JPS5231760A - Method of detecting decreased thickness of glass bulbs for braun tubes - Google Patents

Method of detecting decreased thickness of glass bulbs for braun tubes

Info

Publication number
JPS5231760A
JPS5231760A JP10694175A JP10694175A JPS5231760A JP S5231760 A JPS5231760 A JP S5231760A JP 10694175 A JP10694175 A JP 10694175A JP 10694175 A JP10694175 A JP 10694175A JP S5231760 A JPS5231760 A JP S5231760A
Authority
JP
Japan
Prior art keywords
decreased thickness
glass bulbs
detecting decreased
braun tubes
bulbs
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.)
Pending
Application number
JP10694175A
Other languages
Japanese (ja)
Inventor
Yasuo Hama
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
Priority to JP10694175A priority Critical patent/JPS5231760A/en
Publication of JPS5231760A publication Critical patent/JPS5231760A/en
Pending legal-status Critical Current

Links

Landscapes

  • Length-Measuring Instruments Using Mechanical Means (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Abstract

PURPOSE: To put special marks such as concave and convex corresponding to allowable thickness reduction protions beforehand on the surface of glas bulbs and detect the changes of these marks thereby easily assessing the thickness reduction by a simple method.
COPYRIGHT: (C)1977,JPO&Japio
JP10694175A 1975-09-05 1975-09-05 Method of detecting decreased thickness of glass bulbs for braun tubes Pending JPS5231760A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10694175A JPS5231760A (en) 1975-09-05 1975-09-05 Method of detecting decreased thickness of glass bulbs for braun tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10694175A JPS5231760A (en) 1975-09-05 1975-09-05 Method of detecting decreased thickness of glass bulbs for braun tubes

Publications (1)

Publication Number Publication Date
JPS5231760A true JPS5231760A (en) 1977-03-10

Family

ID=14446396

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10694175A Pending JPS5231760A (en) 1975-09-05 1975-09-05 Method of detecting decreased thickness of glass bulbs for braun tubes

Country Status (1)

Country Link
JP (1) JPS5231760A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62131451A (en) * 1985-12-04 1987-06-13 Hitachi Ltd Fully automatic inspection system for reinforced cathode ray tubes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62131451A (en) * 1985-12-04 1987-06-13 Hitachi Ltd Fully automatic inspection system for reinforced cathode ray tubes
US4850921A (en) * 1985-12-04 1989-07-25 Hitachi, Ltd. Full automatic total inspection system for implosion-protected cathode-ray tube

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