I found the following KeelyNet reference to Sprain's motor. You will notice that he is referred to as Paul Harry Sprain, not Harry Paul Sprain as in the Wiki article and the patent.
Sprain seems to be a remarkably uncommon name. It is probably a corruption of Strain. 8-) http://www.freshpatents.com/Apparatus-and-process-for- generating-energy-dt20060209ptan20060028080.php ============================================ 02/28/06 - Overunity magnet motor claim This is the first OVERUNITY magnet motor released to the public! It produces more mechanical power than needed electrical input power for the electromagnet. It is the video from Mr. Paul Harry Sprain. I had signed NDA for it and now he has released it to the world! It is simular to the Takahaski design and Mr. Sprain has got a patent for it. The electromagnet at the end of the spiral stator switches for just a few Mikroseconds the field to zero flux density, so the rotor can escape the stator fields. For the rest of the rotation circle the rotor is purely accelerated into the track. All magnets are in attraction mode, stator and rotor magnets ! This is so far the best magnet motor shown. Mr. Sprain wrote: I have been working on this project for 4 years. I have spent a little under a million dollars. I have a patent and a working prototype (see attached photos). The rotational force is measured using a torque sensor that allows me to put it under load just like a real generat! or. I have measured the energy going into the electromagnet voltage and current. It comes from a digital power supply so there is no guessing as to what is being used. I'm using a super perm alloy core for the electromagnet. A digital encoder controls the firing of the electromagnet. My results: out-.6 Nm at 10 radian/sec =6W in-19.8v @ 1.9A = 37.62W each pulse is .028ms = 1.05 W per pulse 3 pulses per/sec = 3.1W total input. Please see patent 6,954,019. Some additional info about this remarkable claim. For more details on the Takahashi magnetic spiral motor. ============================================ There is also a photo and diagram accompanying the above text at: http://www.keelynet.com/ Frank
