A significant event deserving recognition this year is the 100th anniversary of Nikola Tesla's momentous exhibit at the 1893 Chicago Columbian Exposition. It was 100 years ago at this world's fair that Tesla and George Westinghouse first introduced the American public to the alternating current electrical power system. Among the exhibits was a novel demonstration known as the "Egg of Columbus" used to explain the principal of the rotating magnetic field and the induction motor. A reproduction of this device, presently on display at the Belgrade Nikola Tesla Museum, is shown in operation below.
NIKOLA TESLA JAJE
Tesla's Egg was a polphase inductive motor that spun a copper egg on end ...
The Egg of Columbus The story behind Nikola Tesla's "Egg of Columbus" is that it was a trick that he devised to win a bet about being able to make an egg stand on end. The terms of the bet were quite simply venture-capital assistance to develop some of his earlier projects. Not only did the Egg of Columbus stand on it -- it did so while rotating at an enormously high-speed! Tesla won the bet, and secured the venture capital. Tesla's Egg was essentially a form of a polyphase electric motor -- the copper coated egg was inductively charged and spun similarly to the winding in a conventional AC motor. James Corum published a speculative piece in which he postulated that Tesla's Egg may have been the precursor to the field-layout of the Philadelphia Experiment, due to the arrangement of the coils and unique polyphase variant-design. The following link leads to additional resources and photos of the Egg of Columbus -- it was contributed by Paul Easter
Original poster: "Bert Hickman by way of Terry Fritz <twftesla-at-qwest-dot-net>" <bert.hickman-at-aquila-dot-net> Wade, Terry, and all, The best description I've seen is from a Lindsay Publications reprint: "Strange Stories from Electrical Experimenter Magazine, 1917-1919". The article originally appeared in the March, 1919 edition. Tesla used iron core(s) or a single toroidal core around which 4 coils were wound. These were energized from a 2-phase AC source to create a rotating magnetic field. A 6-coil, 3-phase system would work just as well. Tesla varied the frequency from 25 to 300 hertz from a powerful alternator driven at variable speed, getting best performance at 35-40 hertz. The "eggs" were made from copper and were either egg shaped or spherical. The egg revolves around its major axis. I've scanned in the pertinent sections of the book and put them on my web site. The following jpegs cover it fairly well:
Serbian Tesla Conference
While the United States has seen little in 1993 by way of an observance of the 50th year since Nikola Tesla's death, this is hardly the case in the former Yugoslavia. Late in September, a volatile political atmosphere notwithstanding, the Nikola Tesla Museum in conjunction with the Serbian Academy of Sciences and Arts held a Teslianum conference in Belgrade and Novi Sad. Among the speakers who braved the circumstances to attend were Ken Corum and Rastko Maglic, two individuals active in Tesla related research in our own country. In the Balkans, another sign of the ongoing interest in the famous inventor is seen with the issuance of a 50th Anniversary Commemorative Stamp by the Croatian Post and Telecommunications service. For information about obtaining specimens of the stamp, try addressing an inquiry this private dealer:
Dimensions: 75 x 66 x 10 cmA device for demonstrating the activity of a rotating magnetic field. It was Tesla's most significant discovery, enabling the use of alternating current. The replica was manufactured in 1976 at the Museum, based on Tesla's original (New York, 1888). It was a popular way of demonstrating one of the rotating magnetic fields's effects which Tesla used on the 1893 World Expo in Chicago, by placing a metal egg to stand on the top through rotation. The model, intended for demonstration purposes, may also serve for a number of other tests.
48. ON OUR NATURE. It is proper to say: we appear to be memory coils (DNA carriers capable of experience) in a computer-like thinking system which, although we have correctly recorded and stored thousands of years of experiential information, and each of us possesses somewhat different deposits from all the other life forms, there is a malfunction - a failure - of memory retrieval. There lies the ttrouble in our particular subcircuit. "Salvation" through gnosis - more properly anamnesis (the loss of amnesia) - although it has individual significance for each of us - a quantum leap in perception, identity, cognition, understanding, world- and self-experience, including immortality - it has greater and further importance for the system as a whole, inasmuch as these memories are data needed by it and valuable to it, to its overall functioning.