XI. TIME. 



121 



Fig. 3. The pallet against 

 the second detent. 



Fig. 4. The pallet at its 

 lowest position. 



shown in plan in Figs 3a and 4a ; in Fig. 3a just before, and in Fig. 4a just 

 after the unlocking of the scape wheel. The pendulum having lifted G, 

 continues its swing to the extreme left, whence it was supposed started. 

 The scape wheel, free to move, lifts C and also E, the detent F, which is 

 weighted so as to rise of itself, following E's motion, and being in position 

 to hold C when the lifting is done, which is the case just before the next long 

 tooth of the scape wheel coming round and setting against H (which returned 

 to its normal position as C in lifting cleared it), the parts are again as 

 represented in Fig. 1. 



Such being the action, it is evident that the escapement is not only a 

 detached one in the sense in which all properly so-called gravity escapements 

 are so, that is, the pendulum is free from the scape wheel between the un- 

 lockings, but that the detachment is entire, seeing that the pendulum is never 

 in connexion icith the clock -train at all, being out of the way for the unlock" 

 ings, as well as between whiles. There is therefore nothing whatever to 

 affect its rate. 



The pressure of the scape wheel against the stop by which it is locked 

 varies. This variation, however, is altogether apart from the pendulum, as 

 unlocking is the work of the pallet. 



In the arrangement drawn the impulse is not given across the line of 

 centres ; it can, however, be so given ; and other modifications of the escape- 

 ment as here arranged can be made within the limits of its principles of 

 action, which are (1.) that the lifted pallet shall be held independently of any 

 variations in the lift, and (2) that the unlocking shall be apart from the 

 pendulum. 





