114 



TRANSACTIONS OF THE 



are regulated by thumb-screw, p. The machine is held on the table by four small 

 pins, b, fitting into corresponding holes made in small pieces of India rubber fixed 



to the table, so as 

 to remove all sound, 

 and render the ma- 

 chine " noiseless." 

 C shows the belt on 

 the pulley, by which 

 the machine is ope- 

 rated. On the side 

 of the pulley there 

 is a cam wheel, D, 

 which presses feed- 

 carrier, E, by a 

 spring, c, so that as 

 T) revolves, E moves 

 the fabric backward 

 and forward, in a 

 suitable manner to 

 feed it to the needle. 

 E also rests on ano- 

 ther cam, D, on the 

 puUej'jby which the 

 feed-carrier gains an 

 up and down mo- 

 tion, also, M^hich 

 presses the teeth of 

 the feed, d, into the 

 fabric, and when 

 they have moved it 

 far enough for ano- 

 ther stitch, the feed 

 is dropped down 

 and removed to its 

 position, without 

 coming in contact with the 

 fabric. The length of the 

 stitch is regulated by a small 

 lever, e, which moves in a 

 slot at the top of E, and ar- 

 rests the motion of E, when 

 it has moved back far enough 

 to grasp the fabric for ano- 

 ther stitch. A small pin, f, 

 projects from the face of D, 

 close to the periphery, which 

 works in a slot at the under 

 end of a bar, F, giving it a 

 reciprocating motion from 

 its centres, g, where it is 

 suspended, on the upper side 



