18,872.--BORING MACHINE.--A. Wyckoff (assignee by mesne assignments of La Fayette Stevens), Elmira, N.Y. Dated Dec. 15, 1857. Application for reissue received and filed Nov. 29, 1867.
1st, Ihe hollow cylindrical stock of an annular auger in combination with a spiral flange with such a pitch as will remove the cuttings horizontally as made and deliver them from the opening of the annular kerf, substantially as set forth.
2d, The combination of a hollow annular bit having their cutting lips projecting in the direction of the rotation of the bit, a hollow cylindrical stock and a spiral flange substantially as described.
3d, An annular bit formed in one piece and used in combination with a hollow cylindrical stock for cutting an annular kerf in a stick of timber, substantially as set forth.
4th, Ihe loose independent collar, f, provided with knife edges, g g, to keep it from turning for the purpose of furnishing a bearing for the head of the auger while in operation.
5th, The sharp annular spur, c, for the purpose of centering and guiding the auger and at the same time leaving a core of the material bored in the center of the auger, in the manner specified.
6th, The oblique traversing rests, O O, in combination with the screws, t t, and dogs, Q, for the purpose of adjusting the timber to the auger as described and holding it firmly while under the operation of the auger.
66,608.--DREDGING MACHINE.--James H. McLean, St Louis, Mo. Dated July 9, 1867. Application for reissue received and filed Nov. 8, 1867.
1st, The adjustable dredging frame, C, when such adjustment is produced by a derrick, i i, and fall, when constructed and operated substantially as shown and specified,
2d, The scoops, d, of a dredging machine having circular vertical cutting edges in advance of the usual lateral cutting edge, W, Fig. 1, when constructed and operating substantially as shown and specified.