The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 03, 2018
Filed:
Jul. 31, 2015
Inventio Ag, Hergiswil, CH;
Vincent Robibero, Randolph, NJ (US);
INVENTIO AG, Hergiswil, CH;
Abstract
A deterioration state of load bearing capacity in an elevator suspension member having a plurality of electrically conductive cords is detected by: providing a multi-phase alternating current circuitry including electrically conductive legs; applying at least one phase of a multi-phase alternating current to at least one of the cords electrically connected to one of the legs; applying at least another phase of the current to at least another cord and at least one resistor electrically connected to at least another leg; measuring an electric indicator current being at least one of a net sum of all phases of the current and an electric bypass current through a neutral wire being connected in parallel to the circuitry, wherein a peak current in each phase is shifted by a phase angle with respect to a peak current in another phase; and determining the deterioration state based on the measured indicator electric current.