This cut is a sectional view of our improved oil bush. A shows the mill spindle, B B, B B, is the collar or part that turns with the spindle and is secured firmly to it. The parts E E E E, show the upwardly projecting sleeve at some distance from and encircling the spindle or shaft, and forms the inner wall of the oil chamber. C C C C are two of the four followers or segments lined with the best anti-friction metal. The wedges N N, are raised or lowered as circumstances require by the four metal screws, two of them being shown at S S; by this means the followers and spindle are adjusted with great precision. D D D D forming the outer wall of the chamber, and E E E E its bottom and inner part, gives us a complete oil well in which the followers, collar of spindle, &c., are immersed. THE OPERATION is as follows: the rotating shaft or spindle carries with it the collar or sleeve bearing and produces centrifugal force in the chamber, by which the oil is driven up the sides of the passages and followers; the bearing is thus made to move constantly in oil. No oil can escape except when necessary to draw off at the orifice provided with the thumb screw K, when a fresh supply is needed. This simple self-oiling arrangement is the best thing in use for fast running upright bearings of any kind. BULLOCK’ MILL BUSH. Patented December 31, 1867. [Illustration: _Fig. 1_] The object of the invention which is herewith illustrated, is to enable the spindles of mill-stones to be adjusted with perfect accuracy, and at the same time furnish bearings of anti-friction materials, which may be kept constantly and perfectly lubricated, and from which all extraneous dust or grit, calculated to aggravate friction, may be kept excluded. Fig. 1 is a perspective view of this improvement, and Fig. 2 is a sectional view of the same, showing details of construction. A, Fig. 2, is the spindle, playing in segmental bearings B. There are four of these, which, together, make up the entire bearing for the spindle. They are hollow, as shown in the engraving, and faced with anti-friction surfaces. The outer sides of these segments are inclined, these surfaces resting against the inclined inner surfaces of the hollow binding wedges C. Through the lower part of these wedges pass hooked bolts, D, with thumb nuts at their lower ends, by turning which the wedges are forced upward, and the segments B being prevented from rising by the top plate E, are forced inward till their surfaces are brought in proper proximity to the spindle. [Illustration: _Fig. 2_] It is evident that by raising and lowering these wedges, as circumstances require, the spindle can be adjusted with the greatest accuracy.