US1704583A - Flour sifter - Google Patents

Description

Marqh 5, 1929. R. M. WELCH FLOUR SIFTER Filed Aplil 13, 1928 2 Sheets-Sheet .Rzzi M ATTORNEY WITNESS:

March 5, 1 929. a w c 1,704,583

FLOUR SIFTER Filed April 13, 1928 2 Sheets-Sheet 2 fizz/21% in h/ ATTORNEY VENTOR Patented Mar. 5, 1929. p

7 UNITED STATES RUTH M. wnLcH, or HooKnn, OKLAHOMA .rLoUn sirrnn.

Application filed April 13, 1928. Serial No. 269,802.

This invention relates to sifters primarily adapted for sifting flour any number of times without necessitating emptying flour within other receptacles. 1

An object of the invent-ion contemplates a V bowl adapted to receive the sifted flour and which when inverted within the sifter will redeposit the sifted flour within the sifter and subsequently return to a normal position to 1 again catch theflour as sifted.

Another object of the invention comprehends scoops or carriers operable within the bowl and which when operated in conjunction with the agitating apparatus of the sifter will lift and return the sifted flour to the screen or sifter whereby the sifting operation is a continuous one.

An additional object of the invention embodies a restricted entrance opening for the bowl and which when disposed at an inclination will prevent loss of the flour incident to the suction created by action of the scoops or carriers. p

More specifically stated the sifter is provided with holder elements ferret-aiming the bowl in different positions.

With the above and other objects in view, the invention further consists of the following novelfeatures and details of-construction, to be hereinafter more fully described, illustrated in the accompanying drawings and pointed out in the appended claims.

In the drawings v 1 I Figure l is a horizontal sectional View taken through the invention.

Figure 2 is a sectional view taken on line 22 of Figure 1.

adapted to journal the adjacent portion of an agitator shaft therein, whichin turn has its opposite extremity journaled within a hearing thimble 13. The opposite end of the shaft 12 terminates to provide a gear handle 14, by

Figure 3 is a top plan view of the invenextended horizontally from the housing is means of which rotation may be imparted thereto.

A screen of semi-spherical shape, such as 1ndicated at 15, is provided with an annular band 16 upon the periphery thereof. 1 The innermost end of the bearing ,nipple 13 is threadedly engaged with the band 16 to rigidly retain said screen in the position shown in Figures 1 and 2. The agitator shaft12 merely extends through openings provided in the opposite sides of the band.

Agitator or heater arms 17, extended from hub members 18 upon the shaft 12, are adapted to selectively and frictionally engage the bottom of the screen15 when rotated in conjunction with the shaft 12. One of the hub members 18 is t-hreadedly'engaged with the shaft 12, in the manner as illustrated in Figure 1 of the drawings. g

A bowl 19, having the particular cross section, as illustrated in Figure-2 of the drawings is rotatably mounted upon both the shaft Y12 and nipple 13. Scoops or carrierarms20 threadedly connected and looselyfitted upon the agitator shaft 12 and nipple 13 are adapt ed to travel around and about the screen15 and within the bowl 1.9. Fins 21 inwardly projected from the intermediate portions in thelengths of thescoops are adapted to lift and scoop up flour sifted through the screen into the bowl 19 back within the screenfor future sifting. As illustrated, the fins 21 are oppositely disposed upon the side edges of the scoops or carrier arms upon the semi-circular.

portions thereof extended in opposite directions from the shaft 12. It is generally known that flour is sifted as many as five times to make the flour light enough for bakingpure poses and which ordinarily requires that the flour be sifted within a large bowl and which is subsequently emptied into the sifter. And

it not infrequentlyhappens that the bowl is none other than a mixing bowl which-could be effectively employed for mixing the batter,-

The bowl is provided with depressed portions 22 within its sides adapted to receive the innermost end of a spring pressed finger or rod 23 which rigidly holds the bowl in an inverted position. The tension of the finger or pin 28 against the outer surface of'the bowl 19 will sustain the latter in any desired position axially of the shaft 12.

From the foregoing description and the particular figures mentioned, it is noted that two optional methods are oflered, namely, the

finger or pin 23' and the scoop or carrier arms 20 emplo ed to lift and redeposit the sifted flour wit in the bowl into the screen 15.

In Figures 4 and 5 of the drawings, I have illustrated a'modified form of my invention which embodies the essential characteristics of the preferred form of the invention disclosed in Figures 1 to 3, inclusive, but which in addition has provided means for operating the carrier or scoop arms independently of the agitator arms whereby all of the sifted flourmay be returned to the screen. before the sifting action is repeated.

The construction involved in the modification is in the nature of a sleeve member 24 rotatably mounted within a side wall of the housing 10 and receiving and j ournaling the adjacent portion of the agitator shaft 12. The scoop or carrier arms20 at their points of intersection adjacent the shaft 12 and sleeve 24 are apertured to fixedly receive the innermost end of said sleeve.

By omitting the handle 11 with reference to the preferred form of the invention in contradistinction to the modification, a handle member 25 vertically disposed upon the outer side of the housing 10 is employed.

It is to be especially noted that the housing may lie flush with and against a fiat surface 'while in use thereby overcoming the former difliculty of holding the housing in a certain position within a bowl.

The invention is susceptible of various changes in its form, proportions and minor details of construction, and the right is here in reserved to make such changes as properly fall within the scope of the appended claims.

Having described the invention, what 'is 1. A sifter comprising a housing open at both ends, a handle member carried thereby, a shaft member extended and j ournaled'within the handle member and having its opposite end journaled within an appropriate portion of the housing, a screen carried within the housing, agitator arms carried by and operable in conjunction with the shaft and within said screen, and a bowl carried upon,

the shaft being adapted to catch siftings from the screen and which when inverted being adapted to return the screenings to the screen I for further sifting.

2. A siftercomprising a housing open at both ends, a handle member carried thereby, a shaft member extended and j ournaled within the handle member and having its opposite end j ournaled within an appropriate portion of the housing, a screen carried within the housing, agitator arms carried by and operable in conjunction with the shaft and within said screen, a bowl carried upon the shaft being adapted to catch siftings from the screen and which when inverted being adapted to return the screenings to the screen for further sifting, and means carried by the housing adapted to retain the bowl in a desired position therein. 1

3. A sifting device comprising a housing open at the bottom and top, a handle member carried by and extended horizontally from the housing, a shaft extended and rotatably mounted within the handle having its opposite end j ournaled within an appropriate portion of the housing, a screen rigidly mounted within the housing, agitator'arms carried by and operable in conjunction with the shaft and within said screen, a bowl swingably mounted within the housing, a spring finger carried by the housing being adapted to retain the bowl in a desired-position, and scoop arms carried within the housing being adapted to lift and return the siftings from the bowl to the screen.

4. A sifting device comprising a housing open at the bottom and top, a handle member carried by and extended horizontally from the housing, a shaft extended and rotatably mounted within the handle having its opposite end journaled within an appropriate portion of the housing, a screen rigidly mounted within the housing, agitator 'arms 7 carried by and operable in conjunction with the shaft and within said screen,- a bowl swingably mounted within the housing, a-'

spring finger carried by the housing being adapted to retain the bowl in a desired position, scoop arms carried within the housing being adapted to lift and return the siftingsfrom the bowl to the screen, and fins in- Wardly projected from the scoop arms in oppositely disposed relation thereon being adapted to carry and redeposit the siftings within the bowl to the screen. v

In testimony whereof I aflix my signature.

RUTH WELCH,

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