Design and Function
The Jukes Gravic Downmaster could eliminate free-fall in any space vehicle except where it was wanted. It had wide customization, able to fine-tune the level of artificial gravity created.
Along with the advent of Gravitics, Juke Limited created the Downmaster several years before the First Formic War. By 100 BX, some ships and stations had artificial gravity, but whether they used the Downmaster device specifically or not is unknown.