MAGNETIC PROXIMITY DEVICE

摘要

A proximity device comprises a pair of connected magnets that are movable with respect to a magnetizable member located intermediate the magnets and secured in a housing. The magnets are arranged to provide a high rate of change of force between the magnets and the member as the magnets are moved by the approach of retreat of a magnetizable operator to or from an area adjacent one of the magnets and remote from the magnetizable member between the magnets.