US1606228A - Crusher - Google Patents

Description

Nov- 9, 1926. 1,606,228

A. M. HUNT GRUSHER Filed April 27, 1926 2 Sheets-Sheet 1 awvantoz Patented Nev. e, 1925.

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ANDREW IE. HUNT, OF BERKELEY, CALIFORNIA, ASSI GNOR T0 STANDARD STOKER COMPANY, INCORPORATED, A- CORPORATION OE DELAWARE.

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Application filed April 27, 1926. Serial No. 104,875.

In stoker s, of this character, it has been .he practice to employ a crusher plate mounted over the conveyor screw at the forward end of the coal bin, which plate is provided with rearwardly projecting teeth adapted to cooperate with the screw in crushing the large lumps of coal as they are fed forward a by the-screw. In the practical operation of devices of this character, the crusher plate,

which is mounted closeto the screw, forms' an abutment-or obstruction to the coal in its forward movement under the influence of the screw, with the resultv that some of thiscoal is turned or moved upwardly at the rear of the crushing plate. One object of the present inventionis to provide an improved means whereby the upward motion Of the coal, directly to the rear of the crushing plate, may be taken advantage of in causing a splitting or breaking up of the large pieces of coal, and for this purpose, I provide a plurality of downwardly extending teeth located above the conveyor screw and somewhat to the rear of "the crusher plate heretofore employed. which teeth will be engaged by the upwardly moving pieces of coal and such pieces be effectively reduced thereby. A further object of my invention is to provide an improved crushing means of the character described which is simple andgtrong in, construction, wherein the downwardly directed teeth are rigidly supported and at the'same time provision is madewhereby. in case of jamming beneath the downwardly extending teeth, access may readily be obtained to the jam so as to loosen the same and remove any foreign obstruction which may have been the cause of the jam. 'Other objects of my invention willappear from the following description taken in. contit1on24 and formed with a lower nection with the accompanying drawing, which shows two of the preferred embodiments of my invention, and wherein- Fig. 1 is a fragmentary longitudinal sec tion of the locomotive tender showing a portion of the coal bin, conveying mechanism and one form of my improved crushing means.

Fig. 2 is an enlarged transverse scrii taken on the line 2-2 of Fig. 1.

Fig. 3 is an enlarged top plan View of the conveyor trough looking downwardly at the crusher and conveyor screw.

Figs. 4 and 5 are views similar to Figs.

2 and 3 respectively,'but showing a modified i form of my improved crushing means, and

F 1g. 6 is a section taken on the line 6-6 of Fig. 4.

Referring to Fig. 1, 19 represents the frame of a locomotive tnderand 11 a coal receptacle or bin carried thereby. The bottom of the bin 11 is provided with a central longltudmal opening 12 through which coal is adapted to pass to the conveyor trough 13. "The floor'of the coal bin is inclined downwardly to the trough 13 at the sides and back thereof, so that the coal will move downwardly along the inclined floor into p0- sition to enter the trough 13. Removable cover sections-15 may he slid forward or moved from covering position to permit the entry of coal into the trough 13 as the supply becomes depleted. .Operating in the trough 13, and journaled at the ends of the trough in the manner shown is a section 20 of the conveyor screw 21. -'Ihe screw is adapted to be operated through a gear 22 located at the rear. end of the trough 13 from suitable source of power not shown. The conveyor, of which the rear portion only 1s shown in Fig. 1, extends. forwardly to the locomotive and comprises aplurality of sections which are flexibly Ijoinedto one another so as to permit relative movements between the locomotive and its tenderv without damaging the conveyor. The forward end of the trough 13 is formed by, a partltion or plate 24 having an opening 25 therethrough, which forms a restriction in the passage through which coal is movedby the conveyor screw. Mountedgonj the parr SQ i opening 26 which embraces the upper portion of the conveyor screw, is a crusher plate 30 which is provided with rearwardly extending spurs projections 35.

' Secured nea the forward ends of the upper edges of trough 13, in any suitable manner as by rivets 36, are crushing members 37, 38, which comprise base portions and .38, are, preferably, cast so as to fit the contour of the trough 13 and their forward ends are formed with flanges 50, which may, if dzsired, be secured to the partition or plate 2 In operation, coal which enters the trough 13 from the bin 11 is carried forward by rotation of the screw 20, and lumps of coal which pass beneath the projections .45, 46

and 47 meet the projections 35 on the plate. .30and are split or broken and are carried by the screw 20 out of the trough through the restricted section of the passage, formed by the opening 25. The pressing of the vmass of coal against the plate 30 by the action of the screw 20 has the effect of forcing the lum s of coal, which lie-somewhat to the time the bin is filled with coal.

serves to relieve pressure beneath the prothe rear 0 the plate 30, upwardly. The

. teeth 45, 46 and 47 are so located as to be engaged by.these upwardly movinglumps, with the result that. these lumps are split 'to the proper size. It will be noted that should jamming occur beneath the teeth, as by the presence of foreign obstruction in the mass of coal, a tool may readily be inserted from above so as to break up the jam or dislodge the obstruction, the projections and the plate 30 being so spaced as to permit ready access in the front part of the interior of trough. The upper portions of the projecting members 42 and 43, are, referably, approximately flat, so as to f drm a partial support for the coal lying above-them at jections which might tend to produce a jam and so pergmts a more eflicient crushing and convevmg action in thejtrough.

In the orm of my invention in Figs. 4'

to -6, the downwardly projecting teeth 50 and 51 are formed on amember 52 which extends partway or entirely across the to 1 of the trough. -Member 52 may be secured to the sides of the trough at'the top by rivets. 53,, which extend through forwardl This projecting supporting feet 54 at the ends of the member 52, or in certain cases member 52 be formed integral with the plate 30. In either case, the ember 52 is spaced some distance to the r ar of the plate 30 so as to position the teeth 50 and 51 for proper' engagement with the coal, and also so as to permit a tool to be inserted betweenthe plate 30 and member 52 to loosen a jam or dislodge any obstructing material beneath the member 52.

I claim:-

1. In a stoker, a structure formed with a passage having a restricted section at one point, a conveyor screw operating in said passage to force coal through said section, and crushing means comprising projecting members extending inwardly from opposite sidesof said passage, said projecting members' being formed with downwardly extending teeth spaced from said screw and to the rear of said section, said teeth being adapted to split coal which is moved upward at the rear of said section by the thrust from the screw against the restriction.

2. In a stoker, a structure formed with a passage having a restricted section at one point, a conveyor screw operating in said passage to force coal through said section and crushing means comprising rearwardly extending coal engaging projections around the upper portion of said opening and downwardly projecting teeth spaced above said screw and to the rear of said projections, said teeth being adapted to sp it coal which is moved upward at the rear of said section by the thrust from'the screw against the restriction.

3. In a stoker, a structure formed with a passage having a restricted section at one point, a conveyor screw operating in said passage to force coal through saidsection and crushin section, and formed with rearwardly extending coal-engag'ng projections, andsaid crushmg means a so-compr1s1ng pro ecting members extending inwardly. from opposite sides of said passage, said projecting members being formed with downwardly extend- 7 ing teeth spaced above said screwand to the rear of said projections.

4. In a, device of the class described, a conveyor comprising'a trough, a receptacle adaptedto discharge downwardly into sa d trough, a conveyor'screw operating 1n. said trough, a crusher plate at the forward end of said trough above said screw and a crushing member. comprising a base portion secured to the. upper part of one side of said trou hand extending rearwardly from said crus er plate, said'base portion being pro means comprising a crusher .plate poslti ned above said screw, at said vided "with inwardly, laterally extending.v

projecting members, and said. projecting members being provided with downwardly extending teeth spaced above said conveyor screw.

5. In a device of the class described, a conveyor comprising a trough, a receptacle adapted to discharge downwardly into said trough, a conveyor screw operating in said trough, a crusher plate at the forward end of said trough above said screw and crushing members comprising base portions secured to opposite sides of said trough and extending rearwardly from said crusher plate, said base portions being provided with inwardly, laterally extending projecting members, and said projecting members being provided with downwardly extending teeth spaced above said conveyor screw. 6. In a device of the class described, a

conveyor comprising a trough, a receptacle adapted to discharge downwardly into said trough, a conveyor screw operating in said trough, a crusher plate at the forward end of said trough above said screw and crushing members comprising base portions se-' cured to opposite sides of said trough and extending rearwardly from said crusher greater distance from said plate being shorter than the'projecting members locate-d nearer said plate.

ANDREW M. HUNT.

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