US2543238A - Mechanical movement - Google Patents

Description

Feb. 27 11951 J. E. EVERARD 2543 238 MECHANICAL MOVEMENT Filed March 16, 1945 3 Sheets-Sheet l flg-&.

W mvzm 35 Joseph E Evevawd 46 W a Feb. 27, 1951 J. E. EVERARD 2,543,238

MECHANICAL MOVEMENT Filed March 16, 1945 s Sheets-Sheet 2 IHVENTOR Joseph E. E ver'czrd Feb 2?, 11951 J. E. EVERARD 2,543,238

MECHANICAL MOVEMENT Filed March 16, 1945 3 Sheets-Sheet 3 INVENTQFL Joseph, Efiverowai Patented Feb. 27, 1 951 UNITED STATES PATENT OFFICE MECHANICAL MOVEMENT Joseph Emile Everard, Cochrane, Ontario, Canada Application March 16, 1945, Serial No. 583,093

1 Claim. 1

This invention relates to liquid feeding apparatus that is particularly adapwd to the feeding of liquid reagent to milling circuits in ore processmg.

The invention is illustrated by its reference to ore processing. Milk of lime is used widely in milling circuits as a protective agent for the'cy anide. It must be maintained in given percentage in the cyanide solution since if the lime content drops too low or the alkalinity disappears entirely the cyanide is destroyed by the action of the ores. This is a condition which has had to have careful supervision and the introduction of such a reagent usually has been accomplished previously by using a mixing box adding water and lime thereto, agitating the mixture from time to time, causing it to pass through a screen and draining a quantity therefrom from time to time during the working day to introduce at least a sufficient quantity i of the mixture to the processing solution to avoid deterioration of the cyanide. This procedure is usually performed manually and at intervals sometimes of considerable and not always uniform duration and results in the percentage of reagent in the circuit times.

This procedure has obvious disadvantages, both in respect to variation in percentage of reagent in the circuit during the day and the necessity of following thi procedure at intervals throughout the twenty-four hour period.

The present invention avoids these disadvantages and provides a means for minute control of the f eding of reagent in milling circuits or for the feeding of liquid in other fields in a similar manner.

It is an object of the present invention to provide liquid feeding apparatus automatically operated which automatically will feed a predetermined amount of liquid at regular intervals of such short and uniform duration as to give the effect of a continuous feed.

A further object of the invention is to provide an apparatus of this kind by which liquid may be automatically fed through a plurality of independent conduits in a regular and controlled manner.

A further object of the invention is to provide an apparatus of this kind which may be adapted to feed liquid from a tank to a plurality of separate conduits wherein the amount discharged into each conduit may be selectively varied and the time of introduction of the liquid may be varied as between any of said conduits.

A still further object of the invention is to provide a liquid feeding apparatus of this kind which varying greatly at different is particularly simple in construction and which may be installed and maintained with a minimum of difiiculty.

A still further object of the invention is to provide apparatus of this kind including indicating means operating in conjunction with the feeding means for indicating the amount of liquid which is periodically fed from the tank.

With these and other objects in view, the invention is for use with a tank having liquid feed outlet or outlets. The invention relates to a device for periodically operating a valve for one of the outlets from a normal position comprising,

aframe, a valve actuating arm pivotally mounted on said frame, said arm having a telescoping section control means for telescoping said telescoping section, a cam, and drive means for the cam. The free end of the telescoping section is formed for engagement with the cam. A dial and pointer for the dial, and a link and gear system connect-- ing the pointer and the telescoping section of the arm are also provided.

The invention will be clearly understood after reference to the following detailed specification read in conjunction with the drawings.

In the drawings:

Fig. l is a partly sectional view of a feeding tank showing the liquid feeding apparatus mounted in conjunction therewith. said apparatus being shown mainly in side elevation.

Fig. la is a fragmentary detail of part of the regulating arm shown in Fig. 1 and illustrating the journal connected thereto for moving the arm on the cross shaft.

- Fig. 2 is a top plan view of a tank having a battery of feeding devices according to the present invention mounted in conjunction therewith including a common means of operation for'each ofthem.

Fig. 3 is a side elevation of Fig. 2.

Fig. 4 is an end elevation of Fig. 2. Fig. 5 is an enlarged top plan view of the regulating arm and actuating parts of the liquid feeding apparatus.

Fig. 6 is a fragmentary detail showing the lever and quadrant for operating the indicating means.

Fig. 7 is a partly sectional detail taken substan tially along the line 'l---'! of Fig. 1. v

Fig. 8 is a detail elevation of part of the supporting" structurefor the indicating means and,

Fig. 9 is a sectional detail of an alternative form of valve structure.

Referring to the drawings, ill indicates a tank containing a liquid designed to be fed in a controlled manner such as a reagent to be fed in ore milling circuits. This tank is provided with a valve outlet i l which in the present illustration is controlled by a valve l2 actuated by an actuating rod 3. The valve structure includes a body M, which may be of tubular form, surrounding the seat of the valve outlet i I and housing a suitable coil spring which is pressed against the valve l2 by means of a suitable screw threaded cap [6 mounted on the body l5. The body 14 is orificed or formed with open portions to permit the liquid in tank to discharge through the valve outlet H when the valve i2 is lifted from its valve seat.

Mounted on the tank l9 by any suitable means.

such as the transverse support in structure ll, is a valve actuating arm l8 whichispivoted' on the transverse shaft l9 intermediate itsends. Pivoting is efi'ected by means of a suitable bracket carried on the arm and designed to swingaboutthe shaft l9 which is carried by suitable brackets 2:l.mounted onthezsupporting structure F.

The arm. [8; islongitudinally recessed to form the guideway 22 which, as shown in: Fig. '7, is undercut to: retain. and permit. sliding operation of theslide 23.. An upwardly projecting plate or bracket is rigidly fastened to the slide 23, plate 24 being provided, with. av screw threaded orifice through which the-screw threaded portion 25 ofthe adjusting-memberZfi projects. The adjusting member; 26; is rotatably carried in; the projecting; bracket 2]; which is rigidly mounted on the, arm; l8. Thus by turning; the wheel 28 ofthemember-2fi the-latter freely rotates in the bracket 21 and theconsequent rotation.- of the screw threaded p0rtion125 will cause the late-M o to move longitudinally of the-arm. in a forward or rearward-direction.as .thecase may be.

The. slide 23 projects beyond the end of the arm: I 9 and is rigidly fastenedto-afitting 2:; which carries the roller 30.. This latter is disposed in thepathof. a rotatable cam- 3.! carried on the shaft 32. Thus it will be apparentthat contact of the camwith the roller 30 in thedownward swing ofthe cam will. tilt the arm ill-about its pivotal shaft l9.. Moreover by adjusting thev adjusting member 26 so as to project-the fitting 29 beyond theend of the arm; to a-greater degree, the roller30.will be positioned closer. to the cam 3.l.. Consequently. in its downward swing. thecam 3| will engage theroller for a greater. degree of time. Thereforethe arm. H2 will be. caused to swing downwardly. to a; greater degree. and its operation will extend, over. a. greater. period. of time.

The, downward depression of the, arm (8 will, whenitswings aboutits. Divotalishaft l9,.1iiitv the oppositev end of the. arm, and, by reason of the connectingrod l3, whichis connected to.this.op.- posite end of arm I8 by means of the universal joint connectionjii andballandsocket connection 34, will cause aliftingoi thev valve IZthus to. open the valve. outlet. IJ'. Edrthermorahaving, regard to,.the. adjustment of; the fitting 29 towards or away from the cam 3l, by, thejlow adjusting vwheel 28, the valve. [2 may be removed from its seatover a greater or. lesser period of time thus to vary the amountof liquiddischarged from the tank Hlthrough thavalve opening l.l. Thev valve, l2 is then returnedgtoits, seat by the spring Hiwhenthe. cam.3l disengages. from the roller. 31!.

The amount of liquid periodically discharged from the tank l0. may be set on a suitable scale 3.5. which is.providedwiththe-pointer needle 36 carried onthe shaft. 3]. This latter shaft is. as

particularly shown in Fig. 7, freely journalled in the frame members 38 and 39 and carries the spur gear 40. This is designed to mesh with the quadrant 4| (Fig. 6) which, by means of the arm 42, is adjustably mounted on the lever 33, the latter being pivotally mounted as at 4 2 from its lower end on the general supporting bracket 45 (Fig. 7) carried by the supporting structure. An actuating rod 65 is fastened as shown in Fig. 7 to the plate 2 3' and extends upwardly substantially parallel to the lever 33. This is link-connected by the link connection '2'? with lever ea as shown in Fig. 1 the link being adjustably connectedwith lever $3 and the actuating rod 56 by means of the series of holes 15 provided in each. Thus; when the adjusting member 25 is rotated to-move the. fitting. 29 towards or away from the cam 3|, the consequent movement of the plate Kiln-operating the slide 23 will likewise move the actuating rod The: movement of this latter rod is, imparted; by the link is! to the lever 43 which is. thus caused to swing about its pivot The swinging quadrant H, which rotates the spur gear 4%, will cause the needle shaft to rotate, likewiserotating the needle 36 to indic n the scale. or dial 35. the adjustment which has been effected to increase or decrease the quantity of liquid discharged. Therefore by simpl adjusting member 25: by'flow wheel 28,. according to the desired volume 0. liquid it is desired to discharge from the tank 5% periodically, this selected uniform amount may be discharged for the purposes required.

Thecam shaft 32 is operated by the pulley 49 beltconnectedto. the pulley Ell which is operated from the reduction unit 5i. The latter in turn isoperated through the shaft 52 whi h is providedwith a drive pulley .73 connected to the motor drive pulley 56 carried by the motor 55. Moreover theshaft 52 carries the worm designed to. mesh with the worm wheel on the vertical shaft 53, the latter carrying a suitable agitator 59 which extends within the tank 10. Consequently as the liquid is discharged from the tank I0 periodically in the automatic manner described it is also automatically stirred to maintain constituents of the mixture in proper suspension'wherethis is necessary. For this reason and due to the construction and method of operation. of the valve, the apparatus is particularly well suited to the feeding of liquids containing solid and even granular material in suspension.

The. valve-outlet H may discharge to any sultablev discharge nozzle or. pipe line such for instance as thenozzle 69 (Fig. 3) which di cho into the pipe Bl to be delivered at the approp point. Moreover as will be clearl noted from a consideration of Figs. 2 and the development isreadily adaptable to the control of a series of valves. which will discharg through the appropriate nozzles (Fig. l). into a corresponding number of pipe lines to be delivered to the appropriate destinations required. In this instance it will be apparent. that a valve-and control unit as described in detail above associated with each outlet and, as shown particularly in Fig. 2, these units are operated from the single cam shaft employing the appropriate number of cams ri signedto engage-the corresponding roller of each fitting 29. Finally it will be'apparent that the sequence of opening of each of the valves may be eifected as required, merely by setting the angle of the cams in the proper relative manner. Therefore by this simple apparatus the volume of liquid: discharged from. the. tank periodically through a discharge outlet or series of outlets can be readily controlled whereas in the case of a plurality of outlets, the sequence of discharge of each of the outlets may be selected.

Various valve constructions might readily be employed to suit requirements. A preferred construction of valve is illustrated in Figs. 1 and 8. The valve shown in Fig. 8 has characteristics similar to that shown in Fig. 1 but is slightly diff rent in construction. In this case the member [4 is replaced by the body structure 62 flanged as at 63 and preferably bolted to the base of the tank l0 over a suitable orifice in the latter. A screw threaded spud 64 fastens into the base of the member 52 and forms the valve seat upon which the valve 65 is normally seated by means of the compression spring 66 which is compressed by the cap fitting 67 suitably secured to the member 62.

The operation of the device will be clearly apparent from the foregoing. The liquid in tank 10 is kept at a constant level to give an invariable flow and as the cam shaft rotates at the selected speed the valve will be opened and closed for intermittent periods of time which may be readily calculated and d sclosed on the indicator according to the adjustment made. Therefore a constant periodic discharge of liquid is automatically provided for. Moreover in the case of discharging liquid from the tank 10 to various destinations through a plurality of pipe lines, not only is the periodic volume of the liquid discharged from each pipe line controlled but it may be varied as between various pipe lines as required and it may be discharged at varied times relative to one another of the discharge outlets,

In ore milling units the apparatus will, for example, assure a predetermined and unvarying lime content in the solutions with increase in cyanide strength thus making it possible to reduce the total daily amount of cyanide added to the system while maintaining uniform controlled condition of the solution. It will be obvious however that the invention has a substantially wide application. Since it will handle any solution, emulsion or suspension it is of course adaptable for periodic feeding of liquid in other fields and is capable, for instance, of practical application in the addition of any reagent in water works, chemical plants, etc.

While a preferred form of apparatus has been shown, this apparatus is, of course, capable of variation and yet retaining its generally simple construction. Due to its simplicity it can be installed and maintained with minimum of cost and efiort.

What I claim as my invention is:

In a device for periodically operating a valve from a normal position, a frame, a valve actuating arm pivotally mounted on said frame, said arm having a telescoping section, control means for telescoping said telescoping section, a cam, drive for said cam, the free end of said telescoping section being formed for engagement with said cam, a dial, a pointer for said dial, a link and gear system connecting said pointer and said telescoping section of said arm.

JOSEPH EMILE EVERARD.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 548,560 Kremelberg Oct. 22, 1895 552,092 Ayton Dec. 31, 1895 584.191 Chatham Oct. 8, 1901 999,321 Leach Aug. 1, 1911 1,633,044 Soubier June 21, 1923 1,642,904 Soubier Sept. 20, 1923 2,185,444 Kyler Jan. 2, 1940

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