211 (#283) ############################################ WORSTED DRAWING MACHINES This may be checked by- Front-roller speed 0677 Back-roller speed = 3:55 total draft. 0191 Such points as the method of measuring the diameter of the porcupine (and even of the direction of point and running of the porcupine) and the tensions necessary to give the best results should be very carefully con- sidered. In the French roving-box there is a balling-head specially designed to lay the meshes closely side by side from start to finish of each ball (Fig. 66a). The satis- faction and inspiration of efficient work which is thus en- sured is by no means to be ignored, although it is natural for the ordinary overlooker to wish for a mechanism which he can start up without any difficult calculation or the exercising of his possibly lethargic judgment. The following particulars respecting French drawing- boxes may be especially useful in view of the increasing importance of French drawing. Porcupines for French drawing-boxes : Complete Particulars for French drawing machines. PORCUPINES FOR FRENCH DRAWING-BOXES No. of rows of pins. Pins in one row. Birmingham wire gauge. = Set over in mms. (width). = Diameter of shaft. F = Diameter at base of porcupine in mms. G Diameter of fange of porcupine in mms. A B C D E Operation A B C D E F G ist Drawing Box 2nd 3rd 36 47 84 Iña Ito ITE 60 60 бо 4th 20 22 23 25 26 27 44 48 50 40 36 42 44 47 54 240 80 80 70 70 70 IP 52 62 72 5th 6th 17 IM 48 48 48 A 38 The above particulars are for Messrs. Platt Bros.' machines. 2II
67 67 Textile Machine Part
32 32 Textile Machine
11 11 Textile Machine Part
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168 168 Textile Machine
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208 208 Textile Machine
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225 226 Textile Machine