US1492878A - Pulsator for milking machines - Google Patents

Description

vIgA-925878- May 4s ,1924.-

^ lJ. G.G. `EKLUNDl-I PULSATOR FR MILKING MACHINES Filed March 24. 1931i;4 2 sheets-sheer 1 May 6 1924. 1,492,878

J. G. G. EKLUNDH PULSATOR FOR MILKING MACHINES 2 Sheets-Sheet 2` the control of a Patented May 6, 1.92.4.

UNITED STATES PATENT oFFlcs.

JOHN G. G. EKLUNDH, 0F COLUMBUS, OHIO, ASSIGNOB TO THE UNIVERSAL MILKING MACHINE COMPANY, A CORPORATION OF OHIO.

PULSATOB FOB MILKING MACHINES.

applicati@ mea Maren 24.1919. serial 1ro. 284,553.

To all whom it may conce-rn:

Be it known that I, JOHN G. G. EKLUNDH, a subject of the King of Sweden, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Pulsators for Milking Machines, of which the followinfr is a specification.

ily invention relates to pulsator mechanism, of the type commonly employed in.

milking apparatus, and more particularly to valveoperating means therefor. It is to be understood however that the mechanism is not limited to use in conjunction with milking apparatus, and that the valve tumbler means may be applied to other mechanism than air operated pulsators.

The object of the invention is to simplify the structure as well as the means and mode of operation of such valve tumbler mechanism, whereby it will not only be chcapened in construction, but will be more eliicient in operation, positive in action, economical in manufacture, and unlikely to get out of repair.

A further object of the invention is to provide valve operating mechanism under rime mover which will be inoperative until such prime moverhas reached a predetermined point in its path of travel. 4

With the above primary and other incidental objects in view as will more fully ap-y pear in the specification, the invention consists of the features of construction, the

Y parts and combinations thereof, andthe mode of operation, or their equivalents, as'

hereinafter described and set.forth in the claims.

Referring to the drawings, Fig. 1 is a perspective view of a pulsator embodying the present invention. Fig. 2 is a top plan-l view thereof. Fig. 3 is a top plan view showing the relation of the parts at the .moment of reversal. Fig. 4 is a transverse sectional view. Fig; 5 is a to plan view of a modification. ifrs. 6 and are detail sectional views of the pulsator and control valve ports and valve connections. Fig. 8 is a detail view of a modification of the control valve and Fig. 9 is a further modi fication thereof.

Like parts are indicated by similar characters of reference throughout the` several views.

The form of pulsator illustrated in the drawings, comprlses a cylinder 1 mounted upon a suitable base or standard 2, the top of the cylinder is extended to form a deck or table upon which is mounted the alternating valve mechanism hereafter described.

lVithin the cylinder is a reciprocating pistion 3 which constitutes the prime mover by which the valve tumbler mechanism is actuated. The piston 3 is actuated to and fro by air pressure directed to'one end or the other of the cylinderb the ,alternation of the control valve. 'lllie preponderance of air pressure necessary tothe vmovement of the piston may be'eifectedj either by exhaustion of air from one end 'of'the cylinder and admissionof air at atmospheric pressure to the opposite end of the cylinder, or it may be effected by admission of air under increased pressure.

Air is supplied to and exhausted from the cylinder 1 through ducts 4 leading from the opposite ends of the cylinder to ports 5 located in the top or deck of the device. In the present instance these ports are located within a groove or recess 6, the bottom of which forms the seat for a reciprocatory t,

valve member 7. The ports 5 and related ducts 4 are alternately opened to atmosphere and connected with an exhaust port 8 located intermediate the movement of the valve mem er 7. The exhaust port 8 communicates with a suctionA duct or passage 9 leading downward to a main exhaust assage hereafter referred to. It will be un erstood that in the event the be supplied Arzvdevice is operated by com ressed air such This 'flange may be integral4 but to the deck or top 10 of the pulsator. The

The-valve 7 is provalve 7 reciprocating in its depressed seat'- side forming a'communicating passage be Y tween the ports 5 and 8. The main valve member 7 may be provided with a loosefitting recessed insert in which the'communicating recess or pocket is located as shown in Fig. 9. However such auxiliary iloating valve member forms no part of the present invention.

Pivoted upon a fixed stud 12 located in the top of the pulsator is an operating lever 13. This lever is oscillated to and fro in unison with the movement of the piston 3 by means of a stud or pin 14 carried by the piston, which pin extends throu h a slot 15 in the top of the cylinder an engagesin a slot 16 in the operating lever 13.

ivoted to the free end of the operating lever 13 isa valve actuator 17 the head of which is ofrllanceolate form and provided with a slot 18 in which engages a stud or pin 19 carried by the valve k7. The actuator 17 is free for oscillatory movement about its connection with the operating lever. It will be noted however that the ulcrum 20 of the valve actuator is shifted to and fro with the movement of the prime mover or piston. The lanceolate head of the actuator is so shaped that as it rides upon the flange 1,1 during the shifting movement of the fulcrum 20l the relation of the pin 19 with the flange 11 is unchanged and the valve remains at rest.

That is to sa `that the, arcuate faces of the lanceolate ead of the actuatorY are develo d with such relation to the center line o the actuator head thatthe actuator will shift longitudinally and simultaneously turn about the valve stud 19 while the fulshifting movement.

An actuating spring 21 connects the head of the actuator 17 and the fixed stud 12. This spring for convenience is to a pin 22 carried b the actuator head.

The spring-21 by its retractive tendency holds the actuator head firmly against the marginal liange 11 and so maintains the valve in operated position until the iston vapproaches the limit of its stroke. Xs the piston approaches the limit of its stroke the fulcrum 20 of the actuator is beyond a dead center position in relation with the spring connections -12 and 22, whereupon the vcontraction of the spring immediately yoscillates the actuator 17 into engagement with the opposite flange 11,

carrying with it the valve 7 to reverse pomtion. The reversal of the valve of course` eectslthe reversal of the piston and the cycle ofoperations is repeated In Fig.

3 the operating lever 13 is 'shown at the limit of its movement and the fulcrum 20 beyond the dead center with the spring exerting its pull upon the actuator whic is thereby turned .to the dotted line position. The operating lever 13 and actuator 17 may be compared to a toggle link construction which is reversed to and fr0 against the tension of the spring 21 connecting the extremities 'of such toggle link construction. "The toggle is operated to a straightened position'to place the sp under tension, and when the toggle is move slightly beyond its Astraightened position the spring completes the movement of the toggle.

The spring 21 not only serves to reverse the valve but it also holds the valve in its reversed osition until the moment of the succee ing operation of the valve.

The suction duct 9 leading to the port 8 is a branch conduit communicating with a main vacuum conduit 23 extending beneath the cylinder 1 and thence upward to a port 24. The port 24 is alternately connected with ports 25 at opposite sides thereof by the alternation of a pulsator valve 26 seated in a slot or recess 27 in the top or deck of the device. This valve is provided with a pocket or depression 28 in its under side,

l .which aords a communicating passage between the respective ports 24 and 25. The ports 25l communicate with hose or tubing connections 29 with which the teat cups or Y other intermittently operated elements are connected. To operate the pulsator valve 26 the operating lever 13 has been extended beyond its pivotal connection 12, and is provided with a slot 30 in which engages a stud or pin `31 carried by the valve 26. The valve 26 is thus shifted to and fro in unison with the movement of the piston.

The main vacuum conduit 23 is connected with a suitable suction device or with a suppl of air under rassure according to the e ected method o operation. The re versal of the pistonv is controlled by the movement of the valve 7 which governs the supply of air to the cylinder 1. The movement ofthe piston is transmitted,`not to the valve 7 but to the valve 26 by whi the influence of the actuating media is exerted alternately upon the operated devices connected to the respective connections '29.

It will be obvious that without in any way changing the construction or operation of the parts the spring 21 may be connected to the stud or pin 31 in lieu of the fixed stud 12. In such event the spring wouldbe given-a. greater tensioning movement and its direction of pull upon the actuator would be'changed in unison with the shift- .ing of the -fulcrum 20 thereby accentuat' vthe influence of the spring upon the valve AInFig.5thereisslxownamodilication los of the construction previously described, in which the actuator for the valve 7 is extended into an elongated lever 32 which is pivoted directly upon the stud or pin. 14 carried by the piston. The fulcrum of this actuator lever 32 upon the pin 14 is shifted to and fro beyond a dead center in relation with the spring connections 12 and 22 to reverse the valve in the same manner before described.

If so desired the valve 7 may be omitted and the actuator. whether in the form 17 or 32, may be utilized as the control valve by providing a recess or pocket33 in the under side of the actuator head as shown in Fig. 8. In such case the ports 5 and 8 would be located flush in the deck or top 1() instead of in the recess 6. To insure perfect contact of such valve element with its seat the head would preferably, though not necessarily, be provided with a loose insert 34 free for movement toward its seat independent of the actuator, this insert having therein the intercommunicating passage connecting the ports is held upon the seat by air pressure.-

From the above description it will be apparent that there is thus produced a device of the character described, possessing the particular features of advantage before enumerated as desirable, but which obviously is susceptible of modification in its form, proportion, detail construction and arrangement of parts without' departing from the principle involved, or sacrificing any of its advantages.

While the invention has been described in language more or less specific as to certain structural features, it is to beV understood that the invention is not limited to the specific details shown and described,- but that the means and construction herein disclosed comprise but one of several modes of putting the invention into eiect, and the invention is therefor claimed in any of its forms or modifications within the legitimate and valid scope of the appended claims.

Having thus described my invention I claim 1. In a mechanism of the character de scribed, a movable valve member, an oscillatory actuator therefor, a spring adapted to oscillate the actuator. and means forsimultaneously shifting the spring and the fulcrum of 'said actuator t0 and fro toward each other to cause the actuator fulcrum and the line of force of said spring to simultaneously approach and pgss each other, whereby the actuator will alternately oscillated in opposite directions to effect the reversal of said valve.

2. In a mechanism of the character described, the combination with a body having therein a plurality of ports to be alternately opened and closed, of. a valve controlling the opening and closing of said ports, an oscillatory control member therefor, an actuating spring connected to said member, and means for shifting the fulcrum of the oscillatory member, a midlength bearing upon which the member oscillates during such shiftingmovement to cause the line of force of said spring to approach these fulcrums, whereby the oscillatory member will be alternately 'actuated in 0pposite directions by said spring to alternately open and close said ports.

3. In a mechanism of the character described, an oscillatory member, an actuating spring therefor, and means controlled' by the oscillation of said oscillatory -member for shifting the fulcrum'of said member to and fro across the line of force of said spring, a valve having' operative connections with said oscillatory members. said spring being operatively connected with said oscillatory member at a point beyond the operative connection `of said member with the valve, whereby said oscillatory member willV be alternately oscillated in opposite directions under the influence of said spring.

4. In a mechanism of thev character described, a movable member to-be operated, a

pivoted actuator having operative engagement therewith, a spring adapted to oscillate the actuator connected therewith eccentricallyl in relatic` with the point of operative engagement` othe actuator and' movable member, and means for shifting the fulcrum of the actuator to and-fro across the line of force of said spring, whereby the actuator and movable member .will be operated first in one direction and then in another direction, under the influence of the spring.

5. In a mechanism of the character described. a pair of pivotally interconnected lou lever arms forming a toggle-like link, a

spring connecting the respective arms of said interconnected toggle-like link, a movable member to be operated connected with one of said lever arms, and means to oscillate the other arm to reverse said toggle-like link to and fro beyond a dead center to elect the alternation of the movable member under the influence of said spring.

lit)

6. In a mechanism of the character de- Y scribed. a movable memberto be operated. an oscillatory operating lever having a fixed pivotal connection, an oscillatory actuator pivoted to the free end of the operating lever and operatively connected with said movable member, mea-ns for-oscillating the. operating lever, and a spring tensioned by the oscillation thereof adapted to oscillate the actuator independent of the movement of the operating lever to shift said movable member. p

V7. In a mechanism of the character described,l an oscillatory lever having a' fixed pivotal connection, a second'oscillatory 'lever pivoted to the Vfree end of the first lever,

means controlled b the oscillation of the second lever for e ecting the oscillation of the first mentioned lever, and an actuating spring for the second mentioned lever tensioned by the oscillation of the first men-` tioned lever.

8. The combination with a fluid pressure operated prime mover of a movable control valve governing the action ofthe fluid pressure upon said prime mover, an oscillatory actuatlng member for seid valve the opposite ends of which are simultaneously l limit of its to andro movement, and means whereby the line of force' of the spring is automatically advanced to meet said fulcmm, b the shifting movement thereof,

. substantlally as specitied.-

which is operatively movesm unison wit '65 other endof which moves simultaneously in 10. In a mechanism of the character described, an oscillatory control member an oscillatory support therefor, Huid pressure operated means for oscillating said support and a spring'adapted to oscillate the control member in a direction o posits to thedirection of oscillation of sais support under the iniiuence of the fluid pressure, and a vaive member .controlled thereby to govern the` action of the fluid pressure upon said operating means, as the movable support ap proaches the limit of its to and fro movement.

11. rihe combination with fluid pressure operated mechanism of a movable valve member, two interengaged oscillatory levers, alternately positioned in reverse angular relation, and'shifted to and fro by the operation of the fluid pressure operated mechanism, an operative -engLgngementl between one of said levers, and said valve and a spring adapted to oscillate the valve engaging lever independent of the other lever to shift the valve as the duid pressure operated'mechanism approaches the limit of its stroke.

12. In a constrnction of the character described, a reciprocatory member to be operated, a reciprocatory prime mover an oscillatory actuating member one en Vof connected with, and the prime mover, the

1,4ea,eve

the opposite direction, and a placed under tension b the action of e actuating member adapte to bodily swing the actuating member about its operative connection with' the prime mover to its alternate position`to reciprocate the member to be 0 erated as the prime move'i` approaches t e l limit of its stroke.

13. A movable control member, a rime mover governed by the movement o said control member, an interconnecting actuating member, one end of which is connected to and moves in unison with the prime mover, the other end of which moves simuL taneously in the opposite direction and a spring adapted to oscillae Athe actuator independent of its oscillatory movement under the influence of the prime mover to shift said control member as tbe prime mover apl of its point of operative engagement with the valve said pivotal connection being reciprocated to and fro by said ilnid operated means,` said spring being connected to the actuating lever -at the opposite side of the point of operative engagement of the lever with the valve, whereby the shifting of the pivotal connection will eect a movement of the point of connection ofthe sprin the opposite direction until the line of orce of the spring and pivotal connection of the lever pass one beyond the other, whereupon the spring will oscillate the lever about its pivotal connection to impart movement to the valve.

15. Ina .construction of the character described, a .novable member to be operated, an actuating lever having a pivotal connection with said movable member, means for moving said lever to' and fro a guide for said lever dui' its sliding pivotal movement whereby said movable memberI will be una'l'ected thereby, and a sllring adapted to shift the movable member w en the lever has been oscillated about its connection therewith toa predetermined position.

16. In a mechanism of the .character described, a valve member ca able of alternating movement, a spring or imparting a snap over action to the valve, an oscillatory actuating member having an intermediate operative connection with said valve, means for oscillating the ends of the actuating member Simultaneously in opposite directions about its operative connection with the valve to tension said spring, whereupon the actuating lever is oscillated in unison with the movement of the valve about a center eccentric with its initial oscillatory movement under the infiuence of the spring.

17. The combination with a fluid pressure operatedmechanism, of an alternating' control valve governing the action of the fluid under pressure upon the mechanism, of snap over tumbling means for the valve including an oscillatory llever movable in unison with the iiuid pressure actuated mechanism, a second lever pivoted to the first lever and having its free endoperatively connected with the valve, a spring connected to the second lever and tensiond by'the movement of the first lever to actuate the second lever independent of the first lever by the reaction of the spring when the interpivotal point of said levers is moved across the line of force of the spring, to shift said control valve.

18. In a mechanism of the character described, a valvemember capable of alternating movement, a spring for imparting a snap over action to the valve, an oscillatory actuatin member having operative connection wit the valve, and means for simultaneously shifting the spring and fulcrum of said osclllatory member toward and across each other, whereupon said spring will effect the movement of the valve and actuator to alternate positions. r

19. In a mechanism of the character described, a valve member capable of alternating movement, a spring for imparting snap over action to the valve, an oscillatory actuatin leverI having operative engagement with t e valve, stationary stop members englged by the actuating lever at the opposite its of its stroke, means for shifting the fulcrnm of said actuating lever to and fro across the line of force of said spring wherebythe spring will alternately influence the movement'of the valve and actuator to alternate positions.

20. In a mechanism of the character described, a valve member capable of alternating movement, a spring for imparting snap over action to the valve, an oscillatory actuating lever having operative engagement with the valve, stationary stop members engaged by the actuating lever at the opposite limits of its stroke, upon which `sald oscillatory actuating lever has a rocking movement, means for shifting the fulcrum ofthe actuating lever to and fro to impart such rocking movement thereto in relation with the enga d stop, said spring'effecting-the revers of the actuating ever into engagement with the opposite stationary stop upon the shifting of said fulcrum across its line of force.

21. Ina .mechanism of the character described, a valve member capable of alternating movement, a spring for imparting map over action to the valve, an oscillatory actuating lever having operative engagement with the valve, stationary stop members engaged by .the actuating lever at the opposite limits of its stroke, one of the engaging members having a vcam face formed thereon whereby said actuating lever is guided in its vadjusting movement. means for shift-ing the fulcrum of' said lever to i' adjust the actuating lever toposition for reversal under the influence of said spring.

22. In a mechanismpf the character described, a valve member capable of alternating movement, a spring for imparting snap over action to the valve, an-oscillatory actuating lever ha'ving a sliding pivotal engagement .with the valve, spaced guides engaged by the leve'r at the opposite limits of its stroke, cam iaces on said lever contacting the guides to control the adjusting movement of the lever, and means to shift the vpivotal yconnection of the lever in relation with .the line of force of the spring to effect the alternation .of the lever and valve un-der the influence of the spring.

23. In a mechanism of the character described, a valve member capable of alternating movement, two interpivoted oscillatory arms forming a toggle like link, a spring tending to flex the saidl toggle like link 'against the tension of which the interpivotal connection of said arms is reversible, a valve capable-ot` alternating movement operatively connected with one of said oscillatory arms, and means for oscillating said arms to and fro across the line of dead center against the tension of said spring, whereupon the further flexing of the toggle like link is effected by oscillating one member independent of the other by the action of the spring to effect the reversal of the valve member.

24.-. In a snap over tumbler mechanism for valves, the combination with a iiuid pressure operated prime mover, a movable control valve governing. the actionof the fluidv pressure upon the prime mover, a pivoted actuating lever for the valve, an actuating spring for the lever, the pivotal connection of the lever being movable to andl fro across the line of force of the spring in unison with K the travel of the prime mover, said lever having a rocking bearing between the point of connection of the spring and the pivotal connection about which the lever oscillates under influence of the spring toeffect a movement of the spring connection in a direction opposite the direction of, movement of the ivot and in unison therewith.

25. n a snap over tumbler mechanism for valves, the combination with a fiuid pressure operated prime mover, a movable control valve governing the action of the fluid pressure upon the prime mover, an actuator link for the valve pivotally connected at its oppote ends for oscillatmg-movement lll about either connection upon shift' movement of the other connection, said nk being movable about one of its pivotal connec tions by shifting movement of its opposite connection under influence of the prime mover, a spring tensioned by such movement to subsequently oscillatc the link about its shifted connection to shift the first mentioned ivotal connection in opposite direction an my hand this 15th da.

'JOH Witnesses:

E. DUNCAN, F. L. WALxl/m.

of March A. D. 1919. G; G. ElLUNDH.

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