Device for localization of a door breakdown
AssigneeOtis Elevator Company
InventorsGerard Sirigu, Pascal Rebillard
Life of this patent
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Abstract
The invention concerns a device for localizing a closing fault in landing doors equipped with locks that are electrically connected series. The localizing device includes a number of electric impedances (R0, R1, R2 . . . Rn) respectively mounted in parallel with said locks (120, 121, 122 . . . 12n), measuring devices (42, 44) for measuring the total impedance of the safety chain, microprocessor (46) which allow to compare said measured impedance with a cross reference table of floor impedances that provides all the impedance values of the safety chain obtained by opening one or the other of the landing doors, and display (48) which show the floor or floors on which the breakdown occurred.
Claims9
A device for localizing a closing fault in a landing door equipped with locks in an elevator installation of several floors, where said installation is equipped with an electrical safety chain (31) which connects said locks in series, said device being characterized in that it comprises:
- a number of electrical impedances mounted respectively in parallel with said locks, where said impedances have specific values which differ from each other,
- means for measuring the total impedance of the safety chain,
- means which allow to compare said measured impedance with a floor-impedance cross reference table containing all the impedance values of the safety chain, wherein the floor on which the closing fault occurred is the one where the measured impedance matches an impedance of the table, and
- and means for communicating the floor or floors on which the breakdown occurred.
Dependencies are inferred from the claim text.