The
parts which go to make up the detent _D_ consist of the "detent foot"
_F_, the detent spring _h_, the detent blade _i_, the jewel pipe _j_,
the locking jewel (or stone) _s_, the "horn" of the detent _k_, the
"gold spring" (also called the auxiliary and lifting spring) _m_. This
lifting or gold spring _m_ should be made as light and thin as possible
and stand careful handling.
We cannot impress on our readers too much the importance of making a
chronometer detent light. Very few detents, even from the hands of our
best makers, are as light as they might be. We should in such
construction have very little care for clumsy workmen who may have to
repair such mechanism. This feature should not enter into consideration.
We should only be influenced by the feeling that we are working for best
results, and it is acting under this influence that we devote so much
time to establishing a correct idea of the underlying principles
involved in a marine chronometer, instead of proceeding directly to the
drawing of such an escapement and give empirical rules for the length of
this or the diameter of that.
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