Escalator combplate stop switch load calibrating assembly

摘要

An escalator combplate is equipped with a stop switch that will interrupt the power to the escalator when objects trapped between the stop treads and combplate impose a predetermined lifting force on the combplate. The necessary lifting force is determined by code requirements, and the combplate is subjected to an upward spring force which equals the code-dictated lifting force. While the combplate is being lifted by the spring force, the stop switch or switches are set so that they will actuate at the calibrated position of the combplate. The spring force is then removed to allow the combplate to settle back to its normal operating position.