Patent · US Active

Elevator alarm systems

US11472668B2 · kind B2 · utility

1Cited by

3References

20Claims

0Family size

Assignee

OTIS ELEVATOR COMPANY · US

Inventors

Gerard Sirigu · Amilly, FR
Guillaume Trouvain · Amilly, FR

Key dates

Filing date	Nov 5, 2019
Grant date	Oct 18, 2022
Priority date	—
Expiry date	Jan 29, 2041

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E60/10
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Electrical systems of elevators and methods thereof, with an elevator alarm system configured to provide an alarm within an elevator car of the elevator system, wherein the elevator alarm system is configured to be supplied with power from a primary power source. A secondary power source includes a first storage device and a second storage device and a controller is configured to control a power flow from the secondary power source to the elevator alarm system when the primary power source fails and test a capacity of the first storage device by discharging a power of the first storage device and storing said discharged power within the second storage device.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.