Method for spot-knocking an electron gun mount assembly of a crt

Details Method for spot-knocking an electron gun mount assembly of a crt Method for spot-knocking an electron gun mount assembly of a crt

1989-03-29

1989-11-28

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

Including use of electric arc or current for removing an...

H01J 944

Patent

active

048834378

ABSTRACT:
The novel spot-knocking method for an electron gun mount assembly having a gun axis in an evacuated CRT comprises interconnecting a heater, a cathode, a control electrode and a screen electrode. Then, providing a magnetic field along the gun axis while applying spot-knocking voltages between an anode and the interconnected gun elements. The magnetic field facilitates the initiation of arcs parallel to the magnetic field and to the gun axis and between the adjacent gun elements, and inhibits the initiation of arcs in directions transverse to the magnetic field and the gun axis.

REFERENCES:
patent: 3323854 (1967-06-01), Palac
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patent: 4052776 (1977-10-01), Maskell et al.
patent: 4214798 (1980-07-01), Hopen
patent: 4326762 (1982-04-01), Hockenbrock et al.
patent: 4515569 (1985-05-01), Hernqvist
patent: 4682963 (1987-07-01), Daldry et al.
patent: 4764704 (1988-08-01), New et al.

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