United States Patent
4,151,431
Johnson; Howard R.
3300 Mt. Hope Rd.,
Grass Lake, MI 49240

Filed: December 6, 1973

“Preferably, a plurality of armature magnets are used which are staggered with respect to each other in the direction of armature magnet movement. Such an offsetting or staggering of the armature magnets distributes the impulses of force imposed upon the armature magnets and results in a smoother application of forces to the armature magnet producing a smoother and more uniform movement of the armature component.”