'^2 TiMEKEF.PEnS. 



Deseript ion ^"'^ ^^^ locking piece or pallat a. The two springs* BTid 

 and e fleets of and AV p3ss over it. This hole is made through the brass 

 esoaueineat as P^'^*^'^ QQQQ, through which by inverting the escapement the 

 constructed by manner in which the locking piece a holds the tooth 2 (or 

 nny other tovoth in succession) of the escapement wheel 

 may he seen. 



The impelling pallat HJIJI is supposed to be vibrating 

 freely from r to 6' 3 here it is pt^rfectly detatched, or at liber- 

 ty from the escapement wheel ; as will be seen by observing 

 that the unlocking pallat is not in contact with the dis- 

 charging spring Ne, nor are either of the teeth 3 or 4 of the 

 wheel in contact with the impelling pallat. The balance or 

 the impelling pallat (for they are both upon the same axis) 

 vibrating from r to S, the discharging pallat comes in con- 

 tact with the discharging spring Ne, see Fig. 6, (and from' 

 that instant it is not detached or free, but in the act of 

 escaping) and moving it in the direction from e to d, takes 

 the locking pallat a from off the interior an*le of the tooth 

 2, and sets the escapement wheel at liberty for the tooth 3 

 to act upon the angle in of the impelling pallat. Here the 

 tooth 2 will be seen to have passed the locking piece a, and 

 the tooth 1 to approach it. The tooth 3 pressing the im- 

 pelling pallat from r to S, and coniinuing to do so as in Fig. 

 7, where the centre of the escapement wheel, the angle w, 

 of the impelling pallat, and the centre G of both pallats' 

 form a straight line. This action of the wheel upon the 

 pallat continuing as in Fig, 8, where the point of the tooth 

 5 is about to quit the angle m of the impe'ling pallat^ the 

 tooth 2 approaching nearer to the circumference of the same 

 pallat, and the tooth 1 advancing toward the locking piece 

 or pallat s, against which it falls, and is held fast, as soon as- 

 the end of the tooth 3 quits the impelling pallat. Here the 

 act of escaping ends, and the impelling pallat is again de-' 

 tatched or unconnected with the wheel, and moves in free 

 vibration as in Fig. 3, for a certain number of degrees, until 

 it is returned by the power of the balance spring and repas- 

 .ses from S to r, still independent of the escapement wheel 

 or of any thing else, except the very little resistance which 

 is encountered by the discharging pallat 0, in repassing the 

 discharging spring Ne, which it d9es without disturbing the 

 locking piece a, or coUief]nently the escapement wheel, and 



con- 



