Patent ID: 6998995

Claim:
A remote monitor for elevator comprising: an auxiliary power which supplies operating power instead of a main power when the main power fails; an interphone battery for an interphone, provided in an elevator carriage; a transmitting unit which monitors the running state of the elevator and transmits the running state to a monitoring center of an elevator maintenance agency via a public telephone line network; a communication unit which allows communication between said interphone and said monitoring center by switching ON an emergency call button, provided in said elevator carriage; a first switching unit which cuts off said auxiliary power when there has been no irregularity in the monitoring information of the elevator after the operating power has been supplied for a fixed period of time from said auxiliary power instead of said main power when said main power fails; and a second switching unit which is driven by power from said interphone battery, and re-injects said auxiliary power when said emergency call button has been pressed.