Devacuate

Upon breakage the envelope is permitted to devacuate contrallably without deleterious fragmentation of its side walls.

First acquire a defunct oscilloscope C.R.T. of the flat face variety and devacuate it. The method I used to devacuate is as follows : First wrap the C.R.T. in a blanket, with only the extreme socket end exposed. Next, with the base pointed away from yourself, gently file a minute hole in the evacuation nipple of the C.R.T. If this is done carefully, devacuation will occur...

With these implosion systems, breakage of the faceplate causes the tube to devacuate quietly and safely without a violent implosion.

With these implosion systems, breakage of the faceplate causes the tube to devacuate without a violent implosion. The implosion safety front panel may be etched on its exterior surface, producing a ground-glass effect […]