摘要:
This invention provides a control apparatus for use with a dyeing and/or finishing machine of the kind in which a skein or rope of material is passed through a closed circuit including tubular conduits. A magnet or metal element moves with the skein or rope and in one zone of the closed circuit an electromagnetic detector is arranged to provide pulses in response to the passage of the said element through the zone. If the pulses fail to appear within a given interval of the time taken for one complete circuit of the dyeing machine in normal operation of the latter the detecting circuit operates an alarm device signalling stoppage of the skein or rope in the machine.