About the best way of fitting up the
foot _F_ seems to be to provide it with two soft iron steady pins (shown
at _j_) with corresponding holes in the chariot, said holes being
conically enlarged so they (the pins) can be bent and manipulated so the
detent not only stands in the proper position as regards the escape
wheel, but also to give the detent spring _E_ the proper elastic force
to return in time to afford a secure locking to the arresting tooth of
the escape wheel after an impulse has been given.
If these pins _j_ are bent properly by the adjuster, whoever afterwards
cleans the chronometer needs only to gently push the foot _F_ forward so
as to cause the pins _j_ to take the correct positions as determined by
the adjuster and set the screw _l_ up to hold the foot _F_ when all the
other relations are as they should be, except such as we can control by
the screw _G_, which prevents the locking jewel from entering too deeply
into the escape wheel.
In addition to being a complete master of the technical part of his
business, it is also desirable that the up-to-date workman should be
familiar with the subject from a historical point of view.
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