Objective of drop box motion l Structure and working of Eccle's drop box motion

Eccle'smultiple box motion:
The main objective of multiple box motion is to change the colour of the weft yarn as per the fabric weft pattern. It is mounted at one side of the loom. If a fabric has more than one colour or counts in the weft yarn, the multiple box motion gets compulsory in the loom.
The eccle's dropbox motion is a positive multiple box motion. A pattern cylinder is used to select the shuttle box. 4 shuttle boxes are used in this type of dropbox motion at one side of the machine.
A disc A is used in this mechanism. A pinion B is also fastened on the disc shaft. A toothed rack C is connected to the teeth of pinion B. The bottom part of the toothed rack is fulcrummed at point M. An eccentric disc L is mounted on the bottom shaft of the loom. The one end of rod N comes down and gets connected to the one end of lever O. The lever O is fulcrummed at point P. The other end of the lever is connected to the shuttle box lever. Rack C makes up and down movement when eccentric L rotates. The card cylinder G rotates by tappet K. A pattern chan is mounted over the card cylinder. The tappet K is mounted on the bottom shaft of the loom. Stopper( catch) is used to prevent unnecessary movement of disc A . Needle F rests in front of the card cylinder. Four shuttle boxes are mounted on the top of the shuttle box shaft.
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