US497304A - Churn-dasher - Google Patents

Description

BQGANNON. GHURN DASHER.

(No Model.)

Patented May 16, 1893;

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UNITED STATES PATENT OFFICE.

BURRELL CANNON, OF GLADEWATER, TEXAS.

CHURN-DASHER.

SPECIFICATION forming part of Letters Patent No. 497,304, dated May 16, 1893.

Application filed February 18, 1892. Serial No. 421,922. (No model.)

To all whom it may concern.-

Be it known that I, BURRELL CANNON, a citizen of the United States, residing at Gladewater, in the county of Gregg and State of Texas, have invented certain new and useful Improvements in Churn-Dashers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form part of this specification.

The object of my invention is to provide a churn dasher to which a rotary movement shall be imparted by the resistance offered by the fluid to the dasher when the latter is given a vertical reciprocating movement in the ordinary manner, the rotary movement being constantly in one direction, irrespective of the direction of the vertical reciprocating movement, and to this end my invention consists of the several details of construction and arrangement of parts hereinafter fully set forth in the specification and more particularly pointed out in the claim.

Referring to the drawings: Figure 1 is a perspective view of my improved dasher. Figs. 2 and 3, are vertical transverse sections of Fig. 1, showing respectively the position assumed by the blades on the upward and downward movements of the dasher, and, Fig. 4, is a cross section through one of the blades, showing its pivoted connection with the journal.

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

A represents a vertical dasher shaft to the lower end of which there is secured a revolving horizontal dasher. The hub B. of the dasher is formed of cast metal with its upper central portion projecting and made conical in form to lessen its frictional contact with the end of the vertical shaft, while its hori-.

zontal body is cast thick and made to extend at some distance beyond the lateral diameter of the vertical shaft, and is provided on its upper and lower edges with a lateral flange b, which form an annular recess E. between them on the periphery of the hub.

Through the vertical center of the hub B. there is a hole which loosely receives a screw bolt a, which is screwed into the lower end of the dasher shaft A. bringing only the small conical end of the hub in contact with the end of the shaft, thereby lessening the frictional contact and enabling free rotary motion of the horizontal dasher, as the lower extended central portion of the hub rests on the head of the bolt (1.

The horizontal dasher is provided with a rim 0. which is in size much smaller than the diameter of the horizontal portion of body of the hub B. the rim being only large enough to securely hold the ends of the journal rods D. radiating from the hub, thereby providing less surface for resistance and consequently a greater number of revolutions of the dasher will be made by the same force applied in a given time, than where the rim is enlarged or is provided with resisting elements for regulating the movement of the blades.

A series of radial blades E. are hinged on the journal rods D. by an overturn of the longestside of the blade over the top of the rod and bending it around beneath and up in front of the rod to the lower surface of the blade, while the upper surface of the blade remains straight as shown in Fig. 4. These blades gradually increase in width from their inner to their outer ends, as shown, in order to occupy nearly all the space inclosed between the rim and the hub of the dasher.

The ends of the rods" D. enter the periphery of the hub midway between the flanges b, which overhang their ends and the inner ends of the blades E. It will therefore be apparent that the blades E. are free to swing on the rods D. upwardly or downwardly from the horizontal plane of the rods and that such movement will be limited by the flanges b, and be substantially equal in both directions. The blades E therefore being free to reverse their inclination on each reversal of the vertical movement of the dasher the resistance olfered by the fluid to the blades in their upward or downward movement will tend to rotate the dasher in one uniform direction. This movement of the dasher will have the effect of imparting a reverse movement to the fluid in which the dasher is operated and so produce a strong centrifugal force, which combined with the vertical reciprocating action of the dasher causes, in the operation of churning, a rapid separation of the particlesof butter ICO from the milk, and thereby reducing the length of time neoesssry to perform this operation to a much shorter period than is usual.

Having thus fully described my invention,

5 what I claim as new, and desire to secure by Letters Patent of the United States, is-

In a churn the combination with a vertical shaft having a rotary dasher thereon provided with an outer rim, rods secured at one end in IO the rim and the other end in the hub, and a series of radial blades, having their sides passing over the top and pivoted around the rods, of a hub having upper and lower lateral

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