177 



C 175 ] 



sewing s>-?*; but, when another description of silk, called Bergam, is to 

 be prepared, then only one of the vertical bobbins is to be put in opera- 

 tion, and another thread is to be drawn from the stationary bobbin 1e. 



When very delicate threads are to be twisted, and doubled, it is pro- 

 posed to use a flyer, similar to that shown at figure 9, with the ends 

 turning down, and forming loops or eyes for the fine threads to pass 

 through. In case of any of the threads breaking, it would be nccessa-* 

 ry to stop the bobbin connected with it. This is done by moving the 

 lever /, which turns upon the fulcrum pin m, fixed in a stationary bar 

 crossing the machine. This lever embraces a clutchbox n, attached to 

 the rotary shaft on which the pulley d turns, and by moving the lever 

 / to the right or left by the handle o, the pulley d is locked into gear, 

 with the rotary shaft, or taken out of gear, and made stationary. As 

 any sudden starting of the bobbins would endangerbreaking the threads, 

 it is contrived that the pulley </, shall be gradually put into gear, which 

 is done by a circular inclined plane, on the face of the pulley, and a pin 

 on the inner side of the clutch. The clutch being slidden by the lever 

 towards the pulley, its pin moves upon the circular inclined plane un- 

 til it comes to the end, and there, striking against the raised edge, car- 

 ries the pulley round with it. The lever is held in its proper position 

 by a spring catch at o. 



The bobbin is held against the bearing board by a spring latch jt?, 

 which falls into a groove at the foot of the bobbin. These new ar- 

 rangements are deemed by the trade ver}'^ important improvements. 



Improved Power Loom. 



By J. H. Sadler, of Middlesex, machinist. 



The object of the patentee, is to give motion to the operative parts 

 of a loom, by means of a rotary power, so applied, that its mecha- 

 nism shall occupy no greater space than is required for the standing of 

 ^m ordinary loom. To effect this object, the main rotary shaft, which 



