US3330980A - Shadow mask mounted with bi-metallic sections connected by expansible loop - Google Patents

Shadow mask mounted with bi-metallic sections connected by expansible loop Download PDF

Info

Publication number
US3330980A
US3330980A US472634A US47263465A US3330980A US 3330980 A US3330980 A US 3330980A US 472634 A US472634 A US 472634A US 47263465 A US47263465 A US 47263465A US 3330980 A US3330980 A US 3330980A
Authority
US
United States
Prior art keywords
mask
envelope
screen
electrode
frame
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
US472634A
Other languages
English (en)
Inventor
Terry M Shrader
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RCA Corp
Original Assignee
RCA 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 RCA Corp filed Critical RCA Corp
Priority to US472634A priority Critical patent/US3330980A/en
Priority to GB29057/66A priority patent/GB1139748A/en
Priority to DE19661789183 priority patent/DE1789183C1/de
Priority to FR69313A priority patent/FR1486675A/fr
Priority to DE19661462936 priority patent/DE1462936C3/de
Priority to ES0329099A priority patent/ES329099A1/es
Priority to NL666610027A priority patent/NL144114B/xx
Priority to AT679966A priority patent/AT267622B/de
Priority to SE9715/66A priority patent/SE324383B/xx
Priority to BE684248D priority patent/BE684248A/xx
Priority to AT803067A priority patent/AT278917B/de
Priority to DK370066AA priority patent/DK122917B/da
Publication of US3330980A publication Critical patent/US3330980A/en
Application granted granted Critical
Priority to US00699755A priority patent/US3803436A/en
Priority to DK421570AA priority patent/DK124907B/da
Priority to DE19701762984D priority patent/DE1762984B1/de
Priority to NL717107400A priority patent/NL153371B/xx
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/07—Shadow masks
    • H01J2229/0722—Frame

Definitions

  • the accuracy with which the beam electrons strike the individual elemental screen areas depends, to a great degree, upon the accuracy with which the mask apertures are aligned with the elemental screen areas during the operation of the tube.
  • the resulting mis-alignment of the mask apertures and elemental color areas may cause the beam electrons, or some of them, to impinge upon elemental color areas other than the ones upon which they were intended to impinge.
  • the amount of misalignment (or misregister) of the apertures due to thermal expansion of the mask is small enough in 21" round 70 color kinescopes, such as the RCA 21FBP22A, to be tolerated, so that no temperature compensation is presently used.
  • the problem is more severe in 90 tubes such as the 19EYP22 and 25AP22A, because of the greater deflection and the rectangular shape of the tubes.
  • a rectangular, cold rolled steel masking member is mounted in a rectangular envelope cap by four leaf springs each welded at one end to one side of the mask frame and having a hole at its other end detachably engaging a stud on the envelope cap (to permit removal for successive application of the three sets of different coloremitting phosphor dot areas by the conventional lighthouse procedure).
  • the amount of radial misregister of the electron spots relative to the intended elemental color phosphor dot areas in this tube, due to thermal expansion of the mask during operation, is from 1 to 2 mils on a circle of about 7 inch radius. It has been found that the temperature compensating means heretofore proposed have not been satisfactory in the wider angle rectangular tubes.
  • An object of the present invention is to provide new and improved means for compensating for thermal expansion of an apertured mask of a cathode ray tube.
  • Another object is to provide effective means for maintaining the apertures of a multi-apertured shadow mask in substantial alignment with the elemental color phosphor areas in a color kinescope over the normal range of operating temperature of the tube.
  • a mask electrode within a tube envelope and adjacent to a mosaic screen by means including a base plate of bi-metallic sheet metal comprising two substantially flat mounting sections connected by an expansion loop section, one of the mounting sections being attached to the mask, and an elongated leaf spring having one end connected to the envelope and another end attached to the other mounting section.
  • the leaf spring is detachably connected to the envelope for quick removal and replacement of the mask between successive screening operations during manufacture of the tube.
  • four temperature-compensating mask mounting means are preferably used, each located at or near the mid-point of each side.
  • FIG. 1 is a longitudinal sectional view, taken on line 11 of FIG. 2, of a rectangular, three-beam, tri-color kinescope of the shadow-mask dot-screen variety cont-aining a curved mask mounted in accordance with one embodiment of the present invention
  • FIG. 2 is a sectional view taken on the line 2-2 of FIG. 1;
  • FIG. 3 is an enlarged axial sectional View of one of the mask mounting means of FIG. 1, taken on line 33 of FIG. 5;
  • FIG; 4 is a side view, partly in section, of the mounting means, taken on line 4-4 of FIG. 5;
  • FIG. 5 is a bottom view of FIG. 4;
  • FIG. 6 is a graph showing the radial distortion of the shadow mask electrode with time during warm up of the tube of FIGS. 1-5;
  • FIGS. 7, 8 and 9 are plan, end and side views, respectively, of a modified mounting plate.
  • FIGS. 1 and 2 there is illustrated a shadow-mask color kinescope comprising an evacuated glass envelope 1 having a longitudinal axis X-X which extends through the neck 3 and funnel portion 5 of the envelope.
  • This kinescope is of the socalled masked-target dot-screen variety wherein red, blue and green phosphor dots 6 are arranged in mosaic pattern on the rear or target surface 7 of a glass screen plate 9a which, in the instant case, com prises the front-end or window of the tube.
  • the target surface 7 may be of any desired shape (e.g. circular or rectangular) and curvature (e.g. spherical or cylindrical). In the drawing the target surface 7 is shown to be in the form of a generally rectangular section of a spherical surface.
  • the glass screen plate forms the base portion of a cupshaped envelope cap 9 having a side wall 9b which is sealed to the funnel portion 5.
  • the apertured mask or mask electrode 10 for the mosaic screen 6 comprises a masking member 11 which is preferably constituted of thin (say 4 to 8 mils thick) metal (e.g. copper, nickel, iron or steel) having a positive temperature coefiicient of expansion. Cold-rolled steel is preferably used because of its low cost and strength properties.
  • the masking member may be formed of perforated glass which has been metallized to render one or both of its main surfaces conductive.
  • the masking member 11 is appropriately curved with a contour similar to that of the spherical target surface 7. However, the spacing between the masking member 11 and the target surface 7 may be less at the outer marginal portions of the screen than at the central portions thereof, as in Epstein et al. Patent No.
  • the masking member 11 has a generally rectangular shape similar to but somewhat smaller than the target surface 7 and is formed with a multiplicity of apertures or holes 11a over most of its area.
  • the masking member 11 is provided with "9 an integral, axially-extending peripheral rim portion 11b which is telescoped over and welded at a limited number of points (e.g. twelve) to an axially-extending flange 12a of a generally rectangular metal frame 12, of L-shaped cross-section, preferably made of cold-rolled steel like the masking member 11.
  • the thickness of the two flanges of the mask frame 12 is normally at least ten times that of the member 11, in order to provide adequate support for the latter.
  • the means for mounting the mask in the envelope will be described hereinafter.
  • the beam electrons for activating the different color phosphor areas of the screen 6 are derived from a threebeam electron gun assembly 13 mounted in the neck portion 3, e.g. as in Schroeder Patent 2,595,548.
  • the horizontal and vertical scanning forces required to impart the requisite scanning movements to the three beams from gun assembly 13 are applied simultaneously by a common deflecting yoke 15 which will be understood to comprise two pairs of electromagnetic coils disposed at right angles to each other on the neck 3.
  • the line AA in FIG. 1 indicates the plane of deflection, which is the plane in which the axis of each deflected beam, when extended rearwardly, intersects the axis of origin of that beam. The axial location of the plane of deflection changes somewhat with changes of beam deflection.
  • the two dash-dot lines B indicate the centroid of the three beams from the plane of deflection at the maximum horizontal deflection.
  • the maximum horizontal deflection angle (between lines B) is about 78, and the maximum vertical deflection angle is about 63.
  • the aperturedmask is mounted within the envelope of the tube by at least three, and preferably four (for a rectangular tube), leaf springs welded to the mask frame (or to a hook-plate welded to the frame) and detachably mounted on the envelope by engagement of a hole in the spring with a metal stud embedded in the envelope wall.
  • the conventional arrangement permits radial or outward movement of the mask due to thermal expansion but otherwise holds the mask in a unique position with respect to the mosaic target surface 7.
  • the three different sets of red, green and blue phosphor dots are formed on the screen target surface 7 by the conventional Lighthouse method, using the detachable mask as a stencil for exposing the appropriate portions of layers of photosensitive phosphor material. This process produces a mosaic comprising triads of red, green and blue emitting phosphor dots 6, with the centroid of each triad substantially registered with one of the mask apertures 11a.
  • the screening process does not involve appreciable heating the mask.
  • the masking member 11 and its frame 12 expand, due to the heat produced by electron bombardment, causing color impurity in the 3 color picture on the screen due to misalignment or misregister of the apertures 11a and phosphor dots 6.
  • the mask is mounted by means including leaf springs and bi-metallic members adapted to cause the mask to move toward the screen while expanding outwardly, in response to heat generated by electron bombardment.
  • FIGS. l-4 illustrate one embodiment of the invention, in which the mask frame 12 is detachably mounted on four metal studs 17, embedded or otherwise permanently attached to the inner wall of the envelope cap 9, by four L-shaped leaf springs 19 and four bi-metallic base plates 21.
  • the studs 17, springs 19, and plates 21 are located at or near the midpoints of the sides of the rectangular cap 9a, as shown in FIG. 2.
  • Each spring 19 comprises a base portion or short leg 19a and a long leg 19b.
  • the long leg 19b is bent outwardly at an acute angle from the plane of the base portion 19a, along line 190 as shown in FIG. 5, and formed with a hole 19d, which may be non-circular as shown, to detachably engage the stud 17.
  • Each base plate is formed with two substantially flat mounting sections 21a and 21b integrally connected by an expansion loop or fold section 210 of uniform height above the mounting sections.
  • the upper mounting section, 210 is welded, e.g. at point 23, to the flange 12a of frame 12, with the fold section 21c substantially parallel to the frame, as shown in FIG. 4.
  • the lower part of the base portion 19a of spring 19 is Welded, e.g. at points 25, to the lower mounting section 2112 of the plate 21, with the masking member 11 properly positioned with respect to the screen.
  • the base plate 21 may be formed at one end with a hook 21d adapted to receive an end portion 19:: of spring 19 to hold the spring assembled to the base plate during assembly prior to weld-
  • the materials of the bi-metallic base plate 21 are chosen so that, when heated, the lower end 21b thereof will move inwardly toward the frame 12, in the general direction of the arrows 27 in FIG. 3.
  • the coeflicient of thermal expansion of the metal layer next to the frame must be lower than the coefficient of the other metal layer.
  • the metal layer next to the frame may be of Invar (36% Ni, 64% Fe), which has nearly zero thermal coefiicient, and the other layer may be of a metal having the composition: 22% Ni, 3% Cr, and
  • the bi-metallic plate 21 In the operation of the tube shown in FIGS. 1-4, as the mask electrode .10 heats up, due to electron bombardment, the bi-metallic plate 21 also heats up, by conduction and radiation from the frame 12, and the expansion loop 210 opens up, causing the lower portion 21b and also the attached portion 190 of the spring 19 to move downwardly in the general direction 27. This causes a downward movement of the hole 19d, relative to the frame 12, in the direction of the arrow 29 (FIG. 4). This movement of the hole 19d is amplified by the inclination of the leg 19b With respect to the plane of the base portion 19a.
  • the end result of the movement of the bi-metallic portion 21b relative to the frame is a component of motion of the mask electrode 10 in the opposite direction, i.e. toward the screen, as the mask electrode expands outwardly.
  • the shape of the spring 19 and the thermal coeflicients of the bi-metallic base plate 21 are chosen so that the resultant movement of the mask apertures 11a at the periphery of the mask over the normal operating temperature range of the tube is substantially along the maximum deflection beam path (B in FIG. 1) to minimize misalignment or misregister of the apertures with the intended phosphor dots.
  • FIG. 6 is a graph showing the elfect of the distortion due to expansion of the masking member 11 with time during the first ninety minutes of operation.
  • the ordinate is the radial movement, in mils, of the electron spots, caused by the radial movement of the mask apertures 11a, relative to the phosphor dots of screen 6, at various times after the tube is turned on, as measured at predetermined points on a 25 inch rectangular tube with deflection in a color television receiver.
  • the measurements are made at eight points on a circle of about seven inch radius, at the 12:00 oclock, 1:30, 3:00, etc. positions in FIG. 2.
  • the ordinate of each point on the curves in FIG. 6 is the average of the eight measurements at a particular time.
  • a positive ordinate indicates an outward movement of the electron spots
  • a negative ordinate indicates an inward movement.
  • the dotted curve C shows the average spot distortion during the first ninety minutes of operation of a tube having a mask mounted within the envelope by four conventional leaf springs. Curve C shows a small initial negative distortion of about .35 mil followed by a positive distortion up to about 1.2 mils.
  • the initial negative distortion results from an initial doming of the spherical masking member 11 toward the screen 6 as the thin masking member 11 heats up faster than the thick frame 12 during the first five minutes of operation. After about fifteen minutes of operation, the expansion of the frame 12 overcomes the initial doming of the masking member 11 and produces the subsequent positive distortion of the electron spots.
  • the solid curve D in FIG. 6 shows the average spot distortion at the seven inch radius during the first ninety minutes of operation for a similar tube having the mask mounted by four bi-metallic plates 21 and four leaf springs 19, as shown in FIGS. 1-5.
  • the maximum positive or negative distortion was less than .3 mil, which is well within the .5 mil distortion that can usually be tolerated without producing noticeable color dilution in the viewed picture.
  • the negative portion of the curve beyond about fifty minutes is the result of slight over-compensation, that is, too much movement of the mask toward the screen as it expands radially outwardly.
  • FIGS. 7, 8 and 9 show a modified bi-metallic plate 31, which may be used in place of the plate 21 in FIGS. l-S.
  • the plate 31 is formed with two substantially flat mounting sections 31a and 31b integrally connected by an expansion loop or fold section 31c. Instead of having uniform height (as in FIG. 5), the loop section 31c varies in height from a maximum at one end to substantially zero at the other end, as shown in FIG. 9.
  • the spring 19 is caused to rotate slightly, clockwise in FIG. 4, thus further amplifying the movement of the hole 19d relative to the frame in the direction 29.
  • FIGS. 7-9 also show a modified hook 31d on the plate 31, which is lanced from the mounting section 31b and faces laterally instead of longitudinally of the plate.
  • the bi-metallic base plates 21 and 31 are preferably formed with the grain running across instead of along the elongated plate, in which case it is easier to form the hook 31d than the hook 21d.
  • a cathode ray tube comprising an envelope including a faceplate, a multi-apertured mask electrode, and temperature compensating means mounting said electrode in said envelope in spaced relation to said faceplate, said means comprising:
  • a base plate of bi-metallic sheet metal comprising two mounting sections connected by an expansion loop section, one of said mounting sections being attached to said electrode;
  • a cathode ray tube comprising:
  • a mask electrode extending across said axis between said gun and said screen and located adjacent to said screen, said mask electrode comprising a rigid frame and a masking member mounted across said frame, said masking member containing a multiplicity of apertures through which beam electrons pass along paths toward elemental areas of said screen mosaic which are aligned with said apertures along said paths, said masking member and frame being constituted of materials that expand when subjected to heat generated by electron bombardment;
  • each of said means comprising:
  • a base plate of bi-metallic sheet metal comprising two substantially coplanar mounting sections connected by an expansion loop section, one of said mounting sections being attached to the outer periphery of said frame;
  • an elongated leaf spring having one end connected to said envelope and another end attached to the other of said mounting sections.
  • a rectangular shadow-mask type color kinescope comprising:
  • a rectangular domed shadow-mask electrode having a substantially spherical surface disposed adjacent to said screen in the paths of said beams, said electrode comprising a rigid metal frame and a capshaped metal masking member having an axiallyextending peripheral part telescoped over and welded to said frame, said masking member containing a multiplicity of apertures through which electrons of said three beams pass along paths toward elemental areas of said screen mosaic which are aligned with said apertures along said paths, said masking member and frame being constituted of a metal that expands when subjected to heat generated by electron bombardment; and
  • each of said means comprising:
  • a bi-metallic base plate comprising two substantially co-planar flat sections connected by an expansion loop section, one of said flat sections being welded to the outer periphery of said frame:

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
US472634A 1965-07-16 1965-07-16 Shadow mask mounted with bi-metallic sections connected by expansible loop Expired - Lifetime US3330980A (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
US472634A US3330980A (en) 1965-07-16 1965-07-16 Shadow mask mounted with bi-metallic sections connected by expansible loop
GB29057/66A GB1139748A (en) 1965-07-16 1966-06-28 Colour kinescopes
DE19661789183 DE1789183C1 (de) 1965-07-16 1966-07-13 Kathodenstrahlroehre zur Farbbildwiedergabe
FR69313A FR1486675A (fr) 1965-07-16 1966-07-13 Perfectionnements aux tubes à rayons cathodiques
DE19661462936 DE1462936C3 (de) 1965-07-16 1966-07-13 Kathodenstrahlröhre zur Farbbildwiedergabe
ES0329099A ES329099A1 (es) 1965-07-16 1966-07-14 Un dispositivo de tubo de rayos catodicos.
DK370066AA DK122917B (da) 1965-07-16 1966-07-15 Katodestrålerør.
AT679966A AT267622B (de) 1965-07-16 1966-07-15 Kathodenstrahlröhre
NL666610027A NL144114B (nl) 1965-07-16 1966-07-15 Elektronenstraalbuis.
SE9715/66A SE324383B (enrdf_load_stackoverflow) 1965-07-16 1966-07-15
BE684248D BE684248A (enrdf_load_stackoverflow) 1965-07-16 1966-07-15
AT803067A AT278917B (de) 1965-07-16 1966-07-15 Kathodenstrahlröhre
US00699755A US3803436A (en) 1965-07-16 1967-12-26 Shadow mask mounting assemblies
DK421570AA DK124907B (da) 1965-07-16 1970-08-17 Katodestrålerør med en elektronfølsom mosaikskærm og en maskeelektrode.
DE19701762984D DE1762984B1 (de) 1965-07-16 1970-11-13 Kathodenstrahlroehre zur Farbbildwiedergabe
NL717107400A NL153371B (nl) 1965-07-16 1971-05-28 Elektronenstraalbuis.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US47243665A 1965-07-16 1965-07-16
US472634A US3330980A (en) 1965-07-16 1965-07-16 Shadow mask mounted with bi-metallic sections connected by expansible loop

Publications (1)

Publication Number Publication Date
US3330980A true US3330980A (en) 1967-07-11

Family

ID=27043771

Family Applications (2)

Application Number Title Priority Date Filing Date
US472634A Expired - Lifetime US3330980A (en) 1965-07-16 1965-07-16 Shadow mask mounted with bi-metallic sections connected by expansible loop
US00699755A Expired - Lifetime US3803436A (en) 1965-07-16 1967-12-26 Shadow mask mounting assemblies

Family Applications After (1)

Application Number Title Priority Date Filing Date
US00699755A Expired - Lifetime US3803436A (en) 1965-07-16 1967-12-26 Shadow mask mounting assemblies

Country Status (9)

Country Link
US (2) US3330980A (enrdf_load_stackoverflow)
AT (1) AT278917B (enrdf_load_stackoverflow)
BE (1) BE684248A (enrdf_load_stackoverflow)
DE (1) DE1762984B1 (enrdf_load_stackoverflow)
DK (2) DK122917B (enrdf_load_stackoverflow)
ES (1) ES329099A1 (enrdf_load_stackoverflow)
GB (1) GB1139748A (enrdf_load_stackoverflow)
NL (1) NL144114B (enrdf_load_stackoverflow)
SE (1) SE324383B (enrdf_load_stackoverflow)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3387160A (en) * 1967-01-11 1968-06-04 Nat Video Corp Mounting means for moving shadow mask axially forward upon heating
US3487251A (en) * 1966-11-19 1969-12-30 Philips Corp Parallelogram mounting fixture for shadow mask
US3492522A (en) * 1967-08-15 1970-01-27 Zenith Radio Corp Shadow mask supported by v-shaped springs having apices directed toward gun
US3524096A (en) * 1968-04-24 1970-08-11 Helen C Haas Color cathode ray tube having shadow mask frame formed to accommodate a support system
US3524974A (en) * 1968-08-13 1970-08-18 Sylvania Electric Prod Shadow mask supporting structure having thermal expansion correction means
US3524972A (en) * 1967-10-05 1970-08-18 Nat Video Corp Shadow mask bimetal strip means with motion-limiting bumper
US3573526A (en) * 1968-12-23 1971-04-06 Sylvania Electrics Products In Locating device for temperature compensated parallax barrier supporting system
US3573527A (en) * 1968-02-08 1971-04-06 Gerardus Antonius Hafkenscheid Shadow mask supported by bimetallic spring comprising coplanar strips with different coefficients of expansion
US3600623A (en) * 1970-11-20 1971-08-17 Sylvania Electric Prod Locating device for temperature compensated parallax barrier supporting system
US3600621A (en) * 1970-11-20 1971-08-17 Sylvania Electric Prod Locating device for temperature compensated parallax barrier supporting system
US3600622A (en) * 1970-11-20 1971-08-17 Sylvania Electric Prod Locating device for temperature compensated parallax barrier supporting system
US3639798A (en) * 1970-08-05 1972-02-01 Sylvania Electric Prod Shadow mask support comprising flat, bimetallic element attached to inwardly projecting frame flange
US3700948A (en) * 1970-07-09 1972-10-24 Motorola Inc Edge-bonded bi-metallic strip extending from metal plate on shadow mask to stud via spring of substantially smaller cross-sectional area than strip
US3743878A (en) * 1969-01-08 1973-07-03 Gte Sylvania Inc Parallel barrier supporting system having spring movement limiter
US3896321A (en) * 1973-12-12 1975-07-22 Zenith Radio Corp System for suspending a color selection electrode in a color cathode ray tube
US3935497A (en) * 1968-07-05 1976-01-27 Admiral Corporation Shadow mask thermal compensating assembly
US3943399A (en) * 1973-09-07 1976-03-09 Zenith Radio Corporation Shadow-mask color cathode ray tube with improved mask suspension system
DE2554879A1 (de) * 1974-12-06 1976-06-10 Rca Corp Verfahren zur herstellung eines bildschirmaufbaus fuer eine kathodenstrahlroehre mit temperaturkompensierter maskenbefestigung
US4315189A (en) * 1979-02-14 1982-02-09 Toshiba Corporation Support structure for shadow mask of color cathode ray tube
US4317064A (en) * 1979-10-15 1982-02-23 Zenith Radio Corporation Shadow mask suspension system
US4613785A (en) * 1984-03-29 1986-09-23 Rca Corporation Color picture tube having an improved simplified support structure for a color selection electrode
US5066886A (en) * 1989-10-31 1991-11-19 Carpenter Technology Corporation Thermally responsive article, method of making same, and a device incorporataing said article
US6294864B1 (en) * 1996-09-02 2001-09-25 Hitachi, Ltd. Color cathode-ray tube with shadow mask having L-shaped bi-metallic springs

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL151552B (nl) * 1967-02-02 1976-11-15 Philips Nv Kleurentelevisieweergeefbuis.
US3969648A (en) * 1974-09-03 1976-07-13 Advent Corporation Projection television tube system
GB1546889A (en) * 1975-03-19 1979-05-31 Rca Corp Cathode ray tube having shadow mask
DE2659998C2 (de) * 1975-03-19 1986-12-18 Rca Corp., New York, N.Y. Kathodenstrahlröhre mit gewellter Farbauswahl-Lochmaske
US4164682A (en) * 1976-01-05 1979-08-14 Zenith Radio Corporation Shadow mask suspension system having bracket means integrally formed from the shadow mask assembly
US4367430A (en) * 1979-01-25 1983-01-04 Mitsubishi Denki Kabushiki Kaisha Shadow mask type 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
NL8004173A (nl) * 1980-07-21 1982-02-16 Philips Nv Kleurenbeeldbuis.
US4455505A (en) * 1981-09-04 1984-06-19 Rca Corporation Color picture tube having improved temperature compensating support for a mask-frame assembly
US4437036A (en) 1981-10-23 1984-03-13 Rca Corporation Cathode-ray tube having a temperature compensated 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
US4439709A (en) * 1982-04-29 1984-03-27 Rca Corporation Color picture tube having improved temperature compensating support for a mask-frame assembly
US4467242A (en) * 1982-10-18 1984-08-21 Rca Corporation Color selection electrode mounting structure having an off-set washer
US4528475A (en) * 1983-05-09 1985-07-09 Rca Corporation Color picture tube having spring supports for a mask-frame assembly
US4500767A (en) * 1983-07-27 1985-02-19 Rca Corporation Shadow mask washer/spring welding apparatus
US4572983A (en) * 1984-03-29 1986-02-25 Rca Corporation Color picture tube having an improved support structure for a color selection electrode
KR890004842B1 (ko) * 1985-03-11 1989-11-29 가부시끼가이샤 도시바 컬러 수상관
US4659958A (en) * 1985-09-24 1987-04-21 Rca Corporation Support means for use with a low expansion color-selection electrode
JP2534206B2 (ja) * 1987-12-03 1996-09-11 三菱電機株式会社 シヤドウマスク構体
TW341378U (en) * 1993-09-21 1998-09-21 Thomson Consumer Electronics Color picture tube having improved shadow mask-frame assembly support means
US5557162A (en) * 1995-01-18 1996-09-17 Samsung Display Devices Co., Ltd. Color picture tube with a shadow mask support member
TW348259B (en) * 1995-12-26 1998-12-21 Toshiba Co Ltd Color cathode ray tube
DE19549139A1 (de) * 1995-12-29 1997-07-03 Asea Brown Boveri Verfahren und Apparateanordnung zur Aufwärmung und mehrstufigen Entgasung von Wasser
JPH1186744A (ja) 1997-09-10 1999-03-30 Toshiba Corp カラー陰極線管
JPH11283523A (ja) * 1998-03-31 1999-10-15 Toshiba Corp カラー受像管、該カラー受像管用の弾性支持体及び弾性支持機構
KR100831006B1 (ko) * 2002-07-26 2008-05-20 삼성에스디아이 주식회사 음극선관
GB2552899A (en) * 2015-03-02 2018-02-14 Univ Texas Systems and methods for thermally actuated flow control
WO2020162997A2 (en) 2018-11-09 2020-08-13 Convey Technology, Inc. Pressure and heat conducted energy device and method
WO2020236761A2 (en) 2019-05-16 2020-11-26 Convey Technology, Inc. Proportional-response conductive energy weapon and method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3487251A (en) * 1966-11-19 1969-12-30 Philips Corp Parallelogram mounting fixture for shadow mask
US3387160A (en) * 1967-01-11 1968-06-04 Nat Video Corp Mounting means for moving shadow mask axially forward upon heating
US3492522A (en) * 1967-08-15 1970-01-27 Zenith Radio Corp Shadow mask supported by v-shaped springs having apices directed toward gun
US3524972A (en) * 1967-10-05 1970-08-18 Nat Video Corp Shadow mask bimetal strip means with motion-limiting bumper
US3573527A (en) * 1968-02-08 1971-04-06 Gerardus Antonius Hafkenscheid Shadow mask supported by bimetallic spring comprising coplanar strips with different coefficients of expansion
US3524096A (en) * 1968-04-24 1970-08-11 Helen C Haas Color cathode ray tube having shadow mask frame formed to accommodate a support system
US3935497A (en) * 1968-07-05 1976-01-27 Admiral Corporation Shadow mask thermal compensating assembly
US3524974A (en) * 1968-08-13 1970-08-18 Sylvania Electric Prod Shadow mask supporting structure having thermal expansion correction means
US3524973A (en) * 1968-08-13 1970-08-18 Sylvania Electric Prod Shadow mask supporting structure having thermal expansion correction means
US3573526A (en) * 1968-12-23 1971-04-06 Sylvania Electrics Products In Locating device for temperature compensated parallax barrier supporting system
US3743878A (en) * 1969-01-08 1973-07-03 Gte Sylvania Inc Parallel barrier supporting system having spring movement limiter
US3700948A (en) * 1970-07-09 1972-10-24 Motorola Inc Edge-bonded bi-metallic strip extending from metal plate on shadow mask to stud via spring of substantially smaller cross-sectional area than strip
US3639798A (en) * 1970-08-05 1972-02-01 Sylvania Electric Prod Shadow mask support comprising flat, bimetallic element attached to inwardly projecting frame flange
US3600622A (en) * 1970-11-20 1971-08-17 Sylvania Electric Prod Locating device for temperature compensated parallax barrier supporting system
US3600621A (en) * 1970-11-20 1971-08-17 Sylvania Electric Prod Locating device for temperature compensated parallax barrier supporting system
US3600623A (en) * 1970-11-20 1971-08-17 Sylvania Electric Prod Locating device for temperature compensated parallax barrier supporting system
US3943399A (en) * 1973-09-07 1976-03-09 Zenith Radio Corporation Shadow-mask color cathode ray tube with improved mask suspension system
US3896321A (en) * 1973-12-12 1975-07-22 Zenith Radio Corp System for suspending a color selection electrode in a color cathode ray tube
DE2554879A1 (de) * 1974-12-06 1976-06-10 Rca Corp Verfahren zur herstellung eines bildschirmaufbaus fuer eine kathodenstrahlroehre mit temperaturkompensierter maskenbefestigung
US3970456A (en) * 1974-12-06 1976-07-20 Rca Corporation Method for preparing a viewing-screen structure for a CRT having temperature-compensated mask-mounting means, including cooling mask during exposure
US4315189A (en) * 1979-02-14 1982-02-09 Toshiba Corporation Support structure for shadow mask of color cathode ray tube
US4317064A (en) * 1979-10-15 1982-02-23 Zenith Radio Corporation Shadow mask suspension system
US4613785A (en) * 1984-03-29 1986-09-23 Rca Corporation Color picture tube having an improved simplified support structure for a color selection electrode
US5066886A (en) * 1989-10-31 1991-11-19 Carpenter Technology Corporation Thermally responsive article, method of making same, and a device incorporataing said article
US6294864B1 (en) * 1996-09-02 2001-09-25 Hitachi, Ltd. Color cathode-ray tube with shadow mask having L-shaped bi-metallic springs

Also Published As

Publication number Publication date
DK122917B (da) 1972-04-24
DE1462936A1 (de) 1968-12-12
NL144114B (nl) 1974-11-15
NL6610027A (enrdf_load_stackoverflow) 1967-01-17
SE324383B (enrdf_load_stackoverflow) 1970-06-01
DE1462936B2 (de) 1971-05-19
DK124907B (da) 1972-12-04
US3803436A (en) 1974-04-09
BE684248A (enrdf_load_stackoverflow) 1966-12-16
DE1762984B1 (de) 1971-11-18
ES329099A1 (es) 1967-05-01
GB1139748A (en) 1969-01-15
AT278917B (de) 1970-02-25

Similar Documents

Publication Publication Date Title
US3330980A (en) Shadow mask mounted with bi-metallic sections connected by expansible loop
US2897392A (en) Color television tube mask and frame assembly
US2795719A (en) Color-kinescopes
JPS59167936A (ja) シヤドウマスク組立体の製法
US3878428A (en) Cathode ray tube having shadow mask and screen with tailored heat transfer properties
US3524973A (en) Shadow mask supporting structure having thermal expansion correction means
US2846608A (en) Cathode-ray tube
US3368098A (en) Shadow mask welded to frame at twelve points
CA1283440C (en) Cathode-ray tube having shadow mask for low overscan
US3351996A (en) Method of making a rectangular-mask assembly for a shadow-mask type of color tube
US3601650A (en) Integrated shadow mask structure
US3974416A (en) Multiple electrode support members with low coefficient of expansion
US3898508A (en) Temperature compensated shadow mask for a color cathode-ray tube
US4950943A (en) Support for shadow mask in a cathode ray tube
US4659958A (en) Support means for use with a low expansion color-selection electrode
US3887828A (en) Shadow mask having conductive layer in poor thermal contact with mask
US5932957A (en) Cathode-ray tube having detentioning rod assembly for a tension mask frame
US3349272A (en) Color television tube with shadow mask provided with electron shielding plate coated with heat radiating material
US3468005A (en) Process for improving mask-screen registration in cathode ray tubes
US3639798A (en) Shadow mask support comprising flat, bimetallic element attached to inwardly projecting frame flange
EP0644571B1 (en) Color picture tube having shadow mask-frame assembly support means
US3619689A (en) Cathode-ray tube with electrode supported by straplike springs
EP1306875B1 (en) Tension mask for a cathode-ray-tube
US4455505A (en) Color picture tube having improved temperature compensating support for a mask-frame assembly
US3868532A (en) Shadow mask and overscan shield assembly