In this design the belt is for each reversal of table motion moved across the loose pulley k from one driving pulley to the other, and therefore across two pulleys instead of across the width of one pulley only as in American machines.
Fig. 1560.
In American practice the rack r, [Fig. 1559], is driven by a large gear instead of by a pinion, so that the strain on the last driving shaft s, in [Fig. 1560], shall be less, and also the wheel less liable to vibration than a pinion would be, because in the one case, as in [Fig. 1559], the power is transmitted through the shaft, while in the other, as in [Fig. 1560], it is transmitted through the wheel from the pinion p to the rack r.
[Fig. 1561] represents a planer, designed for use in situations where a solid foundation cannot be obtained, hence the bed is made of unusual depth to give sufficient strength and make it firm and solid on unstable foundations, such as the floors in the upper stories of buildings. In all other respects the machine answers to the general features of improved planing machines.
Fig. 1562.