Safety switch for monitoring a closed position of two parts moveable relative to one another
First Claim
1. A safety switch for monitoring a closed position of a guard door in an automated installation, said guard door comprising a fixed part and a moveable part, and the safety switch comprising:
- an actuator and a sensor each adapted to be secured to one of the parts, wherein the actuator has a transponder including an actuator antenna and the sensor has a sensor antenna, wherein the antennas are configured to establish a transponder coupling, when the parts are in the closed position, and wherein the sensor antenna has a magnetic directional characteristic which allows the transponder coupling in at least two spatial directions that are mutually perpendicular seen from the sensor antenna.
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Accused Products
Abstract
A safety switch, which is particularly intended for monitoring a guard door on an automated installation, has an actuator and a sensor. The actuator comprises an actuator antenna and the sensor comprises a sensor antenna. The actuator and the sensor are coupled to one another like a transformer, in particular like a transponder, when the guard door is in the closed position. According to one aspect of the invention, the sensor antenna has a magnetic directional characteristic which allows transformer coupling with the actuator in at least two mutually perpendicular spatial directions as seen from the sensor antenna.
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Citations
23 Claims
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1. A safety switch for monitoring a closed position of a guard door in an automated installation, said guard door comprising a fixed part and a moveable part, and the safety switch comprising:
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an actuator and a sensor each adapted to be secured to one of the parts, wherein the actuator has a transponder including an actuator antenna and the sensor has a sensor antenna, wherein the antennas are configured to establish a transponder coupling, when the parts are in the closed position, and wherein the sensor antenna has a magnetic directional characteristic which allows the transponder coupling in at least two spatial directions that are mutually perpendicular seen from the sensor antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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- 14. A safety switch for monitoring an adjacent position of two parts which are moveable relative to one another, comprising an actuator and a sensor each adapted to be secured to one of the parts, wherein the actuator has an actuator antenna and the sensor has a sensor antenna, wherein the antennas are configured to establish a defined transformer coupling, when the parts are in the adjacent position, and wherein the sensor antenna has a magnetic directional characteristic which allows the defined transformer coupling in at least two spatial directions that are mutually perpendicular seen from the sensor antenna.
Specification