US148061A

US148061A - Improvement in millstone-drivers

Info

Publication number: US148061A
Authority: US
Publication date: 1874-03-03
Anticipated expiration: 1891-03-03

Description

M. HOLDEN.

Mill-Stone Drivrs NOV.148,06\ Patented M a rch 3.1874.

Witnesses: In enmr: A Wag 77. p /M Q/Q Per Anumeys.

UNITED STATES PATENT Orrron.

MOOR HOLDEN, OF CINCINNATI, OHIO.

IMPROVEMENT IN MlLLSTONE-DRIVERS.

Specification forming part of Letters Patent No. 148,061, dated March 3, 1874; application filed June 21, 1873.

To all whom it may concern Be it known that I, Moon HOLDEN, of Oincinnati, Hamilton county and State of Ohio, have invented a new and useful Millstone- Driving Eye, of which the following is a specification:

My invention relates to an improved form of those combined sockets and bushings in one piece or casting which are embedded permanently in the eye of the runner, and which operate to balance and drive the same, while at the same time serving as an inlet for the grain; and my improvements are designed to combine in the most perfect manner the advantages of easy and certain feed with a firm yet delicate poise of the runner, whereby the latter is enabled to readily accommodate itself to the face of the bed-stone without binding or raking, and, consequently, without loss of power or the liability to overgrind, scorch, or kill the flour.

In the accompanying drawing, Figure 1 is an axial section of my improved driving-eye in position upon the spindle, whose upper portion only is shown. Fig. 2 is an under-side view of the same, the spindle being shown in transverse section.

My bushing A is in the form of a hollow conical frustum, which flares downward, in the manner shown, and from the exterior of .whose lower margin there project lugs a. a,

whichare embedded in the substance of the runner, whose eye the said bushing lines. Suspended centrally within the bushing A, by

, means of arms B B ,'is my socket 0, whose eX- terior portion is a conic frustum concentric with the bushing, and whose interior is square and tapers upwardly to receive the correspond ingly square and tapering head I) of the spindle, which latter is made suiiiciently smaller than said socket to permit the necessary play or automatic tram of the runner when in oporation. The arms B B are chamfered on their under side, and are located near the top of the eye. A steel cock, E, at the summit of the berof advantages, which, as a whole, are believed to constitute a valuable novelty.

The flare of the bushing enables its peripheral surface to share with the lugs a a the support of the runner, and its smooth interior surface and downwardly-increasing area are further useful, by assisting the descent of the grain, which, in vthe old-fashioned cylindrical eye, is liable to wreathef and choke in consequence of the accumulating vortical action generated by the rapid rotation of the runner. The chamfered under surfaces of the arms B B assist in beating down the grain in whichever direction the runner may be rotated, and their location near the top of the eye causes them to offer the least practical obstacle to the descent of the grain, which at this point descends more freely and directly than it does lower down in the eye after it has been subjected to a longer continuance of vorticalaction.

The driving-surfaces D, being four in numher, and as near as practicable to the axis of revolution, offer the least possible resistance to the tram of the runner, and enable it to easily assume and maintain exact parallelism with the bed-face; in other words, the runner is driven with equal stress and equal resistance all around its plane of rotation, and has no tendency to bind in one vertical plane, as is apt to be the case when impelled by two opposite drivers, which enter and play within the body of the runner beyond the circumference of the eye.

Disclaiming novelty in a square and tapering spindle-socket unit-ed rigidly to a downfiaring bushing embedded in the runner,

I claim as new and of my invention- The driving-eye consisting of bushing A a a, arms 13 B, chamfered below, located near the entrance of the eye, and affording rigid connection of the eye with the upper part only of the socket G, having a taperingsquare cavity for a spindle of corresponding form, substantially as set forth.

Witnesses: MOOE HOLDEN.

W. L. ALDRICH, THEO. G. MORY.