On referring to Fig. 4 it will be seen that this gin nses no ribs or grating. A is the grate-fall or breast hinged to the main frame at a. It is the back-board ; 0, the seed-board ; and D the brush for removing the lint from the cylinder. E is the gin fling-cylinder, which in the machine occu pies substantially the same position as the saw-gin cylinder in common use, the grate, grid, or ribs being removed, and a bar, secured in the concave c.
The cylinder E, shown in detail (Fig. 5), consists of a sheet or thin plate of metal, G, pref erably steel, which is bent in a cylindrical shape, having its meeting edges secured together around heads or disks, preferably of wood. Said cylinder may consist of a number of smaller cylinders or sections. M. The ad vantage of making the cylinder E of a number of sections is, that in case one section becomes injured it can easily be removed and another substituted. The several sections should be placed closely together side by side, and so fastened by any eon venient means, Before the sheet ti is secured upon its support there is formed therein a number of slots o, disposed longitudinally across the surface, or in direction of the axis of the cylinder. Tim each slot is dueed a pointed tooth, g,lying length wise the slot. Ily reason of the tooth being tapered and pointed and ar ranged in the slot, there is an open space extending directly in front of the point of the tooth and around the same on both sides. This is the
opening already referred to. in which the cotton can enter by its elasticity and softness when pressed against the periphery of the cylinder.
The openings and teeth in the sheet G are made with the sheet flat. When the sheet is bent in cylindrical form. the teeth being attached only on one end will not naturally partake of the curved shape of the bent sheet, but will remain straight, or, in other words, will remain tangential to the circumference. The elevation of the point is, however, so slight as not to enable it to engage with hard foreign substances in the cotton, while on the other hand it is suffi cient to allow it to penetrate. as al ready stated, through the soft cov ering of the seed before drawing out the fiber, as the rotation of the cylinder continues. Returning now to Fig. 4, the operation of the machine is as follows: The seed-cotton is placed in the receptacle K and meets the toothed surface of the cylinder E.
which rotates in the direction of the arrow 4. The teeth upon said cylinder engage only with the cotton-lint, as already described, and carry the same past and under the bar F. which prevents seeds and other foreign substances being drawn around the cylinder with the lint. As the cylinder continues its revolution, the lint is removed from its teeth by the brush wheel D, from which the cleansed material passes out of the machine in the direction of the arrow 5.