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preparation of warp yarns. Efforts in that field have been


crowned with marked success to the benefit of the entire


industry.


Much less has been done for filling yarns.


Perhaps this was because the magazine made such a


radical change in the handling of filling in the loom that


there appeared to be nothing further in that direction to be


attained. But as the 12 and 16 loom weaver has given


place to the 20, 24 and 32 loom weaver, and more recently


on some kinds of goods to the 36 and even 48 loom


weaver; as battery hands have been more generally


employed; as the increased use of the feeler mechanisms


for matching the pick and demand for cloth more nearly


perfect have become the vogue in the trade; as longer


bobbins and more yarn on the bobbins have shown that


the capacity of the loom battery was none too large to keep


up with the advancing procession of improved methods,


the quality and quantity of filling on the bobbin have


become of the utmost importance and called for


improvements in the preparation of filling yarns.


The brass- bushed bobbin, designed to aid in meeting


these demands, is one of the most important improvements


in the filling yarn field.


A STORY ABOUT NORTHROP LOOM BOBBINS


Bobbins, being made of wood, have always been


subject to external and internal variations in size due to the


effect of atmospheric conditions. Heat, water, steam and


humidity, all of which have their necessary part to play in


the process of spinning, conditioning and weaving, act


directly upon the bobbins to change the outside and


contract the opening where the bobbin fits upon the spindle


whorl.


Interior variations in the bobbin cause a variety of


troubles in the spinning room, the effects of most of which


appear in the weave room to handicap and reduce


production; exterior variations in the butt of an automatic


loom bobbin cause loom troubles that reduce output and


increase seconds.


BOBBINS CHANGE AND TROUBLE BEGINS


Each of two or three rings on the butt of an automatic


loom bobbin, if properly made and tempered, exerts a


constant pressure of 70 pounds. This outside pressure


holds the butt so firmly that changes in the bobbin due to


humidity result in the closing in of the hole in the base of


the bobbin.


Bobbins with spindle holes of varying sizes will set at


different heights on the spindles on the frame. The rail


must be started for the bobbins that set highest on the


spindles or the yarn will be wound upon the butts of the


high bobbins, a frequent cause of a smash in the loom. If


started for the high bobbins, all the bobbins have less yarn


on them than if fIlled to the full length of the traverse,


which means increased expense in doffing and more work


in fIlling the loom batteries.


To prevent these troubles, bad bobbins are constantly


being thrown out and reamed. To watch for and pick out


these bobbins is one cause of expense. The reaming is


another.


The reaming takes off any protecting coat on the


bobbins as originally made and opens up the pores of the


wood for direct and speedy action by water and steam.


Thus reamed bobbins, put into use again, last a shorter


time than new ones; and the time to each succeeding


reaming is ever shorter and shorter.

Cotton Chats 1923, No. 241, Page 4-5