165 (#227) ############################################ SETS OF WOOLLEN MACHINES 1 This plant may be calculated on the basis of 40 lb. per hour per card, and the mule spindles given are based upon spinning 40 skeins Yorkshire woollen yarns. In Fig. 53 a ground-floor plan of an up-to-date woollen mill is given. In this case a heavier feed of the cards is possible, as a thicker count of yarn (10 skeins to 20 skeins) is to be spun. In the case of mungo, shoddy, etc., each set of cards should be designed with sufficient carding surface to card up thoroughly blends in which the waste structure has not been thoroughly disen- tangled, or, should extreme mixtures be required, to effect perfect mixing of either colours or different materials. The particulars already given for the previous plan should be made the basis of study for this plan also. It will be noticed how much better this plan lends itself to the satisfactory arrangement and extension of the machinery and also to the firm, rigid fixing which is so necessary in the case of cards. The control of lighting and driving is also so much better that, wherever possible, it is obvious that this scheme should be adopted. In order to give some idea of woollen-mill design Figs. 53a, 53b, and 53c are given. It is impossible here to go into such matters as (a) Selection of site and preparation of the ground for building; (6) Types of building materials; (c) Types of floor ; (d) Types of roof and roof-spans ; (e) Types of drive ; () Control of lighting and cleaning (floors, walls and windows); (g) Power and water supply and drainage ; 167
25 26 Textile Machine Part