CA2049671A1 - Color picture tube having improved shadow mask frame - Google Patents

Color picture tube having improved shadow mask frame

Info

Publication number
CA2049671A1
CA2049671A1 CA002049671A CA2049671A CA2049671A1 CA 2049671 A1 CA2049671 A1 CA 2049671A1 CA 002049671 A CA002049671 A CA 002049671A CA 2049671 A CA2049671 A CA 2049671A CA 2049671 A1 CA2049671 A1 CA 2049671A1
Authority
CA
Canada
Prior art keywords
frame
shadow mask
corners
section
support means
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.)
Granted
Application number
CA002049671A
Other languages
French (fr)
Other versions
CA2049671C (en
Inventor
Paolo Spina
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.)
Videocolor SpA
Original Assignee
Videocolor SpA
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 Videocolor SpA filed Critical Videocolor SpA
Publication of CA2049671A1 publication Critical patent/CA2049671A1/en
Application granted granted Critical
Publication of CA2049671C publication Critical patent/CA2049671C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

An improved color picture tube includes an evacuated envelope having a rectangular faceplate panel. The panel includes a viewing screen on an inner surface thereof and a shadow mask-frame assembly mounted therein by support means located at the four corners of the panel. The shadow mask-frame assembly includes an apertured shadow mask and a peripheral frame to which the mask is attached. The frame has two flanges arranged in an L-shaped cross-section. The support means are attached to the corners of the frame. The improvement comprises the frame being formed by four sections that are welded together at their ends. Each section includes a side of the frame and two angled corners of the frame at the ends of the section. The sections overlap each other at their ends, with both of the flanges of each section in surface-to-surface contact with each other. With this construction, the frame has a single thickness along each of its sides and a double thickness at its corners, to provide more rigid attachment locations for the support means.
CA002049671A 1990-09-28 1991-08-22 Color picture tube having improved shadow mask frame Expired - Fee Related CA2049671C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT21602A/90 1990-09-28
IT02160290A IT1243082B (en) 1990-09-28 1990-09-28 COLOR IMAGE DISPLAY TUBE EQUIPPED WITH A PERFECTED FRAME OF THE SHADOW MASK

Publications (2)

Publication Number Publication Date
CA2049671A1 true CA2049671A1 (en) 1992-03-29
CA2049671C CA2049671C (en) 2002-01-08

Family

ID=11184192

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002049671A Expired - Fee Related CA2049671C (en) 1990-09-28 1991-08-22 Color picture tube having improved shadow mask frame

Country Status (4)

Country Link
JP (1) JPH07118278B2 (en)
KR (1) KR950007680B1 (en)
CA (1) CA2049671C (en)
IT (1) IT1243082B (en)

Also Published As

Publication number Publication date
IT1243082B (en) 1994-05-23
JPH04298940A (en) 1992-10-22
JPH07118278B2 (en) 1995-12-18
IT9021602A0 (en) 1990-09-28
CA2049671C (en) 2002-01-08
IT9021602A1 (en) 1992-03-28
KR950007680B1 (en) 1995-07-14
KR920007054A (en) 1992-04-28

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed