| 摘要 |
The apparatus with a change gear regulates the density of weft yarn in weaving fabrics. The apparatus comprises various cards with perforation, which are changed by designs, for changing the change gear; gear mechanism including standard gear (71) with concentrically rotating middle gear (75), which is meshed with following gear (77) being meshed with change gears (80)(81)(82); power transmitting mechanism including driving gear (20) on bttom shaft (19), which is meshed with following gear (21) on the shaft rod (14) of cam (15) being connected with end of moving bar (16).
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