Patent ID: 6060969
Filing Date: 2000-05-09
Classification: H03K

Abstract:
A contactless proximity switch for detecting a predefined spacing distance between a first part and a second part movably disposed relative to one another, comprising:a first part carrying a magnetic angle sensor for sensing a magnetic field direction and supplying a sensor output signal dependent on a direction of the magnetic field acting on said angle sensor;a second part movably disposed relative to said first part and carrying a driver magnet generating a driving magnetic field;said angle sensor being subject to an original state field direction when said first and second parts are spaced from one another at a distance other than a predefined spacing distance, and the driving magnetic field effecting in said angle sensor a switching state field direction different from the original state field direction when said first and second parts are spaced from one another at the predefined spacing distance; andsaid angle sensor being subjected to a biasing magnetic field defining the original state field direction.