It belonged to a railroad engineer, however, who wanted it placed in first class condition, as it had not been satisfactory. The first five position test showed an error of twenty-four seconds as per second column Fig. 21.
Examination of the motion, pivots, regulator pins, escapement and poise proved them to be satisfactory.
The hairspring however, was found to be pinned at the slow pendant up point as per illustration in Fig. 22.
| No. ...248027........... Make...Hamilton........ | |||||||
|---|---|---|---|---|---|---|---|
| D U | + 8 | + 8 | + 2 | + 2 | P | ||
| D D | +16 | + 8 | + 3 | + 1 | |||
| P U | 0 | -16 | + 2 | - 1 | |||
| P R | + 4 | + 4 | + 2 | - 3 | |||
| P L | - 1 | - 5 | - 6 | - 5 | |||
| 24 | 7 | ||||||
The alteration made was to break out one-half of the inner coil at collet so that it was pinned at the fast point as illustrated in Fig. 23.
A pair of balance screws were removed and a heavier pair fitted to correct the mean time, which would have been about ten minutes fast in twenty-four hours because of shortening the spring.
The balance was repoised and the next test in positions showed a variation of seven seconds as per fourth column Fig. 21.
The time required for making the alteration was about one half hour.
Fig. 22-23