Fig. 3086.
[Fig. 3086] represents a swing-frame saw that is mounted over a work bench, and can therefore be used without necessitating carrying the work from the bench. It consists essentially of a frame pivoted at the upper end to the pulley shaft and carrying below a circular saw driven by belt over pulleys on the upper shaft and the saw arbor. In this machine the iron hubs carrying the frame have sockets fitting over the outer diameter of the hanger hubs, so that the frame hangs upon those hubs and not upon the pulley shaft. The advantage of this plan is that the frame joint is relieved of the wear which would ensue were it hung upon the revolving spindle, while at the same time the movement of the joint is so small as to induce a minimum of abrasion. To counterbalance the frame while it is placed out of the perpendicular, there is provided a compensating weight as shown in the engraving.
Fig. 3087.
[Fig. 3087] represents an example of that class of cutting-off saw bench in which the length of the work is determined by the width apart of the saws.
This machine is constructed by Trevor and Company, and is designed for cutting barrel staves to exact and uniform lengths.
Fig. 3088.