Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
117 words
An inline electron gun (26;26') for use in a cathode-ray tube (8), said gun including in spaced relation, in the order named, a plurality of cathodes (34), a control grid (36), screen grid electrode means (38;38'), and at least two main focus lens electrodes (40;42); characterized in that said screen grid electrode means includes two spaced apart metal members (G2a,G2b;G2a',G2b'), at least one of said members (G2a;G2b') having a plurality of elongated rectangular slots (52;62) formed in one surface thereof, said slots having a depth less than the thickness of said member and facing the other of said members (G2b;G2a'), and a plurality of circular apertures (54;64) that communicate with said slots and extend through said member.
Claim 2
Dependent Claim
117 words
An inline electron gun (26;26') for use in a cathode-ray tube (8), said gun including in spaced relation, in the order named, a plurality of cathodes (34), a control grid (36), screen grid electrode means (38;38'), and at least two main focus lens electrodes (40;42); characterized in that said screen grid electrode means includes two spaced apart metal members (G2a,G2b;G2a',G2b'), at least one of said members (G2a;G2b') having a plurality of elongated rectangular slots (52;62) formed in one surface thereof, said slots having a depth less than the thickness of said member and facing the other of said members (G2b;G2a'), and a plurality of circular apertures (54;64) that communicate with said slots and extend through said member.
Claim 3
Dependent Claim
60 words
The electron gun (26) of Claim 1, wherein said spaced apart members of said screen grid electrode means (38) include a first member (G2a) adjacent to said control grid (36) and a second member (G2b) located between said first member and said main focus lens electrodes (40,42), said first member having said elongated rectangular slots (52) facing said second member.
Claim 4
Dependent Claim
60 words
The electron gun (26') of Claim 1, wherein said spaced apart members of said screen grid electrode means (38') include a first member (G2a') adjacent to said control grid (36) and a second member (G2b') located between said first member and said main focus lens electrodes (40,42), said second member having said elongated rectangular slots (62) facing said first member.
Claim 5
Dependent Claim
23 words
The electron gun (26;26') of Claim 2 or 3, wherein said rectangular slots (52;62) are elongated in the inline direction of said gun.
Claim 6
Dependent Claim
27 words
The electron gun (26) of Claim 2, 3 or 4, wherein said first member (G2a) has a thickness greater than that of said second member (G2b). -
Claim 7
Dependent Claim
25 words
The electron gun of Claim 5, wherein the said first member (G2a) has a thickness of about 4 times that of the second member (G2b).
Claim 8
Dependent Claim
25 words
The electron gun (26;26') of claim 2, 3, 4, 5 or 6 wherein a modulation voltage is applied to said screen grid second member (G2b;G2b').
Claim 9
Dependent Claim
59 words
A cathode raytube comprising an electron gun according to Claim 6, for producing a plurality of electron beams, beam deflection means, and means for applying to the first member (G2a) a dynamic signal which modulates the cross-sectional shape of each electron beam passing through the first member according to the deflection of the beam in the cathode ray tube.
Claim 10
Dependent Claim
93 words
The electron gun of Claim 1; wherein each of said metal members (G2a,G2b) of said screen grid electrode means (38) has a plurality of elongated rectangular slots formed in one surface thereof, said slots having a depth less than the thickness of said members and facing the other of said members, and a plurality of circular aperatures (54) being formed in each of said members that communicate with said slots and extend through said members, said slots in one of said members being orthogonal to said slots in the other of said members.