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US 2003/0111300 A1Published application
Monitoring device for an elevator
AssigneeInventio AG
InventorKilian Schuster
Life of this patent
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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.
Claims10
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 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 central checking unit connected with said at least two switching devices in a safety chain for the elevator.
A method of monitoring a safety chain of an elevator comprising the steps of:
- 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 unit upon receiving the pattern;
- and
- e. receiving the response from the associated passive unit with the associated active unit.
3 more elements
Dependencies are inferred from the claim text.