174 TRANSACTIONS OF THE 



MACHINERY No. 8. 



SEWING MACHINES. 



Wheeler Sf Wilson'' s Sewing Machine. 

 Wheeler & Wilson Manufacturing Co., 343 Broadway, New- York. 

 The excellence and superiority of this machine consists, in the 

 firm and durable seam which it forms, of pqual beauty upon each 

 side of the fabric sewed, and made with ecoxlomy of thread; in 

 the simplicity and thoroughness of its construction; the elegance 

 of its model and finish; the facility of its management; the ease, 

 rapidity and quietness of its operation; and its applicability to a 

 variety of purposes and materials. 



The stitch made by this machine is illustrated by the diagram, re- 

 presenting a section of fabric sewed with it. It is formed with two 



threads, e and z, one being above 



___ the fabric and the other below 



ML 



^^^^^^ it, and interlocked at each stitch 



in the centre of it. The same 

 thread does not appear alter- 

 nately above and below the fa- 

 bric at each stitch, but that above 

 the fabric is exclusively the thread e, and that below the fabric 

 is exclusively the thread z. It may be made by hand in a man- 

 ner analagous to the method of making it by the machine, as 

 follows : 



Take two pieces of fabric, c,and an ordinary needle, h, threaded, 

 and a small ball of thread, f; tie the ends of the threads togetlier, 

 leaving an inch or two of the thread z unrolled from the ball; 

 thrust the needle h head first through the fabric, withdraw it 

 slightly, seize the loop thus formed by the upper thread, enlarge 

 it, and pass the loop around the ball, as in fig. 1, withdraw the 

 needle entirely from the fabric, and draw up the loop, so that the 

 interlocking point of the two threads e and z will be in the centre 

 of the fabric, A succession of stitches thus made wall form a 

 seam, presenting the same appearance upon each side, a single 

 line of thread extending from stitch to stitch. Two and one-half 

 yards of thread is a fair average for a yard of seam. The scam is 



