Contactless safety switch
First Claim
1. A contactless safety switch for detecting the shut position of a shutting part in relation to a closeable part, comprising:
- a switch unit, supplied with current by an electrical supply source on one of said parts; and
a trip arranged on the other part and comprising a magnet;
wherein said switch unit comprises a transmission circuit with a clock-signal generator and with a transmission coil;
wherein said switch unit further comprises a receiver circuit connected to an evaluation unit and having at least one receiver coil; and
wherein said switch unit also comprises a Hall sensor responding to the magnet;
said trip comprising a trip coil which, in the shut position, is capable of being excited inductively by a transmission coil and exciting the receiver coil, whilst, in the shut position, the evaluation unit, after comparing the transmitted and received clock signals, triggers a clearance path when the Hall sensor is activated via the magnet.
1 Assignment
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Accused Products
Abstract
The invention relates to a contactless safety switch for detecting the shut position of a shutting part in relation to a closeable part, with a switch unit, supplied with current by an electrical supply source on one of the parts and with a trip arranged on the other part and comprising a magnet. In this case, the switch unit comprises a transmission circuit with a clock-signal generator and with a transmission coil, a receiver circuit connected to an evaluation unit and having at least one receiver coil and also a Hall sensor responding to the magnet, and the trip comprises a trip coil which is capable, in the shut position, of being excited inductively by the transmission coil and exciting the receiver coil, while, in the shut position, the evaluation unit triggers a clearance path when the Hall sensor is activated via the magnet.
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Citations
24 Claims
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1. A contactless safety switch for detecting the shut position of a shutting part in relation to a closeable part, comprising:
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a switch unit, supplied with current by an electrical supply source on one of said parts; and
a trip arranged on the other part and comprising a magnet;
wherein said switch unit comprises a transmission circuit with a clock-signal generator and with a transmission coil;
wherein said switch unit further comprises a receiver circuit connected to an evaluation unit and having at least one receiver coil; and
wherein said switch unit also comprises a Hall sensor responding to the magnet;
said trip comprising a trip coil which, in the shut position, is capable of being excited inductively by a transmission coil and exciting the receiver coil, whilst, in the shut position, the evaluation unit, after comparing the transmitted and received clock signals, triggers a clearance path when the Hall sensor is activated via the magnet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification