Method of inspection for cathode-ray tube component members and apparatus used for embodying the same

A method of inspecting an electron gun used for a cathode-ray tube, comprising the steps of:

• preparing a screen panel formed with a phosphor screen and an inspection housing whose inside said electron gun is mountable on and demountable from and which is adapted to be enclosed with said screen panel;
• arranging said electron gun in said inspection housing in advance of assembling said cathode-ray tube;
• emitting light from said phosphor screen by emitting electron beams from said electron gun;
• and
• deciding whether said electron gun is defective or not defective from the illuminated condition of said phosphor screen.

A method of inspecting a shadow-mask used for a cathode-ray tube, comprising the steps of:

• preparing an electron gun, a screen panel formed with the phosphor screen and an inspection housing whose inside said shadow-mask is mountable on and demountable from and which is adapted to be enclosed with said electron gun and said screen panel;
• mounting said shadow-mask in said inspection housing in advance of assembling said cathode-ray tube;
• emitting light from said phosphor screen by emitting electron beams from said electron gun;
• and
• deciding whether said shadow-mask is defective or not defective from the illuminated condition of said phosphor screen.

An apparatus for inspecting a phosphor screen formed on a screen panel used for a cathode-ray tube, comprising:

• an electron gun for emitting electron beams;
• an inspection housing including said electron gun therein, which said screen panel is mountable on and demountable from and which is adapted to be enclosed by mounting of said screen panel thereon;
• a deflection yoke causing electron beams to scan said phosphor screen;
• and
• means for exhausting the interior of said inspection housing.

An apparatus for inspecting a electron gun used for a cathode-ray tube, comprising:

• a screen panel formed with a phosphor screen;
• an inspection housing whose inside said electron gun is mountable on and demountable from and which is adapted to be enclosed with said screen panel;
• a deflection yoke causing electron beams emitted from said electron gun to scan said phosphor screen;
• and
• means for exhausting the interior of said inspection housing.

An apparatus for inspecting a shadow-mask used for a cathode-ray tube, comprising:

• an electron gun emitting electron beams;
• an inspection housing whose inside said shadow-mask is mountable on and demountable from and which is adapted to be enclosed with said screen panel and said electron gun;
• a deflection yoke causing electron beams to scan said phosphor screen;
• and
• means for exhausting the interior of said inspection housing.