This is straight out of wikipedia check this out
Die Glocke (German for "The Bell") is the name of a purported top secret Nazi scientific technological device. The only source for this is the books of Polish aerospace defence journalist[1] and military historian[2] Igor Witkowski, which claim it to be a secret weapon, or Wunderwaffe. The topic has been popularized by Nick Cook, Joseph P. Farrell and conspiracy theory websites, associating it with Nazi occultism and antigravity or free energy research.
Also of wikipedia
The device was first claimed to exist by Igor Witkowski, in his Polish language book Prawda O Wunderwaffe (2000, reprinted in German as Die Wahrheit über die Wunderwaffe), in which he refers to it as "The Nazi-Bell". Little was known or reported on regarding the device until it was popularized in the English-speaking Western world by Jane's Information Group's British aviation editor, journalist and author Nick Cook, in his book The Hunt for Zero Point. Interest grew, and Witkowski's book was translated into English in 2003 by Bruce Wenham as The Truth about the Wunderwaffe. Information about the device has been further spread and speculated on in works of American authors Joseph P. Farrell, Jim Marrs, Henry Stevens and James Rollins.
"The Bell" has become something of a legend among believers in zero-point energy, perpetual motion machines, anti-gravity devices, reality shifting, reanimation, and time-space manipulation.
-KILL3R