Fig. 2038.
[Fig. 2038] represents a swing frame for carrying and driving an emery wheel to be used on the surfaces of castings, its construction permitting it to be moved about the casting to dress its surface. The overhead countershaft carries the grooved driving wheel a. At b is a vertical shaft pivoted at i by the forked bearing which swings upon the countershaft. The fork l at the lower end of shaft b carries a shaft on which is the fork c′, c having journal bearing on it, and the driving pulley j. Fork d has journal bearing on the same shaft as pulley j, and is fast upon the rod or arm e, which affords journal bearing to the emery wheel k on a shaft having handles h h. Motion to the emery wheel is conveyed through the belts f and g. To counterbalance the frame the weight w is employed, permitting the frame to be readily swung. The upper fork carrying b, being pivoted to the shaft of a, permits b to swing to any required position. The pivot at i permits b to rotate in a vertical plane; the pivot of c′ c at d affords vertical movement to e; the pivot at d allows e to rotate about its own axis, hence the wheel k can be moved about laterally, raised, lowered, or have its plane of revolution varied at will by simply swinging the handles h h to the required plane. The emery-wheel shaft is pivoted upon the fork carrying it, so that the emery wheel can be turned to stand in a horizontal plane if desired.
Fig. 2039.
[Fig. 2039] represents an emery belt machine, in which the belt runs vertically and its tension is adjusted by the idler pulley shown at the top of the frame.
