US3821583A - Color tube having funnel shield attached to shadow mask frame - Google Patents

Color tube having funnel shield attached to shadow mask frame Download PDF

Info

Publication number
US3821583A
US3821583A US00160300A US16030071A US3821583A US 3821583 A US3821583 A US 3821583A US 00160300 A US00160300 A US 00160300A US 16030071 A US16030071 A US 16030071A US 3821583 A US3821583 A US 3821583A
Authority
US
United States
Prior art keywords
funnel
frame
tube
openings
shielding
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
US00160300A
Other languages
English (en)
Inventor
K Steiner
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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
Priority claimed from DE19702033558 external-priority patent/DE2033558C/de
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Application granted granted Critical
Publication of US3821583A publication Critical patent/US3821583A/en
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

Definitions

  • H0lj 29/06, H01 j 31/20, H0 1 j 29/08 ing funnel configured for'reception within the conical
  • Field of Search 313/85 S, 8-2 B, 92 PD, portion support means attached to said tube for sup- 313/64 porting the funnel within the conical portion, and fastening means attached to the funnel for releasably [56] References Cited connecting the funnel to the support means.
  • the present invention relates to a color television picture tube including a glass vacuum vessel tube having a front screen portion, a glass conical portion and a neck portion, and a ferromagnetic shielding funnel disposed within the conical portion.
  • a vacuum vessel glass tube which includes a front screen portion having a peripheral flange extending therefrom and a conical portion having a neck portion extending from one end thereof.
  • the flange of the front screen portion is attached to the other end of the conical portion as by soldering.
  • Within the vacuum vessel are an apertured color mask and a shielding funnel with the shielding funnel received within the concial portion while the color mask is received within the front screen portion.
  • the shielding funnel is releasably fastened to supporting structure which in turn is connected to the glass tube.
  • the shielding funnel is releasabl fastened to the conical portion of the tube.
  • the shielding funnel is releasably fastened to the color mask frame.
  • the shielding funnel is releasably fastened to the color mask frame fastening structure.
  • a significant advantage of the color television picture tube according to the present invention is that the shielding funnel can be fastened to the interior of the tube a short time before the tube is assembled.
  • the shielding funnel need not be present during the fabricatio'n of the luminescent screen so that the frequent illumination processes required for the production of the luminescent screen are not interfered with.
  • the damage and deformation of the apertured color mask which have been known to occur in the rigidly fastened funnels, are substantially eliminated. It is further advantageous that with a defec-' tive tube it is possible to retrieve the shielding funnel as well asthe apertured color mask without damaging either the funnel or the mask.
  • FIG. 1 is a cross-sectional view of one embodiment of the color television picture tube of the present invention showing the shielding funnel to have resilient tongues for engaging the projections of the concial portion.
  • FIG. 1a is a plan view of the embodiment shown in FIG. 1.
  • FIG. 2 is a cross-sectional view of another embodiment of the color television picture tube of the present invention showing recesses in the shielding funnel which receive therein the projections of the conical portion.
  • FIG. 2a is a plan view of the embodiment shown in FIG. 2.
  • FIG. 3 is a cross-sectional view of a modification of the funnel fastening arrangement shown in FIG. 2.
  • FIG. 4 is a partial cross-sectional view of another embodiment of the color television picture tube of the present invention showing the shielding funnel fastened to the frame of the apertured color mask by a resilient clamp.
  • FIG. 5 is a partial cross-sectional view of another embodiment of the color television picture tube of the present invention showing the shielding funnel fastened to the frame of apertured color mask by a resilient tongue.
  • FIG. 6 is a partial cross-sectional view of another embodiment of the color television picture tube of the present invention showing the shielding funnel to have a flange which cooperates with a resilient clip to fasten the funnel to the frame of the apertured color mask.
  • FIG. 6a is a partial side view of the embodiment shown in FIG. 6 showing further details of the resilient clip.
  • FIG. 7 is a partial cross-sectional view of another embodiment of the color television picture tube of the present invention showing the shielding funnel to have a flange which cooperates with another embodiment of a resilient clip to fasten the funnel to the frame of the apertured color mask.
  • FIG. 7a is a partial side view of the embodiment shown in FIG. 7 showing further details of the resilient clip.
  • FIG. 8 is a partial cross-sectional view of another embodiment of the color television picture tube of the present invention showing the shielding funnel to have resilient tongues which engage the projections of the front panel.
  • FIG. 1 shows a cross-sectional view of a color television picture tube whose vacuum envelope comprises, in the usual manner, a glass front panel 1 having a phosphor screen portion 1 and a peripheral flange 1", a conical glass portion 2 and the tube neck 3.
  • the base contacts (not shown) are disposed at the tube neck 3.
  • the flange 1 of the front panel 1 is connected with the conical portion 2 in a vacuum-tight manner, perferably by means of a glass solder 5.
  • an apertured color mask 4 is provided which generally consists of a thin perforated metal sheet which is tensioned in a frame structure 10.
  • the frame is fastened to the inner wall of the front panel 1 by any known fastening means, the front panel 1 being provided with projections 10' for this purpose.
  • a ferromagnetic shielding funnel 6 is disposed within the conical portion 2, the shape of the funnel being adapted to the shape of the inner wall of the conical portion 2, but preferably with a certain spacing from the inner wall thereof.
  • the inner wall 2 of the conical portion 2 is provided with supporting structure for the'funnel 6 in the form of a plurality of projections 8, preferably three, although it should be understood that any number could be utilized as desired.
  • projections may be integral extensions of the conical portion 2 or they may consist of pins or the like, e.g.,
  • the outer surface of the shielding funnel 6 bears a number of resilient tongues 7 which correspond to the number of projections 8 and which enclose the ends of the projections 8 with appropriately configured openings or recesses so that the accurate positioning of the shielding funnel 6 within the conical part 2 is assured.
  • the shielding funnel 6 can be retrieved without difficulty by releasing the resilient tongues 7 from their engagement with the projections 8.
  • the degree of resiliency preferably desired in this and the other embodiments is such that with any deviations in the dimensions of the shielding funnel due to tolerance values, heat expansion or the like, no interfering deformation forces will be transferred to the fastening parts.
  • FIGS. 2, 2a and 3 show another preferred embodiment of the present invention in which the shielding funnel 6 is provided with openings or recesses 6' along its periphery. These openings or recesses engage therein the ends of the funnel supporting structure which is again in the form of projections 9 extending from the inner wall 2 of the conical portion 2.
  • the releasable fastening of the shielding funnel 6 in this embodiment occurs in one instance (FIG. 2) because of the inherent elasticity of the shielding funnel 6 which makes it possible to deflect the funnel 6 sufficiently to release the engagement of the openings and the projections, and in another instance (FIG.
  • the shielding funnel 6 may be configured to include tongues 9' which border the openings 6' and extend from the shielding funnel 6 and include a bent-over portion 9" which in turn engage the projections 9. Again, the funnel 6 can be deflected to release it.
  • FIG. 4 shows another embodiment of the present invention in which the shielding funnel 6 is provided with outwardly bent tongues or an outwardly bent flange l 1 at its larger periphery, so that the funnel 6 can be clamped to the supporting structure in the form of the frame or carrier 10 of. the apertured color mask 4.
  • the tongues or flange 11 are fastened to the carrier 10 by resilient spring clips 12, which have one arm 12' inserted through opening 10", so that arms 12 and 12" may clamp the tongues or flange l1 and the carrier 10 therebetween.
  • the shielding funnel 6 is provided with tongues 13 which protrude upwardly through the corresponding openings 13' in the frame 10 of the apertured color mask 4 and are then twisted or bent over. This type of fastening can also be released at any time without any damage to the members being fastened.
  • FIGS. 6 and 6a show a further embodiment of a clamp-type fastening to connect the shielding funnel 6 with the supporting structure in the form of the frame or carrier 10 of the color mask.
  • a plurality of laterally extending tongues or an annular flange 14 with openings 14 is disposed at the larger periphery of the shielding funnel 6.
  • the flange 14 terminates in an end portion which extends in substantially the same direction as the funnel along the side of the frame 10.
  • Corresponding openings 16 are provided in the section of the L-shaped frame or carrier 10 which extends transverse to the axis of the tube, which openings 16 are placed in alignment with openings 14'.
  • a resilient metal clamp 15 which is inserted into the two aligned openings 14 and 16 is used to assure the releasable fastening of the shielding funnel to the carrier 10 of the color mask 4.
  • the elastic configuration of this type of fastening further assures that no undesired deformations of the parts to be fastened together, and particularly of the color mask, can occur when there are tolerance deviations.
  • FIGS. 7 and 7a show a further preferred embodiment of the fastening of the shielding funnel 6 to the carrier 10 of the color mask 4.
  • the shielding funnel 6 is provided at its larger periphery with a plurality of tongues or an annular flange 17 which is provided with openings 17' and 17".
  • the carrier 10 is also provided with appropriately disposed openings 19 and 20.
  • the two parts to be fastened together are so placed on top of one another that the openings 17' and 17" are in alignment with the openings 19 and 20.
  • An elastic metal clamp 18, e.g., a wire provides the fastening means which is inserted into the aligned openings l7, l9 and 17 20 for resiliently connecting the funnel 6 and carrier 10.
  • FIG. 8 A further suitable releasable fastening for the shielding funnel 6 within the vacuum vessel is shown in FIG. 8 and consists in the use of the funnel supporting structure in the form of projections or pins It), usually provided on the inner wall of the peripheral flange 1" of the front panel 1 for holding the color mask 4 as fastening'members for the shielding funnel as well.
  • similar fastening elements 7 as those shown in FIG. 1 should advisably be provided extending from the shielding funnel 6.
  • a color television picture tube including: a glass vacuum tube having a front screen portion with a peripheral flange extending therefrom, a conical portion having a neck portion extending from one end thereof and means for attaching the flange of said screen portion to the other end of siad conical portion; a beam source of electrons mounted in the neck portion of the tube to be deflected by means attached to the tube so that the electron beam scans the front screen portion; a ferromagnetic shielding funnel disposed within said conical portion; an apertured color mask mounted on a color mask frame positioned between said ferromagnetic shielding funnel and said display screen, said frame having an L-shaped cross section with one section extending transversely to the axis or said tube; means for attaching said frame to said peripheral flange for said front screen portion; and means for fastening said funnel to said frame to support same within said conical portion;
  • said funnel being provided with a flange member extending transversely from the larger end thereof and including a plurality of openings, said transversely extending member having a portion, at the end thereof opposite the large end of said funnel, which extends in substantially the same direction as said funnel along the side of said frame;
  • the transverse section of said frame being provided with a like plurality of openings aligned with the opening in the transverse portion of said flange member; and said fastening means comprises means for releasably fastening said funnel to said frame including a plurality of resilient clamps each engaging said funnel and said frame through an aligned pair of openings of said funnel and said frame.

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)
US00160300A 1970-07-07 1971-07-07 Color tube having funnel shield attached to shadow mask frame Expired - Lifetime US3821583A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702033558 DE2033558C (de) 1970-07-07 Farbfernsehbildröhre

Publications (1)

Publication Number Publication Date
US3821583A true US3821583A (en) 1974-06-28

Family

ID=5775996

Family Applications (1)

Application Number Title Priority Date Filing Date
US00160300A Expired - Lifetime US3821583A (en) 1970-07-07 1971-07-07 Color tube having funnel shield attached to shadow mask frame

Country Status (4)

Country Link
US (1) US3821583A (enExample)
BE (1) BE769647A (enExample)
FR (1) FR2100378A5 (enExample)
GB (1) GB1356440A (enExample)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935496A (en) * 1973-11-30 1976-01-27 U.S. Philips Corporation Structure for attaching conical shield to shadow mask
US3969648A (en) * 1974-09-03 1976-07-13 Advent Corporation Projection television tube system
DE2551327A1 (de) * 1974-11-15 1976-08-12 Mitsubishi Electric Corp Einrichtung zur befestigung der inneren magnetischen abschirmung einer kathodenstrahl-farbbildroehre
US4230966A (en) * 1977-11-18 1980-10-28 U.S. Philips Corporation Metal strip attached to high voltage contact with getter at one end and contact to shield cone at the other
DE3033978A1 (de) * 1979-10-01 1981-04-16 Owens-Illinois, Inc., 43666 Toledo, Ohio Kathodenstrahlroehre mit magnetischer abschirmung
FR2487119A1 (fr) * 1980-07-21 1982-01-22 Philips Nv Tube d'images en couleur muni d'une electrode de selection de couleur suspendue dans les angles de la fenetre d'image
US4467241A (en) * 1979-10-01 1984-08-21 Owens-Illinois, Inc. CRT With magnetic shield
US4694216A (en) * 1986-05-27 1987-09-15 Rca Corporation Cathode-ray tube having an internal magnetic shield
US5327043A (en) * 1992-07-15 1994-07-05 Rca Thomson Licensing Corporation Internal magnetic shield-frame mounting means
DE19530895C2 (de) * 1995-08-14 2000-09-28 Samsung Elektronische Baueleme Verbindungssystem zur Befestigung von magnetischen Abschirmungen an Maskenrahmen in Kathodenstrahlröhren
US6213836B1 (en) * 1996-12-13 2001-04-10 Matsushita Electronics Corporation Cathode ray tube and method for manufacturing the same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6005341A (en) * 1996-10-31 1999-12-21 Lg Electronics Inc. Shield for a cathode ray tube
TW434631B (en) * 1996-11-30 2001-05-16 Lg Electronics Inc Flat cathode-ray tube

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3935496A (en) * 1973-11-30 1976-01-27 U.S. Philips Corporation Structure for attaching conical shield to shadow mask
US3969648A (en) * 1974-09-03 1976-07-13 Advent Corporation Projection television tube system
DE2551327A1 (de) * 1974-11-15 1976-08-12 Mitsubishi Electric Corp Einrichtung zur befestigung der inneren magnetischen abschirmung einer kathodenstrahl-farbbildroehre
US4230966A (en) * 1977-11-18 1980-10-28 U.S. Philips Corporation Metal strip attached to high voltage contact with getter at one end and contact to shield cone at the other
DE3033978A1 (de) * 1979-10-01 1981-04-16 Owens-Illinois, Inc., 43666 Toledo, Ohio Kathodenstrahlroehre mit magnetischer abschirmung
US4467241A (en) * 1979-10-01 1984-08-21 Owens-Illinois, Inc. CRT With magnetic shield
FR2487119A1 (fr) * 1980-07-21 1982-01-22 Philips Nv Tube d'images en couleur muni d'une electrode de selection de couleur suspendue dans les angles de la fenetre d'image
US4694216A (en) * 1986-05-27 1987-09-15 Rca Corporation Cathode-ray tube having an internal magnetic shield
US5327043A (en) * 1992-07-15 1994-07-05 Rca Thomson Licensing Corporation Internal magnetic shield-frame mounting means
DE19530895C2 (de) * 1995-08-14 2000-09-28 Samsung Elektronische Baueleme Verbindungssystem zur Befestigung von magnetischen Abschirmungen an Maskenrahmen in Kathodenstrahlröhren
US6213836B1 (en) * 1996-12-13 2001-04-10 Matsushita Electronics Corporation Cathode ray tube and method for manufacturing the same

Also Published As

Publication number Publication date
DE2033558A1 (enExample) 1972-01-13
FR2100378A5 (enExample) 1972-03-17
GB1356440A (en) 1974-06-12
BE769647A (fr) 1971-11-16
DE2033558B2 (de) 1972-01-13

Similar Documents

Publication Publication Date Title
US3821583A (en) Color tube having funnel shield attached to shadow mask frame
US3296625A (en) Cathode ray tube with electrode supported by strap-like springs
US3803436A (en) Shadow mask mounting assemblies
GB2081001A (en) Colour display tube
US3986071A (en) Resilient clamping members for color selection electrode
US4300071A (en) Four-corner shadow mask suspension system for television cathode ray tubes
US2846608A (en) Cathode-ray tube
KR940000301B1 (ko) 샤도우 마스크의 프레임 어셈블리 지지부를 가진 칼라 화상 튜브
US4652791A (en) Color cathode ray tube and tensible shadow mask blank for use therein
US3377493A (en) Clip for mounting peripheral electron shield on shadow mask of color television tube, provided with contact spring to tube inner coating
US3524096A (en) Color cathode ray tube having shadow mask frame formed to accommodate a support system
US2942129A (en) Cathode-ray tube structure
KR100270351B1 (ko) 브래킷을 갖는 폭축 보호 밴드를 구비한 crt
US3576395A (en) Integral support and magentic shielding means for cathode-ray
WO1999034391A1 (en) Color cathode ray tube with improved shadow mask mounting system
US3404302A (en) Envelope wall with two continuous ledges for positioning and supporting aperture mask
US4700260A (en) Degaussing coil and ground strap mounting arrangement
RU2137244C1 (ru) Цветной кинескоп с улучшенной системой крепления теневой маски к раме
US4593225A (en) Tension mask colar cathode ray tube
US3936691A (en) Color cathode ray tube frame-color selection electrode support structure
US5391957A (en) Vibration damping means for a strip shadow mask
US3796903A (en) Connecting member in post focusing type colour picture tubes
JPH0660822A (ja) 陰極線管
US3501663A (en) Parallax barrier protecting means for cathode ray tubes having patterned screens
US3860851A (en) Gauze electrode for a cathode-ray tube