596 



CALICO-PRINTING 



attached by an arm o to a cross-bar p, and is capable of being turned upon its centre 

 so as to occupy any angle in reference to the tracer rod d, being confined in any 

 desired position by a tightening screw q, and thereby constituting an inclined plane for 

 the stud m to act against ; the cross-bar p rests upon flanged rollers r, which roll 

 upon a fixed bar s, provided with a groove for the purpose of allowing the arm o to 

 travel along its length. To the bar pare affixed the carriages u of the tools. The 

 upper part of the bar e (through which the tracer rod passes) carries a stud 6 situate 

 within a groove formed in a lever 6, which lover, like that shown at n, is capable of 

 being turned upon its centre to any angle, so as to constitute an inclined plane for the 

 stud 6 to act against, and of being confined to any desired position by means of 

 tightening screws 7. The boss of the lever 6 carries an arm 8, which extends upward, 

 and is there connected with a cross-bar 9, to which are attached parallel bars 10, 

 running upon flanged rollers 11, situate upon fixed bars 12, upon which the cylinder 



838 



A bears so as to communicate rotatory motion thereto. The operation of the machine 

 is as follows : The tracer being pushed inward or drawn outward, will cause the 

 parallel bars h to move in a similar direction, thus carrying the bar g and stud m 

 along the inclined groove in the lever n, by which means the bar p will be caused to 

 move transversely, carrying with it the tools along the surface to be operated upon, 

 and thus the operation in one direction is accomplished. A crosswise movement of 

 the tracer will cause the rod d to move the bars e g transversely, and the stud 5 will 

 be forced against the inclined plane within the lever 6, so as to effect a longitudinal 

 motion of the bars 10, whereby the ribs 13 will act against a part upon the axis of 

 the cylinder A, so as to cause it to revolve, and thus the motion in the other direction 

 is obtained. By subsequent improvements the pentagraph system has been greatly 

 extended in its application to many styles of engraving hitherto unapproachable. 

 Conspicuous amongst them may be noted the employment of the punch and a vibratory 

 motion imparted to the roller, by means of which circumferential lines are engraved 

 on the roller which have equal working qualities with those obtained by the mill. 

 With regard to the 2- and 3-coloured machines, we. must observe, that as the calico 



