Equipment including improved safety switch

The invention discloses equipment includes a cable pull switch. The cable pull switch includes a polychotomous cable pull sensor configured to provide a reading comprising of at least one of a plurality of values, the reading corresponding to a tension on a pull cable or a linear displacement of a first end of a pull cable, at least one processor coupled to the polychotomous cable pull sensor. The processor is configured to determine a rate of change (ROC) of the plurality of values and determine whether the plurality of values exceeds an upper pull threshold value, periodically adjust the upper pull threshold value at a fixed interval of time. if the ROC of the plurality of values is below an ROC threshold, periodically adjust a lower slack threshold value at the fixed interval of time if the ROC of the plurality of values is below an ROC threshold, and determine an occurrence of a cable pull event based on the determined ROC of the plurality of values, or whether the plurality of values exceeds the upper pu