352

COTTON MANUFACTURE.

delivery of the cotton irregular. The feed rollers make 8 turns in the minute; and astheir diameter is I 5 inches, they will introduce 8 times their circumference, or 37*7 inchesOf the cotton spread upon the apron in that lime. Upon every 12th part of an inch ofthe cottoh, therefore, nearly 3 blows of the scutcher arm will be applied. The secondfeed rollers move relatively with more slowness, so fhat for every 2'4 blows of thescutcher, only one twelfth of an inch of cotton wool is presented.

The fan is enclosed in a cylindrical case. The wings or vanes revolve from 120 to150 times in the minute; and while they throw the air out with nearly this velocityat their eccentric outlet in the circumference, they cause it to enter, with equal ve-locity, at the centre. With this centre the squirrel cage is connected by a pipe, as above

stated. The sound filaments ofthe cotton are arrested by thesieve surface of the cylindric cage,and nothing but the broken frag-ments and the light dust can passthrough.

The cotton wool in the blowingmachine is wafted by the secondscutcher into the space x, w, w.provided with a fine grid bottom;or it is sometimes wound up thereby rollers into a lap.

In fig. 318 an additional venti-lator is introduced beneath at m,0 , 0 , to aid the action of thescutchers in blowing the cottononwards into the oblong trougha. The outlet of that fan is att; and it draws in the air at itsaxis q. u and v are two doorsOr lids for removing the cleanedcotton wool. This last fan issuppressed in many blowing ma-chines, as the scutching armssupply a sufficient stream of aitThe dotted lines show how themotion is transmitted from thefirst mover at s, to the variousparts of the machine. 6 ' 6 ' rep-resent the bands leading to themain shafting of the mill- ■*machine of this kind can cleanfully 600 pounds of short-stapledcotton wool in a day, with thesuperintendence of one operative,usually a young woman, to dis-tribute the cotton upon the firsfeed cloth.

The second Blowing machmis usually called a lap machine,because, after blowing and scuteing the cotton, as above descrio >it eventually coils the fleece U Pa wooden roller at the delive _end of the apparatus. »times, also, called a spp j smachine. A section ot ,.

shown in/g. 319. The bread^

of this machine is about 3 1 , ’|- orthe lap formed is preparethe usual breadth of the t j, ecards, namely, 3 feet. Wcards are only 18 inch , 0 fthe lap machine is also t j iewe see the feed-cloth, the scutching o a ’

Q)o o

the same breadth. In the figure

me o * - v. occ IIIC |CCU-C1UH«,

squirrel suction, and spreading cage, and the rollers for coiling up the p

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