United Technologies Corporation

Carrier Corporation

Otis Elevator Company

Otis Elevator

Charles Whynacht

Robert E Hall

Charles S Wilson

Frederick C Chamberlin

Peter D Carter

A Remote Subsystem for monitoring a large number of parameters relating to operating equipment at a remote site is disclosed. A monitoring system having a plurality of local service offices each reporting to a central office and each having a plurality of remote subsystems at remote sites reporting to it is also disclosed. Each remote subsystem reports only a first alarm condition detected for a particular unit of equipment to its local office and reports the unit back in a normal operating condition only after all detected alarm conditions have returned to a non alarm status. In this way, the local and central offices are not inundated with information of little value. Each remote subsystem also monitors conditions that are indicative of impending alarm conditions in order to alert local and central service offices of developing problems in the field. Similarly, each remote system monitors and accumulates miscellaneous data useful for a variety of monitoring purposes. Periodic reports are generated from each remote subsystem to the local ofices and on to the central office.

Remote subsystem

A method and apparatus for reducing unnecessary elevator service calls by cycling open and shut a nonresponsive car's door, is disclosed. The doors are cycled in the presence of car demand and indications the car door is shut but the hoistway door is ajar. The doors are cycled only after these conditions persist for a selected period.

Method and apparatus for reducing elevator service calls

A plurality of different types of operating systems in buildings organized in geographical groups, each group having a local service office, are monitored at both the local offices and central office for the presence of performance conditions and conditions indicative of an alarm condition.

Remote monitoring system state machine and method

A plurality of operating systems in buildings organized in geographical groups, each group having a local service office, are monitored at both the local offices and a central office for the presence of various combinations of performance criteria defining alarm conditions.

Growing community of inventors

Glastonbury, CT, United States of America

Charles Whynacht