US PATENT SUBCLASS 198 / 323
.~.~ By means responsive to an unsafe operating characteristic of the system

Current as of: June, 1999
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198 /   HD   CONVEYORS: POWER-DRIVEN

321  DF  CONVEYOR OR ACCESSORY THEREFOR SPECIALIZED TO CONVEY PEOPLE {5}
322  DF  .~ With means to control the operation of the section {1}
323.~.~ By means responsive to an unsafe operating characteristic of the system

DEFINITION

Classification: 198/323

(under subclass 322) Device wherein a means to sense the operation of the section is provided which originates an operation command to vary the speed of or to stop the section if some condition is sensed which is dangerous or potentially dangerous to either the conveying mechanism or to the passengers moved by the mechanism.