JACQUARD-LOOH 



D is a square wooden axis, moveable upon itself round two iron pivots, fixed into its 

 two ends ; which axis occupies the bottom of the moveable frame B. The four faces of 

 this square axis are pierced with three round, equal, truly-bored holes arranged in 

 u quincunx. The teeth a, fig. 1291, are stuck into each face, and correspond to 

 holes a, fig. 1294, made in the cards which constitute the endless chain for the healds; 

 BO that in the successive application of the cards to each face of the square axis, the 

 holes pierced in one card may always fall opposite to those pierced.in the other. 



The right-hand end of the square axis, of which a section is shown in double size, 

 fig. 1290, carries two square plates of sheet iron d, kept parallel to each other and 

 a little apart, by four spindles e, passed opposite to the corners. This is a kind of 

 lantern, in whose spindles the hooks of the lever//', turning round fixed points # g' 

 beyond the right-hand upright A, catch hold, either above or below at the pleasure of 

 the weaver, according as he merely pulls or lets go the cord z, during the vibratory 

 movement of the frame B. 



E is a piece of wood shaped like a T, the stem of which, prolonged upwards, passes 

 freely through the cross-bar b, and through the upper cross-bar of the frame B, which 

 serve as guides to it. The head of the T-piece being applied successively against 

 the two spindles e, placed above in horizontal position, first by its weight, and then 

 by the spiral spring h, acting from above downwards, keeps the square axis in its 

 position, while it permits it to turn upon itself in the two directions. The name press 

 is given to the assemblage of all the pieces which compose the moveable frame B B. 



1290 



1291 







F is a cross-bar made to move in a vertical direction by means of the lever o, in the 

 notches or grooves i, formed within the fixed uprights A. 



H is a piece of bent iron, fixed by one of its ends with a nut and screw, upon the 

 cross-bar F, out of the vertical plane of the piece c. Its other end carries a friction 

 roller j, which, working in the curvilinear space c of the piece c, forces this, and 

 consequently the frame B, to recede from the perpendicular, or to return to it ac- 

 cording as the cross-bar F is in the top or bottom of its course, as shown in figs. 1288 

 and 1289. 



i, cheeks of sheet iron attached on either side to the cross-bar F, which serve as a 

 safe to a kind of claw K, composed here of eight small metallic bars, seen in section, 

 figs. 1288 and 1289, and on a greater scale \nfig. 1291. 



j, upright skewers of iron wire, whose tops bent down hookwise naturally place 

 themselves over the little bars K. The bottom of these spindles likewise hooked in 

 the same direction as the upper ones, embraces small wooden bars I, whose office is 

 to keep them in their respective places, and to prevent them from twirling round, 

 so that the uppermost hooks may be always directed towards the small metallic bars 

 upon which they impend. To these hooks from below are attached strings, which 

 after having crossed a fixed board m n, pierced with corresponding holes for this purpose, 

 proceed next to be attached to the threads of the loops destined to lift the warp threads. 

 K K, horizontal spindles or needles, arranged here in eight several rows, so that each 

 spindle corresponds both horizontally and vertically to each of the holes pierced in the 

 four faces of the square axis D. There are, therefore, as many of these spindles as there 

 are holes in one of the faces of the square. 



Fig. 1292 represents one of these horizontal spindles, n is an eyelet through which 

 the corresponding vertical skewer passes, o, another elongated eyelet, through which 

 a small fixed spindle passes to serve as a guide, but which does not hinder it from 



1292 



o 



moving lengthwise, within the limits of the length of the eyelet, p, small spiral 

 springs placed in each hole of the case q q, fig. 1291. They serve the purpose of 

 bringing back to its primitive position every corresponding needle as soon as it ceases 

 to press upon it. 



