124 THE ELECTRIC TELEGRAPH. 



horizontal stage s. The jockey- roller R X turning freely 

 within the frame F, and pressed down by the spring Y, holds 

 the paper strip tight upon the roller R, so that, as the latter 

 turns round, a progressive motion is imparted to it. The 

 jockey R x can be lifted up from the paper by turning the 

 lever H to the left. The force with which it presses upon 

 the paper on the roller R is regulated by means of the 

 adjusting screw s, against which the end of the spring Y 

 abuts. T is the feeding roller of felt, kept moist with fresh 

 oil-colour, and turning freely on its axis in a frame sup- 

 ported on a regulating-screw on the axis B. The purpose 

 of the screw is to move the roller in or out a little to pre- 

 vent its surface always riding over the disc in the same 

 line. 



The axis B consists of a pin fixed in the side of the appa- 

 ratus, from which the frame containing T can be easily 

 removed. T rests, when at work, a little obliquely, by its 

 own weight only, on the top of the printing disc, with which 

 it revolves. 



M is the electro-magnet, A its armature, supported by the 

 beam L L, turning on its axis I, and is held in its position 

 of rest by the spring /, stretched between a right-angled 

 arm, /, of the beam and the adjusting screw, S L . 



When the armature is attracted to the poles of the electro- 

 magnet, the knife-edge, forming the end of the continuation 

 K K of the beam, is raised, and lifts the paper against the 

 disc D, which revolves in a reverse direction to that of R 

 and to the passage of the paper, against which it rubs so 

 long as the armature is kept down. On the cessation of the 

 current the spring pulls back the beam, and the paper-strip 

 falls off the disc. 



This instrument is worked without relay and local battery, 

 and has become a great favourite with the employes; the 

 deciphering of inked letters being infinitely less fatiguing 

 than that of embossed. The renewal of ink, when the ap- 

 paratus is in full work, is not required more than once a day 



Thus the principal difficulties in the way of the Morse 

 apparatus are removed. The Digney instrument has been 



