Shuttle monitoring device, particularly for multiple-shuttle weaving machines

In a weaving machine, particularly a multiple-shuttle weaving machine, of the type in which the shuttle is provided with at least one shuttle magnet, and in which magnetic drive means moves along the shed and acts upon the shuttle magnet to effect positive magnetic transport of the shuttle through the shed, a shuttle monitoring device, the shuttle monitoring device comprising, in combination, a magnetic-field-dependent resistor for each shuttle to be monitored;

• means for transporting the magnetic-field-dependent resistor in parallel with and in synchronism with the drive means and in a region where the resistor is influenced by at least one pole of the shuttle magnet during the entire transport of the shuttle through the shed, whereby during transport of the shuttle through the shed the magnetic-field-dependent resistor will remain in a predetermined position relative to the at least one pole of the shuttle magnet so long as a predetermined relative position between the magnetic drive means and the at least one shuttle magnet is being maintained;
• and machine shutoff means connected to the resistor and operative for shutting off the drive means for the weaving machine in response to a resistance change of the resistor indicative of improper relative position between the drive means and the shuttle magnet and thus lack of proper shuttle movement.