The Anti-Gravity Gadget was a makeshift machine built by Gyro Gearloose.
Description[]
This machine was built by Gyro out of Scrooge McDuck's portable tape machine and Elvira Duck's cylinder gramophone, the only two mechanical devices on hand, to attempt to carry Grandma Duck's Farm back where it belonged after a twister blew it into the Amazonian jungle.
The first form of the device was an all-out anti-gravity device, but was not powerful enough to lift the farm for more than a few seconds at a time, as the inventor didn't have access to such necessary components as a Supergizmo Oscillator or a Self-Reciprocating Condensibobble. Gyro continued to work on the machine, and eventually made it create a miniature, controllable twister beneath the farm that would carry it into the air.
Behind the scenes[]
The Anti-Gravity Gadget appears in the 1960 story Family Fun.