US3573368A - Cathode-ray tube implosion guard with beeswax annular metal frame and metal band - Google Patents

Cathode-ray tube implosion guard with beeswax annular metal frame and metal band Download PDF

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Publication number
US3573368A
US3573368A US721486A US3573368DA US3573368A US 3573368 A US3573368 A US 3573368A US 721486 A US721486 A US 721486A US 3573368D A US3573368D A US 3573368DA US 3573368 A US3573368 A US 3573368A
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US
United States
Prior art keywords
band
beeswax
metal
bands
ray tube
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
US721486A
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English (en)
Inventor
Friedrich Kober
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.)
US Philips Corp
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US Philips Corp
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Filing date
Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
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Publication of US3573368A publication Critical patent/US3573368A/en
Anticipated expiration legal-status Critical
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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
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/87—Arrangements for preventing or limiting effects of implosion of vessels or containers

Definitions

  • Trifari ABSTRACT An implosion resistant cathode ray tube -for television display employing a first metal band surrounding and secured to the envelope adjacent the screen and a second metal, preferably steel, band around the first band and subjected to a large tensile stress. The second hand glides over the first and to equalize tension at the corners, a lubricant is applied between the bands to reduce function between the bands. As a lubricant, beeswax is preferred.
  • the invention relates to a television display tube having an implosion guard which consists of a metal ring which is stuck, for example, to the tube, and of at least one steel band arranged around the ring and subjected to a large tensile stress.
  • annular frames of a corrosion-resistant sheet iron are used which are provided with reinforming ribs and with lugs at the corners for securing the display tube in the cabinet of a receiver. These bands are pressed over the tube from the neck as far as the mould match line and are surrounded by at least one steel band subjected to a large tensile stress.
  • the frictional forces are produced between the steel band and the annular frame or between separate steel bands if several juxtaposed steel bands are stretched around the annular frame.
  • the invention is based on recognition of the fact that it is essential to provide the steel bands on the annular frame so that the forces produced at the separate corners of the display tube are the same. According to the invention, this may be achieved by reducing the coefficients of friction between the annular frame and the steel band or between the separate steel bands.
  • a conditioner preferably beeswax, is applied between the metal bands, at least near the corners of the display tube, i.e. at areas at which a great frictional force is to be expected.
  • the conditioner may be applied both between these steel bands and between the lower steel band and the annular frame near the corners. If the conditioner is applied in manner, the coefficient of friction at the critical points is reduced to such an extent that a uniform distribution of force at the comers of the display tube I is obtained without the stretching machine sliding off along the bands. However, it is also recommendable to apply a conditioner to the inner sides of the beginning and the end of a band sliding over each other and clamped by the stretching device, because the tensile force produced in the band by the stretching device is a maximum when the friction between the band and the stretching device is a maximum and that between the beginning and the end of a band is a minimum.
  • FIG. 2 shows on an enlarged scale a part with two comers of a an approximately rectangular television display tube
  • FIG. 3 shows the comer of a television display tube of FIG. 1, the implosion guard now consisting of an annular frame and two juxtaposed steel bands.
  • reference numeral 1 denotes the television display tube,'viewed from the screen side, over the periphery of which is passed an annular frame 2 which is provided at its comers with lugs 3 for securing the tube in the cabinet of a receiver and is surrounded by a steel-clamping band 4 (shown in dotted lines).
  • reference numeral 1 also denotes the television display tube
  • reference numeral 2 the annular frame
  • FIG. 3 the lug and reference numeral .4 the steelclamping band.
  • This FIG. shows a television display tube the screen of which is located on the front side of the cabinet of limited by transverse lines 7 between the parts sliding with friction over each other, i.e. between the annular frame 2 and the steel band 4 or between the annular frame 2, the steel band 4 and the steel band 6.
  • These conditioners cause the coefficients of friction between the various bands to be reduced to such an extent that the bands can be pulled across the comers without difficulty and that equal forces are produced at all the comers of the television display tube.
  • a cathode-ray tube for television display having a substantially rectangular window portion and a conical portion adjoining the window portion,'an annular metal frame surrounding and secured to the conical portion adjacent the juncture thereof with said window portion, a metal band under tensile stress surrounding the annular metal frame, and a lubricant consisting of beeswax between the metal band and the metal frame to reduce the coefficient of friction therebetween whereby the band can be drawn over the frame and the distribution of force at the comers is made uniform.

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
US721486A 1967-05-11 1968-04-15 Cathode-ray tube implosion guard with beeswax annular metal frame and metal band Expired - Lifetime US3573368A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP0042115 1967-05-11

Publications (1)

Publication Number Publication Date
US3573368A true US3573368A (en) 1971-04-06

Family

ID=7378330

Family Applications (1)

Application Number Title Priority Date Filing Date
US721486A Expired - Lifetime US3573368A (en) 1967-05-11 1968-04-15 Cathode-ray tube implosion guard with beeswax annular metal frame and metal band

Country Status (9)

Country Link
US (1) US3573368A (enrdf_load_stackoverflow)
AT (1) AT278918B (enrdf_load_stackoverflow)
BE (1) BE714933A (enrdf_load_stackoverflow)
CH (1) CH479951A (enrdf_load_stackoverflow)
DE (1) DE1512385B2 (enrdf_load_stackoverflow)
ES (1) ES353713A1 (enrdf_load_stackoverflow)
FR (1) FR1567427A (enrdf_load_stackoverflow)
GB (1) GB1172342A (enrdf_load_stackoverflow)
NL (1) NL6806409A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4988662U (enrdf_load_stackoverflow) * 1972-11-13 1974-08-01
JPS506612A (enrdf_load_stackoverflow) * 1973-05-21 1975-01-23
JPS507466A (enrdf_load_stackoverflow) * 1973-05-18 1975-01-25
JPS5285368U (enrdf_load_stackoverflow) * 1975-12-22 1977-06-25
US4121257A (en) * 1977-02-28 1978-10-17 Rca Corporation Cathode-ray tube with double tension band
US4170027A (en) * 1978-03-27 1979-10-02 Gte Sylvania Incorporated Implosion resistant cathode ray tube and fabricating process
US20030235028A1 (en) * 2002-06-25 2003-12-25 Swank Harry Robert Implosion resistant cathode ray tube with mounting lug having a compound bend

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2970311A (en) * 1955-12-01 1961-01-31 Motorola Inc Television receiver
US3278682A (en) * 1963-04-03 1966-10-11 Philips Corp Implosion-resistant cathode-ray tube with mounting brackets

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2970311A (en) * 1955-12-01 1961-01-31 Motorola Inc Television receiver
US3278682A (en) * 1963-04-03 1966-10-11 Philips Corp Implosion-resistant cathode-ray tube with mounting brackets

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4988662U (enrdf_load_stackoverflow) * 1972-11-13 1974-08-01
JPS507466A (enrdf_load_stackoverflow) * 1973-05-18 1975-01-25
JPS506612A (enrdf_load_stackoverflow) * 1973-05-21 1975-01-23
JPS5285368U (enrdf_load_stackoverflow) * 1975-12-22 1977-06-25
US4121257A (en) * 1977-02-28 1978-10-17 Rca Corporation Cathode-ray tube with double tension band
US4170027A (en) * 1978-03-27 1979-10-02 Gte Sylvania Incorporated Implosion resistant cathode ray tube and fabricating process
US20030235028A1 (en) * 2002-06-25 2003-12-25 Swank Harry Robert Implosion resistant cathode ray tube with mounting lug having a compound bend
US6757158B2 (en) * 2002-06-25 2004-06-29 Thomson Licensing S. A. Implosion resistant cathode ray tube with mounting lug having a compound bend

Also Published As

Publication number Publication date
GB1172342A (en) 1969-11-26
DE1512385B2 (de) 1970-11-26
AT278918B (de) 1970-02-25
DE1512385A1 (de) 1969-07-03
ES353713A1 (es) 1969-10-16
NL6806409A (enrdf_load_stackoverflow) 1968-11-12
FR1567427A (enrdf_load_stackoverflow) 1969-05-16
CH479951A (de) 1969-10-15
BE714933A (enrdf_load_stackoverflow) 1968-11-12

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