Getter arrangement having a getter detector and a post-heating t

Details Getter arrangement having a getter detector and a post-heating t Getter arrangement having a getter detector and a post-heating t

1988-12-01

1989-11-21

Rowan, Kurt

Electric lamp or space discharge component or device manufacturi

Apparatus

Having evacuation or degasification means or means to...

445 19, 445 55, 445 63, H01J 718

Patent

active

048819140

ABSTRACT:
In a getter arrangement for providing a getter spot on the walll of an evacuated space, for example an electron tube, the power transfer can be of too short or too long a duration (for example because of positional inaccuracies of the holder containing the getter material or inaccuracies in the shape or composition of the wall). In the first case the intended quality of the getter process is not obtained, in the second case the electron tube may get damaged. A control unit measures the duration of the time interval which starts at the beginning of the power transfer and ends at the instant the getter spot is created. This instant is determined by a detector which detects the getter spot. After this instant the control unit continues the power transfer during a further time interval whose length depends on the first time interval. Consequently, the duration of the transfer depends on the behaviour of the gettering process, which improves the quality of the gettering process and prevents damage to the tube.

REFERENCES:
patent: 2979371 (1961-04-01), Spalding
patent: 4302063 (1981-11-01), Rudy
patent: 4494042 (1985-01-01), Roche
patent: 4516945 (1985-05-01), Martelli
patent: 4584449 (1986-04-01), Timmons
patent: 4668203 (1987-05-01), Giudici

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