The Modern Clock A Study of Time Keeping Mechanism; Its Construction, Regulation and Repair
CHAPTER XXIII.
CLOCK CASING AND CASE REPAIRS.
PRECISION CLOCK CASES.—The casing of a precision clock is only secondary in importance to the compensation of its pendulum. The best construction of an efficient case can be ascertained only by most careful study of the conditions under which the clock is expected to be a standard timekeeper, and often the entire high accuracy sought by refined construction is sacrificed by an inefficient case and mounting.
The objects of casing a precision clock are as follows:
a. To protect the mechanism from the effects of dust and dirt.
b. To avoid changes of temperature and barometric pressure.