GB1227894A - - Google Patents

Info

Publication number
GB1227894A
GB1227894A GB1227894DA GB1227894A GB 1227894 A GB1227894 A GB 1227894A GB 1227894D A GB1227894D A GB 1227894DA GB 1227894 A GB1227894 A GB 1227894A
Authority
GB
United Kingdom
Prior art keywords
wall section
gusset plates
flange
continuous
section
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
Application number
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 filed Critical
Publication of GB1227894A publication Critical patent/GB1227894A/en
Expired 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
    • 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
    • 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

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)
  • Casings For Electric Apparatus (AREA)

Abstract

1,227,894. Colour television tubes. NORTHERN METAL PRODUCTS Ltd. 10 Sept., 1969 [1 May, 1969], No. 44715/69. Heading H1D. A self-supporting rectangular shadow mask comprises an apertured front section surrounded by an imperforate margin in which a continuous strengthening rib is formed, a wall section extending rearward from the margin for about 1¢ inches for a 21-inch or 24-inch tube and including at least one strenghtening rib, a flange section extending inwardly from the back edge of the wall section, and gusset plates rigidly attached to the flange section at its four corners as by welding. Additional gusset plates may be secured to the flange between the corners. The mask is preferably formed from a single sheet of metal and the gusset plates may be of the same metal but preferably twice as thick. The wall section may include a continuous strengthening rib extending round its perimeter, and short additional strengthening ribs at right-angles to the continuous one. Spring-like mounting tabs may be attached to the outside of the wall section.
GB1227894D 1969-05-01 1969-09-10 Expired GB1227894A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US82105669A 1969-05-01 1969-05-01

Publications (1)

Publication Number Publication Date
GB1227894A true GB1227894A (en) 1971-04-07

Family

ID=25232383

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1227894D Expired GB1227894A (en) 1969-05-01 1969-09-10

Country Status (6)

Country Link
US (1) US3558955A (en)
BE (1) BE749492A (en)
DE (1) DE1947432A1 (en)
FR (1) FR2046087A5 (en)
GB (1) GB1227894A (en)
NL (1) NL7006115A (en)

Families Citing this family (3)

* 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
US3912963A (en) * 1973-09-07 1975-10-14 Zenith Radio Corp Color crt having shadow mask with forwardly directed, outwardly flared skirt
US20070221591A1 (en) * 2006-03-24 2007-09-27 Yang-Yuan Hsu Wedged sliding trough structure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2897392A (en) * 1956-02-09 1959-07-28 Zenith Radio Corp Color television tube mask and frame assembly
US3351996A (en) * 1965-03-29 1967-11-14 Rauland Corp Method of making a rectangular-mask assembly for a shadow-mask type of color tube
US3479546A (en) * 1968-06-11 1969-11-18 Buckbee Mears Co Self-supporting shadow mask for colored tv picture tubes

Also Published As

Publication number Publication date
BE749492A (en) 1970-10-01
DE1947432A1 (en) 1970-11-05
FR2046087A5 (en) 1971-03-05
US3558955A (en) 1971-01-26
NL7006115A (en) 1970-11-03

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees