Method for transporting a weft thread through the weaving shed of a weaving machine through the intermediary of a flowing fluid, and weaving machine adapted for the application of this method

A weaving machine in which each weft thread is moved through a shed by means of a flowing fluid and in which the speed of the movement of each weft thread through the shed is correlated with the speed of operation of the weaving machine, comprising means for measuring the time occupied by movement of a weft thread through the shed, means for generating a first electrical signal which is a measure of such time, means for generating a second electrical signal which is a measure of a predetermined fraction of the time occupied by a weaving cycle of the machine, means for comparing said electrical signals and generating a third electrical signal which is a measure of the discrepancy between said first and second signals, and means responsive to said third signal for controlling one of said speeds to eliminate the discrepancy between said first and second signals.