NEW WATCH ESCAPEMENT. 1 7^ j 



the impulse is given without jarring, the inequality of I 



power through the train has no perceptible effect on the ba- ^ 



lance ; and no additional weight, however great, can pro- j 



duce more than a regular and gentle increase of impetus oa .; 



the balance. ] 

 I remain, Sir, 



Your most obedient servant, j 



S. MENDHAM. ■ 



Sir, ] 



,i 



Having attended the Committee upon Mr. Mendham's Opinion re- j 



escapement, I think it justice due to a man of genius to ^^^""^S it. | 



give my opinion farther upon it. j 



In viewing mechanical improvements, we should not con- i 

 fine our ideas to their present properties, but should consi- 

 der what improvements the principle will admit of. i 



As the principles of Mr. Mendham's escapement, and Compared j 



that of Mr. Mudge's, which obtained a bounty from govern- with Mudge»s. j 

 ment, are much the same, I shall compare the one with the 



pther. 4 



The impulse given to the balance without friction is i 

 exactly the same as Mudge's. The remontoir is bent tip 

 by the maintaining power in a similar way to that of 



Mudge's, but from the form of the pallet, which is a plain ■ 



surface, it is not so perfect. Mudge's, from the form of ; 



the pallet, bends the remontoir always to the same place, j 

 the other is bent higher or lower according to the force of 



the maintaining power, but by forming the pallet like ^ 



Mudge's it would render them alike in this respect. The ) 



only other objection is the spring detent, that detains the j 



wheel, when it drops from the pallet of the remontoir; it ; 



is the same as that of a detached escapement, consequently , 



exposed to the whole force of the maintaining power. To J 



compensate for these objections, the arc of vibration is not | 



limited like Mudge's, which is of great importance, and, ; 



having only one remontoir, it is more simple. It is, there- ^ 



fore, superior to Mudge's in having only one remontoir, '■ 

 and being unlimited in the arc of vibration ; it is superior 

 N 2 tft 



