Elevator – industrial lift truck – or stationary lift for vehicle – With monitoring – signalling – and indicating means – Monitors operational parameter
Reexamination Certificate
2000-05-09
2001-12-18
Salata, Jonathan (Department: 2837)
Elevator, industrial lift truck, or stationary lift for vehicle
With monitoring, signalling, and indicating means
Monitors operational parameter
C187S247000
Reexamination Certificate
active
06330936
ABSTRACT:
TECHNICAL FIELD
This invention relates to monitoring elevator operation, and providing informative indications of notable features and related attributes separated in terms of related occurrences.
BACKGROUND ART
The monitoring of elevator operation for maintenance and repair purposes has long been known. Typically, counters may record the number of runs, the number of times a door opens or closes, loss of safeties, and the like. In some cases, the data is reduced by statistical means, such as providing the mean time to open a door or other event, coupled with a normal variance thereof. Frequently, this approach will mask data that is significant in maintaining and servicing elevators; the data is difficult to understand and apply to elevator servicing; and it has been found to be of little value in resolving elevator problems during repair. The use of present-day elevator monitoring systems has been shown to result in many unnecessary service calls, and when the service personnel arrives at the elevator, the information does not significantly help in pointing to the problem. All of these problems are further compounded when the elevator is operating normally at the time that the service personnel arrives.
DISCLOSURE OF INVENTION
Objects of the invention include provision of improved analysis of elevator operating data to trigger service calls; providing elevator operation messages that more closely relate to real elevator problems; minimizing data storage requirements in elevator monitoring; providing elevator maintenance information which is simple to understand and can be managed easily by service personnel; providing elevator information which can be managed easily by service personnel without the help of an analysis tool, such as a microcomputer; providing improvements in information which may be used for routine maintenance as well as for servicing failures.
According to the present invention, parameters of an elevator, including conditions and events, are monitored, and when such parameters are notable, as having significance in maintenance or repair, a feature is recorded in a chronological log together with related attributes. Examples of related attributes are date and time, duration of the event or of a related factor, the floor number where the elevator was when the feature occurred, and direction of car movement. All of the recorded features which relate to each other are separated from unrelated recorded features of a similar or other type by means of separation markers which include time and date stamps, the duration of related features, and a floor number. Examples of features which are recorded are door reversals, loss of safeties, either while at a landing or while in flight, doors not locking, doors opening in flight, door rebound, and doors being open too long.
Other objects, features and advantages of the present invention will become more apparent in the light of the following detailed description of exemplary embodiments thereof, as illustrated in the accompanying drawing.
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Barreiro Juan A. Lence
Freeland Gary L.
Huang Harry Z.
Mashiak Robert H.
Moon Chouhwan
Otis Elevator Company
Salata Jonathan
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