Color picture tube with shadow mask supporting members

A color picture tube comprising:

• a shadow mask assembly having a shadow mask with a large number of apertures permitting the passage of electron beams therethrough and a mask frame for holding the shadow mask at the peripheral edge thereof;
• an envelope having a face panel and a fluorescent screen on an inner surface of said panel;
• at least two pins built in an inner surface of said envelope;
• and
• at least two supporting members for supporting the shadow mask assembly so as to permit said shadow mask to oppose the fluorescent screen inside the envelope in face to face relationship, each supporting member including a first metal strip having a thermal expansion coefficient substantially equal to that of said mask frame, said first metal strip being fixed at one end portion thereof to said mask frame and engaged at the other end portion thereof with one of said pins, a second metal strip joined to said first metal strip at one side thereof so that their respective faces may form a continuous face and having a thermal expansion coefficient higher than that of said first metal strip, and a third metal strip joined to said first metal strip at the other side thereof so that their respective faces may form a continuous face and having a thermal expansion coefficient lower than that of said first metal strip.