Time-Bubble
From superman.nu: Supermanica
Time-Bubble
A temporal transportation device provided to the Legion of Super-Heroes by the organization's founder R.J. Brande (first appearance, Adv No. 247, Apr 1958: "The Legion of Super-Heroes!"). Normally set to journey 1,000 years into the past (the time of Superboy), the 30th century technological marvel does have controls that enable trips to all past and future timelines. Initially, only one Time-Bubble exists, later, others are constructed, as well as the similar Time-Cubes.
