US3777057A - Cathode ray tubes - Google Patents

Cathode ray tubes Download PDF

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Publication number
US3777057A
US3777057A US00146042A US3777057DA US3777057A US 3777057 A US3777057 A US 3777057A US 00146042 A US00146042 A US 00146042A US 3777057D A US3777057D A US 3777057DA US 3777057 A US3777057 A US 3777057A
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US
United States
Prior art keywords
cathode ray
ray tube
tension band
implosion
mounting lugs
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
US00146042A
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English (en)
Inventor
K Abe
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Application granted granted Critical
Publication of US3777057A publication Critical patent/US3777057A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

  • BF 2 INVENTOR BY m M k mm ATTORNEYS CATHODE RAY TUBES BACKGROUND OF THE INVENTION This invention relates to an implosion-proof cathode ray tube assembly, and more particularly to an implosion-proof cathode ray tube assembly having mounting lugs for mounting the tube in a television receiving set.
  • Shelbond (trade mark) type the so-called Shelbond (trade mark) type, Kimcode (trade mark) type and tension band type are included.
  • a mounting unit such as a frame
  • the implosion-proof cathode ray tube or to form mounting lugs by bending a plurality of projections provided on the reinforcing band for the implosion-proof cathode ray tube, such as a rim band or a tension band.
  • lugs adapted to mount the cathode ray tube on the television set are welded to the band.
  • the mounting lugs are welded to the reinforcing band secured to the cathode ray tube, not only is the welding operation troublesome, but also the reliability of the welds is low. Further, the heat of welding causes damage to the cathode ray tube or a decrease in the reinforcing effect of the reinforcing band.
  • a further object of this invention is to provide an implosion-proof cathode ray tube assembly capable of perfectly preventing the movement or shift of the position of the mounting lugs, which is caused by the shearing force applied to the second tension band when it is tightened for the purpose of securely fixing the mounting lugs.
  • Another object of this invention is to provide an improved implosion-proof cathode ray tube assembly which can be secured by the reinforcing band without using a resinous binder and by which the mounting lugs can be secured without relying upon a welding operation, thus preventing spoilage of the cathode ray tube, so that the tube can be manufactured by mass production techniques.
  • Yet another object of this invention is to provide an implosion-proof cathode ray tube assembly utilizing first and second reinforcing bands, wherein the first band is used to reinforce the tube against implosion by the tightening force of the band, whereas the second band is used mainly to secure the mounting lugs and additionally to improve the implosionproof quality of the tube.
  • FIG. I shows a front elevation of one example of the novel cathode ray tube with mounting lugs
  • FIG. 2 shows a partial sectional view of the cathode ray tube shown in FIG. 1, taken along line [1-1];
  • FIG. 3 shows a diagrammatic elevation illustrating a jig for applying the tension bands to the implosionproof cathode ray tube
  • FIG. 4 shows a sectional view taken along line IV-IV in FIG. '3.
  • the cathode ray tube 1 itself has a conventional construction and comprises a rectangular deep dish-shapedpanel I1 and a funnel portion 12 abutting each other.
  • an adhesive tape 2 of polyester for example, which is wrapped about the periphery.
  • a first tension band 3 for example, a steel tape, extending in the same direction as the adhesive tape 2, is tightly wrapped around the panel 11 under a tension commensurate with the physical dimension of the cathode ray tube, for example, under a tension of approximately 100 to 600 Kg.
  • the mounting lugs may have any well known construction and are shown herein as lugs having an L-shaped cross-sectional configuration formed with openings 41 for mounting the cathode ray tube in a television set.
  • the anti-skid means comprise a plurality of projections 42 formed on the inner surfaces of the mounting lugs 4 confronting the outer surface of the first tension band 3.
  • the anti-skid means may be provided by forming coarse surfaces on the outer surface of the first tension band 3 facing the mounting lugs, or forming such coarse surfaces on the inner surfaces of the mounting lugs.
  • Tightening of the reinforcing or tension bands can be advantageously performed by using a jig as shown in FIGS. 3 and 4.
  • the jig 13 shown in these figures includes a vacuum suction pad 14 at its center for supporting the panel 11 of the cathode ray tube 1.
  • the rear end of the vacuum suction pad 14 is connected to a suitable source of vacuum, not shown, and an adjustable screw 15 is provided between the bottom wall of the jig l3 and the neck of the suction pad for adjusting the vertical position thereof.
  • a band clamp 16 is mounted on the jig to be movable toward the center of the cathode ray tube at a position corresponding to one side of the cathode ray tube fixed to the vacuum suction pad.
  • a welder 17 for welding the end of the first or second tension band which is tightly wrapped about the cathode ray tube 1.
  • a pair of opposing guide members 18 which are movable toward the center of the cathode ray tube to maintain the position of the first tension band 3 or the second tension band 5 relative to the cathode ray tube, so as to align the respective bands.
  • lug clamp members 19 each including a head 20 for holding the lug and a pneumatic piston-cylinder assembly 21 for forcing the head 20 toward the cathode ray tube.
  • a cathode ray tube 1 around which has been wrapped the adhesive tape 2 and the first tension band 3 in any well known manner, is mounted on the vacuum suction pad 14. Thereafter, pneumatic piston-cylinder assemblies 21 of the respective lug clamp members 19 are operated to force the mounting lugs 4 against the outer surface of the first tension band 3. Then the second tension band 5 is wrapped about the cathode ray tube 1, that is, around the outer periphery of the first tension band 3 on the outside of respective mounting lugs 4, during which operation the band clamp 16 is operated to hold a portion of the second tension band.
  • the adhesive tape and the first tension band can also be applied on the cathode ray tube while it is mounted on the jig.
  • said anti-skid means comprises coarse surfaces formed on the outer periphery of said first tension band at least at portions thereof facing said mounting lugs.

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
US00146042A 1970-05-22 1971-05-24 Cathode ray tubes Expired - Lifetime US3777057A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4333870 1970-05-22

Publications (1)

Publication Number Publication Date
US3777057A true US3777057A (en) 1973-12-04

Family

ID=12661040

Family Applications (1)

Application Number Title Priority Date Filing Date
US00146042A Expired - Lifetime US3777057A (en) 1970-05-22 1971-05-24 Cathode ray tubes

Country Status (5)

Country Link
US (1) US3777057A (ja)
CA (1) CA930009A (ja)
DE (1) DE2125412A1 (ja)
FR (1) FR2093565A5 (ja)
GB (1) GB1295574A (ja)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4155102A (en) * 1977-08-15 1979-05-15 U.S. Philips Corporation Cathode ray tube
US4170027A (en) * 1978-03-27 1979-10-02 Gte Sylvania Incorporated Implosion resistant cathode ray tube and fabricating process
US4206534A (en) * 1978-03-27 1980-06-10 Gte Products Corporation Implosion-resistant cathode ray tube and fabricating process
US4210935A (en) * 1978-09-12 1980-07-01 Gte Products Corporation L-shaped bracket assembly and rimband type implosion-resistant cathode ray tube
DE3142162A1 (de) * 1980-10-24 1982-04-29 RCA Corp., 10020 New York, N.Y. Einrichtung zum anbringen eines spannbandes an einem gegenstand
US4342049A (en) * 1980-05-08 1982-07-27 North American Philips Consumer Electronics Corp. Supportive means for a cathode ray tube
US4415932A (en) * 1982-05-21 1983-11-15 Zenith Radio Corporation CRT Mounting and implosion-protection means and method
US5233432A (en) * 1991-11-04 1993-08-03 Thomson Consumer Electronics Cathode-ray tube having implosion protection means with a structure and method to facilitate attachment of tube mounting means

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3271516A (en) * 1962-10-22 1966-09-06 Owens Illinois Inc Implosion resistant cathode ray tube with integral mounting elements to facilitate installation
US3317172A (en) * 1965-06-02 1967-05-02 George K Garrett Company Picture tube mounting
US3456076A (en) * 1964-11-24 1969-07-15 Westinghouse Electric Corp Implosion protection for cathode ray tubes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3271516A (en) * 1962-10-22 1966-09-06 Owens Illinois Inc Implosion resistant cathode ray tube with integral mounting elements to facilitate installation
US3456076A (en) * 1964-11-24 1969-07-15 Westinghouse Electric Corp Implosion protection for cathode ray tubes
US3317172A (en) * 1965-06-02 1967-05-02 George K Garrett Company Picture tube mounting

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4155102A (en) * 1977-08-15 1979-05-15 U.S. Philips Corporation Cathode ray tube
US4170027A (en) * 1978-03-27 1979-10-02 Gte Sylvania Incorporated Implosion resistant cathode ray tube and fabricating process
US4206534A (en) * 1978-03-27 1980-06-10 Gte Products Corporation Implosion-resistant cathode ray tube and fabricating process
US4210935A (en) * 1978-09-12 1980-07-01 Gte Products Corporation L-shaped bracket assembly and rimband type implosion-resistant cathode ray tube
US4342049A (en) * 1980-05-08 1982-07-27 North American Philips Consumer Electronics Corp. Supportive means for a cathode ray tube
DE3142162A1 (de) * 1980-10-24 1982-04-29 RCA Corp., 10020 New York, N.Y. Einrichtung zum anbringen eines spannbandes an einem gegenstand
US4352226A (en) * 1980-10-24 1982-10-05 Rca Corporation System for applying and tensioning an implosion protecting band to a CRT with a tension between selected limits
US4415932A (en) * 1982-05-21 1983-11-15 Zenith Radio Corporation CRT Mounting and implosion-protection means and method
US5233432A (en) * 1991-11-04 1993-08-03 Thomson Consumer Electronics Cathode-ray tube having implosion protection means with a structure and method to facilitate attachment of tube mounting means

Also Published As

Publication number Publication date
GB1295574A (ja) 1972-11-08
CA930009A (en) 1973-07-10
FR2093565A5 (ja) 1972-01-28
DE2125412A1 (de) 1971-12-16

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