US74774A - Ambrose w - Google Patents

Description

@with 'tt @that @Hinar Letters Patent No. 74,774, dated February 25, 1868.

IMPROVEMENT IN PORTABLE GRI'NDVING-MILLS.'

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TO LiJ-"WHOMIT 'MAY CONGERN': t

Be it known that I, AMROSE W. STRAUB, of the city of Philadelphia, in the State of Pennsylvania, have invented a new and useful Improvement Vin the Portable WheatFlouring and Corn-Grinding Mill; and` I do hereby declare that the following is a full, clear, and exact description ofthe construction and operation ofthe same, reference being had tothe accompanying drawings, making a part ot' this specification, in which- Figure lis a 'perspective View,V and Figure 2 avertical'section of the said improved-mill; Y

Figure 3 being a sectional plane view of the under sigle of the lower or run-ningv stone, detached- Likev letters o t' reference indicating the same parte when in theditferent figures. 1 My improvement relates more especially tothe portable wheat-flouring and corn-grinding millof Mr.`Isaac Straub,l which is now used fextensiveiy in the western and southern States, the characteristic of which is, that the lower stone is the run'ner,-whilst the upper one'is stationary; and the .object of my improvement is to avoid the possibility ofthe mills getting out oi'tru.m,,a from thevterribly rough and careless handling to which they are subjected by ,steamboat and railroad transportation', v

. My invention consists in making the supporting-frame of the mill in a single piece of cast iron, substantially as hereinafter described and shown; and also in securing the detachable coping-ring, curb, and hopper.

stool together, firmly down u'p'on'the szlildV supporting-frame ofthe mill, by means of four nutted screw-bolts only, substantially-as hereinafter described'.

Referring to the drawings, A B is the supportingfframe of the mill, Ctheiixed or stationary stone, and

D the running stone, ii'xed upon its supporting spindle E; b the'dtachable 'coping-ring, d" the curb, F the` hopper-stool, and a5 a5 a5 a5 the four nutted screw-bolts. The frame A B is a hollow circular caseV of iron, cast in one piece, and consisting of an annularfbase, a', from which rise four upright portions, a, a, separated laterallyby four large open spaces, b 6', which aii'od free access to the interior, and ofan annular curbsupporter and guard, a", with four vertically-projectingposts, a* a4, of equal height above the curb-supporter af". A coping-"ring, Z1,'wit h'in which the upper stone, C, is xed permanently, rests upon the four posts, ai, and is secured accurately and firmly thereon by means of a bolt, a, whichis screwed vertically into the upper end oi' each' post, a4, so as to project upward far enough topass through the respective lug of the coping-ring b, and also throughl the foot oi the hopperstooland spindle-bearingF, to receive a screw-nut, whereby the parts 12' andfF areheld `downrmlyupon the top of the frame A B, asA shown in iigs. 1 and 2. Within the curb-supporter a/asheebmetal curb, d, isV fixed, the sides nf which reachup to the tops of the posts a4, (see fig. 2,) and within thiscurb the stone, D, rotates, without contact either with the curb or with the upper stone,

its spindle, E, extending down through a roomy hole in the centre ofthe bottom of d', and resting, in .tho usual bearing, in the adjustable supporting-beam G, below the driving-band pullcy e', which is fixed on the said spindle. Theun-der side of the running stone D has six (more or less)` fan-ribs, d, fixed radially thereto, at equal distances apart, and so as to reach from the spindle E to the periphery of the stone, and be carried around by the latter, without contact withjthe curb d.

Y It will be seen that, as the described different parts ofthe frame AB are cast togethcr in'one piece of iron, the said frame cannot be wrenched in any of its parts, in transportation, however roughly handled, and therefore the `rui'll wiii retain the exact train given to it at the manufactory--a matter ofvthe highestimportance, and, never before secured; and besides, in replacing the stones C D, after separating them 4from. the frame A B, for re-dressiug at any time afteiiusing, there will .not be any adjustment required to bring the faces ofthe stones exactly parallel to each other.

In'the operation'of thei'an-ribs d, during thc rapid rotaryvmo-tion of the running stone D, strong currents' of freshcool air will be steadily drawnbythem through the hole in the bottom ofthe crib cl', distributed'cver the under side and around theperiphery of the said stone, and discharged with the flour or mealat the outlet-Y spout, thus keeping the stone and flour coolanother result oi' great importancqand effected in the most simple manner.

Having thus fully described my improvement, what I claim as new therein of inyinvention, andl desire .to secure by Letters Patent, is confined to the following, viz:

I claim securing hrmlydewn 4together upon the frame A B, cast in one piece, as shown and described,fthe detachable curb d', copingring b, and hopper-stool F, by vmeans of four nuttedV screw-bolts, a" a? a ad, suhstantiall'y as andfor the purpose therein described.

A. W. STRAUB.

Witn esses l BENJ. Monson, WM. H.- Monrso'n.

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