The saw arbor can be raised and lowered by the use of the hand wheel which operates the screw b ([Fig. 3100].)
There is an accurate index located in front of the machine in sight of the operator, marked from 0 to 45°.
The iron table is of one piece 4 feet by 3 feet and fitted with the necessary groove slides for ripping and cross cutting gauges. It is also provided with removable piece e, [Fig. 3101], allowing the use of dado head, etc. The table is provided with a bevel slitting gauge s′, and cross cut or mitering gauge x′, [Fig. 3099], which in connection with the angular adjustment of the saw enables the operator to get every conceivable plain or double mitre ever required. The pulleys a′, b′, are made wide to allow the belt to travel as the saw is inclined. The pulley b′ takes up the slack of the belt. The countershaft and tightener are a part of the machine and can be run wherever a belt can be brought to them.
ROLL FEED CIRCULAR SAWS.
Figs. from [3102] to [3105] represent a roll feed circular saw, by J. Richards.
[Fig. 3102] is a side elevation, [Fig. 3103] a plan, and [Fig. 3104] a cross-sectional view through the rolls.
Fig. 3102.
In [Fig. 3102], p is the saw-driving pulley, t a stand for carrying the saw guides a, b, c, d, which are adjustable for height by means of the arm whose set screw is shown at u; at w is the spreader for opening out the board after it has been cut by the saw, and thus prevent its binding against the saw and heating it.