94. The pallets _B B'_ can be made of steel
or stone, and for all practical purposes those made of steel answer
quite as well, and have the advantage of being cheaper. A plate of sheet
brass should be obtained, shaped as shown at _C_, Fig. 95. This plate is
of thin brass, about No. 18, and on it are outlined the pallet arms
shown at Fig. 94.
[Illustration: Fig. 95]
[Illustration: Fig. 96]
[Illustration: Fig. 97]
[Illustration: Fig. 98]
To make the pallets adjustable, they are set in thick disks of sheet
brass, as shown at _D_, Figs. 95, 96 and 97. At the center of the plate
_C_ is placed a brass disk _E_, Fig. 98, which serves to support the
lever shown at Fig. 99. This disk _E_ is permanently attached to the
plate _C_. The lever shown at Fig. 99 is attached to the disk _E_ by two
screws, which pass through the holes _h h_. If we now place the brass
pieces _D D'_ on the plate _C_ in such a way that the pallets set in
them correspond exactly to the pallets as outlined on the plate _C_, we
will find the action of the pallets to be precisely the same as if the
pallet arms _A A'_, Fig.
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