Otis Elevator Company

Frank Kirchhoff

Peter L Herkel

Dirk Heinrich Tegtmeier

Bernward Engelke

Ralph S Stripling

Michael Wilke

Andreas Vogt

Ingo Engelhard

Burkhard Braasch

Martin Georg Walter Hnida

Frank Wiegand

Hermann Ludwig Lorenz

An elevator brake control system () is described, in particular for controlling an elevator brake in a machine room-less elevator, the elevator including a drive machine drivingly coupled to an elevator car for moving the elevator car between a plurality of landings in a hoistway, and an elevator brake having at least an engaged condition for holding the elevator car at a fixed position in the hoistway, and a released condition for allowing the elevator car to move along the hoistway; the elevator brake control system () comprising a first safety device (T) and a second safety device (T), each of the first safety device (T) and the second safety device (T) responsive to detection of a failure in any sub-system of the elevator, such as to bring the elevator brake into its engaged condition in response to detection of such failure; wherein each of the first safety device (T) and the second safety device (T) comprises a power semiconductor switching device.

Elevator brake control system

A device and method for detecting a misaligned or missing step of a conveyor are disclosed. The missing step detector includes various sensors for detecting the drive speed of the conveyor and for detecting the presence of pallets or steps. The sensor output signals are correlated to determine fixed values characteristic of the specific conveyor in question. Using the fixed values as reference, the missing step detector is able to effectively monitor the conveyor for misaligned or missing steps independent of conveyor speed and time.

Signal correlation for missing step detection in conveyors

People conveyor () having an endless people transportation band () and an endless handrail (), a glass balustrade () arranged laterally to the transportation band () and supporting the handrail (), and a profile () having an U-shaped channel () for engaging the glass balustrade () and comprising an illumination cavity (), wherein a plurality of LEDs is arranged in the illumination cavity ().

People conveyor glass balustrade lighting

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Berlin, Germany

Frank Kirchhoff