DEVICE FOR CONTROL CLOTH DENSITY IN WEFT AND METERING TRANSDUCER OF LENGTH OF SECTOR PASSED BY CLOTH WHILE IN OPERATION OF WEAVING MACHINE Russian patent published in 2013 - IPC D03J1/20 

FIELD: textiles, paper.

SUBSTANCE: device for control the cloth density in weft comprises a housing, a position sensor of the reed, a metering transducer of the length of the sector passed by the cloth, a signal amplifier from the position sensor of the reed, a pulse shaper, an AND circuit, a counter, a timer, a computing device and a display. And in the device the signal amplifier of the metering transducer of the length of the sector passed by the cloth is additionally inserted, as well as the counter of sectors and logic elements mounted at the output of the metering transducer of the length and connected to the computing device. The inputs of the signal amplifier are connected to the outputs of the metering transducer of the length connected to the counter of sectors, and the output s of the amplifier through the NAND logic elements and the counter of sectors are connected to the computing device having an interface with the electronic computer and connected to the electronic control system with the actuating units. The metering transducer of the length of the sector passed by the cloth while in operation of the weaving machine comprises a cylindrical element in contact with the cloth. It is mounted with the ability to rotate and is connected through the check mark with a computing device. The cylindrical element is in the form of a drum, inside of which the disc is coaxially mounted which is metallised on one end surface. On this surface the trapezoidal sectors are made, which large bases are located on the perimetre of the disc, and the length of the smaller base of the trapezoidal sector is made directly-proportional to the number of sectors, corresponding to the control length of the cloth sample. On smaller bases of the trapezoidal sectors on the disc a concentric groove is made insulating the inner part of the disc along the circumference, which operates as a common contact. And the sectors are isolated from each other and are the terminal areas. On a bracket fixed on the inner end surface of the drum, at the line of the groove a contact is placed, mounted with the ability of rotation about its axis.

EFFECT: group of inventions enables to improve the accuracy of measurement of cloth density in weft while in operation of the weaving machine with simultaneous enhancement of the device functional capabilities.

2 cl, 1 tbl, 7 dwg