Text: My invention is based upon the fact hitherto unknown, that there exists in the magnetic field or field of attraction of every magnet, at a greater or less distance from the magnet, what I term a neutral line at which soft iron will not be polarized, or magnetized, by the inductive action of the magnet. The location of the neutral line as regards its distance from the magnet differs in different cases, the line approaching the magnet in proportion to the increase in strength of the magnet and receding as the size or cubic contents of the armature is increased. The location of the line may be readily determined by applying a coil and galvanometer to the iron and moving it to and from the magnet; or by applying a dipping needle to the armature and noting the point at which the needle assumes a horizontal position or by allowing a tack or other small piece of iron to adhere to the armature and noting the point at which the tack is released by the same. I have discovered that iron placed on this line although subject to a strong attractive influence on the part of the magnet, remains unpolarized, but that upon moving it from the line in either direction it instantly assumes a polarity. I have also discovered that the polarity of the iron differs on opposite sides of the line and changes on crossing the same, so that if the iron placed in close proximity to the magnet and polarized, by induction, be carried outward, it will lose polarity on reaching the neutral line, and then assume a reverse polarity as it passes from the line outward. By availing myself of this fact and arranging the armature to vibrate from the neutral line inward, or from the neutral line outward, or to work across the line, and in connection with a commutator, I secure the required changes in the polarity of the armature and produce the same results by a very short movement that are now secured by the longer one. In constructing machines and instruments on my plan, the details may be constructed and arranged in any manner desired provided the armature has the above described action in relation to the magnet. The best results are secured by using a horse-shoe magnet, compound if desired, extending the armature across its two poles on one side, and then arranging the armature to move only between the neutral line and the magnet. Gary Patent http://www.rexresearch.com/gary/gary1.htm

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