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Aug. 27, 1946. ' D. s. FooTE - MIXING i 2,406,535 MACHINE 2 sheets-sheet `1‘ VFiled June 14, 1944 Q ‘n BY INVENToR oon/Am s mons-` ` Arron/ver: Aug. l27, 1946. l D. s. FOOTE MIXING MACHINE ' ¿406,535 ' lFiled June 14, 1944 ` 2 4sheets-_sheet 2 ÍNVEN TOR. DONA/_o „s Foorf Patented Aug. 27, 11946 ¿2,406,535 _ UNITED STATES PATENT OFFICE NIIXING MACHINE ` »Donald S. Foote, Kansas City, vMo.,y assignor to Remington Arms Company, Inc., Bridgeport, Conn., a corporation of Delaware f Application June 14, 1944,»SerialNo.`540,'21‘-6 4 Claims. (Cl. 259-72) , l 2 1 The -present invention -relates 'to a mixing ap Fig. 3 is a .sectional plan view, taken along the line 3--3 of Fig. 1, the receptacle being removed. Fig. 4 is a vertical sectional view, taken `along the line ïl-Ll of Fig. 1, and showing the mixing elements in a relatively moved position from that illustrated in Fig. '1, the long dot-and-dash lines paratus, particularly for mixing .several ingredi ents, and wherein such ingredients, usually .in pulverulent form, .are of different specific grav ities and in widely different proportions. While the apparatus may be used for the mixing of -var ious substances, it is especially adapted for the and the short dot-and-dash llines respectively Y showing further relatively moved positions, , mixing of an explosive mixture suchas an ammu nition primerrmixture. Such primer mixtures us ually include a burning substance, a binding sub stance, and a highly explosive fulminating sub stance, the latter usually vbeing a Verysmall per centage of the entire mixture. The ingredients arepreferably mixed in a wet state, and in this Figs. 5 to 8 are :diagrammatical views showing several successive positionsof `the mixing ele ments relative to the receptacle, the latter being shown Ain horizontal section. ~ . Similar ; reference characters vindicate corre case it is Vessential that the mass of ingredients be thoroughly blended by a kneading action. Be cause of the dangerous character of the material, it is the usual practice to mix the ingredients. in a suitably barricaded structure by remote con trol, the usual type of mechanical mixer compris 20 ing agitator or mixing elements movable in the mixing receptacle in direct contact with the con tents, a procedure involving considerable. danger sponding parts throughout the severalñgures of the drawings. Referring to the drawings, the mixing .appa- l ratus, according to the illustrated exemplary em bodiment of the invention, >comprises >a frame consisting of a raised platform base I0, a pair of vertical standards 'II-II, and a .horizontal top plate I2 mounted upon the upper ends of the standards. The top plate is provided .centrally from exposion, as well as inconvenience and haz with a circular opening I3 in which is engaged the mixing receptacle I4 in the form of an _im ard in removing the mixture and vcleaning the perforate ilexible bowl, lpreferably formed of rub apparatus. ber or thev like, and of substantially :concidal shape. At its upper wide `end vthe bowl Yis ¿pro mixing apparatus wherein the ingredients of the vided with a projecting rim .I5 `having embedded mixture are placed in an imperforate `flexible re-' in it a stiil‘ening ring I6, which provides a re ceptacle, and wherein external agitating elements . 30 silient flange, adapted to seat'upcn the upper yside YIt is an object of the ‘invention to provide a having reciprocal and rubbing movements coop erate with the receptacle to impart a kneading action to the contents to thoroughly mix and blend them. A further object is to provide -an apparatus wherein the mixing receptacle is removably mounted inthe apparatus, so that it may serve as the portable container for handling the completed of the table I2, as well as ameans for maintain ing the circular form of the bowl while it is being handled. The bowl is retained in the opening I3 by means of a rectangularclamping plate I1., provided centrally ywith a circular opening I8 in register with the opening I3, and hingedly mount ed on the‘ plate I2 by means of a hinge-connec i tion I9 at one edge. At its opposite edge the plate mixture as it is carried from the mixing appara is provided with slotted lugs ‘20 ’adapted vtolse tus to its point of use, it being proposed to provide 40 engaged by hingedly mounted clamping screws 2l, a number of interchangeable receptacles, so that provided with wing nuts «22 iwhich upon being as soon as one is removed to be used asa handling tightened securely clamp the 'rim I5 of the bowl container, another containing a new charge of between the table and the clamping plate. The ingredients may be placed within the apparatus. bowl hangs below the table I.2 where it is adapted With the above and other objects in View, an 45 to belexternally engaged by the'mixing elements, embodiment ofthe inventionk is shown in the ac presently to be more fully described. companying drawings, and this embodiment will In each of the standards I‘I there is provided a be >hereinafter more fully described with refer vertical slot ‘23 in which-are engaged the end arm ence thereto, and the invention -will be finally pointed out in the claims. In the drawings: ` portions of a vertically slidable _crosshead _24, 50 these arm portions being shouldered, vas -at‘-25, to i Fig, 1 is a front elevation of a mixing appa ratus, according to the illustrated exemplary em bodiment of the invention. Fig. 2’is an end elevation. engage at the inner sides of the standards yto re tainfthe crosshead against 4longitudinal displace ment. Centrally of the crosshead there is pro vided a shaft portion 26upon-which is rotatably 55 engaged a block >member 21 provided'at itsupper 2,406,535 4 , 3 position the vertically movable plunger 28 en Side with an upwardly projecting plunger element gages the lower end of the bowl, pressing it up 28. To one side of the block 21 there is secured a lever arm 29 projecting downwardly and for wardly therefrom and provided with a cam roller wardly to a slight extent so that the rearward - portion of the bowl extends downwardly’ behind 3B riding upon a cam 3| secured upon a horizon 5 the end of the plunger while the forward por tion extends upwardly in front of it. The rear tal cam shaft 32 journaled in the standards ||. wardly converging inclined faces 43 of the pusher ` The roller 33 is yieldably heldin engagement with elements 39 compress the sides of the bowl to an the cam' by a- spring 33 connected between the end increased extent toward the rear, so that it pro of the lever 29 and the base l5. This cam is de-` signed to impart swinging movement to the 10 .jects rearwardly to a slightly greater extent than plunger 28, coincidentally with raising and low- ~ . forwardly, and as shown diagrammatically in Fig. 5. The `crosshead 24 is moved upwardly by ering movement imparted to it by the vertical means of the eccentric drive elements 34, and at sliding movement of the crosshead. For this lat ter purpose eccentric drive elements are )providedr ` »Y the same time the camV 3| rotates to the point upon the cam shaft 32 outwardly of the standè l5 shown in Fig. 4 where the roller 36 is at the end of ’the concentric portion 3|a of the cam 3| and ’ 'g is aboutv to be engaged bythe projectingrise SIb j secured to the shaft and engaged by the ,circular Y ards I I, each consisting oían eccentric sheave 34 ' strap end 35 at the lower end of a connecting arm> 36, the upper ends of the connecting arms at eachY thereof. . As the .crosshead risessimultaneously with the' side being pivotally connected tothe ends of the 20 riding of the roller 33 over the concentric portion» _ of the cam a forward swinging movement is im-_ ' crosshead projecting through the slots 23. ' parted to the plunger 28, bringing it lfrom the slightly rearwardly inclined position shown inV The plunger 28 is disposed in the central ver tical plane of the bowl i9 in such arrangement that in its lowered position it engages the lower end of the bowl, slightly indenting it. Upon a 25 Fig. 2 to the forwardly inclined position shown in Figs..4 and 6. Simultaneously with the rais ing Vof the crosshead, the cams 5| are rotated to points where the slide rods 31 carrying the pusher elements 39 are moved inwardly, the right hand cam 5| being preferably arranged as shown in ad horizontal axis extending longitudinally through the lower portion of the bowl at a point inter mediate the lowered andraised positions of the plunger 28 there are provided at opposed sides of the bowl reciprocating slide rods 31, each mount 30 vance of the left hand cam, so that the right hand pusher element is moved inwardly in advance of ed in bearing bushings 38 provided in the stand the inward movement of the left hand pusher ele ards I|. Carried upon the inner end of each of ment, as shown in Fig. 6. v'The inward movement these slide rods is a vbowl engaging «pusher element 39, provided with a mortise projection 40 engaged of the right hand pusher element- is vcompleted gaging face 43, and is tilted downwardly to dispose , cam 3| the plunger 28 is swung rearwardly to the in a transverse slot 4| in the end of the rod and 35 substantially at the same time that the plunger 28 reaches its upper'forwardly swung position.` -' ' secured thereto by a pin 42. Each of the pusher As the roller 33 rides upon the rise 3|b ofthe elements is provided with a rectangular bowl en position shown in Fig. 7, and by the longdot-and-- the bowl engaging face in a downwardly and rearwardly inclined direction. ' The bowl engaging 40 dash lines _in Fig. 4. ' During this movement the right `hand pusher element remains in its in-V wardly moved position and at the same time the face is also inclined inwardly toward the rear. This arrangement of the bowl engaging faces pro left hand pusher element completes its inward movement, with the resultV that the ingredients vides a downwardly and rearwardly inclined con verging passage for cooperation withthe vertical ly moving and swinging plunger 28, as will here 45 in the bowl are given a differential kneading ac tion at each side of the plunger 28 through its passage between the primarily inwardly moved inafter more fully appear. Horizontal reciprocation is imparted to the 4rods 31 by means of rock levers 44-44 pivotally right Ahand pusher element, and the secondarily inwardly moved left hand pusher element, their spective standards ||---| |, these brackets having 50 opposed converging faces causing the mixture to be gradually squeezed-with increasing force as clearance openings 46 therein through which the the plunger swings rearwardly, and this squeez ends of the crosshead 24 are adapted to move dur ing action being started at'the right hand side ing its vertical reciprocation. The upper end of slightly in advance of the left hand side. each of the rock levers 44 is engaged in a slot As the roller 35 leaves the rise 3| Vand rides over 41 in the end of Veach of the rods 31, and is piv 55 the steep decline surface 3|“, the crosshead 24 is otally connected thereto by means of a pin 48 en quickly moved downwardly to a point slightly gaged in a slot 49 inthe end of the lever. Upon above its lowermost position, causing the plunger the lower end of each rock lever there is provided 28 to swing forwardly to the position shown in a cam engaging roller 58, riding upon a cam 5| secured upon the end of the cam shaft 32, y»the 60 Fig. 8, and by the short dot-and-dash lines in Fig. 4, this action taking placev while the pusher roller being held in engagement with the cam elements move outwardly, the right hand pusher surface by a spring 52 connected between th element moving outwardly slightly in advance of rock lever and the bracket 45. *i mounted upon brackets 45-45 secured to the re the left hand pusher element, so that there is a Rotation is imparted to the cam shaft by means of a worm'gear 53 and pinion 54, the latter being 65 differential squeezing action at each side of the plunger 28 during this movement. Thereupon the carried by a shaft 55 mounted in brackets 56 se cured to the inner side of one of the standards I|. This shaft is driven by any suitable means, preferably a motor located at a remote point.` The operation is as follows: - Y roller 36 rides upwardly upon the sharp rise-por tion 3|-d of the cam y3|'to its starting position, this action taking place during the terminal por 70 tion of the downward movement of the cross In the lowered position of the crosshead 24, as illustrated in Figs. 41 and 2, the horizontally re ciprocating pusher elements 39 are in their out wardly moved positions with their face surfaces 43 engaged at opposed sides of the bowl, _In this 75 head and causing the plunger 28 to swing from the position shown by the. short dot-and-dash lines in Fig. 4 tothe slightly rearwardly inclined starting position shown in Fig. 2. Y Y >Í The form of the invention illustrated in the 2,406,535 5 3. In a mixing apparatus, a support, a ñexible drawings and described herein is typical and il lustrative only, and it is evident that the inven tion is capable of embodiments in other forms, all falling within the scope of the appended claims, which are to be broadly construed. What is claimed is: Vmixing receptacle supported therein and disposed in a substantially vertical hanging position, a vertically reciprocating cross‘nead, a plunger ele ment pivotally carried thereby for swinging movement coincidentally with its vertical re ciprocating movement and arranged to engage the lower end of said receptacle exteriorly, and mixing receptacle suppcrted'therein, a recipro cating mixing element arranged to engage the end ‘ a pair of horizontally reciprocating pusher ele of said receptacle exteriorly, reciprocating mix 10 ments arranged to engage opposed sides of said receptacle exteriorly, said pusher elements hav ing elements arranged to engage opposed sides of ing convergent and inclined receptacle engaging said receptacle exteriorly, a reciprocating cross faces providing a contracting and expanding head on which said end engaging mixing element transverse passage through which said plunger is pivotally mounted for swinging movement, and cam means for imparting swinging movement to 15 element is adapted to have reciprocal and swing ing movement, and mcansfor imparting recipro said end engaging mixing elementI coinciden cating movement to said pusher elements one in tally with its reciprocating movement, said side advance of the’other, whereby the contents of engaging mixing elements providing a contract said receptacle are squeezed between the hori ing and expanding transverse passage through l. In a mixing apparatus, a support, a ñexible aontally pressed sides and the vertically Ypressed which said end engaging mixing element is 20 end of said receptaclewith a kneading action. adapted to have reciprocal and swinging move 4, in a mixing apparatus, a support, a ñexible ment, and whereby the contents of said recepta mixing receptacle supported therein and dis cle are squeezed between the pressed sides and , the pressed end of said receptacle with a knead ing action. 2. In a mixing apparatus, a support, a flexible posed in a substantially vertical hanging posi 25 tion, a main shaft, a vertically reciprocable cross head, cam means on said shaftl to reciprocate said crosshead, a plunger element pivotally carried by said crosshead for swinging movement coinciden posed in a substantially vertical hanging position, tally with its vertical reciprocating movement a vertically reciprocating plunger element ar 30 and arranged to engage the lower end of said re ranged to engage the lower end of said recepta ceptacle exteriorly, a cam on said main shaft for cle exteriorly, horizontally reciprocating pusher swinging said plunger, a pair of horizontally re elements arranged to engage opposedsides of said ciprocating pusher elements arranged to engage mixing receptacle supported therein and dis receptacle exteriorly, a vertically 'reciprocating opposed sides of said receptacle exteriorly, said crosshead on which said plunger element is piv 35 pusher elements having convergent and inclined otally mounted for swinging movement about a receptacle engaging faces providing a contracthorizontal axis, and cam means for imparting ing and expanding transverse passage through swinging movement to said plunger element coin cidentally with its verticalv reciprocating move ment,l said pusher elements providing a con tracting and expanding transverse passage through which said plunger element is adapted to have reciprocal and swinging movement, and whereby the contents of said receptacle are which said plunger is adapted to have reciprocal and swinging movement, and cam means mounted 40 on opposite ends of said shaft for imparting re ciprocating movement to said pusher elements one in advance of the other, whereby thel contents of said receptacle are squeezed between the hori zontally pressed sides and the vertically pressed squeezed between the horizontally pressed sides 45 end of said receptacle with a kneading action. and the vertically pressed end of said receptacle with a kneading action. DONALD S. FOOTE.