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.
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