US1215214A - Dasher. - Google Patents

Description

CHARLES A. s'rnwanr, or woacEs'rnR, MASSACHUSETTS.

DASHER.

Specification of Letters Patent.

To. all whom it may c ncern:

Be it known that I, CHARLES A. STEWART, a citizen of the United States, residing at Worcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Dasher, of which the following is a specification. r

This invention relates to a dasher particularly adapted for small churns, but caconverging toward the pable also of use for large churns and for use as an egg or batter beater,cream whip, and for other similar purposes.

The principal objects of the invention are to provide an inexpensive form'of dasher which will have more effective meansthan has been known heretofore for subjecting the semi-liquid material in which it is used to the necessary rapid blows and causing its circulation in such a manner as to churn or mix it to the greatest degree of effectiveness, and at the same time to provide'aconstruction which will afford a minimum resistance" against the liquid for its The invention further features of construction of the dasher itself without reference to the particular kind of receptacle or churn in which it is to be used.

Reference is to be had to the accompanying drawings in which Figure 1 is an elevation of a transparent churn showing a preferred form of this invention applied thereto and in operation;

Fig. 2 is a side elevation of the dasher;

Fig. 3 is an end elevation of the same, and

Fig. 4 is a top view thereof showing the dasher rod Or shaft in section.

In its preferred form this dasher is made to consist of two parts only, a shaft or rod 10 and a dasher blade 11. This rod is of the usual straight cylindrical type and is slitted diametrically at its lower end to permit a flat portion of the dasher blade to be inserted and soldered or otherwise fixed thereto.

The dasher blade consists of three parts, two blades 12, and a central member 13, all integrally connected together and in fact consisting of a single piece of sheet metal formed to shape. The central member is located vertically and centrally with respect to the rod 10 which is secured to it. It is of a general triangular shape, its outer edges top, and diverging toward the bottom on a straight line. At the bottom it is cut out at the center to proper operation.

consists in certain form a passage 15 through it for a purpose Patented Feb. 6, 1917.

Application filed May 31, 1916. -S e1'ia1No. 100,794. l

to be described, but this passage doesnot extend to its edges, these edges being preserved beyond the passage so as to form trough for engaging and guidingthe current of liquid. r

The two blades 12 are formed at opposite edges of the central member 11, and are preferably flat, but they are located at opposite inclinations corresponding with the inclinations of the edges of the central member. These blades preferably extend clear from the top of the centra'l'member to its extreme bottom, and are shown as rectangularin form. They are symmetrically located with respect to the shaft, and itis obvious that theydiverge away from it toward the bottom. I 1

I am aware of the fact thatmany forms ofchurn and beater dashers have been made and suggested, but this invention possesses important advantages joverthose forms with which I am familiar. by having only two blades a material sweep is given to each blade in its action of strik- In the first place, v

mg the liquid and forcing it to form a current in the receptacle, and this is not interrupted by intermediate blades which are often used without adding to the efliciency of devices of this kind. The use of the flat web between the blades is important because this flat member takes up practically no room and allows the dasher to operate on the liquid that extendsclear to the center of the device, which is not possible when a large hub is used. The inclined portion which is provided at each side of the dasher by the bend which joins the blade with the central member tends to. force the liquid down uniformly on both sides of the shaft -without interruption. By extending the central member down to the ends of the blades this action is given its maximum efliciency and yet by cutting out the central member at the bottom at 15 a very large reduction is secured of the resistance due to the liquid at the center, which cannot be efficiently churned or beaten by the dasher or the hub thereof. In other words, this liquid affords no resistance to the rotation of the dasher. Ordinarily this liquid is not oper: ated on efficiently because it is so near the center and the true principle is simply to, get it into the current which flows down at the center and up at the sides as'will appear from Fig. 1, and not attempt to beat. it until it has entered this current and been aware of the fact driven away from the center. This construction does away with the usual solid hub that is employed in this class of'churns, this hub having no function except to hold the blades. The hub usually employed takes up considerable room and interferes with the circulation whereas all these disadvantages are overcome by the present construction.

The device is particularly advantageous on account of its simplicity, cheapness of manufacture and the ease with which it can be cleaned. Although it has the necessary angles for causing the desired circulation of liquid, it has no rentrant angles that cannot be readily cleaned, and no spaces where dirt can lodge. The dasher is fastened to the shaft in the most simple manner possible-without the use of fastening devices and without providing any spaces for the reception of the liquid in which the dasher is operated Although Ihave illustrated and described only a single form of the invention am that modifications can be made therein by any person skilled in the art without departing from the scope of the invention as expressed in the claims. Therefore I do not wish to'be limited to all the (1013168 of this patent may be obtained for five cents each, by. addressing the details of construction herein shown and described, but what-I do claim is 1. As an article of manufacture, a churn dasher comprising two oppositely inclined flat blades and a thin vertical central web memberconnecting them and constituting a support therefor, said central member having a passage therethrough extending up from the bottom for the liquid in which it is used, to reduce the resistance toits operation, and provided with flanges at the sides of said passage extending the full length of the inclined blades to form troughs at the bottom for engaging and guiding the current of liquid. 7 1 g 2. As an article of manufacture, a dasher for the purposes described consisting of a single piece of sheet metal bent in three planes, the vertical height of the three parts being substantially the same, but the central one having a passage therethrough at the bottom extending from a point a material distance from one of its edges to a corresponding point near the other edge.

' In testimony whereof I have hereunto set my hand.

CHARLES A. STEWART.

Commissioner of Eatents,

Washington, D. G.

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