US 1391980 A
Description (OCR text may contain errors)
N. D. RUTHERFORD.
MILKING MACHINE. APPLICATION flLEn'sEPLzvs; 1920.
1,391,980. Patentedsepn 27,1921.`
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NEALON D. RUTI-IERFORD, OF LANSING, MICHIGAN, ASSIGNOR TO UNITED NGINE COMPANY, .A CORPORATION OF MICHIGAN.
Specicaton of Letters Patent. Patented Sept. 27, 1921.
Application led September 25, 1920. Serial V1\To.'412,748.
To all whom it may concern.'
Be Vit known that I, NnALoN D. Burrianronn, a citizen of the United States, residing at Lansing, in the county of Ingham and State of Michigan, have invented certain new and useful Improvements in Milking- Machines, of which the following is a specilication. t Y f The invention relates to mechanical milkers of the intermittent suction operated type and the primary object of the invention is to provide improved valve chamberpmechanism for controlling the intermittent suction impulses to be transmitted to teat cup apparatus on machines of the described character. j i Other objects of the inventionwill appear from the following description directed to the preferred embodiment thereof, as shown in the drawings, the novel features being delined in the appended claims.
In the said drawings, Figure l is a view in vertical section of the preferred form of my improved chamber. l Figs. 2 and 3 are elevation and top. plan views respectively of the valve chamber, and Fig. 4 is a view similar to Fig. 2 being taken at right angles thereto.- Y Fig. 5 is view similar toFig. 1 of a modi--` fied form of` the valve and chamber, and Figs. 6 to 8 inclusive are views similarto Figs. 2 to 4 inclusive showing modified forms of the valve and valvechamberof Fig.ll. v v.
Referring tothe preferred form of the invention yshown in Figs. 1 to 4 inclusive, the wall of the chamber of cylindrical form with a dome-shaped or hemispherical top is indicated generally by reference character `1() and is provided adjacent the top' Vof vthe cylindricalbody thereof withra peripheral flange Il perforated at suitable intervals and threaded to receive screws 12y forsecuring the chamber to the top cover or lid13 of fa milk receptacle; Leading from the curvilinear or dome-shaped top portion are two nipples 14, 15,the former having flexible pipel connection 16 leading to asuitable teat Acup. device commonly called a claw and the latteralso having a flexible connection 17 leading to a suction pump device of any suitable form as commonly used in this typejof milking machine. The main body portion of the chamberl() is cylindrical in formvand is open at the bottom,being provided near the l. bottom extremity'. with a peripheral thickened portion or bea-d 18 adapted to furnish a seat 19 for the bottom closure valve member, indica-ted generally by the reference character 20. The latter is provided withy a peripheralseat portion 20a adapted to cooperate with the seat 19 of the valve chamber to form an air tight closure whenever the air on the interior of the chamber is exhausted, and' there are upstanding spaced members 20b and 2Oc preferably formed integral with valve 2O and having in their outer faces indentations or sockets 2Od adapted .to receive suitable means for anchoring or holding the valve 20 adjacent the lower j endvof the chamber and at the same time allowing suliicient movement for the valve to open and closein relation toits seat 19on the chamber. This means consists of two pins one of which, as indicated by reference character 21, is fixed by being a drive lit in a perforation through'the thickened portion 18 at the bottom of the chamber and has a part thereof projecting to the interior of the chamber for cooperating with one of the cavities 2Od 0f the valve..l Diametrically oppositethe iig-Xed pinr21 I provide a removable or adjustable pin for engaging the cavity 201.k in the diametricallyopposite projection 2Ob ofthe valve. This pin is designated by reference character22 and is screw threaded for a portion of its length, as indicated, and provided at its outer-extremity preferably' with a knurled head 23. In order to provide a suitable bearing portion for the threaded part thereof, I provide an enlarged opening inthe thickened kwall 18 of the chamber, which is screw threaded and takes the cooperating threaded plug 24, hav-' inga suitable head, as indicated, so that it may be locked( in its adjusted position against the chamber wallfand furnishes a 'suitable bearing against which the knurled head 23 of pin 22inay be locked in its adjusted position, the central portion of the plug 24 being perforated and threadedto i portion 0f pin 22, as
suction closed valve'20 to the lower end of the chamber, for it will be apparent that there is sufficient play or looseness between the projections 20b and 20c and the walls of y the chamber so that when the pin 23 is screwed outwardly so as to withdraw the end thereof projecting into the chamber and the valve 2O will easily drop down at that side and may be pulled off the pin 21 so as to be detached from the chamber for cleaning purposes, but when the pin 22 is in position and within the cavity 2Od of the valve it will also be apparent that the valve will be heldv in its working position capable of being seated to form an air tight closure at the bottom ofthe chamber when there is a vacuum produced within the chamber, and when the vacuum is relieved on the return stroke of the pump it will be apparent that the valve will drop by gravity to the open positionas illustrated in Fig. 1.
The manner of operation of a suction valve in a milking machine of the described character is well understood, it being notedthat when the suction pump exhausts the air Figs. 5 to 8 inclusive the chamber of substantially the form shown in Fig. 1 is indicated by reference character 30 and it is provided with the nipples and iiexible tubes 14 to 17 inclusive like the valve chamber of Fig. 1. The cylindrical chamber 30 is in this instance provided with a peripheral en-y largement near the spherical top portion, as indicated by reference character 31, the same being slightly grooved to have the cover 32 of a milk receptacle attached thereto by soldering, as indicated at 33. As in the case of the chamber of Fig. 1 the bottom of the chamber 30 is provided with a thickened portion 34, which is perforated at diametrical locations and provided with fixed pins 35 which protrude a short distance, as illustrated, on the interior of the chamber, the bottom portion of which is provided with the valve seat 3G. A valve 37 having a circular seat portion, as indicated at 37a, is provided, the form of same being illustrated in Figs. 6 to 8 inclusive. This valve, like the valve of Fig. 1, is preferably also formed of aluminum or some analogous light material, and is provided with an upwardly extending portion 37b, which has diametrically opposed ledges 37C, each of which are provided with an undersurface arranged at a slight angle to the normal plane of the valve 37. The angular under-surfaces are indicated generally by reference character 37d and each is provided with an indentation 37e of semicircular form in cross section being adapted to coperate with the pins 35 and forming a sort of bayonet joint so that when the ledges 37c are arranged angularly in the general form of screw threads the valve 37 may be inserted into its seating position in the lower end of the chamber and by a turn cause the thin portion of the ledge to pass over the pins, and'said pins may be caused to engage the valve in the indentations 37e and the valve prevented from rotating further by the thickened portion of the ledge. This construction is efficient and obviously is much easier of insertion and at tachment to the lower end of the valve cham ber than is the valve of the form of'Fig. 1, which requires manipulation of the screw to secure the valve in its working position.
In order that the invention might be understood the details of the preferred embodiment of the invention have been de scribed but it is not desired to be limited to the exact details, since it will be apparent that persons skilled in the art may resort to various modifications without departing from the purpose and spirit of the invention.
1. In a valve mechanism for milking machines, the combination of a chamber provided with outlets leading to a vacuum producing device and to a teat cup, said chamber being provided with a downwardly opening lower extremity, a valve seat adjacent. said lower extremity, avalve for coperating with said seat at the lowerextremity of the chamber and comprising a substantially circumferential member having a peripheral seat face thereon adaptedy to cooperate with the valveseat on the chamber, a vertically extending member above said valve face, said vertically extending member on said valve being undercut, and means securedA to the wall of the chamber on the interior thereof adapted to extend into the undercut portion of the extension on the valve to secure the latter in its normal working position.
2. In a valve mechanism for milking machines, the combination of a chamber provided with outlets leading to a vacuum producing device and to a teat cup respectively, said chamber being provided with a downwardly opening lower extremity, a valve seat adjacent said lower extremity, a valve for cooperating with said seat at the lower extremity of the chamber and comprising a substantially circumferential member having a peripheral seat face thereon, a vertically extending member on the valve face formed integrally therewith, said vertically extending member having diametrically opposed branches undercut in aY direction angularly to the plane of the valve seat, there being indent-ationsl in the undercut surfacesV on the seat, and being adapted to prevent the valve while working from becoming detached from the valve chamber. y
3. In a valve mechanism for milking machines, the combination of a chamber pro-V vided with outlets leading to a vacuum producing device and to a teat cup respectively, said chamber being provided with a downwardly opening lower extremity, a valve seat adjacent said lower extremity and formed integrally therewith, a valve for coperating with said seat comprising a substantially circumferential member having a peripheral seat face thereon adapted to coperate with the valve seat at diametrically opposite portions thereof adapted to extend on the interior of the chamber when the valve is in working position, and means secured to the wall of the chamber on the interior thereof adapted to coperate with said vertical extensions to secure the valve in its normal working position.
4. In a valve mechanism for milking machines, the combination of a chamber provided with outlets leading to a vacuum producing device and t0 a teat cup respectively, said chamber being provided with a downwardly opening lower extremity, a valve seat adjacent said lower extremity and formed integrally therewith, a valve for co* operating with said seat comprising a'substantially circumferential member having a peripheral seat face thereon adaptedl to cooperate with the valve seat on the chamber, vertical extensions on the valve at diametrically opposite portions thereof adapted to extend on the interior of the chamber when the valve is in working position, and means secured to the wall of the chamber on the interior thereof adapted to coperate with said vertical extensions to secure the valve in its normal working position comprising a pin fixed in the wall of the chamber and a second pin screw threaded and being adjustably secured in the chamber wall.
5. In a valve mechanism for milking machines, the combination of a valve chamber, a valve seat surrounding an opening in the chamber wall, a valve coperating with said seat, said valve being provided with vertical extensions on diametrically opposite sides of the valve and said vertical kextensions being provided with laterally extending sockets, a pin fixed in the wall of the chamber and extending to the interior thereof for coperating withone of the sockets on the vertical extension on the valve and a second pin adjustably secured in the wall of the chamber and extending to the interior and being adapted to coperate with the socket of an extension on the valve to retain the valve in its normal working position.
6. In a valve mechanism for milking machines, the combination with a chamber provided with a valve seat, a valve adapted to1 coperate with said seat, said valve being provided with diametrically located vertical extensions each of which have laterally opening sockets therein, a fixed pin on the interior wall of the chamber for coperating with one of the sockets of the valve, a member screw threaded in the chamber wall and a screw threaded pin adapted to cooperate with said screw threaded member for engaging the socket in the other vertical extension of the valve t0 retain the valve in its normal working position.
In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 9th day of September D. 1920. Y
N. D. RUTHERFORD.
T. R. TAFFEE, OLIVIA WALKER.