Abstract: The invention relates to a piezoelectric force sensor (1) comprising a housing (10) having at least one piezoelectric body (11) and an electrode (12) electrically connected to said body (11), wherein a connection device (13) for forwarding measurement signals having a contact pin (131) is fastened or molded on the housing (10). The contact pin (131) is connected to the electrode (12) in an electrically conductive manner. According to the invention, a helical compression spring (14) is electrically conductively connected to the contact pin (131) as an electrical connection within the piezoelectric force sensor (1).

Abstract: The invention relates to a piezoelectric force sensor (1) comprising a housing (10) having at least one piezoelectric body (11) and an electrode (12) electrically connected to said body (11), wherein a connection device (13) for forwarding measurement signals having a contact pin (131) is fastened or molded on the housing (10). The contact pin (131) is connected to the electrode (12) in an electrically conductive manner. According to the invention, a helical compression spring (14) is electrically conductively connected to the contact pin (131) as an electrical connection within the piezoelectric force sensor (1).

Abstract: A method and an apparatus provides for the use of a sensor to detect a state which requires the removal of a weft thread inserted by a weaving rotor of a series shed weaving machine used for the formation of shed to make a cloth. Upon detection of the state, the weaving rotor is stopped before the inserted weft thread to be removed is beaten up against the cloth edge of the cloth. A weft thread removal apparatus is provided for removing the weft thread after the weaving rotor is stopped.

Abstract: Weft yarn faults encountered during the operation of rapier looms are corrected by correlating the detection of the fault to the angular position of the rotating main shaft of the loom. The loom has a shed with a giver side and a taker side, a giver rapier at the giver side and a taker rapier at the taker side. Position signals are stored in an electronic storage device for weft yarn faults which can occur at predetermined angular positions of the main shaft during operation of the loom. The weft yarn is monitored and a signal is generated when a faulty weft yarn is detected. This signal is compared with the position signals in a logic circuit to thereby determine the nature of the fault. After the nature of the fault has been determined, the faulty weft yarn is appropriately removed and, thereafter, weaving continues.