US 6,150,760 A · Cathode ray tube

Abstract

An implosion protection-enhanced cathode ray tube (CRT) includes an evacuated envelope structured from a display panel section, a neck, and a funnel section. The CRT comes with a reinforcing metal band for implosion protection clamped by thermal shrink-fit methods around the outer periphery of the panel. This implosion-protective band may be a metal strip of generally rectangular closed-loop shape. The strip is machined to have bent walls so that it resembles in shape an open-roof dome as a whole. Preferably, the band has its one edge as folded back or "curled" defining a "flip." Upon attachment to the display panel, the band is placed so that the "peak" of each bulged wall is offset in position from a mold match line of the panel toward the CRT neck. With such "band preoffset" feature, the implosion-protective band offers increased locking or clamping forces against the panel thus enhancing the CRT implosion protecting ability.

Claims8

Dependent claims

A cathode ray tube comprising:

an evacuated envelope including a panel section having an inside surface with a phosphor screen thereon, a neck containing therein an electron gun, and a cone-shaped section integrally coupling said panel and said neck together;
and
a band-like reinforcing member positioned around said panel section;
said reinforcing member being of closed loop shape surrounding the longitudinal tube axis and having a side wall which is bent inwardly along a circumferential line thereon to define a wall with a bent portion, said circumferential line of said bent portion being offset in position relative to a mold match line of said panel toward said neck by a predetermined amount.

1 more element

Dependencies are inferred from the claim text.

Cathode ray tube

Life of this patent

Cathode ray tube

Life of this patent

Abstract

Claims8