804 Transactions of the American Institute. 



excelled it in finish. The frame stands eight feet long, three wide, 

 and seven high. The main time wheel is three feet diameter, has 

 one hundred and eighty teeth, turns onee in twelve hours, has the 

 figures on its face, and a pointer gives the hour. The seeond wheel 

 is twenty-seven inches, has three hundred teeth, revolves every 

 hour, has the minutes on its face, and a pointer giving the time. 

 The third and scape wheel is eight and a half inches, turns once in 

 three minutes, and has the seconds pointed off. The pinions all 

 through, in both trains, have fifteen leaves. The scape wheel has 

 thirty pins of a new design, to prevent the oil from flowing on to 

 the wheel, and leaving the pins dry, a source of much annoyance 

 in all former pin escapements. The pallats are jeweled with agate, 

 and both pins and pallats have the greatest attainable polish. 



The pendulum is thirty-five feet long, and vibrates in three 

 seconds. The rod is two and a quarter inches diameter, and made 

 in sections of five feet, and secured by bands and screws firmly 

 together. The ball is four feet long, by seven inches diameter, 

 weighing three hundred and ninety pounds. This rests on a column 

 of zinc, with a little copper added, and furnished with set screws, 

 so that it can be adjusted to compensate from any portion of its 

 length. The weight on pendulum spring is about five hundred 

 pounds. The snail is secured to the main arbor, the lifting pin to 

 the second wheel. The retaining power is self-acting, and operates 

 the same as in the English lever watch. The pallats are held in 

 position by a set screw, and to set the train, needs only to be pushed 

 back out of gear. This arrangement of wheels and numbers pre- 

 cludes the necessity of any dial works on the movement, and we 

 get all the operations required by three wheels and two pinions. 

 Perhaps it will be better understood by going over the train the 

 other way. Thus the pendulum vibrates in three seconds, allowing 

 a pin to pass the pallats in six seconds. As there are thirty pms, 

 the wheel makes one revolution in one hundred and eighty seconds, 

 or three minutes. The pinion has fifteen leaves, and turns twenty 

 times in an hour; therefore the next wheel, to turn once in an hour, 

 must have twenty times fifteen, or three hundred teeth. The next 

 pinion having fifteen leaves to allow the main wheel to pass around 

 in twelve hours, it must have twelve times fifteen, or one hundred 

 and eighty teeth. It seems to me we could have nothing simpler 

 than this. Trinity has ten wheels and five pinions to do the same 

 work. Trinity sends for Sam to tell Jim to ask Jo to unlock that 

 striking. This lifts a finger, and 'tis done. 



