US3529199A - Shadow mask having elements bridging corners of integral,longitudinally-extending portions - Google Patents

Shadow mask having elements bridging corners of integral,longitudinally-extending portions Download PDF

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Publication number
US3529199A
US3529199A US731930A US3529199DA US3529199A US 3529199 A US3529199 A US 3529199A US 731930 A US731930 A US 731930A US 3529199D A US3529199D A US 3529199DA US 3529199 A US3529199 A US 3529199A
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US
United States
Prior art keywords
mask
corners
integral
shadow mask
longitudinally
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 - Lifetime
Application number
US731930A
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English (en)
Inventor
Jan Hendrik Duistermaat
Johannes Driedijk
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US Philips Corp
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US Philips Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
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Publication of US3529199A publication Critical patent/US3529199A/en
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    • 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
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/07—Shadow masks
    • H01J2229/0727—Aperture plate
    • H01J2229/0766—Details of skirt or border
    • H01J2229/0772—Apertures, cut-outs, depressions, or the like

Definitions

  • the invention relates to a color television display cathode-ray tube provided with a shadow mask which has a protruding edge and is secured in the tube immediately in front of the display screen by means of resilient suspension members arranged in the proximity of the corners of the mask and extending substantially along the axis of the tube.
  • the invention more particularly relates to such a tube in which the suspension members are shaped and arranged so that when the mask electrode is heated, a correction of the position of the apertures of this electrode relative to the color elements of the display screen is obtained.
  • the suspension members used each have the form of a resilient strip and are located in the same plane as the tube axis but are at an angle of approximately 45 to said tube axis.
  • An expansion of the mask then involves a pivotal movement of the suspension members about their supporting points on the. glass wall so that the mask is slightly moved towards the display screen.
  • each of the suspension members is prefera-bly secured to an auxiliary member which bridges the corner of the mask.
  • an auxiliary member which bridges the corner of the mask.
  • the suspension member and the auxiliary member are entirely located within the part of the corner of the mask which is not struck by the electron beams.
  • FIG. 1 is a sectional view of a corner of a window and mask with a securing member of known construction
  • FIGS. 2 and 3 are similar sectional views of two embodiments according to the invention.
  • FIG. 4 is a plan view of a corner of a window and mask as shown in FIG. 3.
  • reference numeral 1 denotes a glass window to the inner side of which is applied a luminescent screen 10.
  • a shadow mask 2 provided with a protruding edge with flange 3 is arranged in the tube.
  • the space between the edge of the mask and the edge of the window accommodates a resilient member 4 which is located in the same plane as the tube axis and is at an angle of ap proximately 45 to said tube axis.
  • the resilient strip 4 pivots about the supporting point 5 at which the strip 4 bears on a cam of the window 1 so that the mask is moved towards the screen 10.
  • the strip 4 can be only very short and is therefore rigid so that difliculties are involved in inserting the mask into and removing it from the window 1 several times during the manufacture of the screen 10.
  • FIG. 2 avoids these difficulties in that the resilient strip 4 is bent around the edge with flange 3 of the mask 2 and has a comparatively long resilient part which is at an angle of 45 to the tube axis.
  • the end of the strip 4 is secured to an auxiliary member 6.
  • This auxiliary member preferably bridges the corner of the mask, as is shown in FIG. 4, so that the mask electrode is considerably strengthened.
  • the auxiliary member and the suspension member are entirely located within the part of the corner of the mask which is not struck by the electron beams 11.
  • the resilient strip 4 is provided at one end with a pin 9 which is clamped in a recess 8 of a thickened part 7 of the. glass wall of the window 1.
  • the pin is centered in the recess 8 by means of a conical upper end and is fixed afterwards in the correct position when the cone is secured on the window, preferably by means of a readily melting kind of glass, as is common practice for color display tubes.
  • suspension members may also be shaped differently without departing from the scope of the invention.
  • one end of the strip 4 may be bent so that it constitutes the auxiliary member 6.
  • a cathode ray tube for the display of color television images comprising, an envelope having a display screen, of the triad, phosphor dot type, a rectangular shadow mask in front of and spaced from the screen, said mask having a peripheral integral portion substantially parallel to the longitudinal axis of said tube and a support member bridging each of the corners of said portion at points remote from the peripheral edge, and a resilient strip connecting each of said support members to a pin in said envelope wall, said strip comprising a portion extending from said pin substantially perpendicular to said longitudinal axis at least as far as said mask, and a connecting portion extending toward said support member at an angle of approximately 45 with said axis whereby expansion of said mask upon heating pivots said resilient members about said pins and moves said mask toward said screen.

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)
  • Ink Jet (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
US731930A 1967-06-30 1968-05-24 Shadow mask having elements bridging corners of integral,longitudinally-extending portions Expired - Lifetime US3529199A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6709114A NL6709114A (fr) 1967-06-30 1967-06-30

Publications (1)

Publication Number Publication Date
US3529199A true US3529199A (en) 1970-09-15

Family

ID=19800588

Family Applications (1)

Application Number Title Priority Date Filing Date
US731930A Expired - Lifetime US3529199A (en) 1967-06-30 1968-05-24 Shadow mask having elements bridging corners of integral,longitudinally-extending portions

Country Status (10)

Country Link
US (1) US3529199A (fr)
AT (1) AT278111B (fr)
BE (1) BE717386A (fr)
CH (1) CH484509A (fr)
DE (1) DE1762224C3 (fr)
ES (1) ES355601A1 (fr)
FI (1) FI54660C (fr)
FR (1) FR1571238A (fr)
GB (1) GB1172334A (fr)
NL (1) NL6709114A (fr)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3700949A (en) * 1971-01-21 1972-10-24 Nippon Electric Co Color television picture tube
US3943399A (en) * 1973-09-07 1976-03-09 Zenith Radio Corporation Shadow-mask color cathode ray tube with improved mask suspension system
US4100451A (en) * 1974-08-19 1978-07-11 Zenith Radio Corporation Face panel assembly for a color cathode ray tube
US4300071A (en) * 1979-12-10 1981-11-10 Zenith Radio Corporation Four-corner shadow mask suspension system for television cathode ray tubes
US4439709A (en) * 1982-04-29 1984-03-27 Rca Corporation Color picture tube having improved temperature compensating support for a mask-frame assembly
US4460843A (en) * 1982-04-29 1984-07-17 Rca Corporation Color picture tube having improved temperature compensating support for a mask-frame assembly
EP0195357A2 (fr) * 1985-03-11 1986-09-24 Kabushiki Kaisha Toshiba Tube image couleur
US4723088A (en) * 1985-03-29 1988-02-02 Kabushiki Kaisha Toshiba Support members for the mask frame of a CRT
US4728853A (en) * 1985-06-27 1988-03-01 Kabushiki Kaisha Toshiba Color picture tube with support arrangement for a rectangular shadow mask
US4804880A (en) * 1986-04-15 1989-02-14 Rank Brimar Limited Mounting for shadow mask in color cathode ray tubes
US4939412A (en) * 1988-03-30 1990-07-03 Rca Licensing Corporation Color picture tube having improved shadow mask-frame assembly
US4950941A (en) * 1989-07-21 1990-08-21 Rca Licensing Corporation Color picture tube having improved shadow mask-frame assembly support
US5012154A (en) * 1989-12-01 1991-04-30 Rca Licensing Corporation Color picture tube having improved shadow mask-frame assembly support
US5063325A (en) * 1990-03-16 1991-11-05 Thomson Consumer Electronics Inc. Color picture tube having improved shadow mask-frame assembly support
US5128585A (en) * 1990-03-16 1992-07-07 Thomson Consumer Electronics, Inc. Color picture tube having improved corner support for a shadow mask-frame assembly
US5247224A (en) * 1990-12-29 1993-09-21 Samsung Electron Devices Co., Ltd. Color cathode ray tube shadow mask assembly
US5274301A (en) * 1987-01-27 1993-12-28 Kabushiki Kaisha Toshiba Color cathode ray tube panel with shadow mask supports
US5416380A (en) * 1992-04-27 1995-05-16 Sony Corporation Color selection mechanism for cathode ray tube and arm member for the same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI71211C (fi) * 1977-06-22 1986-11-24 Hitachi Ltd Haollanordning foer en skuggmask i ett faergkatodstraoleroer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2755405A (en) * 1953-10-15 1956-07-17 Rca Corp Color television tube
US2846608A (en) * 1954-09-14 1958-08-05 Rca Corp Cathode-ray tube
US2951179A (en) * 1956-05-28 1960-08-30 Gen Electric Electron shield for post acceleration cathode ray tube
US3435268A (en) * 1966-08-19 1969-03-25 Gen Electric In-line plural beam cathode ray tube with an aspherical aperture mask

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2755405A (en) * 1953-10-15 1956-07-17 Rca Corp Color television tube
US2846608A (en) * 1954-09-14 1958-08-05 Rca Corp Cathode-ray tube
US2951179A (en) * 1956-05-28 1960-08-30 Gen Electric Electron shield for post acceleration cathode ray tube
US3435268A (en) * 1966-08-19 1969-03-25 Gen Electric In-line plural beam cathode ray tube with an aspherical aperture mask

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3700949A (en) * 1971-01-21 1972-10-24 Nippon Electric Co Color television picture tube
US3943399A (en) * 1973-09-07 1976-03-09 Zenith Radio Corporation Shadow-mask color cathode ray tube with improved mask suspension system
US4100451A (en) * 1974-08-19 1978-07-11 Zenith Radio Corporation Face panel assembly for a color cathode ray tube
US4300071A (en) * 1979-12-10 1981-11-10 Zenith Radio Corporation Four-corner shadow mask suspension system for television cathode ray tubes
US4439709A (en) * 1982-04-29 1984-03-27 Rca Corporation Color picture tube having improved temperature compensating support for a mask-frame assembly
US4460843A (en) * 1982-04-29 1984-07-17 Rca Corporation Color picture tube having improved temperature compensating support for a mask-frame assembly
EP0195357A3 (en) * 1985-03-11 1988-10-12 Kabushiki Kaisha Toshiba Color cathode ray tube
EP0195357A2 (fr) * 1985-03-11 1986-09-24 Kabushiki Kaisha Toshiba Tube image couleur
US4652792A (en) * 1985-03-11 1987-03-24 Kabushiki Kaisha Toshiba Color cathode ray tube with resilient shadow mask support
US4723088A (en) * 1985-03-29 1988-02-02 Kabushiki Kaisha Toshiba Support members for the mask frame of a CRT
US4728853A (en) * 1985-06-27 1988-03-01 Kabushiki Kaisha Toshiba Color picture tube with support arrangement for a rectangular shadow mask
US4804880A (en) * 1986-04-15 1989-02-14 Rank Brimar Limited Mounting for shadow mask in color cathode ray tubes
US5274301A (en) * 1987-01-27 1993-12-28 Kabushiki Kaisha Toshiba Color cathode ray tube panel with shadow mask supports
US4939412A (en) * 1988-03-30 1990-07-03 Rca Licensing Corporation Color picture tube having improved shadow mask-frame assembly
US4950941A (en) * 1989-07-21 1990-08-21 Rca Licensing Corporation Color picture tube having improved shadow mask-frame assembly support
US5012154A (en) * 1989-12-01 1991-04-30 Rca Licensing Corporation Color picture tube having improved shadow mask-frame assembly support
US5063325A (en) * 1990-03-16 1991-11-05 Thomson Consumer Electronics Inc. Color picture tube having improved shadow mask-frame assembly support
US5128585A (en) * 1990-03-16 1992-07-07 Thomson Consumer Electronics, Inc. Color picture tube having improved corner support for a shadow mask-frame assembly
US5247224A (en) * 1990-12-29 1993-09-21 Samsung Electron Devices Co., Ltd. Color cathode ray tube shadow mask assembly
US5416380A (en) * 1992-04-27 1995-05-16 Sony Corporation Color selection mechanism for cathode ray tube and arm member for the same

Also Published As

Publication number Publication date
FI54660C (fi) 1979-01-10
DE1762224C3 (de) 1978-03-02
NL6709114A (fr) 1968-12-31
FI54660B (fi) 1978-09-29
BE717386A (fr) 1968-12-30
ES355601A1 (es) 1970-01-01
DE1762224A1 (de) 1970-08-13
DE1762224B2 (de) 1977-06-30
FR1571238A (fr) 1969-06-13
AT278111B (de) 1970-01-26
GB1172334A (en) 1969-11-26
CH484509A (de) 1970-01-15

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