G PHYSICS
G01 MEASURING; TESTING
G01D MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
5/00 Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
G01D5/12 using electric or magnetic means
G01D5/244 influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
G01D5/245 using a variable number of pulses in a train
G01D5/2451 Incremental encoders