US1279874A - Flour-sifter. - Google Patents

Description

F. Y. JENSEN.

FLOUR SIFTER. APPLICATION FILED JUNE 8, 191a.-

Patented Sept. 24,1918.

lN-VENTOH WITNESSES ATTORNEY constructed to cause FREDERICK Y. JENSEN, OF EPHRAIM, UTAH.

FLOUR-SIFTER.

Specification of Letters Patent.

Patented se t. 24, 1915.

Application filed .Tune 8, 1918. Serial No. 238,938.

To all w/wm it may concern:

Be it known that I, FREDERICK Y. JENSEN, Ephraim, in the county of Sanpete and State of Utah, have invented certain. new and useful Improvements in Flour-Sifters, of which the following is a specification.

his invention relate to'flour sifters and has for its primary object to provide a sifter a combined oscillatory and vibratory movement to be imparted to the sifting element when the Sifter is in use.

One of the objects of the invention is to provide a flour sifter of this character which will operate to sift only the fine flour and which will retain any impure particles so that they will not be mixed with the sifted flour as sometimes happens with rotarytypes now commonly employed which tend to force impurities through the screen and mix them with the sifted flour.

The invention also aims to provide a structure that will tend to hold the flour against its tendency to move with the sifting screen when the latter is oscillated so that the combinedvibrating and'oscillating of the sifter will expedite the sifting of the flour.

A further object of the invention is to provide a device of this character which consists of comparatively few parts and is simple in construction but durable and Well adapted to withstand the rough usage to which devices of this character are ordinarily subjected.

For a full description of the invention and the advantages and merits thereof reference is to be had to the following description and accompanying drawings, in which Figure 1 is a verticalsection through a sifter constructed in accordance with my invention.

Fig. 2 is a detail section through a portion of the sifter.

The sifter l is of the same general body construction as is now commonly employed and isprovided with a handle 2 forfacilitating manipulation.

Approximately intermediate its length, the cylindrical wall of the body is provided with an annular head 3 forme by pressing inwardly as hown to advantage in Fig. l. The interior annular bead thus formed acts as a shelf to support a ring 4 which fits snugly in the body so that it will be prevented fromrotating when the sifter is in operation. This ring includes the annular a citizen of the United States, residing at flange which rests above the interior head 3 and the corrugated relatively Wide flange 5 depending from the ring 4. The flange 5 is crimped to form the corrugations thepurpose of which will be presently described. The curved rods 6 are bent into semi-circular formation and have their ends soldered or otherwise fixed to the corrugated flange 5. The ring 4, the flange 5, and the semi-circular rods 6 therefor, form a single removable unit that can be removed from the body of the sifter when desired. By snugly fitting the ring in the body, however, accidental or casual displacement of this removable element is prevented.

The screening element comprises an annular band 7 of a diameter less than the inner diameter of the body 1. The hemispherical screen 8 has itsmarginal edge fastened to the upper marginal edge of the band 7, the edge of the latter being bent upon itself to form gripping flanges for imparted to the band, the screen will be properly agitated. The annular rim 9 formed at the upper marginal edge of the band by thus providing the gripping flanges for the screen, engages beneath the interior annular bead 3 to limit the upward movement of the sifting element as will presently appear. The lower marginal edge of the annular band 7 is turned inwardly and this in turned portion is corrugated forming the fluted flange 10. This fluted flange rest upon fingers 11 formed by inturned ends of the wire rods 12 which are fixed to the lower end of the body and are preferably three in number,- two being'shown in Fig. 1 of the drawing. The fingers 11 have the fluted flange 10 resting thereon and consequently when the sifting element is oscillated, the" corrugations in'the flange 10 will cause the sifting element to rapidly -vibrate thereby.

In operation, the-flour will be placed in the sieve receptacle which is formed by the semi-spherical screen 8. The operator will. then impart an oscillatory movement to the actuating element thereby causing the sift= ing element to oscillate. The engagement of the fluted flange 10 with the fingers 11 will cause the screen to rapidly vibrate and the combined vibration and oscillation of the sifting element will rapidly sift the flour. The tendency of the flour Within the sieve, however, to move with the sieve as it is oscillated, is avoided by the corrugated flange and the semi-circular rods 6. The corrugations in the flange 5 engage the contents and assist the rods 6 .Which are disposed in close proximity to the inner surface of the sieve, to prevent movement of the flour'with. the sifting element and thereby facilitate the sifting operation.

The foregoing description and accompanying drawings have reference to what may be considered the preferred or approved form of my invention. I desire itto be understood that I may make such corrections Copies of this patent may be obtained for vibratory movement thereof when the annular band is oscillated.-

2. Aflour sifter of the character described, comprising a body having a sifting element mounted. therein, and an annular fluted flange formed on the sifting element, a plurality of inwardly projecting fingers carried by the body an dengageable with the fluted flange, and means to actuate the said sifting element.

3. A flour sifter comprising a body, arotatable band mounted Within the body, a screen element carried by the upper edge of the band, a fluted flange formed on the lower edge of the band and means formed on the body and engageable with the fluted flange to support the band and impart vi-' brations to the band as the fluted flange is moved over the said means.

4. A flour sifter comprising a body having arotatable sifting element mounted therein and including a substantially hemi-spherical screen, means for imparting an oscillatory movement to the screen, a corrugated flange depending partially into the screen, and semi-circular rods attached to the flange and slightly spaced from the interior surface of the screen for engaging the contents of the screen to prevent movement thereof while the said screen is oscillated.

In testimony whereof I aifiX my signature in presence of two Witnesses.

FREDERICK Y. JENSEN.

Witnesses:

LOUIS ANDERSON, P. S PETERSON.

five cents eaclnby oath-caning the Commiuioner of IBtQntI,

Washington, D. 0.

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