Electron gun assembly having a reinforced heater tab

Details Electron gun assembly having a reinforced heater tab Electron gun assembly having a reinforced heater tab

1987-08-31

1988-12-06

Moore, David K.

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313337, 313269, 313270, 313456, H01J 2946, H01J 194

Patent

active

047898070

ABSTRACT:
An electron gun assembly for use in a CRT includes a pair of insulating support rods, at least one indirectly heated cathode disposed between the support rods, a heater for the cathode and an improved heater tab. The heater includes a pair of heater legs which are attached to the heater tab. Heater bead straps are provided for attaching the heater tab to the support rods. The electron gun also includes a plurality of electrodes for focusing and accelerating an electron beam generated by the cathode. The improved heater tab comprises a main body portion including a first and a second part. Each of the parts is attached to one of the heater legs. The heater tab has a pair of outwardly directed feet each of which is connected to one of the parts of the main body portion by a pair of substantially orthogonal legs extending therebetween. The heater tab includes reinforcing gussets extending between the parts of the main body portion and the legs and between the legs and the feet to maintain the rigidity of the heater tab.

REFERENCES:
patent: 3555640 (1971-01-01), Lundvall, II
patent: 3973163 (1976-08-01), Collins
patent: 4049991 (1977-09-01), Collins
patent: 4251746 (1981-02-01), Kawamura et al.
patent: 4403169 (1983-09-01), Blanken
patent: 4484102 (1984-11-01), Hale
patent: 4486685 (1984-12-01), Hale et al.
patent: 4523124 (1985-06-01), Blanken et al.
patent: 4595858 (1986-06-01), Hale

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