US891764A - Churn. - Google Patents

Description

m. 891,764. BATENTBD JUNE-2s, 1908 'J. B. DAVIS m. COPELAND.

GH URN APPLIOATION FILED NOV. 30, 1907.

2 SHEETS-SHEET 1.

M y M "No. 891,764. PATENTED JUNE 23,1908. J. B. DAVISVGL B.GOPELAND.

GH URN.

APPLIOATION rum) NOV. 30, 1907.

2 s'HBETs -sHBET 2'.

UNITED STATES PATENT OFFICE.

JOHN BROOKS DAVIS AND BURT COPELAND, OF ABINGDON, ILLINOIS, ASSIGNORS TO ABINGDON OHURN 00., A CORPORATION OF ILLINOIS.

CHURN.

Specification of Letters Patent.

Patented June 23, 1908.

To all whom it may concern:

Be it known that we, JOHN BROOKS DAVIS and BURT COPELAND, both citizens of the United States, and residents of Abingdon, in the county of Knox and State of Illinois, have invented a new and useful Churn, of which the following is a specification.

Our invention has for its objects the improvement of churns having rotary dashers, and the nature of the invention consists in the novel construction of the dasher, of its bearings, of the coupling by which the actuating shaft and dasher are united, in subserving economy in the manufacture, and in constructions and combinations hereinafter set forth.

Mechanism showing our improvements and the adjacent parts of a churn in which they are incorporated, is shown in the accompanying drawings, in which Figure 1 is a side elevation; Fig. 2, a vertical central section, the operating parts being shown in elevation; Fig. 3, a plan of the dasher, seen from below; Fig. 4, a vertical central section thereof; Fig. 5, a detail, an elevation of the coupling; Fig. 6, a vertical central. section in the line 6-6 in Fig. 5, seen in the direction of the arrows; Fig. 7, an elevation of the upper coupling-member; Fig. 8, a like view of the lower member thereof; Fig. 9, a top plan of the parts shown at Fig. 8; and Fig. 10, an enlarged fragmental section of the dasher and its bearing.

Throughout the specification and drawings the same reference numeral indicates the same part.

2 indicates a frame comprising a fioor composed of sills 3 on which the cream-can rests, front and rear frame bars 4 which hold the can from displacement forwardly or rearwardly, vertical bars 5, inclined bars 6, a horizontal top 7 which is slightly cut away at its front for the passage of the dasher shaft, and braces 8 and 9. The top supports a vertical arch or bracket 10 and has at its top a horizontal bearing 11 for a shaft 12, and has also vertical bearings 13, 14 for a dasher-actuating shaft 15 which carries at its lower end an integral coupling-member 16 consisting of a cylindrical portion 17 having a wedge-shaped recess or socket 18 in its side, and an annular bead 19 at its lower edge. A friction sleeve 20 slidably surrounds the member 17 for a purpose presently related. Fixed on the proximal end of l the shaft 12 is a bevel gear wheel 21 provided I l with a crank-arm 22, and on its distal end is fixed a similar but oppositely disposed crank-arm 23. The wheel '21 gears with a bevel pinion 24 fixed on the shaft 15 which it actuates in an ordinary manner. The construction of all the foregoing parts except the coupling member is optional and need not be further described.

The dasher shaft comprises a squared main portion 26, a lower constricted cylindrical portion 27 which has an axially bored conical recess 45 in its end, and a tapered shank 31 which fits into the longitudinally bored socket 28 of the lower member 29 of the coupling, which member carries at its upper portion an integral wedge-shaped head 46 disposed at one side of the center thereof and is adapted to fit snugly within the corresponding recess in the other member, thus completin a cylindrical head which is held very firm y from wabbling by a friction sleeve 20 slidably mounted on the member 16 and restrained thereon by the bead 19. The coupling-member 29 is held from revolution on the shank 31 by a screw 32. The dasher 33 is in the form of a star wheel, the spokes being sawed (by a band-saw) to form arciform spaces 34, and has a radial aperture through which a non-corrosive plug 44, preferably of wood, is driven into a coinciding one in the constricted member of the shaft after the latter has been inserted into a longitudinally disposed central aperture in the dasher wheel, the point of the constricted member preferably extending a distance therethrough. This construction not only furnishes a strong union, but conduces also to health and cleanliness as neither metal, nor glue, both of which are affected by boiling in water, which process churn dashers are frequently subjected to, is used.

The cream-can 42 shown is squarein cross section and is provided with handles 36, a spout 37 and a strengthening bead 38 in a well known manner. Soldered to the bottom of the can, centrally thereof, is the base of our improved bearing 39 comprising a sheet metal cone-shaped base 40, a drop of solder being carefully shaped and positioned on the a ex thereof to form a head or bearing 41. This careful shaping is essential in order that the bearing thus formed be neither conical norspherical, but rather inclined to flatness on its bearing face in order that a very small portion of its surface will contact the conically bored portion of the dasher-shaft. In other words, the cross section of the head is greater than the thickness thereof. The bearing so formed will be much more durable than would one of wood contacting wood, or metal contacting metal; there is less friction because of the peculiar quality of the solder; and it is decidedly economic of manufacture.

Having thus described our invention, we claim as new:

In a churn, a cream-can comprising a receptacle and a dasher support fixed centrally of the bottom thereof and consisting of a 1 sheet of metal bent into conical form and an integral bearing at the apex thereof greater I in cross-section than the cross-section of said apeX, and the cross-section of the bearing greater than its depth, in combination with a dasher shaft provided with a conical bore 20 at its lower portion, wholly within which said bearing is adapted to rest, but the sheetmetal support to be free from contact with said shaft.

In witness whereof we have hereunto set 25 our hands this 23rd day of November, 1907, at Galesburg, Knox county, Illinois.

JOHN BROOKS DAVIS. BURT COPELAND. Witnesses:

CHAs. S. HARRIS, H. M. RICHARDS.

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