CARDS. 



Roller* lor 

 feeding the 



Media, 

 nism for 

 measuring 

 and cutting 

 the wire. 



these notches. It is also passed through a wire eye 

 or ring c, to which a sufficient weight is .ipprndcc), 

 to rause such a friction an will kn-j> tin- wire steady. 

 The wire next passes through a guide, foinu-d liy a 

 hole in a piece of iron d t fixed by screws to a vertical 

 standard G, rising from the iron t'rame FF, on whii h 

 the whole mechanism is erected. By the guide d the 

 wire is presented to a pair of rollers or wheels D, by 

 which it is drawn forwards. These wheels are ex- 

 actly of the same size, and, being beneath each other, 

 only one can be seen in the figure. The lower roller, 

 which is hidden, is fixed upon an axis, which extends 

 across the frame, its ends being supported by the 

 joints' of the centre screws 20, 20. The axis is 

 turned round by means of a toothed wheel 7 upon 

 the main axis, and acting in another exactly similar 

 to it, fixed immediately beneath upon the axis of 

 the lower roller, which is perpendicular to the main 

 axis ; but the teeth of the wheels being both inclined 

 at an angle of 45 to their respective axes, become 

 parallel at the points of contact, and the wheels turn 

 each other round, by a similar action, to the endless 

 screw ; from which, however, this mode of commu- 

 nication differs most materially, in the circumstance 

 of the two wheels, or screws, (for they partake of the 

 nature of both) being of equal dimensions and simi- 

 lar forms. This communication causes the lower 

 roller to make a revolution for every one of the main 

 axis. At the opposite end of the axis of the lower 

 roller, a cog wheel is fixed, and operates upon an- 

 other E of exactly similar dimensions, and placed 

 over it, so as to conceal the former. This wheel is 

 fixed upon the axis (shewn by dotted lines) of the 

 upper roller D, which is mounted upon the points 

 of the centre screws, held in a frame marked II. 

 This frame is attached to a standard G of the frame 

 by two centre screws, so that it will rise on the 

 points of these as an axis, and thus permit the upper 

 roller to rise and fall, to accommodate itself to the 

 wire, and press it so-, fast upon the lower roller as to 

 draw it forwards. The pressure is occasioned by a 

 strong spring K fixed on the frame I, and its end 

 hooked beneath a projecting part ( not shewn ) of the 

 standard G. 



The rollers D deliver the wire into a steel tube, 

 ef t (see also Fig. 3, where it is shewn separately,) 

 the hole through which being but just large enough 

 to admit the wire, straightens it in the manner of dies, 

 and, together with the rollers, completely takes out 

 any crooks in the wire. The tube, (or pair of dies,) 

 ej, is made in two halves, which are held together 

 by the same clamp screw, which fastens them into the 

 bracket L that supports them. The end f of the steel 

 dies, which is enlarged, as shewn in Fig. 3, and has 

 a smooth flat face, is the point where the wire is cut 

 off, by means of a small knife g, fixed into an axis M, 

 on which is a lever 5, actuated at the proper interval 

 by the lever or claw 4, on the main axis A, into 

 which* it is screwed ; and can therefore be readily ad- 

 justed in length, to operate more or less upon the 

 lever 5, by which it cuts off the wire at the point, 

 where it emerges from the endy of the dies ef. The 

 length of wire which is advanced through the dies, 

 before it is cut off, is measured by the end of the 

 wire coming up to the flat head of a screw 10, sup- 



ported by a bracket L ; but the instant the wire Cirdr 



;-s this, the upper roller D is lifted up, so as to ^"V"*' 

 n-lirve the pressure upon the wire. This it done by a CXI 

 cam 1, which has a part of the frame I projecting 

 over it, and at the end of it is a tooth or knob, fattened 

 by the square nut. This tooth is lifted by the cam 1, 

 which is a circle, having a deep notch cut in it, and 

 thus relieves the wire when the circular part of the 

 cam comes beneath it ; and though the motion of the 

 rollers continue, the wire remains stationary, but in 

 turning the notch presents itself beneath the tooth of 



I. The spring k now presses the upper roller upon 

 the wire, which is then pushed forwards until the 

 proper measure is advanced, when the upper roller 

 will be again lifted up by the cam, as before men- 

 tioned. This movement is, therefore, devoted to mea- 

 suring the wire ; the rollers and dies cfto straighten- 

 ing it ; and the shears, or cutter g, to cutting it off 

 into the lengths measured by the other. We have 

 now to explain the mechanism for doubling and bend- 

 ing. These parts are in the drawing shewn of their 

 real size, to render them distinct, though all the 

 other parts are only one half the full size. The wire, 

 when advanced by the rollers, is introduced between 



two pieces of metal q I, r s. These are shewn in Plien for 

 all the figures. In Figs. 2 and 3, they are only re- holding the 

 presented by small squares ; but Figs. 4 and 5, shew w 

 them to be the ends of levers q and r, moveable on F'g- < 5. 

 one common axis, but independent of each other. 

 They are called the back and front blades of the pliers ; 

 their axis of motion is parallel to the main axis A j 

 and is suspended between the points of centre 

 screws, supported by the standards GG. This forms 

 the axis of the lever r, as shewn in Fig. 4, which 

 only represents the moving parts. The axis of the 

 lever q, marked 15, 15, swings between the points of 

 centre screws attached to a part of the lever >, but' 

 exactly in a line with the two fixed centre screws on 

 which r r itself moves. Thus both blades of the pliers 

 move on the same central line, but independently ; 

 they have therefore a motion directly to and from 

 the main axis, but no other. The two levers q and ;, 

 have a small spring 19 (Figs. 4 and 5,) between them, 

 which always tends to separate them and open the 

 pliers. The axis 15 of q has a short tail or lever 18 

 rising from it, which stops against the point of an ad- 

 justing screw 16', (Fig. 5,) and determines the quantity* 

 of approach which the end of the blade q (Figs. 2, 

 3, and 5,) shall make towards the main axis; 17 is 

 a spring of a semicircular form, always drawing the 

 tail 18 towards the screw 16 ; and consequently ur- 

 ging the blade q towards the main axis ; the spring 19. 

 also urges the front blade trs, (Figs. 2, 3, and 5,) 

 towards the axis, till the arm II screwed to it, rests 

 upon the outside of the axis. A cam 9 is fixed on the 

 axis at this part ; and when it comes round, acts upon 



II, and by it forces the blade irs away from the 

 main axis, till t comes in contact with the wire a a, 

 ( Figs. 2 and 4, and shewn in Fig. 5 by a small black 

 dot surrounded by a white circle,) and presses it 

 against the blade g ; thus holding it in the manner of 

 a pair of pliers, or a finger and thumb, while the' 

 shears cut it off. All this time the blade g may be 

 considered as stationary ; the spring 17, (Fig. 5,) 

 which opposes its retreat from the main axis, being 



