820 



HOT-FLUE 



the actioii of the small pressor, and partly by the motion of the needles in descending. 

 A small iron slider is placed behind the rib-needles, which rises as they descend, and 

 serves to free the loops perfectly from each other. 



In the weaving of ribbed hosiery, the plain and ribbed courses are wrought alter- 

 nately. When the plain are finished, the rib-needles are raised between the others, 

 but no additional stuff is supplied. The rib-needles intersecting the plain ones, 

 merely lay hold of the last thread, and, by again bringing it through that which was 

 on the rib-needle before, givo it an additional looping, which reverses the line of 

 chaining, and raises the rib -above the plain intervals, which have only received a 

 single knitting. 



HOT BLAST. See IRON. 



HOT-FXiTTE is the name given in England to an apartment heated by stoves or 

 steam-pipes, in which padded and printed calicoes are dried hard. Fig. 1166 repre- 

 sents the simplest form of such a flue, heated by the vertical round iron stove c, from 

 whose top a wide square pipe proceeds upwards in a slightly-inclined direction, which 

 receives the current of air heated by the body and capital of the stove. In this wide 

 channel there are pulleys, with cords or bands which suspend by hooks and conduct 

 the web of calico from the entrance at B, where the operative sits, to near the point 

 A, and back again. This circuit may be repeated once or oftener till the goods are 

 perfectly dried. At D the driving-pulley connected with the main shaft is shown. 

 Near the feet of the operative is the candroy or reel, upon which the moist goods are 

 rolled in an endless web ; so that their circulation in the hot-air channel can be con- 

 tinued without interruption as long as may be necessary. 



Fig. 1167 is a cross-section of the 

 apparatus of the regular hot-flue, as it is 

 mounted in the most scientific calico- 

 works of England, those of James Thom- 

 son, Esq., of Primrose, near Clitheroe, 

 Lancashire, a a a a is an arched apart- 

 ment, nearly 30 yards long, by 13 feet 

 high, and 10 feet wide. Through about 

 one half of this gallery there is a hori- 

 zontal floor supported on arches, above 

 which is the driest space, through which 

 the goods are finally passed before they 

 escape from the hot-flue, after they have 

 been previously exposed to the hot but 

 somewhat moist air of the lower com- 

 partment. A large square flue covered 

 with cast-iron plates runs along the 

 whole bottom of the gallery. It is 

 divided into two long parallel vaults, 

 whose sections are seen &\,uu,fig. 1167, 

 covered with the cast-iron plates v v, 

 grooved at their ends into one another. The thickness of these plates is inm-ast-d 

 progressively as they come nearer to the fireplace or furnace. There are dampers 

 which regulate the draught, and of course the heat of the stove, h h are the air- 

 passages or vent-holes, left in the side walls, and which, by means of a long iron rod 



mounted with iron plates, 



1167 



1168 



per minute, and expel the moist air with perfect effect. 



of the windows, which extend throughout the length of the building, 



may be opened or closed 

 together to any degree. 

 k k are the cast-iron sup- 

 ports of the tinned IUMSS 

 rollers which guide the 

 goods along, and which 

 are fixed to the cross 

 pieces represented by rr, 

 fig. 1167. II are iron 

 bars for supporting the 

 ventilators or fan 

 FOUNDRY and VENTILA- 

 TION). These fans am 

 here enclosed within 

 a wire grating. Th'-y 

 make about 300 turns 

 8 indicates the position 



t is a 



