TIMEKEEPERS. '^ f 



edge «?here the locking is effected. Was this angular part Description 

 to be left square, like the opposite end, it might strike »'^^ effects of 



. . , r 1 1 ., t''e detached 



against the interior angle of the tooth, as the escapement escapement a$ 

 spring returns to its place against the adjusting screw, after ^'-'"^^tructed by 

 having unlocked or discharged the wheel, but by being of 

 this figure it clears itself, 



Ne the discharging or unlocking spring, which is attached 

 to the escapement or locking spring at K, and passes under 

 the adjusting screw F, a little beyond the end dof the locking 

 spring. This discharging spring is made very slight and 

 delicate. 



F the adjusting screw supported by the pillar g-, whose 

 <vnd is opposite co the locking piece or pallat a, on the con- 

 trary side of the escapement or locking spring, and by which 

 the locking piece or pallat a, may be more or less advanced 

 upon any tooth of the wheel; the escapement spring BBd 

 always pressing the locking pallat o, against the end of the 

 screw F, except at the time of unlocking the wheel, 



0, The unlocking, discharging or small pallat, whose 

 part of action is a jewel. This pallat when the balance is 

 in motion, presses against the end of the discharging spring 

 at e, and passing on in a diiection from e to d, carries with 

 it for a short space, the discharging spring Ne, and also the 

 iocking spring BBd, moving them both at the same time, 

 and in so doing carries the locking piece a, from off the in- 

 terior angle of the tooth 2, (or any other tooth which may- 

 come into that situation) and leaves the wheel at liberty to 

 impart its power to the impelling pallat. But "when the 

 balance returns, and the unlocking pallat o repasses the dis- 

 charging spring Ne in a direction from d to e, it does not in 

 the lea-t disturb the locking spiing BBd, nor consequently 

 t!ie locking piece or pallat a, but moves only, and for a sl^iort 

 Epace, the unlocking spring Ne. HHH The impelling or 

 large pallat, whose part of action is at the angle m, where a 

 jewel is placed. Upon the exterior of this angle the pallat 

 receives its impulse from the cycloidal part of tlie tooth .of 

 the escapement wheel. The circumference of the pallat is 

 incomplete from a portion being cut away to make room for\ 

 the action of the teeth of the wheel. 



X. is a circular hole under the peripjiery b, of the escape- 

 ment wheel, over the centre of which the tooth 2 appears^ 



and 



