Thiout, master-horologist, at Paris in 1727.
_P P'_ are the two levers or pallets separately pivoted. Upon the axis
_V_, of the lever _P_, is fixed a fork which communicates the motion to
the pendulum. The two levers are intimately connected by the two arms _B
B'_, of which the former carries an adjusting screw, a well-conceived
addition for regulating the opening between the pallets. The
counter-weight _C_ compels constant contact between the arms _B B'_. The
function is always the same, the recoil and the impulsion operate upon
the two pallets simultaneously. This escapement enjoyed a certain degree
of success, having been employed by a number of horologists who modified
it in various ways.
VARIOUS MODIFICATIONS
Some of these modifications we shall show. For the first example, then,
let Fig. 162 illustrate. In this arrangement the fork is carried upon
the axis of the pallet _P'_, which effectually does away with the
counter-weight _C_, as shown. Somewhat more complicated, but of the same
intrinsic nature, is the arrangement displayed in Fig.
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