Compound needle

Features of compound needle:

Compound Needle consists of two separately controlled parts; these are- the open hook and the sliding closing element (tongue, latch, piston, and plunger). The two parts rise and fall as a single unit but at the top of the rise, the hook moves faster to open the hooks and at the start of the fall the hook descends faster to close the hook. It is easier to drive the hooks and tongues collectively form two separate bars as in warp knitting; than to move each hook and tongue individually as in weft knitting.