Cathode ray tube having a fag with spring holder

Details Cathode ray tube having a fag with spring holder Cathode ray tube having a fag with spring holder

1993-09-15

2001-08-07

Patel, Ashok (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

C313S404000, C313S405000

Reexamination Certificate

active

06271624

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention generally relates to cathode ray tubes and, more particularly, is directed to a cathode ray tube (CRT) having a color selecting electrode with an opening for displaying a color image.
2. Description of the Related Art
FIG. 1
of the accompanying drawings shows a conventional cathode ray tube of this type.
As shown in
FIG. 1
, a panel
11
, a funnel portion
12
and a neck portion
12
a
, each being made of glass, constitute a tube envelope. A color selecting electrode
13
(e.g., aperture grill or the like) is disposed on the inner surface of a skirt portion
11
a
of the panel
11
, and an electron gun
18
is disposed within the neck portion
12
a.
As shown in
FIG. 2
, the color selecting electrode
13
comprises a metal thin plate
14
having vertical stripe-shaped opening portions
14
a
to serve as a grid and a metal frame
15
(
15
a
,
15
b
) for giving a proper tension to the metal thin plate
14
.
To the frame members
15
a
,
15
b
are secured springs
16
b
of long plate shape through holders
16
a
as supporting members
16
. The color selecting electrode
13
are supported at four points by the engagement between apertures
16
c
of the spring
16
b
and pins
17
of the panel
11
. In
FIG. 2
, reference numerals
20
designate bimetal members for correcting a so-called mislanding of an electron beam due to a thermal expansion of the color selecting electrode
13
.
In the example of the conventional cathode ray tube, the springs
16
b
are fixed to the opposing frame members
15
a
,
15
b
in the opposite directions so that the color selecting electrode
13
is twisted due to various factors. As a consequence, a so-called landing twist occurs in an electron beam emitted from the electron gun
18
.
OBJECTS AND SUMMARY OF THE INVENTION
In view of the aforesaid aspects, it is an object of the present invention to provide an improved cathode ray tube in which the aforesaid shortcomings and disadvantages encountered with the related art can be eliminated.
More specifically, it is an object of the present invention to provide a cathode ray tube in which a color selecting electrode can be prevented from being twisted so that a deviation of an electron beam can be suppressed considerably.
According to an aspect of the present invention, there is provided a cathode ray tube which comprises a face plate panel having a plurality of pins, a frame, a color selecting electrode mounted on said frame, and a plurality of supporting members being engaged with said pins, and joining with said frame at least opposed two of said supporting members joining perpendicular to the plane of said frame plate panel.
The above and other objects, features, and advantages of the present invention will become apparent from the following detailed description of illustrative embodiments thereof to be read in conjunction with the accompanying drawings, in which like reference numerals are used to identify the same or similar parts in the several views.


REFERENCES:
patent: 4455505 (1984-06-01), Ragland, Jr.
patent: 4547695 (1985-10-01), Rath
patent: 4827180 (1989-05-01), Sone et al.
patent: 5012154 (1991-04-01), Ragland, Jr.
patent: 5189334 (1993-02-01), Park
patent: 5247224 (1993-09-01), Bae
patent: 5410215 (1995-04-01), Seo
patent: 0276838 (1988-08-01), None
patent: 0 325 207 A2 (1989-07-01), None

Affiliated with

Also associated with

Rating

Cathode ray tube having a fag with spring holder does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cathode ray tube having a fag with spring holder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cathode ray tube having a fag with spring holder will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2477790