time barrier n.

The temperator is capable of affecting the time over a certain limited area in such a manner that it will be removed and we will advance through time…. We tear down the time barrier that lies between us and to-morrow, or next week, or the next century. It is easily and quickly done, and I can control the force over quite a large area. All that is necessary is to start the dynamo, and at once we shoot through time.

When you tested it, it broke down the time barrier you had erected for protection.

The Stella was…building up speed for the instant of transmission which would hurl her through the time-barrier.

I’ve lost track of the number of letters that have reached me demanding, ‘Why can’t you go faster than light?’… ‘What makes you think that someday we won’t break the time barrier?’

The amount of energy needed to make the initial breach of the formidable time barrier had proven enormous.

‘So you do not believe that Mitric Galvadon has broken the time barrier?’ ‘Time travel is impossible.’