Jonathan Mills Manuf'g Co. v. Whitehurst

56 F. 589, 1893 U.S. App. LEXIS 2698
CourtU.S. Circuit Court for the District of Southern Ohio
DecidedJuly 6, 1893
DocketNo. 632
StatusPublished
Cited by1 cases

This text of 56 F. 589 (Jonathan Mills Manuf'g Co. v. Whitehurst) is published on Counsel Stack Legal Research, covering U.S. Circuit Court for the District of Southern Ohio primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Jonathan Mills Manuf'g Co. v. Whitehurst, 56 F. 589, 1893 U.S. App. LEXIS 2698 (circtsdoh 1893).

Opinion

SAGE, District Judge.

The patent involved in this cause was granted November 7, 1882, to Jonathan Mills, for certain improvements in machines for dressing or bolting flour. The specification covers more than six pages of the letters issued from the [591]*591patent office. There are 14 claims, of winch the 1st, 2d, 3d, and 6th are averred to have been infringed, by ihe defendants. The patent Is, in terms, for a “centrifugal bolt.” The claims referred to are as follows:

-<(t) In a horizontal centrifugal holt, the combination of an outer shell; a reel; revolving, longitudinal, continuously arranged tlicr blades; and a central drum having a close or continuous peripheral surface, — together arranged, and operating substantially us described, and for the purposes set for ih.
"('!) In a horizontal centrifugal bolt the combination with the outer shell and reel ol a flier having a number of longitudinal troughs or recesses in its circumferential surface, said troughs being closed at their bottom, and embraced laterally by longitudinal, spirally-directed flier blades, whereby the material falling into said recesses is prevented from falling- to the bottom of the reel, substantially as described, and for the purposes set forth.
•‘(o) 3u a horizontal centrifugal bolt, the combination wiih the outer shell, and with the reel, of a flier consisting of a peripherally closed drum próx-ima ting in diameter that of the reel, and provided with longitudinal, spirally-directed blades, applied to the circumferential surface thereof, substantially as described, and for the purposes set forih.”
“({>) In a horizontal centrifugal bolt, the combination of an outer stationary shell, and inner rota ling- bolting reel, and a central drum having a close or continuous peripheral surface, said drum being- provided with longitudinal blades on its peripheral surface, arranged to operate together as a continuous blade, or series of continuous blades, and having a rotary moiion in the same direction with, but at a. higher speed than, the reel, whereby material being- bolted is prevented from overloading- Ihe bottom of 1he reel, substantially as described.”

A “bolt,” iu flour milling, as it was known until a few years prior to the device set forth in rite patent sued upon, was a cylindrical, hexagonal, or prismatic hollow -structore, mounted upon a revolving shaft, and consisting of a skeleton frame over which was stretched boiling cloth, of the degree of Jineness required for the particular work to be done. The bolting cloth was generally in pieces or sections, closely lifted to each other, and of different fineness, — the closer woven or finer at the head, and the coarser at the lower part or tail, of ¡he bolt. The material was fed in at the head, which was set somewhat higher than the tail, so that by the rotation of the bolt it was, little by little, conveyed to the tail. The fine portion of the material would be sifted out or bolted, and the coarser retained until finally discharged at the tail. By the constant revolution óf the bolt the sifting process was greatly facilitated, and the larger meshes in the bol ting cloth, as the material approached ihe lower end of the bolt, allowed the coarser particles of flour to pass through, while the bran and offal were retained. It was found that the operation of this boll was not complete. It did not entirely separate the iiour from the bran, but would “tail off” good stock. The speed with which the material introduced into the upper end of the bolt would pass through to the lower end was such that a. considerable portion of the flour, would be carried off through the lower end, without having been subjected to the proper sifting tuition. To remedy this defect; the bolts were lengthened to 12, and afterwards to 20, feet. Even (hen they were of limited capacity, and of imperfect yield, for tin; reason that the work of sifting- was done in a small part, only, [592]*592of tlie circumference of file bolt. The cylindrical bolt was first in order of time. Then the hexagonal, or sometimes the prismatic, was introduced. But, aside from the defects already stated, they were all objectionable, because of the space they occupied, and of the large amount of bolting silk required, and its cost. Then was introduced the centrifugal bolt, a slowly revolving, bolting-sillc cylinder, located within an outer inclosure, as all the bolts were, and containing a series of revolving beaters, consisting of flat wooden blades supported by two or more spiders or wheels located in the cylinder, and near its ends. These beaters, called also '‘fliers” and “beater blades,” were caused to revolve at the rate of from 200 to 400 revolutions per minute, within the slowly-revolving silk cylinder. The action of this bolt was altogether different from anything that preceded it. As the material passed from the head, where it was introduced, to the tail of the reel or bolt, it was subjected to a continuous beating action, which imparted to it a centrifugal motion and direction, forcing it against the bolting cloth at all portions of the circumference, and thus largely increasing the capacity of the bolt. As a consequence the bolt was shortened to about 8 or 10 feet. The advantages were that the bolt occupied less space; that its capacity was increased, and the soft, flake-like material was broken up by the beating action, and the flour dusted or blown off from the bran, and a larger yield obtained. The disadvantages were the greater wear of the bolting cloth, which had to be frequently replaced, and the severe scouring and beating action of the coarse middlings, which forced bran specks and other impurities through the interstices. For ■these reasons the centrifugal bolt was generally used for the purpose of producing a finish, and the cylindrical or hexagonal for making the best quality of floui\ There is testimony that the action of the beater blades had a tendency to make a quantity of fine flour dust, which, not having tlxe qualities of rising, was detrimental to the baking qualities of the flour. It also produced an uneven flour, a part of it being forced through the silk in coarse granules, and á part reduced to a very fine powder, whereby its market value was lessened.

The next improvement was made by Jonathan Mills, to whom, on the 7th of November, 1882, the patent in .suit, No. 267,098, was issued. It consists of an outer case; a rotating reel or bolting-cloth cylinder; an inner drum or imperforate cylinder of external diameter, say about six inches less than the interior of the bolting reel frame, and provided with blades or elevating devices which may be made of angle iron, and so attached to the drum as to hold the projecting flange somewhat inclined backward, with reference to the direction of motion, from a radial line of the drum. These blades are preferably about an inch and three-quarters in width, and from six to eighteen inches long. The apertures through which they are secured to the drum are in slot form, so that they may be set at any desired inclination from a direct longitudinal line. Their number may be as desired, and they may be set in longitudinal series or out of line, as preferred; but in either case, [593]*593in order to obtain die full rapacity of the bolt, each line of blades must be continuous, and of the full length of the drum. Ordinarily, according to die specification, they should be set spirally, — somewhat like the twist of die idle in a gun.

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Bluebook (online)
56 F. 589, 1893 U.S. App. LEXIS 2698, Counsel Stack Legal Research, https://law.counselstack.com/opinion/jonathan-mills-manufg-co-v-whitehurst-circtsdoh-1893.