US1938500A

US1938500A - Hammer mill

Info

Publication number: US1938500A
Application number: US638422A
Authority: US
Inventors: Charles B Schur
Original assignee: Individual
Current assignee: Individual
Priority date: 1932-10-18
Filing date: 1932-10-18
Publication date: 1933-12-05
Anticipated expiration: 1950-12-05

Description

C. B, SCHUR HAMMER MILL Dec. 5, 1933.

Filed Oct. 18. 1952 2 Sheets-Sheet 1 7. r M. u y 4 h w MJ M, Q m V ,a v. 0 5 -IIT M u 1 1 7 \.--./Q md Q w af/Nl\\\ Z QL Z d MIU* Z/ \F [au KM Nw au ad 3 7 .M /l .J L L M l caw O ,bo a Q be /0 O r n. i w/ T n Dec. 5, 1933. C B SCHUR 1,938,500

HAMMER MILL Filed Oct. 18. 1932 2 Sheets-Sheet 2 L A a n n i j mi Patented Dec. 5, 1933 HAMMER MILL Charles B. Schur, Minneapolis, Kans.

Application October 18, 1932. Serial No..638,422

11 Claims.

This invention relates to a pulverizing mill or machine of the hammer type designed primarily for pulverizing and reducing stock feed, but it is to be understood that a mill or machine, in accordance with this invention may be employed in any connection for which it may be found applicable, and the invention has for its object to provide, in a manner as hereinafter set forth, a mill or machine of the class referred to including means so constructed and arranged to increase the capacity of the mill or machine, the amount of roughage and to enable the grinding of damp or'tough feed.

A further object of the invention is to set up, in a manner as hereinafter set forth, a mill or machine of the hammer type whereby it will provide for the cutting of the feed before the latter reaches the hammers.

A further object of the invention ris to provide,

in a manner as hereinafter set forth, a mill or machine for the purpose referred to with a set of spaced, bodily movable hammer elements and with one of the outer elements of said set provided with a pair of oppositely disposed knives coacting'with a cutter bar for cutting the feed before action thereon by the hammers whereby provision is had for the grinding of damp or tough feed in a satisfactory manner.

Further objects of the invention are to provide, in a manner as hereinafter set forth, a mill or machinefor the purpose and advantages referred to which is simple in its construction and arrangement, strong, durable, compact, thoroughly efficient in its use, conveniently repaired whenoccasion requires, and comparatively inexpensive to manufacture. y

To the above ends essentially and to others which may hereinafter appear, the invention consists of such parts and such combination of parts which fall within the scope of the invention as claimed.

In the drawings:-

Figure 1 is a top plan view of a mill or machine in accordance with this invention and illustrated with the hood element tilted back at an angle of approximately forty-five degrees.

Figure 2 is a section on line 2 2 Figure 1 with the hood element in closed position.

Figure 3 is a section on line 3--3 Figure l with the hood element in closed position.

Figure 4 is a perspective view of that hammer element of the set to which the knives are coupled.

Figure 5 is a perspective view of the reinforcing member for the hammer element shown in Figure 4 and against which is to be secured thev knives.

Figure 6 is a perspective view of the form of knife employed. y

Figure 'i' is a like View of a spacer for the hammer elements.

Referring to the drawings, 1 denotes an open top and bottom housing of rectangular contour and which comprises

side walls

2, 3,

end walls

4, 5 and inwardly extending oppositely disposed

iianges

6, 7 at the upper ends of the

walls

4, 5 respectively. The housing 1 provides a' chamber 8 for the reception of the treated feed stuff.` The wall 5 is cutout as at 9 to form an openingso that access can be had to chamber 8, and such opening is normally closed by a vertically movable gate 10 slidably connected against the outer face of wall 5. Secured to the inner faces of the

walls

2, 3 and to the inner ends of

flanges

6, 7 is a semi-circular screen 11 which depends into housing 1 and forms in connection withthe

flanges

6, 7 the top wall of chamber 8.

Journaled in the

walls

2, 3 and extended from*y wall 2 is a rotatable shaft 12 having that endv which is extended from wall 2 provided with a pulley 13 for connection to a driving means, not shown for shaft 12. Fixed to the latter and bodily movable therewith are two sets of hammerV elements. The elements of one set extend at right angles to the elements of the other set. The elements of one set are indicated at 14. One outer element of the other set is indicated at 15 and the other elements of such set are designated 16. Each of the hammer elements consists of an oblong bar split in alignment with its longitudinal median at each end, as at 18, 19. The element 15 is provided in proximity to one side edge between its transverse center and one end with a row of spaced openings 20 and in proximity to its other side edge between its transverse center and other end with a row of spaced openings 21. Each hammer element at the intersection of its transverse and longitudinal medians is formed with an opening 22.

The openings 22 in the hammer elements align with each other and extending through such aligning openings is the shaft 12, and mounted on the latter are spacing collars 23 arranged between

elements

14 and 16, a spacing collar 24 arranged between one of the outer elements 14 and wall 2 and a spacing collar 25 opposing Wall 3.

Coupled with the element 15 is a pair of op-y positely disposed

knives

26, 27 respectively of substantially frusto-triangular form. The knives are of like form and each consists of a body part 28 increasing in width from its inner to its outer end and having one lengthwise edge straight and squared and its other beveled to provide a cutting edge. The inner end 29 of body part 28 is concaved and its outer end 30 oppositely inclined. The body part 28 in proximity to its straight lengthwise edge is formed with a set of spaced openings 31.

Associated with the element 15 is a reinforcing member 32 therefor and which extends throughout one face of such element. The member 32 is in the form of a bar having a wide intermediate part 33 and a pair of reduced

outer parts

34, 35 offset with respect to each other. The

parts

34, 35 have rows 36, 37 respectively of spaced openings. 'I'he intermediate part 33 is formed with a central opening 38 which is to align with the opening 22 in element 15. The openings 36 are to align with the vopenings 20 and the openings 37 are to align with 'the openings 21. The openings 31 of knife 26 are to align with the openings 36 and the openings 31 of knife 27 are to align with openings 37. Holdfast devices 39 extend through aligning

openings

20, 36 and 31 for xedly securing element 15, member 32 and knife 26 together. Holdfast devices 40 extend through aligning openings 21, 37 and 3l for fixedly securing element l5, member 32 and knife 26 together. The

knives

26, 27 project laterally in opposite directions from the member 32. The collar 25 opposes the inner ends of the

knives

26, 27.

Extended laterally from the side wall 3 of housing 1 and positioned adjacent one side of shaft 12 is a platform or trough 41 for the stock which is fed to the-machine. Platform 41 has upstanding Aflanges 42 at its sides to retain the stock thereon. The side wall 3 has a lateral flange 43 upon which the inner end of platform 41 is mounted. Secured to flange 43 is an upstanding inverted yoke shaped guard 44 which extends across platform 41. Mounted upon the inner end of the latter is a cutter bar support 45 and positioned on the latter, as well as being adjustable relative thereto is a cutter bar 46 which extends inwardly from the inner edge of support 45 'a sufficient distance to coact with the

knives

26, 27. Holdfast means 47 extend through platform 41, support 45 and cutter bar 46, the latter being formed'with slots 48 to permit of its adjustment relative to support 45.Y The holdfast means 47 extend through slots 48.

`Hinged to one end of

walls

2, 3, as at 49 is a hood 50 for housing 1 and which has a supporting extension 51 therefor when it is swung completely olf the housing. One side of hood 50 is to guide the stock to the latter.

cutout as'at 52 to form a clearance for the guard when 'the hood is seated upon the housing, and such side is formed with a pair of outwardly directed parallel spaced arms 53 merging into an'upwardly inclined guide 54 which, when the hood'is in closure or covering position, extends transversely off the platform 41 and outwardly with respect to the support 45 and cutter bar 46 See Figure 3.

What I claim is:-

1. In a mill for the purpose set forth, oppositely disposed sets of spaced hammer elements bodily revolving together, a reinforcing member positioned lengthwise of one of the outer elements of one of the sets, oppositely disposed knives positioned against one side of said member, means for securing'said element, member and knives together, and a cutter bar co-related with Said knives,

2. In a mill of the hammer type, a housing, a hinged hood for the latter, a platform extended from the housing for the stock to be treated, a cutter bar support on the platform, a cutter bar mounted on the support and extended inwardly therefrom, revoluble hammer elements within the housing and one provided with stock cutting means coacting with said bar, a guard arranged over the cutter bar, and said hood having stock guiding means for extension across said platform outwardly with respect tothe cutterv bar when the hood is closed.

3. In a mill of the revolving hammer type, a bodily revoluble set of spaced parallel hammers, a reinforcing member connected to and bodily carried with one of the hammers of the set, oppositely disposed cutter means bodily carried with said member, and a stationary cutter bar alternately coacting with said cutting means.

4. In a mill for the purpose set forth, a bodily revoluble set of parallel spaced oblong hammer elements, a pair lof oppositely extending knives, means for securing said knives with and length'- wise of one of the outer elements of said set, said knives bodily carried by said element, an adjustable cutter bar coacting with said knives, a platform for the stock to be treated, a cutter bar support upon the 'inner end of the platform, a guard arranged over the cutter bar, and a stock guide on the platform leading upwardly to said cutter bar.

5. In a mill of that type including revolving hammer elements, the combination with one of the hammer elements thereof, said element being formed with two'rows of openings, of a reinforcing member positioned lengthwise of one side of said element and having openings registering with the openings of the latter, a pair of oppositely disposed knives positioned lengthwise of one side of said member and having openings registering 1.15. with the openings o f the latter, and holdfast means extending through the registering openings for xedly seeming said elements, member and knives together.

`6. In a'mill of that type including revolving hammer elements, the combination'with one of the hammer elements thereof, Ysaid element `being formed with two rows of openings, of a reinforcing member positioned lengthwise of one side of said element and having openings registering with the openings of the latter,"a pair of oppositely disposed knives positioned lengthwise of one'side of said memberand having openings registering with the openings of the latter, holdfast means extending through the registering openings for fixedly securing said elements, member and knives together, and a cutter bar arranged adjacent to said element and coactingr with said knives.

7. In a hammer mill, a revolving oblong hammer element provided at each end with a split disposed lengthwise thereof, -said element provided adjacent each of its lengthwise edges with a row of spaced openings, said rows offset with respect to each other, a reinforcing member having one side face positioned against one side face of said element and formed with rows of openings aligning with the openings of said element, a pair of oppositely disposed cutters having one side face thereof positioned against the other side face of said member and each formed with a row of openings registering with a row of openings in said member, and holdfast means extending through the registering openings for Xedly securing said element, member and cutters together.

8. In a hammer mill, a driven shaft, a bodily revoluble set of parallel spaced oblong hammer elements of like form, each provided at the intersection of the longitudinal and transverse medians thereof with an opening for securing the element to said shaft, each of said'elements having each of its ends slitted lengthwise thereof, and cutting means fixedly secured with one side of the outer element of the set and bodily carried therewith.

9. In a hammer mill, a driven shaft, a bodily revoluble set of parallel spaced oblong hammer elements of like form, each provided at the intersection of the longitudinal and transverse medians thereof with an opening for securing the element to said shaft, each of said elements having each of its endsslitted lengthwise thereof, a reinforcing member disposed lengthwise of the outer side face of the outer element of said set, cutting means disposed lengthwise of the outer side face of said member, and means for clamping the said outer element, member and cutting means together.

10. In a hammer mill, a casing provided with an intake, a bodily revoluble set of parallel spaced oblong hammer elements operating in the casing, means located to one side for said intake and connected to said elements for bodily revolving said set, cutting means xedly secured with the outer side face of the outer element of said set and bodily carried by such element, the

said outer element revolving in a path in close proximity to said intake, a platform for the stock to be treated extended into said intake, a cutter bar support mounted upon the inner end of the platform, a cutter bar connected to the support, extending into said casing andr coacting with said cutting means, and an inclined stock guide on the platform leading to said cutter bar support.

11. In a hammer mill, a casing provided with an intake, a bodily revoluble set of parallel spaced oblong hammer elements operating in the casing, means located to one side for said intake and connected to said elements for bodily revolving said set, cutting means xedly secured with the outer side face of the outer element of said set and bodily carried by such element, the said cuter element revolving in a path in close proximity to said intake, a platform for the stock to be treated extended into said intake, a cutter bar support mounted upon the inner end of the platform, a cutter bar connected to the support, extending into said casing and coacting with said cutting means, an inclined stock guide on rthe platform leading to said cutter bar support, and a stock guide arranged at the inner end of the platform and extending upwardly from the sides of the latter and over said cutter bar.

CHARLES B. SCHUR.