US36009A

US36009A - Improvement in balancing millstones

Info

Publication number: US36009A
Authority: US
Publication date: 1862-07-29
Anticipated expiration: 1879-07-29

Description

W. J. LEMUTH.

Balancing Millstones.

Patented July 29, 1862.- F723? UNITED STATES PATENT OFFICE.

WILLIAM J. LEMUTH, OF GREEN CASTLE, INDIANA.

IMPROVEMENT IN BALANCING MILLSTONES.

Specification forming part of Letters Patent No. 36.009, dated July 29, 1862.

To all whom it may concern:

Be it known that 1, WILLIAM J. LEMUTH, of Green Castle, in the county of Putnam and State of Indiana, have invented a new and useful Improvement in Balancing Millstones; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being bad to the accompanying drawings, making a part of this specification, in which- Figure 1 is a side sectional view of a millstone balanced according to my invention; Fig. 2, a plan or top view of the same.

Similar letters of reference indicate corresponding parts in the two figures.

This invention consists in placing a number of sliding weights in recesses in the back of the stone and in line with the top of the spindle on which the stone rests, as hereinafter fully shown and described, whereby the stone (the upper one of a pair, which is commonly termed the runner) may be perfectly balanced while in motion and under any speed, thereby producing better work than those balanced in the ordinary way.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A represents the upper stone or runner of a pair of millstones, which is hung on a spindle, B, in the usual way. -0 is the bridgetree on which the spindle B is stepped, and D the screw for adjusting the bridge-tree and regulating the height of the runner A. These parts, being arranged in the ordinary way and well known to all millwrights, do not require a minute description.

In the upper part or back of the runner Athere are made four recesses, a, which have a radial position and extend down below the center a in the under side of the bail E, in which the top of the spindle B is fitted. These recesses a are at equal distances apart, and in each one there is placed a weight, F, the recesses being somewhat longer than the weights, in order that the latter may be adjusted in the former at a greater or less distance from the center of the runner, as may be desired.

The weights are adjusted by means of screws G, which pass through them and fit in female screws therein, and also pass through the hoop H of the stone, and have square heads I) to receive a key by which the screws are turned. The screws G are prevented from casually turning by means of jam-nuts c c, which are placed on them at opposite sides of the hoop H, which covers the outer edges of the recesses a.

The centers of the weights F are in line or about in line with the top of the spindle B, and consequently it will be seen that by adjusting the weights F the runner A may be perfectly balanced when in motion and under any rate of speed. To effect this result it is essential that the weights be in line with the top of the spindle, for if they are out of line with and above it the stone may be balanced when at rest, but not when in motion, for the centrifugal force generated by its rotation will cause the stone to rise at the side which has the farthest outward weight. The reverse will be the case if the weights are below the bevel of the top of the spindle; hence it will be seen that the old mode of balancing the runner by inserting fixed weights in the top of the back of the stone will not effect'the result in a proper manner, and the runner cannot produce as good work as when properly balanced.

I am aware that adjustable weights have been applied to millstones; but they havebeen arranged in a comparatively complicated way, and in such a manner as to be adjustable in a vertical direction, requiring considerable care in their manipulation in order to balance the stone.

By my arrangement the work may be quickly done and the invention may be ap plied at a small cost to any stone in use.

I do not claim, broadly, the application of adjustable weights to millstones for balancing the same, for they have been previously used; but

I do claim as new and desire to secure by Letters Patent- The employment or use of adjustable weights F, fitted in or applied to the runner A of a pair of millstones in such a manner as to be capable of being adjusted horizontally nearer to or farther from the center of the runner and in line with the top of the spindle of the same, as and for the purpose herein set forth.

WILLIAM J? LEMU'IH.

Witnesses:

OoLBuRN N. CARTER, PHILIP Boon.