The phrase "a time machine for" is correct and usable in written English.
It can be used in contexts where you are metaphorically describing something that allows for a change in perspective or a return to a previous state or time.
Example: "This book serves as a time machine for those who wish to revisit the past and understand the events that shaped our world."
Alternatives: "a portal to" or "a gateway for".
The small, old-fashioned radio at the entrance was a time machine for my father, Lester Bernstein, 92, who was getting a preview of the "World War II & NYC" exhibition at the New-York Historical Society. New-York Historical Society
While I'm too young to have ever seen him play, his statistics are so mind-blowing that I wish I had a time machine for the express purpose of going back and seeing him in action.
Children would see names like "Were I an Elephant," adolescents would receive something like "A Time Machine for an Hour," and adults would tackle topics such as "The World from an Insect's Point of View".
Building a time machine for Mars.
Named to honor Jules Verne's science fiction, the Vulcania is a time machine for the imagination.
The startup caught the audience's attention based on a simple value proposition: To become a "time machine for your website".
The story of two Californian slackers with a time machine who, for complicated reasons, have to assemble assorted celebrities from history in order to pass a high-school project, it is chiefly remembered for bringing Keanu Reeves to the attention of a mass audience.
One episode of La Hora Marcada shared Del Toro's take on a Soylent Green-inspired restaurant serving human meat, a time machine used for colonization, zombies meeting up at a fast food restaurant, and an alien invasion.
Another bit of magical realism is "Safety Not Guaranteed," a romantic comedy about a guy trying to build a time machine and looking for a partner to help him do it.
That is true; but unless one has a time machine that allows for changing history, it is hard to see what that has to do with preventing crimes like the one in Aurora.
So when Improv Everywhere concocted a scenario on the subway in which a man from the future warns passengers not to give his present self money for a time machine, commuters gladly went along for the ride.
