Time Window

The Time Window was a triangular device of Quintesson design that opened a window into time... what did you think it was?

Generation 1 cartoon
The Quintessons built a Time Window on a remote asteroid with the attention of mucking up the timeline by capturing A3 before the Autobot rebellion entered full swing. The intention of course was to prevent the Quintessons from abandoning Cybertron to the Transformers thus ensuring that they remained in control.

Unfortunately, as was the case with most evil plans, the Quintessons experiments attracted Autobot attention and their base was attacked. This resulted in Wreck-Gar, Blaster, Ramhorn, Rewind and Blurr getting lost in the past... more specifically, during Quintesson era Cybertron where they aided thir ancestors in rebelling against their tyrannical rulers.