US1331968A - Pulverizer - Google Patents

Description

c. J. TOMLINSO'N. I

PULVERIZER.

APPLICATION FILED DEC-22. I915- Patented Feb. 24,1920.

UNITED STATES PATENT OFFICE.

CLIEEORZD J'. TOMLINSON, OF WE S'J. ALLIS, WISCONSIN, ASSIGNOR TO ALLIS-CHALMEBS MANUFACTURING COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF DELAWARE.

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Patented Feb. 24,1920.

. Application flied December 22, 1915. Serial No. 68,932.

To all whom it may concern:

Be it known that I, CLIFFORD J. TOMLIN- SON, a citizen of the UnitedStates, residing at West Allis, in the county of Milwaukee and State of Wisconsin, have invented a certain new and useful Improvement in Pulverizers, of which the following is a specification.

This invention relates to improvements in the construction of impact pulverizers and especially to improvements in the construction of hammers or bails for such pulverizers.

An object of the invention is to provide a pulverizer hammer or bail which is simple in construction, efficient in operation, and

1 in which the portion which is subjected to excessive wear may be readily, removed and renewed. One of the more specific objects is to provide a simple and strong hammer or bail comprising a pair of spaced radial arms and a cross-bar detachably secured to corresponding ends of said arms. Another object is to provide simple and efficient means for detachably securingthe cross-bar to the.

arm ends. A further object is to provide a suspension device for the bail, which will also serve to lock the means for securing the bail arms to the cross-bar, in place.

The present invention is an improvement over the device disclosed in application Serial No. 790,366, filed Sept. 15, 1913, which application claims broadly some of the novel features shown herein.

A clear conception of an embodiment of the invention may'be had by referring to the .drawing accompanying and forming a part of this specification, in which like reference characters designate the same or similar parts in the various views.

Figure 1 is a transverse vertical section through a rotary impact pulverizer having the improved bails applied.

Fig. 2 isan enlarged, part sectional elevation of one of the hammers 0r bails, showing the same secured to a fragment of the suspension means.

Fig. 3 is an enlarged end elevation of one of the hammers or bails.

Fig. 4 is a transverse section through the cross-bar of one of the bails showing also an elevation of one of the arms, the section I being taken along the line IV-IV of Fig. 2.

The rotary impact pulverizer, see Fig, 1, comprises. 1n general a clrcular serles of rapidly revoluble radial hammers or bails suspended from a shaft 2, and a main casing 1. The casing 1 is provided with a feed inlet 7 through which the material to be pulverized is delivered into the path of the revolving bails. The upper portion of the casing 1 adjacent the path of the bails, is provided with liners 6 having involute impact surfaces so located that they and has a suspension member 4: secured.

thereto by means of a key 3 or other suitable fastening device. The suspension member 4 has end surfaces 18 forming abutments spaced apart longitudinally of the axis of rotation of the member 4. The hammers or bails are suspended from the mem ber 4 by means of pivot pins 5 which are locked against end displacement by any suitable means such as set screws 17, see Fig. 2.

Each of the hammers or bails comprises a pair of substantially radial arms 9. and a longitudinally recessed cross-bar 13. The inner extremities ofthe arms 9 are provided with-inner surface portions 19 which cooperate with the surfaces 18 of the suspension member 4, to prevent displacement of. the arms 9 toward each other. The cross-bar 13 is detachably secured to the outer enlarged, ends 11 of the arms 9, by means of projections 12 formed two on each arm 9 and extending transversely of the shaft 2. The rojections 1.2 form abutments facing the shaft 2, which engage substantially parallel abutments or projections 15 formed on'opposite sides of the longitudinal recess 14 of the cross-bar 13. The opposite ends of the cross-bar 13 are provided with abutments or walls 16 the inner surfaces of which form stops engageable with the outer surface portions 20 of the arms 9. The enlargements 11 at the ends of the arms 9 provide the requisite strength and increase to a maximum the surfaces of engagement between the elements.

In order to assemble a bail, the arms 9 are first secured to the crossbar 13 by inserting the headed ends 11 in the central portion of the recess 14 and sliding the arms 9 over until their outer surface portions 20 engage the end walls 16. After the arms 9 have'been thus positioned relatively to the cross-bar 13, their inner ends are arranged with the openings of the arms 9 in alinement with the adjacent opening in the suspension member 4 and with their inner surface portions 19 adjacent the suspension member end surfaces 18, after which the suspension pin 5 may be inserted and locked by means of the set screw 17.

The insertion of the pin '5 positively locks the bail elements together and prevents displacement of the headed ends 11 of the arms 9 from within the recess 14 of the cross-bar 13. It will be noted that the abutment surfaces 18 of the suspension member 4 positively prevent displacement of the arms 9 toward each other while the abutments or walls 16 of the cross-bar 13 positively prevent displacement of the arms 9 away from each other. By providing two oppositely disposed like projections 12 on each of the arms 9 and otherwise symmetrically forming these arms they are subjected only to forces acting radially of the shaft 2, thus avoiding bending strains on the arms such as might result from unsymmetrical formation of the same. The provision of the recess 14 and of a connecting means between the arms 9 and the cross-bar 13 lying entirely within the said recess, effectively prevents injury of the connecting means. The inwardly extending projections at the outer extremities of the arms 9 which overhan the suspension member 4:, form weights w ich when acted upon by centrifugal force prevent displacement of the outer extremities of the arms 9 away from the walls 16, thereby insuring maintenance of the connections between the arms 9 and the cross-bar 13. The bail elements may be readily formed either by casting or forging and require very little finishing.

It should be understood that it is not desired to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

It is claimed and desired to secure by Letters Patent,

1. In combination, a suspension member rotatable about an axis and having abutment surfaces spaced apart longitudinally of said axis, a pair of arms secured to said' member and radiating from said axis, each of said arms being symmetrical with reference to a central plane transverse to said axis and said arms having inner portions cooperable with said abutment surfaces to prevent displacement of said arms toward each other, and a bar secured to and connecting said arms at their extremities remote from said axis, said bar having inner rotatable about an axis and having abutment surfaces spaced apart longitudinally of said axis, a pair of arms secured to said member and radiating from said axis, said arms having inner portions cooperable with said abutment surfaces and said abutment surfaces constituting the sole means for preventing motion of translation of sald arms toward each other, and a bar secured to and connecting said arms at their extremities remote from said axis, said bar having inner walls spaced apart longitudinally of said axis and said arms having outer-side portions oooperable with said bar walls to prevent displacement of said arms away from each other.

3. In combination, a suspension member rotatable about an axis and having abutment surfaces spaced apart longitudinally of saidvaxis, a pair of arms secured to said member and radiating from said axis, said arms having inner side portions cooperable with said abutment surfaces to prevent displacement of said arms toward each other, and a bar secured to and connecting said arms at their extremities remote from said axis, said bar having inner walls spaced apart longitudinally of said axis and said arms having outer side portions cooperable with said bar walls, said bar abutments constituting the sole means for preventing motion of translation of said arms away from each other.

4. In combination, a suspension member rotatable about an axis and having abutment surfaces spaced apart longitudinally of said axis, a pair of arms secured to said member and radiating from said axis, said arms having inner side portions cooperable with said abutment surfaces to prevent displacement of said arms toward each other and said arms each having an outer side portion and a pair of transverse projections at its extremity remote from said axis, and a bar having transverse projections and inner walls spaced apart longitudinally of said axis, said arm projections being engageable with said bar projections to secure said bar to said arms and said outer side portions of said arms being cooperable with said spaced bar walls to prevent displacement of said arms away from each other;

5. In combination, a suspension member rotatable about an axis and having opposite surfaces spaced apart longitudinally of said placement of said arms toward each other and said arms each having an outer side surface and a pair of parallel transverse projections at its extremity remote from said axis, and a bar having parallel transverseprojections and inner surfaces spaced apart longitudinally of said axis, said arm projections being engageable with said bar projections to secure said bar to said arms and said outer side surfaces of said arms being cooperable with said spaced bar surfaces to prevent displacement of said arms away from each other.

6. In combination, a cross-bar having a recess, an arm formed for attachment to said cross-bar Within said recess, said arm having a pro ectlon extending from one slde of said arm, and means for operating said arm so that said projection aids in preventing releasing displacement of said arm along said recess.

7. In combination, a cross-bar having a longitudinal recess therein, a pair of arms spaced longitudinally of said bar and secured to said bar Within said recess, said arms having projections extending from said arms on adjacent sides thereof, and means for operating said arms so that said projections aid in preventing displacement of said arms along said recess.

In testimony whereof the signature of the inventor is aflixed hereto.

OLIF F 0RD J. TOMLINSON.

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