Fig. 10 is an enlarged view showing the construction
of clamp.
The relation of the spring, K, to the board, H, and to the other part
is shown in Fig. 9. It is attached to the side of the board and is
pressed upward by an adjusting screw near its fixed end.
The saw is driven by a wooden eccentric placed on the saw mandrel
shown in Figs. 1 and 2, and the spring, K, always pressed upward
against the eccentric by its own elasticity, and it is also drawn in
an upward direction by the upper spring. This arrangement insures a
continuous contact between the spring, K, and the eccentric, and
consequently avoids noise. The friction surfaces of the eccentric and
spring may be lubricated with tallow and plumbago. The eccentric may,
with advantage, be made of metal.
The tension of the upper spring may be varied by putting under it
blocks of different heights, or the screw which holds the back end may
be used for this purpose.
The saw is attached to the lathe by means of an iron bent twice at
right angles, attached to the board, H, and fitted to the tool rest
support. The rear end of the sawing apparatus may be supported by a
brace running to the lower part of the lathe or to the floor.
The simple attachments above described will enable the possessor to
make many small articles of furniture which he would not undertake
without them, and for making models of small patterns they are almost
invaluable.
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