Cathode heater structure of an electric gun for a cathode-ray tu

Details Cathode heater structure of an electric gun for a cathode-ray tu Cathode heater structure of an electric gun for a cathode-ray tu

1993-05-12

1995-03-07

Coles, Sr., Edward L.

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313337, H01J 2904

Patent

active

053961471

ABSTRACT:
This invention provides a method of positioning and assembling in place cathode heaters of an electron gun for a cathode-ray tube, thereby resulting in improvements in assembling workability and in the white balance characteristic on the screen of the tube. A cathode heater structure includes a cathode heater and a heater supporter. The cathode heater includes a heat generating portion and a pair of leg portions extending from the heat generating portion. Each leg portion is formed with a bent engaging portion at its end. The heater supporter has guide grooves for receiving the engaging portions of the cathode heater to guide and position them. According to the method of the present invention, the cathode heaters are shot in sequence into the guide grooves of the heater supporter by means of shooters, and then the leg portions of the heaters caught and positioned in the guide grooves are welded to the guide grooves.

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