One hollow is cut during each forward travel of the carriage; and, when such travel is finished, a cam-disk, p, placed on the shaft, n, lifts the tool-carrier, b, and thus draws the cutting-tool out of the hollow cut by it, so that the carriage cam can then move back without restraint. In the interim, the sleeve, h, which supports the wheel, revolves one tooth through the following arrangement: On the axis, e, of this sleeve there are two ratchet-wheels, r and s, the number of whose teeth is equal to that of the teeth to be cut in the wheel. The wheel, r, produces the rotation of the sleeve, h, and the wheel, s, keeps the shaft stationary during the operation. The two wheels are set in motion by a lever, t, or by its click, this lever being raised at the desired moment on the free extremity of the driving shaft, n, by a wedge, u. The short arm of the lever, t, engages, through its point of appropriate shape, with the teeth of the wheel, s, so as to keep this latter stationary while the tool is cutting out the interspace between the teeth.

License information: nan
MPAA: G
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