US294236A

US294236A - Roller-mill

Info

Publication number: US294236A
Authority: US
Publication date: 1884-02-26
Anticipated expiration: 1901-02-26

Description

(No Modl.) 1 2 Sheets-Sheet 1.

N. W. HOLT.

ROLLER MILL.

Patented Feb. 26. 1884'.

(No Model.) 2 Sheets- Sheet 2.

' y N. W. HOLT. Y

ROLLERMILL. 10.294.235 Patenwdeb. 26, 1884.

Y Y, v. A v five/M02:

N, PETERS. Pimm-Langman WMI-...genna Nirn *FATFS ArnNr Finca..`

NOAH w. HOLr, OF BUFFALO, NEW YORK.

ROLLER-NULL.

SPECIFICATION forming part of Letters Patent No. 294,236, dated February 26, 1884.

.Application filed September' l1, 1883. (No model.)

To all whom it may concern.:

of New York, have invented new and usefulv Improvements in Roller-Mills, of which the following is a specification.

This invention relates to an improvement in that class of roller-mills which are employed for the reduction of grain in the manufacture of flour and similar products.

My invention has the obj eet to provide means for keeping the rollers clean and cool, and for carrying off the iloating dust from the rollermill casing.

My invention consists, to these ends, of the improvements which will be hereinafter fully set forth, and pointed ont Vin-the claims.

In the accompanying drawings, consisting of two sheets, Figure 1 represents a vertical section of a roller-mill provided with my improvements. Fig. 2 represents a horizontal section in line x az, Fig. 1. Fig. 3 is a crosssection of one of the air-pipes on an enlarged scale. Fig. @represents a partly sectional top plan view of the machine, the section being taken in line y y, Fig. 1.

Like letters of reference refer to like parts in the several figures.

A A represent two pairs of grinding or reducing rollers arranged in the'same casing, B, in a well-known manner.

B B represent the two feed-hoppers, arranged, respectively, over the two pairs yof grinding-rollers. l

C C represent the feed-rollers, and D D the feed-slides, all of ordinary and well-known construction. 4

E represents an airchamber arranged between the side walls of the roller-casing above and between the inner rollers, A', below the feed-hoppers, and between the feed-rollers.

e represents the outer walls of the'airchamber E, extending upwardly from the inner rollers, A, and provided on the rearside .of each feed-roller C with an air passage or opening, f, which is provided with an adjustable gate or valve, F.

g represents the inner inclined walls of the feed-hoppervs, extending upwardly from the upper sides of the feed-rollers to a central partition, g. The openings f are arranged near the lower ends ofthe inclined walls g, and in rear of the latter. The gates F are arranged in the air-chamber E, and Vpivoted in the side walls of the rollenoasing, and provided on the outside of the casing with handles 7L, by which they can be adjusted.

I represents an air spout or pipe communicating with the chamber E, and forming an exit-passage through which the air escapes from the chamber E. lo. represents the bottom plate of the chamber E, located between the inner rollers, A, and provided with an opening or air-passage, k.

K represents an adjustable gate or valve arranged above the opening 7c', to regulate the flow of air through the same.

M M2 represent air-passages'arranged, respectively, against the outer sides of the rollers A A', runninglengthwise of the same, and M are air passages or tubes, whereby each passage M is connected with the passage M2, so that the air will pass from the passage M through the passage M into the passage M2. The passages M M2 are constructed in the forni of troughs or tubes having a longitudinal opening on one side, the open sides of the troughs or tubes nesting against the rollers, as clearly shown in Figs. 1 and 3. The edges of the troughs may be provided with packing-strips m of leather or other iiexible material, resting against the rollers, as shown in Fig. 3. The passages M are fitted against the outer rollers, A, and the passages M2 against the inner rollers, A. Those portions of these passages which extend beyond the rollers as well as the passages M are constructed` in the form of tight tubes. The passages M2 are arranged in the air-chamber E, and their ends farthestremoved from the pipes M are provided with apertures a, which open into said air-chamber.

O represents a blast-fan having its blastf spouto connected with the air-passages M M in such manner th at air-currents are driven by said fan through the air-passages M M M2 into the chamber E in the direction of the arrows in Fig. 2. The air-currents owing through 'the passages M M2 pass along the surfaces of the rollers A A, and remove therefrom the dust and light fuzzy material adhering to the same, and at the same time keep the rollers cool. The action of the air-currents is confined IOO to the portions of the roller-surfaces which are l covered by the air-passages, and the air-currents do not in any way interfere with or affect the grinding action of the rolls or the passage of the material to and from the rolls.

P represents a suction-fan, having its eye connected with the air-trunk I, so as to exhaust the air from the chamber E. The exhaustion of the chamber E causes air-currents to enter the chamber E from the interior of the casing B through the openings f and k. The aircurrents entering through the openings f pass through the streams of grain escaping from the feed-rollers and past the rear sides of the feed-rollers, and remove the dust contained in the grain or adhering to the feed-rollers. By this means the dust removed from the feedroller is not again brought in contact with the material escaping from the feed-roller. The lower portion of the casing B has openings admitting'the external air in the usual manner. A portion of the air entering the casing B passes through the opening k into the chamber E, and carries with it any dust or light particles iioating in the casing B below the rollers A A. The exhaustion of the chamber E will also cause air-currents through the passages M M/ M2 in the proper direction in the absence of a blast-fan, O, and the latter may be dispensed with, if desired. The blastspout p of the fan P discharges the dust-laden air into a suitable dust-room or dust-collector.

Vhen a number of roll er-mills are employed, a single fan may be connected with all of the roller-mills by suitable branch spouts.

Y The mechanism for cooling and cleaning the rollers may bey 'used independently of the mechanism for cleaning the feed-rollers, and instead of connecting the two air-passages of each pair of rollers, so that the air-current passes successively along both rollers, each airconduit may be directly connected with the fan or other device whereby the air-current is created; but I prefer the construction shown and described, as being very simple, compact, and effective. Y

l am aware that rollers have been provided with air-pipes whereby air-currents are directed against the surface of the rollers, and this I do not claim.

I claim as my inventionl. The combination, with a revolving roller, of an air passage or conduit fitted with its open side lengthwise against the roller, and niechanism whereby an air-currentis caused to low p through said conduit or passage along the portion of the roller-face which is covered by said conduit or passage, substantially as set forth.

2. The combination, with t-wo revolving rollers, of air passages or conduits fitted with their open sides lengthwise against the rollers, a conduit whereby said passages are connected, and mechanism whereby an air-current is caused to `fiow successively along both rollers through both of said conduits or passages, substantially as set forth.

3. The combination, with rollers A A, of air-conduits arranged along the rollers, a chamber, E, into which vthe several air-conduits open, and an exit-spout, I, through which the air is discharged from the chamber E, substantially as set forth.

4t.. The combination, with the reducing rollers A A', feed-rollers C, and inclosingcasing B, of an air-chamber, E, having openings f and 7c', substantially as set forth.

'5. The combination, with the reducingrollers A A, feed-rollers C, and inclosingcasing B, of an air-chamber, E, having opeir A ings f, and air-conduits M, opening into the chamber E, substantially .as set forth.

Vitness my hand this 13th day of August, 1883.

NOAH XV. HOLT.

Vitnesses:

CARL F. GEYER, JNO. J. BONNER.