention and will be described in detail below.
The present invention in its various aspects will now be described in detail.
The invention is significantly useful with a color television picture tube 2 having a flangeless faceplate 6 with an electron excitable phosphor screen 7 applied to the inner surface ¦ of the faceplate 7 and also having a glass funnel 4 with an anode button 3 through a wall of the glass funnel 4 (see Figures 2 and 3). An electrically conductive layer 11 is disposed on the back of the phosphor screen 7 and an electrically conductive stud 36, which is in electrical contact with the conductive layer 11, pro-. . .
jects from the inner surface of the faceplate 6. An electrically ! conductive funnel coating 5 is disposed on an inner surface of the i glass funnel 4 and establishes electrical contact with the anode button 3. An electrically conductive contact spring 9 establisheselectrical contact between the stud 36 and the funnel coa~ing 5 and completes a direct electrical path from the anode button 3 to the conductive layer 11.
¦ Figure 2 schematically illustrates the direct electrical 1 30 path from the anode button 3 and funnel coating 5 to the electrically¦ conductive layer 11 on the phosphor screen 7. The conductive layer ',~
,,~ g 11 is placed in electrical contact with the particular stud (or studs) 36 carrying contact spring 9 by either causing the layer ll to be extended into contact with the stud 36, or by painting on the faceplate inner surface an electrically conductive bridge between the stud and the layer 11. The contact spring 9 is clipped over this stud`36 and extends from the stud 36 to resiliently contact the funnel coating 5 when the funnel 4 and faceplate 6 are joined.
The shadow mask 12 is electrically and mechanically connected to the stud 36 and derives a potential from the direct electrical path from the anode button 3 to the conductive layer 11 when the tube 2 is operating. This potential is substantially equal to the potential on the electrically conductive layer 11 on the screen 7. It is to be stressed that the contact spring 9 establishes an electrical path for the phosphor screen 7 and also for the shadow mask 12. However, the phosphor screen 7 and the conductive layer 11 are at the same potential as the funnel- coating 5 irrespective of whether the shadow mask 12 is in position or not.
Figure 3 shows a detailed view of the contact spring 9 in an assembled tube. The electrically conductive layer 11 which is applied over the phosphor screen 7 can be seen to be in contact with stud 36. Shadow mask 12 is suspended by suspension device 26 including stud 36. The mask 12, when mounted, derives the potential applied at the anode button 3 by the electrical path in-cluding the funnel coating 5, contact spring 9 and stud 36.
Referring now also to Figures 4-6, the contact spring 9 has a sleeve-like base 48 with a rectangular cross-sectional configuration for making slideable frictional engagement with stud 36 and therefore is in intimate.electrical contact with stud 36.
The base 48 is slightly larger than stud 36 to provide for outside telescoping engagement of the base 48 with the stud 36. Alter-' natively, inside telescoping engagement could be accomplished with ' 10~;23;~;~
slight modifications of the stud 36 and tlle base 48. In addition, a spring member 50 extends from the base 48 for resiliently contacting the conductive funnel coating 5 which is disposed on the inner surface of the glass funnel
A connective means between the funnel and screen for use in a cathode ray ~ube of the post-deflection structure is disclosed in the Davis et al patents, Patent No. 3,876,898 and 3,876,899. The disclosed connective means bridges the frit seal and connects the screen to a second anode button in the funnel so that the screen may be established at a different potential than a color selection electrode, which is next to the screen.
This invention has general applicability but is most advantageously applied in a color television picture tube of a ~ novel type described and claimed in the referent copending ap-- plications. Those applications disclose a non-self-rigid shadowmask which is suspended on studs located in the faceplate. The 1 30 non-self-rigid shadow mask is preferably frameless. It has been ¦ found to be impractical to clip a contact spring directly to such ~ a mask since restorative forces in the spring create the pos-.,:
sibility of deforming the mask. ~lso, welding a contact spring to a non-self-rigid shadow mask is an undesirable method of spring attachment for the reason that the mask is very fragile and easily deformed. Further, weld "splashes" are apt to result in clogging the mask apertures.
Objects of the Invention It is an object of the present invention to provide in a color cathode ray tube of the shadow mask type improved sturcture for creating a direct electrical path between the funnel coating and the screen, which path is independent of the shadow mask.
It is another object of the present invention to provide structure for establishing an electrical path between the conductive funnel coating and the shadow mask whick does not require attaching contact springs directly to the mask, and thus which avoids any possibility of deforming or weld-fouling the mask.
The invention relates to an electrically conductive contact spring for use with a color television picture tube having a faceplate with an electron excitable phosphor screen applied to an inner surface thereof and an electri-cally conductive layer disposed on the back of the phosphor screen and with at least one electrically conductive shadow mask support stud which projects from the faceplate inner surface and which is in electrical contact with the electrically conductive layer, the tube also having a glass -funnel with an electrically conductive funnel coating applied to an inner surface thereof and with an anode button through a wall of the glass funnel and in electrical contact l 30 with the electrically conductive funnel coating. The ;
mb/~t ~ ~
., .
.
electrically conductive contact spring comprises: a sleeve-like base for making slideable frictional engagement with the stud on the faceplate; and a spring member extending from the base for resiliently contacting the funnel coating when the funnel and faceplate are assembled.
Brief Description of the Drawings The features of the present invention which are believed to be novel are set forth with particularity in the appended claims. The invention, together with further objects and advantages thereof, may best be understood by reference to the following description taken in conjunction with the accom-panying drawings, in the several figures of which like reference numerals identify like elements, and in which:
Figure 1 is a schematic perspective view of a color cathode ray tube embodying the present invention;
Figure 2 is a schematic fragmentary side sectional view -4a-~c/
- - ~ : '`
of the Figure 1 tube showing the electrical path from an anode button on a glass funnel to an electrically conductive layer on a faceplate;
Figure 3 is an enlarged, fragmentary, partially sectioned side view of the Figure 1 tube, showing a novel contact spring constituting an aspect of this invention and illustrating how the contact spring resiliently contacts an electrical~y conductive coating on the funnel;
Figure 4 is an exploded perspective view of the Figures 1-3 tube, showing hidden features of the faceplate and glass funnel; and Figures 5 and 6 are showing enlarged perspective views of the contact spring clipped to a shadow mask-suspension stud.
Description of the Preferred Embodiment 15 Whereas the invention may be implemented in color cathode ray tubes of various types, it is preferably embodied in a tube of the nature shown in Figures 1-3. The tube 2 il-lustrated in Figures 1-3 is shown as having a novel envelope comprising a funnel 4 sealed to a flangeless faceplate 6. The novel construction of the faceplate 6 without a flange permits economies in manufacture of the envelope and simplified and economical screening processes.
I On the inner surface of the faceplate 6 is disposed a phosphor screen 7. Whereas the screen 7 may take any of a wide variety of other configurations such as the conventional dot screen . I configuration, in the illustrated embodiment it is shown as comprising an array of vertically oriented, horizontally repeating triads of red-emissive, blue-emissive and green-emissive phosphor elements, 8R, 8B and 8G. The screen is preferably of the negative ~ 30 guardband, black matrix-type as taught to the world in a patent to j Fiore et al, 3,146,368. A black grille 10 comprises, in this ;,"'"' . `-~
` ~0623Z~
embodiment, a pattern of light-absorptive bands separating the phosphor elements 8R, 8B, 8G. A thin layer 11 of electrically conductive material such as aluminum disposed over the phosphors 8R, 8B, 8G and black grille 10 serves to conduct away electrons which would otherwise charge the screen, and acts as a mirror to reflect phosphor-emitted light to the viewer.
The funnel 4 has an electrically conductive funnel coating 5 (typically a graphite composition) which is applied to the internal surface thereof. In operation of the tube, a high voltage is applied to this coating 5 from an external source through an anode button 3 in the funnel wall and to the elec-trically conductive layer 11 on the screen (in a way to be des-cribed). A field-free region is thus established in the interior of the funnel 4.
A shadow mask 12 of novel construction, described below, has formed therein a pattern of apertures 14. Whereas aperture patterns of other types may be employed, the mask 12 is shown as having an aperture pattern of the so-called "slot"-type in which the apertures 14 have the form of rectangular slots arranged in vertically oriented rows, each slot in a row being separated from its neighboring slots by a "tie bar" 16.
The shadow mask construction is not the subject of this invention, being described and claimed specifically in the referent Canadian patent No. 1,001,207 and U.S. patent No.
3,912,963. Briefly, the shadow mask 12 is preferably of a frame-less, one-piece construction formed from a single sheet of elec-trically conductive material such as steel. An integral skirt 18 provides rigidity for the mask and shields the screen 7 from stray and overscanned electrons. Integrally formed ribs 22, channel 20 and edge lip 24 cause the mask 12 to be relatively stiff with respect to the major and minor axes thereof, while permitting the mask to flex with respect to its diagonals and thereby conform, ~9 ~c/~L' .
106232~
when mounted, to twist deviations in the contour of the faceplate.
A suspension system of novel construction is provided for supporting the shadow mask 12 in spaced adjacency to the inner surface of the faceplate 6. The suspension system shown is not the subject of this application, being described and claimed in referent U.S. patent Nos. 3,890,526 and 3,896,321 and co-pending application Serial No. 240,267.
The suspension system preferably comprises four sus-pension devices 26, one at each corner of the mask 12. As noted, the shadow mask 12 is constructed so as to be relatively rigid with respect to its major and minor axes, but less rigid with respect to its diagonals. By mounting the suspension devices 26 at the corners of the mask 12, unit-to-unit deviations in the faceplate with respect to the faceplate diagonals are followed by corresponding flexure of the shadow mask 12 so as to maintain a constant "Q" spacing, i.e., a constant spacing between the central apertured portion of the shadow mask 12 and the inner surface of the faceplate 6 carrying the phosphor screen 7.
Although numerous other arrangements are contemplated, in the illustrated preferred suspension system, the suspension devices 26 each comprise a bracket 28 moun~ed on a corner of the mask which carries a leaf spring 30 which is relatively weak, but laterally stiff (in its own plane and in torsion). me spring has an "X" corrugation embossed in its face to increase the spring rate, however, the spring 30 may be provided without the corruga-tion. The spring 30 carries on its distal end a lug 32 which is received within a lug-receiving opening 34 in a ~C/"~ '~
~0~i232;~
faceplate-mo~nted stud 36 when the mnsk 12 is mounted in its operative position on the faceplate 6. Alternatively, the lug 32 may be formed integrally with the spring 30.
The bracket 28 has embossed therein stiffening corrugations and, if thermal compensation is necessary, may be made of a side-bonded bimetal so constructed and configured that when the mask 12 heats and expands due to electron bombard-ment, the bracket 28 deflects and brings the shadow mask closer to the phosphor screen by an amount necessary and sufficient to compensate for the mask expansion.
The stud 36 (illustrated in Figures 5 and 6) has a channel shape with a face 40 containing the lug-receiving opening 34 and two legs 42, 44 with a shoulder 41. The two legs 42, 44 are embedded in (or may be cemented to) the faceplate 6. The spaced legs 42, 44 permit screening fluids suffused across the faceplate to pass through the stud 36 without clogging it.
The lug-receiving openings 34 in three of the four studs 36 are circular or triangular and define the location of the mask 12 relative to the faceplate 6. The lug-receiving opening 34 in the redundant fourth stud 36 is preferably elongated in a direction parallel to the inner surface of the faceplate 6, permitting the fourth lug to seek an equilibrium position and preventing disturb-ance of the mask position which is determined by the other ; three studs 36. To insert or remove the mask 12, the springs 30 are depressed until the lugs 32 clear the lug-receiving openings 34 in the studs 36.
As shown in Figure 1, the tube 2 has a neck 46 within which is contained an electron gun assembly. The electron gun assembly may take any of a variety of con-structions, but in the illustrated embodiment wherein the mask is a slot mask cooperating with a screen of the mb/ ~ - 8 -"line"-type, wherein three separate guns 54, 56, 58 ~enerate three coplanar beams 60, 62, 64 intended to mb/~ f - 8a -10f~23Z;~
carry, respectively, red-associated, blue-associated and green-associated color video information. The electron gun assembly is electrically accessed through pins 66 in the base 68 of the tube.
A contact spring 9 constituting an essential aspect of this invention provides for an electrical path from one of the studs 36 to the funnel coating 5. In accordance with an aspect of this invention, the contact spring 9 provides for the establishment of a direct electrical path from the anode button 3 to the electrically conductive layer 11 on screen 7. The contact spring 9 and its associated system aspects are at the heart of the invention and will be described in detail below.
The present invention in its various aspects will now be described in detail.
The invention is significantly useful with a color television picture tube 2 having a flangeless faceplate 6 with an electron excitable phosphor screen 7 applied to the inner surface ¦ of the faceplate 7 and also having a glass funnel 4 with an anode button 3 through a wall of the glass funnel 4 (see Figures 2 and 3). An electrically conductive layer 11 is disposed on the back of the phosphor screen 7 and an electrically conductive stud 36, which is in electrical contact with the conductive layer 11, pro-. . .
jects from the inner surface of the faceplate 6. An electrically ! conductive funnel coating 5 is disposed on an inner surface of the i glass funnel 4 and establishes electrical contact with the anode button 3. An electrically conductive contact spring 9 establisheselectrical contact between the stud 36 and the funnel coa~ing 5 and completes a direct electrical path from the anode button 3 to the conductive layer 11.
¦ Figure 2 schematically illustrates the direct electrical 1 30 path from the anode button 3 and funnel coating 5 to the electrically¦ conductive layer 11 on the phosphor screen 7. The conductive layer ',~
,,~ g 11 is placed in electrical contact with the particular stud (or studs) 36 carrying contact spring 9 by either causing the layer ll to be extended into contact with the stud 36, or by painting on the faceplate inner surface an electrically conductive bridge between the stud and the layer 11. The contact spring 9 is clipped over this stud`36 and extends from the stud 36 to resiliently contact the funnel coating 5 when the funnel 4 and faceplate 6 are joined.
The shadow mask 12 is electrically and mechanically connected to the stud 36 and derives a potential from the direct electrical path from the anode button 3 to the conductive layer 11 when the tube 2 is operating. This potential is substantially equal to the potential on the electrically conductive layer 11 on the screen 7. It is to be stressed that the contact spring 9 establishes an electrical path for the phosphor screen 7 and also for the shadow mask 12. However, the phosphor screen 7 and the conductive layer 11 are at the same potential as the funnel- coating 5 irrespective of whether the shadow mask 12 is in position or not.
Figure 3 shows a detailed view of the contact spring 9 in an assembled tube. The electrically conductive layer 11 which is applied over the phosphor screen 7 can be seen to be in contact with stud 36. Shadow mask 12 is suspended by suspension device 26 including stud 36. The mask 12, when mounted, derives the potential applied at the anode button 3 by the electrical path in-cluding the funnel coating 5, contact spring 9 and stud 36.
Referring now also to Figures 4-6, the contact spring 9 has a sleeve-like base 48 with a rectangular cross-sectional configuration for making slideable frictional engagement with stud 36 and therefore is in intimate.electrical contact with stud 36.
The base 48 is slightly larger than stud 36 to provide for outside telescoping engagement of the base 48 with the stud 36. Alter-' natively, inside telescoping engagement could be accomplished with ' 10~;23;~;~
slight modifications of the stud 36 and tlle base 48. In addition, a spring member 50 extends from the base 48 for resiliently contacting the conductive funnel coating 5 which is disposed on the inner surface of the glass funnel
4 when the funnel 4 and faceplate 6 are joined. Spring member 50 is preferably bifurcated to provide better current carrying capability. The bifurcation also provides for bet-ter flexibility of the contact spring 9. The contact spring 9 is preferably made of stainless steel.
Figure 4 is a perspective view showing how the faceplate and the glass funnel are assembled. Contact spring 9 is shown clipped to one of the studs 36. The free end 49 of the contact spring 9 is preferably shaped in the form of a cup, so that when the faceplate 6 is assembled with the funnel 4, the cupped end 49 will ride along the inner glass surface of the funnel 4 to its final location.
The cupped end 49 prevents scratching of the conductive funnel coating 5. As can be seen in Figure 4, three corners of the glass funnel 4 have notches 39 for receiving studs 36 to align the faceplate 6 and the funnel 4 during assembly.
One corner 37 of the glass funnel 4 does not have a notch 39 for the corresponding stud 36. During assembly, therefore, the contact spring 9 can slide along the inside surface of the funnel 4 unobstructed.
Figures 5-6 shows the contact spring 9 clipped to the stud 36. The contact spring 9 preferably has a locking tab 51 attached to the sleeve-like base 48 for clipping over a shoulder 41 on the stud 36, thereby preventing the contact spring 9 from sliding off of the stud 36.
The contact spring 9 also preferably has stop tabs 52 attached to the base 48 for preventing the contact spring 9 from sliding all the way down on stud 36 and for establish-ing a predetermined location for the contact spring 9 on the stud 36. The mb/
i 106Z32Z
combination of the stop tabs 52 and the locking tab 51 prevent the contact spring 9 from having any movement relative to the stud 36, thereby locking the contact spring 9 into position thereon.
It should be emphasized that a shadow mask of the type shown in this application and referred to, can be inserted or removed from studs 36 irrespective of whether the contact spring 9 is clipped over one of the studs 36. In other words, the contact spring 9 is independent of the shadow mask 12.
The invention is not limited to ~he particular details of construction of the embodiment depicted and other modifications and applications are contemplated. Certain changes may be made in the above-described apparatus without departing from the true spirit and scope of the invention herein involved. For example, the contact spring 9 may have other configurations with or without stop or locking tabs. The base 48 and member 50 may have other shapes adapting the spring for use with studs of other configurations and with tubes having envelopes of other constructions. More than one contact spring may be employed. It is intended, therefore, that the subject matter in the above depiction shall be interpreted as illustrative and not in a limiting sense.
. .
SU~'PI}MII~TAI~Y ~ISCIOSI)I~I.
_ _ _ _ _ In further e~lbodiments of this invention the contact spring has an end which is welded to the shadow mask-suspension stud. These embodiments will be described in greater detail with reference to the sheet of drawings containing Figures 7 through 9 in which:
Figures 7 and 8 are enlarged perspective views of an alternative emhodiment of the present invention showing a contact spring with a sleeve-like base welded to a shadow mask-suspension stud; and Figure 9 is an enlarged perspective view of anotheralternative embodiment showing a contact spring welded to a shadow mask-suspension stud.
The alternative embodiment of a contact spring is shown in Figures 7-8. An electrically conductive contact spring 71 has a first end 73 mechanically and electrically affixed to ; stud 75. The first end 73 is here illustrated as comprising a sleeve-like base and has a rectangular cross-sectional configura-tion substantially matching the cross-sectional configuration of 2~ the stud 75, but is slightly larger to provide for outside tele-scoping engagement of the first end 73 with the stud 75. The : flrst end 73 is welded to the stud 75 at weld points 77.
; The contact spring 71 extends from the stud 75 such that lts opposed end 79 makes resilient contact with the funnel coating when the funnel and faceplate are assembled. As previously explained in detail, the contact spring, in an assembled tube, completes a mask-bypassing electrical path from the anode button 28 to the conductive layer on the faceplate.
.
_ Jvb/ ~
. . . .. . .... ..... . . .... . . . . . .
,:
~ .
106232~
As before mentiolled, Lhe invclltlon is not limited to the particular details of construction of the embodiment depicted and other modifications and applications are contemplated.
For example, Figure 9 shows an electrically conducti,ve contact spring 61 having a first end 63 mechanically and electrically affixed (such as by welding at weld points 65) to a stud 67. The opposed end 69 of the spring makes resilient contact with the funnel coating when the funnel and faceplate are assembled, and thereby completes a mask-bypassing electrical path from the anode button to the conductive layer on the faceplate.
Certain other changes may be made in the above-described apparatus without departing from the true spirit and scope of the invention herein involved. It is intended, therefore, that the subject matter in the above depiction shall be interpreted as illustrative and not in a limiting sense.
-r-.
~ 14 ~
Jv~
Figure 4 is a perspective view showing how the faceplate and the glass funnel are assembled. Contact spring 9 is shown clipped to one of the studs 36. The free end 49 of the contact spring 9 is preferably shaped in the form of a cup, so that when the faceplate 6 is assembled with the funnel 4, the cupped end 49 will ride along the inner glass surface of the funnel 4 to its final location.
The cupped end 49 prevents scratching of the conductive funnel coating 5. As can be seen in Figure 4, three corners of the glass funnel 4 have notches 39 for receiving studs 36 to align the faceplate 6 and the funnel 4 during assembly.
One corner 37 of the glass funnel 4 does not have a notch 39 for the corresponding stud 36. During assembly, therefore, the contact spring 9 can slide along the inside surface of the funnel 4 unobstructed.
Figures 5-6 shows the contact spring 9 clipped to the stud 36. The contact spring 9 preferably has a locking tab 51 attached to the sleeve-like base 48 for clipping over a shoulder 41 on the stud 36, thereby preventing the contact spring 9 from sliding off of the stud 36.
The contact spring 9 also preferably has stop tabs 52 attached to the base 48 for preventing the contact spring 9 from sliding all the way down on stud 36 and for establish-ing a predetermined location for the contact spring 9 on the stud 36. The mb/
i 106Z32Z
combination of the stop tabs 52 and the locking tab 51 prevent the contact spring 9 from having any movement relative to the stud 36, thereby locking the contact spring 9 into position thereon.
It should be emphasized that a shadow mask of the type shown in this application and referred to, can be inserted or removed from studs 36 irrespective of whether the contact spring 9 is clipped over one of the studs 36. In other words, the contact spring 9 is independent of the shadow mask 12.
The invention is not limited to ~he particular details of construction of the embodiment depicted and other modifications and applications are contemplated. Certain changes may be made in the above-described apparatus without departing from the true spirit and scope of the invention herein involved. For example, the contact spring 9 may have other configurations with or without stop or locking tabs. The base 48 and member 50 may have other shapes adapting the spring for use with studs of other configurations and with tubes having envelopes of other constructions. More than one contact spring may be employed. It is intended, therefore, that the subject matter in the above depiction shall be interpreted as illustrative and not in a limiting sense.
. .
SU~'PI}MII~TAI~Y ~ISCIOSI)I~I.
_ _ _ _ _ In further e~lbodiments of this invention the contact spring has an end which is welded to the shadow mask-suspension stud. These embodiments will be described in greater detail with reference to the sheet of drawings containing Figures 7 through 9 in which:
Figures 7 and 8 are enlarged perspective views of an alternative emhodiment of the present invention showing a contact spring with a sleeve-like base welded to a shadow mask-suspension stud; and Figure 9 is an enlarged perspective view of anotheralternative embodiment showing a contact spring welded to a shadow mask-suspension stud.
The alternative embodiment of a contact spring is shown in Figures 7-8. An electrically conductive contact spring 71 has a first end 73 mechanically and electrically affixed to ; stud 75. The first end 73 is here illustrated as comprising a sleeve-like base and has a rectangular cross-sectional configura-tion substantially matching the cross-sectional configuration of 2~ the stud 75, but is slightly larger to provide for outside tele-scoping engagement of the first end 73 with the stud 75. The : flrst end 73 is welded to the stud 75 at weld points 77.
; The contact spring 71 extends from the stud 75 such that lts opposed end 79 makes resilient contact with the funnel coating when the funnel and faceplate are assembled. As previously explained in detail, the contact spring, in an assembled tube, completes a mask-bypassing electrical path from the anode button 28 to the conductive layer on the faceplate.
.
_ Jvb/ ~
. . . .. . .... ..... . . .... . . . . . .
,:
~ .
106232~
As before mentiolled, Lhe invclltlon is not limited to the particular details of construction of the embodiment depicted and other modifications and applications are contemplated.
For example, Figure 9 shows an electrically conducti,ve contact spring 61 having a first end 63 mechanically and electrically affixed (such as by welding at weld points 65) to a stud 67. The opposed end 69 of the spring makes resilient contact with the funnel coating when the funnel and faceplate are assembled, and thereby completes a mask-bypassing electrical path from the anode button to the conductive layer on the faceplate.
Certain other changes may be made in the above-described apparatus without departing from the true spirit and scope of the invention herein involved. It is intended, therefore, that the subject matter in the above depiction shall be interpreted as illustrative and not in a limiting sense.
-r-.
~ 14 ~
Jv~
Claims (11)
1. An electrically conductive contact spring for use with a color television picture tube having a faceplate with an electron excitable phosphor screen applied to an inner surface thereof and an electrically conductive layer disposed on the back of the phosphor screen and with at least one electrically conductive shadow mask support stud which projects from the face-plate inner surface and which is in electrical contact with the electrically conductive layer, the tube also having a glass funnel with an electrically conductive funnel coating applied to an inner surface thereof and with an anode button through a wall of the glass funnel and in electrical contact with the electrically conductive funnel coating, said electrically conductive contact spring comprising:
a sleeve-like base for making slideable frictional engagement with the stud on the faceplate; and a spring member extending from said base for resiliently contacting the funnel coating when the funnel and faceplate are assembled.
a sleeve-like base for making slideable frictional engagement with the stud on the faceplate; and a spring member extending from said base for resiliently contacting the funnel coating when the funnel and faceplate are assembled.
2. The contact spring defined by claim 1 for use with a stud having a rectangular cross-sectional configuration wherein said sleeve-like base has a rectangular cross-sectional configuration substantially matching the cross-sectional con-figuration of the stud, but slightly larger to provide for outside telescoping engagement of said base with the stud.
3. For use with a color television picture tube having a faceplate with an electron excitable phosphor screen applied to an inner surface thereof and an electrically conductive layer disposed on the back of the phosphor screen, the tube also having a glass funnel with an electrical conductive funnel coating applied to an inner surface thereof and with an anode button through a wall of the glass funnel and in contact with the electrically conductive funnel coating, the combination comprising:
an electrically conductive stud which projects from the faceplate inner surface for supporting a shadow mask adjacent the faceplate inner surface; and a contact spring comprising:
a sleeve-like base for making outside slideable frictional engagement with said stud on the faceplate, and a spring member extending from said base for resiliently contacting the funnel coating when the funnel and faceplate are assembled.
an electrically conductive stud which projects from the faceplate inner surface for supporting a shadow mask adjacent the faceplate inner surface; and a contact spring comprising:
a sleeve-like base for making outside slideable frictional engagement with said stud on the faceplate, and a spring member extending from said base for resiliently contacting the funnel coating when the funnel and faceplate are assembled.
4. For use with a color television picture tube having a faceplate with an electron-excitable phosphor screen applied to an inner surface thereof and also having a glass funnel with an anode button through a wall of the glass funnel, the combination comprising:
an electrically conductive layer disposed on the back of the phosphor screen;
an electrically conductive stud which is in electrical contact with said conductive layer and which projects from the faceplate inner surface;
an electrically conductive funnel coating disposed on an inner surface of the glass funnel which establishes electrical contact with the anode button; and an electrically conductive contact spring for establishing electrical contact between said stud and said funnel coating, comprising:
a sleeve-like base for making slideable frictional engagement with said stud on the faceplate, and a spring member extending from said base for resiliently contacting the funnel coating when the funnel and faceplate are assembled such that a direct electrical path is formed between the anode button and said electrically con-ductive layer.
an electrically conductive layer disposed on the back of the phosphor screen;
an electrically conductive stud which is in electrical contact with said conductive layer and which projects from the faceplate inner surface;
an electrically conductive funnel coating disposed on an inner surface of the glass funnel which establishes electrical contact with the anode button; and an electrically conductive contact spring for establishing electrical contact between said stud and said funnel coating, comprising:
a sleeve-like base for making slideable frictional engagement with said stud on the faceplate, and a spring member extending from said base for resiliently contacting the funnel coating when the funnel and faceplate are assembled such that a direct electrical path is formed between the anode button and said electrically con-ductive layer.
5. The combination defined by claim 4 wherein said stud has a rectangular cross-sectional configuration wherein said sleeve-like base has a rectangular cross-sectional configuration substantially matching the cross-sectional configuration of the stud, but slightly larger to provide for outside telescoping engagement of said base with the stud.
6. For use with a shadow mask type color television picture tube having a faceplate with an electron-excitable phosphor screen applied to an inner surface thereof and also having a glass funnel with an anode button through a wall of the glass funnel, the combination comprising:
an electrically conductive layer disposed on the back of the phosphor screen;
an electrically conductive stud which is in electrical contact with said conductive layer and which projects from the faceplate inner surface;
an electrically conductive funnel coating disposed on an inner surface of the glass funnel which establishes electrical contact with the anode button;
an electrically conductive contact spring for establishing electrical contact between said stud and said funnel coating, comprising:
a sleeve-like base for making slideable frictional engagement with said stud on the faceplate; and a spring member extending from said base for resiliently contacting the funnel coating when the funnel and faceplate are assembled such that a direct electrical path is formed between the anode button and said electrically conductive layer; and a shadow mask electrically and mechanically connected to said stud, thereby deriving a potential when the tube is operating which is substantially equal to the potential on said electrically conductive layer on said screen.
an electrically conductive layer disposed on the back of the phosphor screen;
an electrically conductive stud which is in electrical contact with said conductive layer and which projects from the faceplate inner surface;
an electrically conductive funnel coating disposed on an inner surface of the glass funnel which establishes electrical contact with the anode button;
an electrically conductive contact spring for establishing electrical contact between said stud and said funnel coating, comprising:
a sleeve-like base for making slideable frictional engagement with said stud on the faceplate; and a spring member extending from said base for resiliently contacting the funnel coating when the funnel and faceplate are assembled such that a direct electrical path is formed between the anode button and said electrically conductive layer; and a shadow mask electrically and mechanically connected to said stud, thereby deriving a potential when the tube is operating which is substantially equal to the potential on said electrically conductive layer on said screen.
7. The combination defined by claim 6 wherein said stud has a rectangular cross-sectional configuration wherein said sleeve-like base has a rectangular cross-sectional configuration substantially matching the cross-sectional configuration of the stud, but slightly larger to provide for outside telescoping engagement of said base with the stud.
8. For use with a color television picture tube having a faceplate with an electron-excitable phosphor screen applied to an inner surface thereof and an electrically con-ductive layer disposed on the back of the phosphor screen, the tube also having a glass funnel with an electrically conductive funnel coating applied to an inner surface thereof and with an anode button through a wall of the glass funnel and in contact with the electrically conductive funnel coating, the combination comprising:
an electrically conductive stud which is in electrical contact with said conductive layer and which projects from the faceplate inner surface for supporting a shadow mask adjacent the faceplate inner surface; and an electrically conductive contact spring having a first end mechanically and electrically affixed to said stud on the faceplate, said spring extending from said stud such that its opposed end makes resilient contact with the funnel coating when the funnel and faceplate are assembled and thereby completes a mask-bypassing electrical path from the anode button to the con-ductive layer of the faceplate.
9. For use with a shadow mask type color television picture tube having a faceplate with an electron-excitable phosphor screen applied to an inner surface thereof and also having a glass funnel with an anode button through a wall of the glass funnel, the combination comprising:
an electrically conductive layer disposed on the back of the phosphor screen;
an electrically conductive stud which is in electrical contact with said conductive layer and which projects from the faceplate inner surface;
an electrically conductive stud which is in electrical contact with said conductive layer and which projects from the faceplate inner surface for supporting a shadow mask adjacent the faceplate inner surface; and an electrically conductive contact spring having a first end mechanically and electrically affixed to said stud on the faceplate, said spring extending from said stud such that its opposed end makes resilient contact with the funnel coating when the funnel and faceplate are assembled and thereby completes a mask-bypassing electrical path from the anode button to the con-ductive layer of the faceplate.
9. For use with a shadow mask type color television picture tube having a faceplate with an electron-excitable phosphor screen applied to an inner surface thereof and also having a glass funnel with an anode button through a wall of the glass funnel, the combination comprising:
an electrically conductive layer disposed on the back of the phosphor screen;
an electrically conductive stud which is in electrical contact with said conductive layer and which projects from the faceplate inner surface;
claim 9 continued.....
an electrically conductive funnel coating disposed on an inner surface of the glass funnel which establishes electrical contact with the anode button;
an electrically conductive contact spring having a first end mechanically and electrically affixed to said stud on the faceplate, said spring extending from said stud such that its opposed end makes resilient contact with the funnel coating when the funnel and faceplate are assembled, and thereby completes a mask-bypassing electrical path from the anode button to the conductive layer on the faceplate; and a shadow mask electrically and mechanically connected to said stud, thereby deriving a potential when the tube is operating which is substantially equal to the potential on said electrically conductive layer on said screen.
CLAIMS SUPPORTED BY THE SUPPLEMENTARY DISCLOSURE
an electrically conductive funnel coating disposed on an inner surface of the glass funnel which establishes electrical contact with the anode button;
an electrically conductive contact spring having a first end mechanically and electrically affixed to said stud on the faceplate, said spring extending from said stud such that its opposed end makes resilient contact with the funnel coating when the funnel and faceplate are assembled, and thereby completes a mask-bypassing electrical path from the anode button to the conductive layer on the faceplate; and a shadow mask electrically and mechanically connected to said stud, thereby deriving a potential when the tube is operating which is substantially equal to the potential on said electrically conductive layer on said screen.
CLAIMS SUPPORTED BY THE SUPPLEMENTARY DISCLOSURE
10. The combination defined by claim 8 wherein said first end is welded to said stud.
11. The combination defined by claim 9 wherein said first end is welded to said stud.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US58455675A | 1975-06-06 | 1975-06-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1062322A true CA1062322A (en) | 1979-09-11 |
Family
ID=24337813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA254,036A Expired CA1062322A (en) | 1975-06-06 | 1976-06-03 | Color tv picture tube with improved contact spring and associated high voltage system |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5210670A (en) |
| CA (1) | CA1062322A (en) |
| DE (1) | DE2625905A1 (en) |
| FR (1) | FR2313766A1 (en) |
| GB (1) | GB1503865A (en) |
| NL (1) | NL7606011A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6324615Y2 (en) * | 1980-04-30 | 1988-07-06 | ||
| JPS5998560U (en) * | 1982-12-22 | 1984-07-04 | ソニー株式会社 | color cathode ray tube |
| NL8701031A (en) * | 1987-05-01 | 1988-12-01 | Philips Nv | CATHED BEAM TUBE. |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA925480A (en) * | 1969-09-25 | 1973-05-01 | Glolok Co. Ltd. | Automatic loading, arranging and dispensing device for articles and including containers, pouches and the like |
| CA1001207A (en) * | 1972-09-05 | 1976-12-07 | Zenith Radio Corporation | Face panel assembly for a color cathode-ray tube |
-
1976
- 1976-06-01 GB GB2264376A patent/GB1503865A/en not_active Expired
- 1976-06-03 CA CA254,036A patent/CA1062322A/en not_active Expired
- 1976-06-03 NL NL7606011A patent/NL7606011A/en not_active Application Discontinuation
- 1976-06-04 DE DE19762625905 patent/DE2625905A1/en active Pending
- 1976-06-04 FR FR7616992A patent/FR2313766A1/en active Granted
- 1976-06-07 JP JP6637276A patent/JPS5210670A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| NL7606011A (en) | 1976-12-08 |
| JPS5210670A (en) | 1977-01-27 |
| DE2625905A1 (en) | 1976-12-16 |
| FR2313766A1 (en) | 1976-12-31 |
| FR2313766B3 (en) | 1979-02-23 |
| GB1503865A (en) | 1978-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4045701A (en) | Shadow mask supported by cathode ray tube faceplate | |
| US4595857A (en) | Tension mask color cathode ray tube apparatus | |
| US4467242A (en) | Color selection electrode mounting structure having an off-set washer | |
| US5982085A (en) | Color cathode ray tube with improved shadow mask mounting system | |
| CA1062322A (en) | Color tv picture tube with improved contact spring and associated high voltage system | |
| CA1199361A (en) | Crt comprising metallized glass beads for suppressing arcing therein | |
| US4614896A (en) | Getter and contact assembly for a cathode ray tube | |
| US4028580A (en) | Shadow mask mount and funnel-faceplate referencing system for color CRT | |
| US4866334A (en) | CRT faceplate front assembly with rigidized tension mask support structure | |
| US3038096A (en) | Color television tube | |
| US4164682A (en) | Shadow mask suspension system having bracket means integrally formed from the shadow mask assembly | |
| US4333033A (en) | Anode contact spring and method thereof for color cathode ray picture tubes | |
| JPH0660822A (en) | Cathod-ray tube | |
| US4876477A (en) | Color television display tube | |
| EP1121703B1 (en) | Color picture tube having a tension focus mask | |
| US6133683A (en) | Color cathode ray tube having an internal voltage divider | |
| US4614892A (en) | Tension mask mounting structure | |
| US5202606A (en) | Cathode-ray tube with focussing structure and getter means | |
| US6130501A (en) | Shadow mask mounting arrangement for color CRT | |
| US6294872B1 (en) | Cathode ray tube | |
| TW428196B (en) | A shadow mask type color cathode ray tube having a shadow mask with curls thereof reduced | |
| US6130499A (en) | Cathode ray tube having an improved cathode structure | |
| KR100223839B1 (en) | Cathode supporter in electron gun for color braun tube | |
| EP0333421B1 (en) | Cathode ray tubes | |
| US6144148A (en) | Thermal expansion for color CRT |