Contactless switching device for an elevator safety chain
First Claim
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1. A monitoring device for an elevator comprising:
- at least two contactlessly actuatable switching devices, each said switching device including an active unit and a passive unit wherein said active unit generates a predetermined pattern as a bit pattern or a bit sequence and said passive unit is excited exclusively by said predetermined pattern, said passive unit being excited by said predetermined pattern at a defined spacing between said active unit and said passive unit; and
a bus connecting a central checking unit with said at least two switching devices in a safety chain for the elevator.
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Abstract
A monitoring device for an elevator includes a plurality of switching devices connected in a series safety chain. Each switching device has an active unit generating a pattern and a passive unit that responds to the pattern within a defined spacing between the units.
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Citations
13 Claims
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1. A monitoring device for an elevator comprising:
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at least two contactlessly actuatable switching devices, each said switching device including an active unit and a passive unit wherein said active unit generates a predetermined pattern as a bit pattern or a bit sequence and said passive unit is excited exclusively by said predetermined pattern, said passive unit being excited by said predetermined pattern at a defined spacing between said active unit and said passive unit; and
a bus connecting a central checking unit with said at least two switching devices in a safety chain for the elevator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 11, 13)
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9. A method of monitoring a safety chain of an elevator comprising the steps of:
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a. providing a plurality of switching devices and a central checking unit connected in a safety chain for an elevator, each of the switching devices having an active unit and a passive unit associated with one another;
b. generating a pattern from each of the active units;
c. receiving the pattern from each of the active units with the associated one of the passive units when the associated passive unit is at a defined spacing from the associated active unit;
d. generating a response from the associated passive writ upon receiving the pattern; and
e. receiving the response from the associated passive unit with the associated active unit. - View Dependent Claims (10)
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12. A monitoring device for an elevator comprising:
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at least two contactlessly actuatable switching devices, each said switching device including an active unit and a passive unit wherein said active unit generates a predetermined pattern as a bit pattern or a bit sequence and said passive unit is excited exclusively by said predetermined pattern, said passive unit being excited by said predetermined pattern at a defined spacing between said active unit and said passive unit to generate a response pattern to said active unit and a central checking unit connected with said active units of said at least two switching devices in a safety chain for the elevator for receiving the response patterns.
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Specification