US221906A - Improvement in millstone supporting and driving devices - Google Patents

Description

i 3 Sheets-Sheet L 0. J. BOLLINGER.

Millstone Supporting and Driving Devices.

No. 221,906. Patented Nov'.25, I879.

- 3 Sheets-Sheet 2. 0. J.BVOLLINGE-R i Millstone Supporting and- Driving Devices. a N0. 221,906. Patented Nov. 25, 187-9.

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Millstone Supporting and Driving Devices. No. 22l,906.' Patented Nov.'25,.l87 9.

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FFI'GE,

OLIVER J. BOLLJNGER, OF YORK, PENNSYLVANIA.

IMPROVEMENT IN MILLSTONE SUPPORTING AND DRIVING DEVICES.

Specification forming part of Letters Patent No. 221,906, dated November 25, 1879; application filed February 20, 1879.

To all whom it may concern Be it known that I, OLIVER J. BOLLINGER, of York, York county, Pennsylvania, have invented Improvements in Devices for Support ng and Driving Millstones, of which the following is the specification.

My invention relates to devices for hanging, supporting, and driving a millstone, constructed as fully described hereinafter, to secure hard and durable bearings, reduce friction, prevent unequal wear and backlash, and permit nice and easy adjustment.

In the drawings, forming part of this specification, Figure 1 is a sectional elevation illustrating my invention; Fig. 2, a sectional plan oil the line 1 2, Fig. 1; Fig. 3, a section of the shaft, end piece, and driver; Fig. 4, a detached view of part of the step'; Fig. 5, a section showing a modification; and Fig. 6, a plan, in part section, of Fig. 5.

A is the spindle; B, the step; F G, the driver; and H the cone-bail. The step consists of a base-plate, N, secured by a central bolt, U, and having a tongue, at, at one side. A central cylindrical case, 0, rests upon this base, and is secured thereto by a bolt, I), ex-

tending through a slot, 0, in a lateral tongue, (1, into the tongue at of the base-plate, and on the sideof the case 0, opposite the tongue a, is a standard, f.

The slot 0 permits the case Oto be adjusted slightly in any direction horizontally, and setscrews m, extending through the lugs 12 on the base-plate, secure the case after adjustment.

A lever, B, bearing on the standard f, is formed near the end into a yoke, R, inclosin g the case 0, and is supported at the outer end by an adjusting-bolt, S.

The sides of the case 0 have slots g to receive lugs rat the inside of the yoke R, the said lugs having bearin gs for knife-edge projections p on an oil-box, P, thus suspended within the case 0.

An annular rib, 8, central with the edges of the projections 19, has a rounded outer face to permit the tilting of the oil-box in the case 0, without any lateral play of the lugs 19 upon their bearings.

The oil-box has a recess at its lower end to receive a rectangular block, V, of hard metal,

roundedor pyramidal at its under side, and flat on its upper face, upon which bears the flat lower end of the shaft, the latter passing through a liner or sleeve, Q, resting with its lower end on the corners of the block V, as shown in dotted lines in Fig. 2. Ribs 11, extending vertically outside of the block Q, coincide with ribs to inside the box P, leaving intermediate channels a", which communicate with the space W below the liner, and constitute, with said space, the oil-receptacle.

A screw-bolt, T, extending into an opening, 71, Fig.2, partly in the liner and partly in the oil-box, prevents the liner from turning.

The bottom end of the shaft A is hardened in any suitable manner, and having a flat bearat more than one point, and without interfering with the rotation of the plate to adjust the same. It also secures the plate firmly after adjustment.

By turning the plate N on the bolt U the lever It can be brought at any desired angle, horizontally, to the bridge-tree, and by moving the case 0 on the plate the shaft may be brought exactly to its vertical position, and, with the stone, may be elevated or lowered by adjusting the lever It, while the oil-box will swing upon its hearings to accommodate itself to any imperfection or maladjustment, thus avoiding all unequal wear of the liner, which, when worn, may readily be removed and replaced.

left, through which the oil may reach all the bearing parts, and all grit and sediment may pass from said parts to the chamber W to be afterward removed.

To avoid the heavy work necessary to forge the upper end of the shaft A to the proper shape, I employ a cast-metal end piece, D, terminating in a projection or cock-head, G, and

As the liner rests only on the corners of the block V, spaces i, Fig. 1, are

may be hardened or chilled in casting, so as v to secure the greatest possible durability and avoid the expense of the lathe-fittin g usually required.

The driver consists of a hub, G, through which extends the projection O, and from the ends of which arise two horns, F F, which extend into recesses b in the cross-bar J, the hub having recesses o, to receive ribs 0 on the projection O, which ribs terminate in knife-edges on which the hub Gr bears, so that the driver may rock thereon slightly and thus align itself with the cross-bar J, insuring an equal bearing of the hornsatall times, the ribs a further strengthening the cock-head.

The bearin gs of the driver-horns F F, in the mortises of the crossbar J, are on a plane or line with the point a of the spindle, so that in case the spindle should be out of tram (as it is usually termed,) no lateral strain is thrown on the point a, as would be the case were these points out of line with each other as in the common bail and driver.

The cone-bail H is secured to the stone in the usual manner, and the grain is fed either through the same, as shown in Fig. or outside the same, as shown in Figs. 5 and 6. I prefer the latter construction, as gum segments F may then be introduced in this form of construction between the horns and crossbar J, serving as lateral bearings for the horns and preventing the shocks or jars resulting from irregular motion of the engine.

I do not here claim the construction shown in Figs. 5 and 6, as the same may form the subject for another application for Letters Patcut; but

I claim 1. The combination of the plate N, the case 0, pivoted thereto at b, and adjustable thereon, and the oscillating oil-box P, supported by a lever, B, carried by the case and receiving the end of the shaft, substantially as set forth.

2. The plate N, carrying the oil-box bearing and lever B, and capable of rotation on the central bolt, U, securing the plate to the base, substantially as described.

3. The combination, with the case 0, of the yoked lever R, having bearings for lugs upon an oil-box provided Witha rounded edged rib,

vs, on a plane with the edges of the lugs, substantially as and for the purpose set forth.

4. The combination, with the flat ended shaft A, of a bearing-block, 'V, resting on a fiat surface and having a flat upper face, and rounded upon its under face, as set forth.

5. The combination, with the oil-box 'P and block V, of the liner Q, bearing on the corners of the block, substantially as specified.

6. A millshaft consisting of a plain cylindrical bar of wrought metal and a cast-metal end piece, provided with suitable shoulders and bearing faces and terminating in a hardened point, as set forth.

7. The combination of the cone-bail H, cross-bar J, and driver provided with upwardly-extending horns bearing laterally on the cross-bar at points opposite the bearin g of the bar upon the spindle, as set forth;

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

OLIVER J. BOLLINGER.

Witnesses:

F. T. Scorr, DAVID IRNEsT.

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