US1466638A - Mixing apparatus - Google Patents

Description

Au 28, 1923. 1,466.638 M F. A. BROWNE MIXING APPARATUS Filed July 18. 1921 2 Sh -Sheet 1 FIG. I 131535; 12

1 m 41 A 5g: 4g INVENTOR;

firm/f flfimwne,

BY [p r- A TTORN Y6.

WITNESSES:

Aug. 28, 1923. 1,466.638

- F. A. BROWNE MIXING APPARATUS Filed July 18 1921 '2 Sheets-Sheet 2 FIGf-l BY p r a? flaming.

Patented Aug. 2%, N23.

UNWEE FRANK A. EROWNE, OF WAYNE, PENNSYLVANIA, ASSIGNOR TO THE BARBER ASPHALT COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPOFIATIQN @F WEST VIRGINIA.

MIXING APPARATUS.

Application filed Jul is, 1921. Serial no. esane.

To all whom it may concern:

Be it known that l, FRANK A. Browns,

a citizen of the United States, residing in Wayne, in the county of Delaware and State of Pennsylvania, have invented certain new and useful Improvements in Mixing Apparatus, whereof the following is a specification, reference being had to the accompalpying drawings. y invention relates to mixing apparatus, and is concerned with apparatus especially suitable for mixing asphaltic or bituminous paving compositions, such as crushed stone and fluxed asphalt, for example. I aim to make the apparatus simple, eflective, durable, and convenient in service, and to enable-it to be quickly and readily filled and emptied. How these and other advantages can be obtained through my invention will appear from my description hereinafter of the best embodiment of the invention at present known to me.

In the drawings, Fig. I is a plan view of a mixer constructed in accordance with my invention.

Fig. H shows a longitudinal vertical section through the apparatus, taken as indicated by the line 11-11 in Fig. l.

Fig. III is aside elevation, certain parts being broken away in places, or omitted entirely, to reveal parts behind them.

Fig. TV shows a transverse section through the apparatus, taken as indicated by the line lV-IV in Fig. I.

The mixer shown in the drawings comprises an open-topped tank 10 into which the material to be mixed can be readily shovelled or dumped. In the tank 10 are a con 1e of rotary a 'tators 11, 12, shown as su stantially horizontal and parallel. These agitators 11, 12 are just alike, and each of them comprises a multiplicity of inclined mixing blade members 13 radiating at various angles from a square shaft 15 whose rounded ends extend out through the tank ends 16 and are mounted in bearings 17 on brackets 18 which are attached to the ends of the tank and its base. The shafts 15 are removable through vertical slots in the tank ends 16 which are normally closed by detachable cover plates 19 (Fig. TV). As shown, pairs of blade members 13 are set opposite one another and clamped end to end about each shaft 15 with their angles to the same size, on the left-hand outboard ends of the shafts 15. The agitator blades 13 on the two ends of each shaft 15 are oppositely inclined in such a way that when the shafts turn over toward one another the agitators tend to force the material being mixed from each end of the tank toward its center. Corresponding blades 13 on the two shafts 15 are 90 apart, so that they do not interfere with one another when the mixer is running-notwithstanding that the shafts are a: shorter distance apart than twice the length of the blades. The agitators 11, 12 maybe driven from a power shaft 22, through a disconnectible clutch 23 and a pinion 24 which meshes with a gear 25 on one outboard end of the rear shaft 15. As shown, the clutch 23 is operated by a lever 26 fulcrumed to a bracket 27 which is mounted on one of the longitudinal floor beams or girders 28 that support the tank 10 and the whole machine.

Referrin now, more especially to Figs. I andlV, it will be observed that the tank bottom is rounded at 30, 30, coaxially (or substantially so) with each of the agitators 11, 12. As shown, the ti s of the revolving blades 13 have just a air, safe working clearance with these rounded bilges 30, 30, so that no considerable amount of material can remain sticking to the tank walls undisturbed. -The curved bilges 30, 30 are lined with sheets 31 of wear-resistant material, and on the outside of said bilges are mounted arc-shaped heating. chambers 33 (Fig. IV) consisting of approximately. concaved superposed metal sheets (one dished as shown) secured together and riveted to the metal tank wall adjacent their edges. On occasion, steam heated water, or hot oil may be admitted and circulated in these chambers 33 to keep the contents of the tank su fiiciently soft or fluid during prolonged murlng.

In the bottom of the tank 10, between the downward-sloping curved bilges 30, 30, is a dump opening, here shown as centrally located and as extending from end to end of the tank. During the mixing operation, this dump opening is closed by means of movable covers 35 which are slidable lengthwise of the tank, in the direction of the agitator axes. As shown, the upper surfaces 35, 36 of the cover 35 are concaved upward coaxially with the agitators ll, 12, and meet or intersect in a central elevated line or ridge extending lengthwise of the tank 10. The covers 35, 35, are slidable lengthwise outward beneath the upright tank end 16, so as to render the full length of the dump opening available for automatically emptying the tank 10 completely and expeditiously as the agitators l1, l2, revolve. The covers 35 are slidable as above described directly in the dump opening itself, with their upper surfaces (formed by a protective sheet metal lining or wear plate 37 corresponding to the bilge linings 31 screwed fast to the covers proper) flush with the inner surfaces of the tank bilges. Curved Z bars 38 are secured to the outer sides of the tank ends 16 with the edges of their depending flanges just clearing the surfaces of the covers 35. They are readily adjusted to an accurate fit to take care of wear, etc., of the cover plate 37. The side edges or margins of the covers are rabbetted at 39, and underlie or underlap the corresponding edges of the dump opening in the tank bottom somewhat. The covers 35 are supported on rails 40 extending lengthwise of the tank beneath the edges of the dump opening, by means of interposed antifriction wheels or rollers 41 pivoted between metal strips 42 which are adapted to move in shallow grooves in the covers 35 and to overlap the edges of the rails 40. The rails 4:0 are secured by angle clips or brackets 43 to channel beams 44 extending lengthwise beneath the tank, and the u per corners onedges 45 of the margins o the covers 35 make a close sliding fit against these beams, so as to exclude dirt from the rollers 41 and the rails 40 as much as possible. The beams or girders 4A are secured at either end to depending portions 46 of the tank ends 16 (which latter rest on the floor beams 28), by means of angle brackets or clips 4:7.

For moving the covers 35 quickly and easily, there are provided double acting] fluid piston motors 50, whose cylinders are mounted on channel cross-bars 52 attached to the beams 28 by angle clips or brackets 53. The piston rods 54; of these motors are connected to lugs or ribs 55 depending from the covers 35, and braced therefrom by transverse and longitudinal-webs 56. 57 Motive fluid (e. g., steam or compressed air) for operating the motors 50 is supplied through a system of piping 58 and exhausted through a rneaeae system of piping 59, under-control oi oscillatory valves 60 and 31, whose crank arms are connected to a common actuating rod 62.

By shifting the rod 62 so as to turn the valves 30 and 61 through an angle of 909 one way or the other, the two covers 35 can be simultaneously opened or closed very quickly and easily. When they are both open, the revolving blades will teed or sweep the entire contents of the tank 10 into the dump opening in a very short time.

Water of condensation may be discharged from the cylinders of the motors 50 through relief cocks 33 whose crank arms are connected to a common actuating rod 64 operable through a rocker 65 by a rod 66.

Having thus described my invention, 1 claim 2 l. A mixer having substantially parallel rotary agitators, and comprising a tank with its bottom rounded to conform and in closely spaced relation to the peripheral path of movement of each of said agitators and having a dump opening between the downwardsloping bilges of said bottom, and a movable closure for said openin having upper surfaces concaved arcuate y to form circular continuations of the tank bottom surfaces and meeting in an elevated longitudinal ridge which intersects the peripheral path of rotation of both agitators.

2. A. mixer having substantially parallel rotary agitators, and com rising a tank with its bottom rounded coaxially with each of said agitators and a dump opening extending from end to end of said tank between the downward-sloping bilges of said bottom, and a pair of closures for said opening slidable lengthwise therein and in opposite directions to uncover the opening and havin upper surfacesconcaved coaxially with sai agitators and meetin in an elevated longitudinal ridge, and a uid pressure means for each closure to operate the same independ.

ently of the other closure.

3. A mixer having substantially parallel rotary agitators, and comprising a tank with its bottom rounded coaxially with each of said agitators and a dump opening extending from end to end of said tank between the downward-sloping bilges of said bottom, a pair of closures slidable endwise outward in opposite directions beneath the ends of the tank to allow it to be completely emptied throu h said opening.

4:. mixer having substantially parallel rotary agitators, and comprising a tank withits bottom rounded coaxially with each of said agitators and a dump openin between the downward-sloping bil es of said bottom, support rails extending engthwise ofsaid tank beneath the opposite edges of said openin a closure means for said openin slidab e lengthwise of said tank, and whee s supporting theclosure and running on said rails.

menses Wheels supporting said underlepping side edges of the closure end running on the rails,

6. A mixer comprising at pair of rotary agitators, u'tonlr having its bottom rounded to conform to the peripheral path of rotution of the agitators and hevin o dumping opening in its bottom well, n pen of closures forsaid opening, each having conoeved sides constituting arcuate continuetions of the tank bottom, said closures abuttin et the transverse medial line of the casing and opening in opposite directions, s cylinder and piston beneath each closure, end e connection between each closure and its correlated piston.

7. A mixer comprising a pair of rotary agitators, n tunk hsving its bottom end lower end walls rounded to conform to the periphersl peth of rotetion of the agitators, said tunlr having an o ening in its bottom well, a closure forsni opening slidsble endwise oil the tank and having conceved sides forming srcuate continuetions of the tank bottom surfaces, and joint forming pistes edjustebly fitted to the end wells of the tank for movenient tows-rd end away from the closure to effect at tight compensetin joint between the closure end tenlr end wel s.

8.. A miner comprising o tnnlr, the opposed Wells of which ere formed with opposed psirs of slots entering the edges of said Wells,

agitator shsits fitted in ssid tsnlr by passing the ends or the shorts through the slots, plates stilling sold slots end seated between the edges thereof subsequent to the insertion of the shetts, leterel extensions of the pistes bolted to said wells and bearings -for supporting sold shafts.

9. ln .s, miner, s pair of spaced beams, e mixing ten s supported upon and between said beams end herring u lower dumping opening, e pnir ct rolls, each supported upon one of seid bennis, e sliding closure for the tenlr opening, and wheels supporting closure and running on ssid rails.

w. A rniser comprising agitators end tenlr hsving s rounded bottom and s dumping opening formed therein, e ridged slid eble closure for the opening, it reinforcing costing contorining to the outer surface of the closure end secured thereto, rails, Wheels curried by said casting and running on said rells, e web formed with the costing, ti cylin der, and s piston end piston rod coopereting therewith, the letter he ring s connection to the Web.

In. testimony whereof, 'l heve hereunto till tlil

Images