K-G1 electrode spacing system for a CRT electron gun

Details K-G1 electrode spacing system for a CRT electron gun K-G1 electrode spacing system for a CRT electron gun

1993-06-16

1994-03-22

Bradley, Paula A.

Electric lamp or space discharge component or device manufacturi

Apparatus

Testing or adjusting means

445 67, H01J 918, H01J 942

Patent

active

052958876

ABSTRACT:
A K-G1 spacing apparatus provides for spacing the dispenser cathode of a CRT electron gun a desired distance from an adjacent apertured grid electrode known as "G1." A probe has an outer shaft with a shoulder for registering with the G1 electrode. The probe includes an inner shaft having a tip on one end for contacting the face of the cathode, and at the opposite end, a linear velocity differential transformer (LVDT). When the cathode contacts the tip of the probe, the LVDT produces an electrical signal which is indicated on a calibrated column, and which denotes the location of the cathode face relative to the G1 electrode. When the desired K-G1 spacing has been attained, the cathode is fixed in permanent relationship with the G1 electrode.

REFERENCES:
patent: 2872609 (1959-02-01), Wheeler
patent: 3533147 (1970-10-01), Baur et al.
patent: 3667824 (1972-06-01), Tsuneta et al.
patent: 3848301 (1974-11-01), Gruber
patent: 4846748 (1989-07-01), Cote
patent: 4850920 (1989-07-01), Cote
patent: 4898559 (1990-02-01), Cote

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