Патент USA US2356420код для вставки
~ ‘Aug. 22,1944. - c; 'z. MONROE ~ _ " 2,356,420 > v LIQUID MEASURING AND DISPENSING ‘APPARATUS Filed ‘Aug. 3; 1942 2 Sheets-Sheet 1 Aug- 22, 1944v MONROE . 7 ~ LIQUID MEASURING AND DISPENSING APPARATUS Filed Aug. 3, 1942 2,356,420 2 Sheets-Sheet 2 Patented Aug. 22, 1944 2,356,420 ‘,1! UNITED? STATES PATENT ‘OFFICE 2,356,420 MEASURING AND DISPENSING APPARATUS Charles Z. Monroe, Detroit, Mich., a‘ssignor to The American Paper‘ Bottle Company, Toledo, Ohio, a corporation of Ohio Application August 3, 191212, Serial No. 7,453,414 5 Claims. ‘The present invention relates to apparatus for 222-387 ) at any time or,'alternativel_y, that the liquid will ?ow from the cylinder faster than the piston tends to expel it, an equally disadvantageous measuring and dispensing liquids, particularly agitated, liquids such as milk which tend to foam when result. ‘ Preferably, the discharge port of the In Patent No. 2,202,073, issued to Julius E. Wollenweber, there is disclosed and claimed a " liquid measuring and dispensing device primarily this port as well as expelled vhrough the port into a waiting container. designed and intended for use as one elementof avcomplete automatic liquid packaging apparatus by means of which paper containers in the form of collapsed blanksiare successively squared-out, Thevmeans for. and 49 coated, charged with‘milk or the like, closed, and sealed, with cylinder is formed in the cylinder bottom and the‘liquid is introduced into the cylinder through ' .to limit thespeed of operation of the machine 135 method of introducing liquid into the measuring chamber, however, may be varied, the invention not being limited in this respect, The invention contemplates other changes inthe details of con struction and arrangement of ‘the valve and pis ton operating mechanism, as will be hereinafter explained. . ‘ __ I - : One embodiment of the-invention is illustrated by way of example in the accompanying draw ings, in ‘which Y F ' Figure 1 is a top plan view of the mechanism r20 showing certain of he underlying parts in dotted lines; Figure 2 is a side elevation of the same; Figure 3 is a section on line 3-3 of Figure 1; and Figurer‘i is a diagram in which may be observed in a rather precise manner. The Wollenweber measuring and dispensing device disclosed in the patent previously referred 35 40 some relationship to the rate of flow of ?uid through said port. arrangement the size of the With the improved discharge port will and sealing machine The piston 18 is ‘close ?tting and its lower or liquid contacting face has a ‘frusto-conical portion 18’ and a circular central 50 portion I82, the piston face, when the piston is in its lowermost position, ?tting closely the wall of the frusto-conical lower end surface of the measuring cylinder so as to liquid which may have been completely .expel all previously within the . ~ 55 cylinder. A slide valve is generally indicated at 20 and, generallyspeaking, it is the'same in construct-ion is minimized, there being no possibility that lid‘uid will be discharged at. too high a velocity 60 2,356,420 the piston travels past its midpoint position IV its vvvelocity of movement decreases,.as indicated provided with a cylindrical port 2| which may be brought into register with the.,circular cylinder discharge P0131? 11!,’ and? en elenigatedx recess. 22 =by_,'the varyingudistances between the positions VI and the posi accessible from its upper face only, one end of which recess may be brought into register with 1 tions VI and VII, the same interval of time cylinder discharge port ll while its other end is' in open communication with duct 23v leading" rv‘eta v, ‘the positions v and being " required to advance the piston from any one _ ' > of these positions to the next position. After downwardly from a container or other sourc'eof» ‘ passing the midpoint position IV, the valve serves to reduce the effective area of the cylinder dis liquid under the desired static pressure. With the valve in the position shownin Figure 1 .the charge port VII’ in a manner exactly the reverse of that in whi h it served to increase the effective valve port is partially open and the piston is at > , area of this valve port during the initial move that point in its travel which is most remote from _ _ \ mentof the’ piston, as indicated in Figure 4. the discharge port II, and about *to descend. The mechanism for accomplishing this objec During the descent of the piston, the valve 20 tive is of great simplicity. It includes a com moves further to the right and, when the valve 15 mon horizontally disposed ‘drive shaft 40 which port 2| is in full register with-the cylinder-port ‘l I, it is also in full register-with two discharge , ‘conduits 24v and 25,- respectively, formed in valve supporting block 26, ports 24 ‘and- 25 downwardly may be rotated about a ?xed'axis at uniform ve locity by any suitable driving means, for instance an electric motor. Fixed on the shaft 40 is a cylindrical cam 4| having a cam track 42 within diverging and terminating in’ a common hori 20 which is a roller or cam follower 43. Cam fol zontal plane just above‘v a conveyor upon which lower 43 is rotatably supported upon a pin 44 pro aresupported a series of containers, one of which jecting upwardly from the end of an arm 45 is indicated at-C3 in Figures land 3 respectively. keyed or otherwise ?xed upon a vertical shaft 46 _ The conveyor comprises the container support rotatably supported in a vertical bearing formed ing rail 21 and container advancing members 28 in the laterally extending portion I4’ of the side "and 29 which, in this instance, are parallel chains frame member l4. At its upper end shaft 46 has provided with container engaging and pushing ‘elements28' ‘and 29', respectively. ~ The element ‘ 26 issecured in valve supporting position by leaf spring members 30 and 3| the terminalends of P‘ which are curved-as shown in‘Figures 2 and 3 ?xed thereon an arm 41 extending toward the valve 20, the free end of this arm being connected by means of a link 48 to a pin 49 set in the pro jecting portion 20' of the valve 20. The arrange: ment is such that, when the drive shaft 40 is ‘and extend'over and part way around the vcyl inder supporting rods l3. At its intermediate point each of the spring supports 30' and 3| is rotated‘ the slide valve 20 will be reciprocated to effect the charging and discharging of the cyl engaged by‘ the head of an adjustable screw one The piston operating means includes a. crank 50 the arms of which are ?xed upon the adjacent ends of the interrupted drive shaft 40, as seen of which is indicated at 33 and the other at 34, each of these screws being vertically disposed and inder. ' ~ havingthreaded engagement with an aperture in the underside of the valve supporting element most clearly in Figure 2, this crank supporting the lower end of a pitman 5| extending sub 40 '26 and each being provided with a lock nut, the stantially vertically upwardly. The pitman 5| lock nuts being indicated at 35 and ~36,»respec is telescopic, comprising the rod-like lower por tively. Screws 33 are so adjusted that the valve tion 5la and the tubular or sleeve-like upper supportingielemen't 26 will be resiliently urged portion MD, the upper end of rod 5la extending upwardly by'the' supporting spring members 30 into a cylindrical axial recess formed in sleeve and 31, to holdthe upper surface of the valve in 5Ib, the upper‘ end of rod 51a carrying a slide close engagement at all times with the upper 52' which engages the cylindrical inner surface horizontal face 31 of a slideway‘ formed in the en of the sleeve and'passing through a cylindrical larged lower end of the cylinder casting which is especially designed for the-reception of the valve. aperture in a, nut 53, the pitman parts 5la and 51b being maintained in axial alignment by the 50 1-In the operation of the piston and valve it is engagementv of the rod 5la with the nut 53 and desired that flow of liquid downwardly through the engagement of the annular slide 52 with the port H, valve port 2|, and “directional ports or inner surface of sleeve 5Ib. .Intermediate slide ducts 24 and 25 be as rapid‘and yet as free of 52 and nut 53 is a helical compression spring 54 turbulenceas possible. Means is therefore pro and intermediate slide 52 and the upper end of videdffor actuating the piston and valve in timed 55 the cylindrical recess in the sleeve is a second relationship so that, when the piston is at the top helical compression spring 55. An extension 5|c of vits stroke,'the cylinder being full of liquid, of the sleeve 51b carries a roller 56 which is and is about to initiate its downward movement, adapted to strike, when the pitman descends, the valve opening will‘be relatively small, the po the upper end or head of a stop bolt 51 having sition ‘of the piston at this‘ point being indicated 60 threaded relation with the cylindrical inner wall at I in the diagram of Figure 4 and a correspond of a split ferrule supported in a lateral extension ing valve opening being indicated at IaJ The 59 of a vertical bracket also mounted upon the piston actuating means is so designed that the supporting rods l3. The bolt 51 comprises a piston rather slowly gets under way and is travel limiting stop for the sleeve-like upper end 5!!) ling most rapidly when it reaches its midpoint, or 65 of the pitman and determines the maximum ex position IV in Figure .4, at which'poirlt the cyl tent of downward movement of this part. inder port II is fully open‘as indicated at IVa The upper end 5119 of the pitman is connected in this?gure. The vertical distance between po-' to ‘thepiston l8 by means which includes the sition I and position II in Figure 4 indicates the rocking lever GI and the link 62, lever 6| being extent of piston travel during a certain interval 70 pivotallyv mounted at an intermediate point upon of time, the distance between position'II and} a pin 63‘ which extends through an aperture in position III, and likewise the distance between po the link 60 and through two aligned apertures sition III and position IV in this ?gure also indi in the bifurcated upper end of the pedestal“). cating the extent of travel of the pistons during It will be observed that there are three pairs of 75. the succeeding and'equal intervals of time. After 2,356,420 aligned apertures in the bifurcated upper end of the pedestal 60, which are indicated at 60a, 60b and 600, and three corresponding apertures in the rocking lever 6|,\ indicated at Bla, Glb 3 2. A liquid dispensing apparatus for delivering ' a ‘precisely measured quantity of liquid such as milk, comprising in combination, a measuring and file, the constructiondescribed thus making possible the shifting of the fulcrum axis about which the lever 6| rocks as the pitman vertically reciprocates. The extent of sliding movement discharge of ?uid from the measuring chamber, a piston within and slidably engaging the wall of the piston may thus be varied so that the quantity of the liquid to be delivered may be 10 of said chamber, said piston being movable to changed from time to time. Fine adjustments in piston travel are obtained by vertically adjust ing the screw 51. In the operation of the mechanism, the slide valve is ?rst moved into a position such that the 15 chamber, and thereafter moving toward closed elongated duct 22 is in register with the cylinder position, reacting such position after the comple port H and the supply duct 23. The piston is tion of the discharging stroke of the piston. then in its lowermost position. The valve will 3. A liquid dispensing apparatus for delivering remain in this position while the piston rises and a precisely measured quantity of liquid such as the cylinder ?lls, mainly by reason of the pres milk, comprising in combination, a measuring sure of liquid from below. After the ?lling op chamber having a discharge port formed in the eration has been completed, the valve will be ?rst Wall thereof, a valve mounted for sliding move actuated to close the port II and to immediately ment across the port for controlling the rate of thereafter slightly open it, the effective port discharge of ?uid from the measuring chamber, opening being that indicated in position Ia of Figure 4 of the drawings. The piston then im 25 a piston within and slidably engaging the wall mediately begins its descent, increasing its speed of movement by reason of the action of the crank of said chamber, said piston being movable to ward and away from said port and being so formed as to expel the entire contents of the 50 until the piston reaches its midpoint, after chamber on its discharging stroke, and means which the crank action is such that the speed of piston movement decreases, the speed of rotation 30 for producing synchronized movements of the piston and valve during the discharging of said of the crank, of course, being uniform, but the chamber, the valve opening increasing as the action being such that its effective lever Iarm piston speed increases and decreasing as the pis varies from instant to instant as it rotates in well ton speed decreases. . known manner. The effective opening of the 35 discharge port I l is, therefore, varied from in 4. A liquid dispensing apparatus for delivering charging mechanism so constructed foaming of discharge of ?uid from the measuring chamber, a precisely measured quantity of liquid such as stant to instant as the speed of descent of the milk, comprising in combination, a measuring piston IS in its cylinder varies from instant to chamber having a discharge port formed in the instant during its travel. The arrangement is such that the milk will ?ow to the container 40} wall thereof, a valve mounted for sliding move ment across the port for controlling the rate of with the least amount of turbulence. With a a liquid such as milk is decreased to a minimum and the speed of actuation of an automatic mech a piston within and slidably engaging the wall of said chamber, said piston being movable to anism which includes the charging mechanism is 45 ward and away from said port and being so formed as to expel the entire contents of the not checked by reason of the foaming tendency chamber on its discharging stroke, and means of the liquid being handled. for producing synchronized movements of the Having thus described the invention, What is piston and valve during the discharging of said claimed as new and desired to be secured by Let ters Patent is: 50 chamber, the valve opening being roughly pro portional to the rate of delivery of the ?uid from 1. A liquid dispensing apparatus for delivering the chamber. a precisely measured quantity of liquid such as 5. A liquid dispensing apparatus for delivering milk, comprising in combination, a measuring a precisely measured quantity of liquid such as chamber having a discharge port formed in the wall thereof, a valve mounted for sliding move 55 milk, comprising in combination, a measuring chamber having a discharge port formed in the ment across the port for controlling the rate of wall thereof, a valve mounted for sliding move discharge of ?uid from the measuring chamber, ment across the port for controlling the rate of a piston within and slidably engaging the wall of said chamber, said piston being movable to discharge of ?uid from the measuring chamber, a piston within and slidably engaging the wall ward and away from said port and being so 60 of said chamber, said piston being movable to formed as to expel the entire contents of the ward and away from said port and being so chamber on its discharging stroke, and means formed as to expel the entire contents of the for producing synchronized movements of the chamber on its discharging stroke, and means piston and valve during the discharging of said for producing synchronized movements of the. chamber, said means effecting movement of the 65 piston and valve during the discharging of said piston at an increasing rate of speed from the chamber, the piston being operated by a crank beginning of its stroke until it reaches the mid so as to move on its discharging stroke ?rst ‘at point of its travel, and thereafter at a decreasing rate of speed, and the port being initially opened ‘ an increasing velocity and thereafter at a de part way by the valve prior to the initiation of 70 creasing velocity, and the valve opening increas ing in area as the piston speed increases and de the discharging stroke of the piston, and there after fully opened, the valve reaching fully open position at about the time that the piston is travelling at its highest velocity. creasing in area as the piston speed decreases. 7 CHARLES Z. MONROE.