A method for checking the integrity of a load bearing member of an elevator including tensile elements encapsulated in a case includes the steps of launching a source pulse through tensile elements of said load bearing member and comparing the feedback of said tensile elements with a comparator; tensile elements can be bridged to avoid a blind zone.

A belt for an elevator system includes a plurality of tension members arranged along a belt width and extending longitudinally along a length of the belt, each tension member including a plurality of fibers. A metallized coating layer is applied to at least a portion of an outer surface of at least one tension member of the plurality of tension members. The metallized coating has a coating electrical conductivity greater than a tension member electrical conductivity of the at least one tension member. A jacket material at least partially encapsulates the plurality of tension members and the metallized coating layer.

An elevator belt monitoring apparatus includes a housing for receiving an elevator belt and a plurality of screws or pins which are operable to pierce the belt and the spaced parallel cords arranged within the belt. One screw or pin engages each cord. A plurality of bridge contacts are connected with adjacent pairs of screws or pins and signal contacts are connected with the screws or pins adjacent to the outer edges of the belts. The signal contacts are connected with a monitoring device which sends and receives signals to the contacts to provide an indication of the condition or deterioration of the belt.

A method for detecting deterioration of a plurality of wire ropes is provided. Each of the wire ropes extends over a conductive sheave in parallel. The wire ropes define a measurement length extending between one end of the wire ropes and contact points of the wire ropes with the conductive sheave. The method comprises measuring the resistance through a conductive path passing through the measurement lengths of two of the wire ropes and the conductive sheave and detecting the deterioration of the wire ropes from the measured resistance.

A method for detecting a deterioration state in an elevator suspension member including electrically conductive cords uses a multiplexing unit (MU) to apply first and second alternating voltages to proximal ends of first and second groups of the cords respectively and connect the proximal end of a third group of the cords to a voltage measurement arrangement connected to a reference potential. Distal ends of the groups are connected together. A first neutral point voltage between the third proximal end and the reference potential is determined. The MU is switched to apply the first alternating voltage to the second proximal end, apply the second alternating voltage to the third proximal end and determine a second neutral point voltage between the first proximal end and the reference potential. The deterioration state of the suspension member arrangement is determined based on the first and second neutral point voltages.

A method and device detect non-uniform and uniform deterioration states in an elevator suspension member having first and second groups of electrically conductive cords. First ends of the groups are electrically connected to an alternating voltage generator arrangement and second ends are electrically connected to each other through first and second resistors via a neutral point at which electrical resistances of the groups are the same in a non-deteriorated state of the suspension member. The method includes: applying first and second alternating voltages to the first end of the first and second groups, respectively; determining a neutral point voltage between the neutral point and an electrical reference potential; determining difference voltages between first and second difference measurement points located between the second ends of the groups and the respective resistors; and determining the deterioration state based on both the determined neutral point voltage and the determined difference voltage.

A method determines a status of at least one component of an elevator system, wherein the elevator system includes a suspension apparatus having at least one traction member. The at least one traction member is surrounded by a non-metallic cladding, wherein the suspension apparatus is guided via a drive sheave with a metallic traction surface. The method includes the steps of: identifying at least one parameter based on an electrostatic effect which occurs due to friction of the non-metallic cladding on the traction sheave with the metallic traction surface; and determining a status of the at least one component on the basis of the identified parameter.

An elevator has a safety controller to which several safety switch arrangements are connected. The safety controller is configured to cause the stop of the elevator motor and the activation of the motor brakes. A comparator is provided in the safety controller for the determination of the status of the safety chain. The comparator is connected with a memory for storing at least one resistor reference value, which comparator is configured to output a safety chain status signal in dependence of comparison of a measured resistance value with the resistor reference value. Each of said safety switch arrangements includes at least one first resistor and a safety switch which are connected in series. The value of the first resistor is different in at least some safety switch arrangements, preferably in all safety switch arrangements. Each safety switch arrangement includes at least a second resistor connected in parallel with the safety switch, which second resistor has a higher value than the first resistor. The detection of a short circuit as well as of the opening of a safety switch arrangement are allowed.

The invention relates to a rope terminal arrangement of an elevator, comprising compression means comprising two compression members delimiting a rope gap between them, the compression members being arranged to compress a rope end of a belt-shaped rope placed in the rope gap for blocking movement of the rope end in its longitudinal direction relative to the compression members; and an electrical circuit comprising a contact switch, which is switchable between a first and second state, in particular between open and closed state; and the contact switch being mounted on one of the rope end and a compression member, and the arrangement, in particular said other of said rope end and a compression member, is provided with actuating means arranged to move together with the other of said rope end and a compression member relative to said one of said rope end and a compression member and to actuate the contact switch to switch its state when the rope end moves in its longitudinal direction relative to the compression member, whereby movement of the rope end in its longitudinal direction relative to the compression member is arranged to cause state change of the electrical circuit; and a monitoring means arranged to monitor state of the circuit and to trigger one or more actions in response to state change of the circuit. The invention also relates to an elevator implementing said rope terminal arrangement.

A connector assembly includes a connector body and a suspension member. The suspension member extends along a center axis and comprises a plurality of tension members encased in a jacket. The suspension member has one end received within the connector body, and this one end has an end face extending at an angle relative to the center axis with ends of the plurality of tension members being exposed. A plurality of contact members are supported within the connector body, and each contact member contacts an exposed end face of at least one tension member to establish electrically conductive connections with the plurality of tension members.