USRE2106E - Flour-sifter - Google Patents

Description

PATENT OEEICE.

HOWARD TILDEN, OF BOSTON, MASSACHUSETTS.

FLoUR-`s|FTEP..-

Specification forming part of Letters Patent No. 47,756, dated May 1G, 1865; Reissue No. 2,106, dated November 14, 1865.

,To all whom it may concern:

Be it known that I, HOWARD TILDEN, of Boston, Suffolk county, and State of Massachusetts, formerly of Philadelphia,in the State of Pennsylvania, have invented certain new and useful Improvements in Flour-Sitters; and I do hereb;1 declare that the following description and accompanying drawings are sufiieient to enable any person skilled in the art a rotating stirrer to agitate theour and force it through the sieve; also, in providing the rotary stirrer with iexible edges or scrapers adapted to press the Hour through the sieve of the sitter.

1 n the accompanying drawin gs, Figure lis an `elevation in perspective of my improved sitter.

Fig. 2 is a plan or top view. Fig. 3 represents the stirrer; Fig. 4, the concave sieve. Fig. 5 is a view ofthe bottom ofthe sifter.

In .the drawings, A is a cylindrical case with an enlarged base, G, to stand on, and a bar, O, across the top, which is perforated for the crank-shaft L ofthestirrer to turn in. The concave sieve B (shown in Fig. 4) is fastened in the case A a short distance below the top to receive and sift the flour. This sieve B is made of woven wire and is perforated iu the center for the shaft L topass through it, and the perforation is surrounded by a sma-ll circular piece of metal, which is fastened to the sieve. The stirrer to agitate the flour in the concave sieve consists of the crank-shaft L, passing through the two straight bars D D,

(which are fastened to it,) and the two curved bars or ribs K K, which are curved to suit the concavity of the sieve, and their ends are fastened to the bars or arms D D. The curved arms or bars K K are armed or provided 'with' flexible edges or Scrapers J JA, which work againstthe inside ofthe concave sieve as the stirrer is turned and force the flour through the sieve. The lower end of the crank-shaft L is stepped in a socket fastened to the bot` tom of the case A. There is an opening through the case A to let the flour into the spout F.

after it is sifted, which opening is closed by the slide H fitted to traverse between the cleats I I, fastened to the case A, as shown in the drawin gs.

By making the sieve hemispherical or concave I get a much larger area of sifting-surface in a case or frame ot' a given size.

To use this sifter the flour to be sifted is put in on the sieve and the crank turned to operate the stirrer and work the iiour through the sieve.

What I claim as my invention and improvement in Hour-sitters isk 1. A hemispherical or concave sieve provided with a case, frame, or other proper support, for the purpose set forth.

2. In combination with a concave sieve, a rotating stirrerfor a gitatin g the iiour and forcing it through the sieve. y

3. In combination with a concave sieve, a arotary stirrer armed or provided with flexible edges or Scrapers and adapted to press the flour through the sieve of the sil'ter.

HOWARD TILDEN.

Witnesses:

HOWARD P. TI-LDEN,

WM. H. WARNE.

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