Patent ID: 7982568
Filing Date: 2011-07-19
Classification: E05B,E05C,G06F,H01F

Abstract:
1. A multilevel correlated magnetic system, comprising: a first correlated magnetic structure including a first portion which has a plurality of coded magnetic sources and a second portion which has one or more magnetic sources; a second correlated magnetic structure including a first portion which has a plurality of complementary coded magnetic sources and a second portion which has one or more magnetic sources; wherein the first correlated magnetic structure is aligned with the second correlated magnetic structure such that the first portions and the second portions are respectively located across from one another; and wherein the first portions each produce a higher peak force than the second portions while the first portions each have a faster field extinction rate than the second portions such that (1) the first portions produce a magnetic force that is cancelled by a magnetic force produced by the second portions when the first and second correlated magnetic structures are separated by a distance equal to a transition distance, (2) the first portions produce a stronger magnetic force than the magnetic force produced by the second portions when the first and second correlated magnetic structures have a separation distance from one another that is less than the transition distance, and (3) the first portions have a weaker magnetic force than the magnetic force produced by second portions when the separation distance between the first and second correlated magnetic structures is greater than the transition distance.