Redheffer moved to New York City and set up a similar scam after rebuilding his machine. However, an engineer detected that it was a fake by listening to its unsteady motions at an exhibition. He discovered that the machine was operated by a man using a crank in a room on the floor above. Redheffer returned to Philadelphia. He later claimed to have created another machine, but refused to demonstrate it to anyone. He managed to get a patent for his machine in 1820, but after this his fate is unknown.