US1998772A - Variable stroke pump - Google Patents

Description

- April 23, 1935. w. H. S-WARTZ ET AL VARIABLE STROKE PUMP Filed Aug; 29, 1931 5 Sheets-Sheet 1 INVENTOR &0 ATTORNEY April 23, 1935. w. H. SWARTZ El Al.

VARIABLE STROKE PUMP Filed Aug. 29, 1931 5 Sheets-Sheet 2 a 4 mm [9 1 ATTORNEY W gw- April 23, 1935. wjH. SWARTZ El AL 9 3 VARIABLE STROKE PUMP Filed'Aug. 29, 1951 :5 Sheets-Sheet 3 lNVENTOR BS mai ho ATTORNEY Patented Apr. 23, 1935 VARIABLE-STROKE PUMP William H; swammohmese; swartzi'y rle Par, fiassignors to General Machine 'Works,"Inc., Yorke Pas, a'corporation o-f'lennsylvania Application August "29; 1931 Serial No 560,196

Theninvention -.'re1ate s to :majchines: by' meansof which grease; liquid; lpaste -granulated materials 1011 the: like areapplied or=distibuted and has:

for aitssgeneral. object P the provision of means for automaticahytdelivering;- anyjgiven 2 quantity or grease" or other: materials as qthe: distributing means: at 1 any: regular: or irregular: intervals; vit-- in :on" its operation. the? same feeffects contro l :01":

therfeedv .orsrdistribution of the grease For other: 20 material toiqthe pans or anything; elsei-rto 1 be coated; a a Afifurtherfobject :ofi athe invention-date provide an: attaehment ohthis character; wherein there is embodied: 1 pump; means for "supeiyin'gx grease 1'01 theiikeitoaswabsnor otherngreasinggeiementspthe attachment :beingrsusceptibiebf 'acwariabi'ewstroke: so that 1' a;= predeterminediiquamtity of Ilg-reaseor other:substancecmayi'beufedn. I

A stil-lsfurther object ris to' provide :an. attachie 'ment of this character in which thereis=arposi tive 1 andv definite contreh means 1 01" regulating the zfeeddof rgrease for-the like to: the distributing means this --c o'ntro1 means: being moreover; oi such iormeanduarrangement iasyto= lz ewcapable- 0t havingvapplied.thereto-igraduations or visible in. dicia whereby any: desired adjustmentssmay; be baz oughttabouteto insure the propenrate-chfeed 0t materiaI- .te the disti 'ibutingnieans: f

, Anadditionahobiectisto provideera mechanism or. attachment ,oi this v'ch'aracter which :wilL-be- Figure 3is awertical crosssectional view taken: on substantiallythedine14 4 oft-Figural. I

Figure 4 is averticaldetailrsectional view taken through one ojf.the distributors. I

Figure: El is acfragmentary iew partlysin eievas tion and v partly, in section-V showing one of themechamcaL-features, invol vedin theinvention Figure 6 is a detaii herize tai section showing: a plan iew --of :the lever 0m tor-rendering: the: grease cfeedin-gg: mechanism temporarily inefiemtive.

Figure 1ine-8 8 .o Figure16n- 'i is a detail cross sections takenvcn the rReferringmorerparticularly towthesdrawings werhaveshown: ea maehinec-for greasingpans of any; desired; size or shape,- this, machine compr-is ing a frame indicated. generally-b thenumerat I i! and comp-rising *anyvnecessarys-number10f (legs ii I to which aresecunedupper and lower; longitudt-v na11y.-: extending-angle bars 12 andzul3 andi'tra-ns-i versely extending angle bars. Mand I5; the va-. ricus bars ibeing secured together innany preferred manner; Obviously (it [should 4- be'. distinctiy una derstood. that there-:is; nothings, particularly, distinctive or unusualt-about the frame as theeconstructionthereof might bev varied =within:..wide limits,- the d-isclosureebeingn-simplyr for; purposes of. i11ustrati0n-.=. Mounted within-v. the-' frame I 0 spaced-i t relation: and adapted to bemoved :and 7 held in adjusted position by a screw 1 1 extending through threaded bores in the carriages 495a Secured upon eachofilthe carriages-l9is--a *retainingrbracket structured] of angular form held in place any: desired :manner-v as for example 26is1idab1y. mounted forisl id-ing movement'within all :Of-a the brackets ZI landiadapted to bemoved longitudinal-1y for. thepurpose ofefiectingsro-ta tion =01. the spindles fl Located-above and in axial I relationn-to the-hollow or tubular spindles 23-.are othentubular spindles-21 eachtof which r is formed with an annular groove 2 8 the spin "dies"?! beingaconnected With"-thespin'd1es23 by collars:29ywhicinembrace bothi andioverlap the joints :between; them; the'collars being secured to the. spindles; 23 as-fl-by: set screws: and" being secured with respect to the spindles 21 as by other set screws 3| carried by the collars 29 and engaging within the annular grooves 28. At its upper end, each spindle 21 is provided with a carrier 32 having upstanding pins or the like 33 constituting a grip or clutch for holding a swab, brush or the like 34 preferably of somewhat tapered or conical form. The respective swabs 34 are intended to engage within the-pans 35 to be greased or otherwise treated or coated. Logically the swabs or brushes 34 must have interiorly located ducts communicating with the hollow spindles 21 for the purpose of conducting grease, oil or in fact any other desired substance into and through the swabs so that the material will be applied to the pans 35 in the form of a coatmg.

Mounted at the top of the frame ['0 is a traylike casing or guard 36 within which'is' a pan support 36 and having a bottom wall 31 located beneath all of the brushes or swabs 34 and provided for the purpose of preventing the grease 'or other -material from being thrown out and onto surrounding objects, it being a feature that any desired drain means whatsoever, not shown, may be provided for the purpose of conducting back into "the supply source the surplusgrease,

sired manner is a shaft 38 carrying any desired number of crank arms 39 connected by a link 40 with a longitudinally'extending shaft 4| which extends throughout the length of a longitudinally extending trough or hopper 42 adapted to contain grease, oil o'r in fact any other substance to be applied to the pans 35 or any other analogous articles or objects. The trough or hopper 42 is carried by one or more members 43 on the upper end or ends ofone or more plungers 44 urged upwardly by a spring or springs 45. Within the hopper or trough 42 each spindle 23 is surrounded by a sleeve 46 which acts as a cylinder with'the hollow spindle serving as a piston. Any suitable pump and valve means may be provided, not shown, so that the grease or other substance will be caused to enter the cylinders 46 and pass from them into and through the spindles 23 and 21 to and through the swabs or brushes 34.

The means for controlling the feed or supply of grease or other substance to the pans or other objects to be treated is herein disclosed as comprising, a constantly driven shaft which might be the main shaft of the machine or which may be driven by an electric motor or in fact any other type of power device. This shaft 49 carries a pinion 50 meshing with an intermediate gear 5i suitably journaled and carrying a pinion 52 meshing with a relatively large gear 53 suitably journaled on a bracket structure 54 mounted. at the intermediate portion of the frame Ill. The gear 53 is shown as formed with a plurality of spaced projections 55 upon a selected'one of which is secured as bya single screw 55a a cam (looperating'with the cam 56 is an angle lever 51 pivoted intermediate its ends on a suitable bracket as shown at 58 and provided at one end with a roller 59 adapted to be engaged periodically by the cam 56. The other end of the lever of the shaft 38.

51 is formed with an eye 60 having its interior of toroidal shape as clearly illustrated in Figure 7 and receiving a pin 61 projecting from one end of a rocking lever 62 which is pivoted intermediate its ends as shown at 63 and which has its other end formed with an eye 64 slidably engaged upon a vertically arranged rod 65 having a threaded connection 66 at its upper end within a'socket 6T pivotally connected at 68 within a clevis 69 on one end of a crank arm 10 on the end The vertical rod 65 carries a stop collar H against which the free end of the rocking lever 62 engages, and beneath and abutting against the free end of the lever 62, or against 'the eye 64 at the end thereof, is a spring l2 which in turn abuts against an additional collar l3 secured on the rod 65. Clearly, when the rocking lever 62 is oscillated about its pivot 63 the cooperation or engagement of the eye 64 with the collar 1| will cause vertical reciprocatory movement of the rod 65 and socket 61 and consequent rocking movement of the crank arm 10 and rock shaft 38, and as the latter is connected by the crank arm or arms 39 with the link or links 49 carrying the cylinders 46 the cylinders are moved with respect to the pistons therein for effecting the pumping action and in this way the quantity of material fed through the hollow spindles 23 and 21 to the swabs or brushes may be regulated.

Cooperatingwith the lower end of the vertical rod 65 is means for limiting its downward movement, this means being here disclosed-as comprising a quadrant l4 eccentrically" pivoted as shown at T5 and formed in its periphery with a plurality of notches 76 adjacent which there may be provided graduations or indicia of any sort desired for giving the operator a clear reading as to the position and length of movement or travel of the rod 65 and consequently the pump stroke. The quadrant is of course pivotally mounted and it is intended that its position be altered to bring about the desired results, and. forthis reason we have shown and integrally formed wing nut or hand-piece I! by means of which it may be quickly and easily turned without any necessity for the employment of tools. The lower end of the rod 65 is rounded and may be engaged within a selected one of the notches 16 in the circumference or periphery of the eccentric quadrant 14.

Clearly, when the main shaft 49 is rotating the reducing gears 50, 5|, 52 and 53 will be driven and the cam 56 will periodically engage the roller 59 and rock the angle lever 51 periodically so that the rocking lever 62 will be correspondingly rocked or moved in an oscillatory manner upon its pivot 63 so that the eye 64 cooperating with the stop collar H on the rod 65 will cause the latter to move vertically, resulting in rocking movement of the'crank arm llLshaft 38, and crank arm 39 for varying the stroke of the pump mechanism.

Obviously, by rotating the eccentrically mounted quadrant 14 the distance between its pivot and the successive notches or depressions 16 maybe varied so that the extent of movement of the rod 65 and consequently the pump stroke may be varied. V

' Another important feature of the invention resides in the provision of means for rendering the entire pumping mechanism ineffective temporarily in case it is necessary for the operator to leave the machine for a short length of time. In accomplishing this. we provide a rock shaft 8| which is vertically arranged and journaled in suitable brackets carried by the frame, one bracket having spaced lugs indicated by the numeral 82. At its upper portion this rock shaft carries a handle 83 bymeans of which it may be partially turned, and at its lower portion it carries an arm 84, more clearly disclosed in Figure 6, having a. hub portion 85 fitting. fairly closely between the lugs 82. This arm is adapted to be rotated partially so as to interpose it between the lower end of thevertical rod 65 and the notches in the periphery of the quadrant 14. For this reason it is preferable that the arm 84 be wedge shaped in cross section as shown in Figure '7 so that when the rod 65 is in its elevated position the operator may by grasping and moving the hand lever 83 partially rotate the shaft 8| to force the thin edge of the arm 84 between the lower end of the vertical rod 65 and the quadrant 74 so that there will be nothing to move the shaft conducting a supply of grease or other substance to the swabs which operate within the pans or other containers. It will be noted that we have made ample provision for adjustment of the stroke or" the pump so that the quantityof material supplied to the swabs or other equivalent elements may be'easily controlled. In'addition,

a very simple adjustment has been provided whereby the rate or feed of the grease or other substance may be accurately set and maintained.

constant; Attention is also directed to the feature of the release lever mechanism which is adapted to'cooperate with the adjusting means for the purpose of rendering the pump mechanism entirelyinactive or ineffective temporarily while the operator is attendingto someadjustment .on, the machine or while he might have to leave it unattended for a few moments. It is believed from the above ,thatythe' construction, 7

operation and advantages will be readily apparent to one skilled in the art without further explanation.

While we have shown and described the preferred embodiment of the invention, it should.

be understood that we reserve the right to make all such changes in the details of construction and the arrangement and combination of parts as will not depart from the spirit of the invention or the scopeof the subjoined claims.

Having thus described. the invention we claim:

In a pump mechanism, a constantly rotating shaft, a cam device operatively driven by said shaft through reducing gearing, a lever movableby said cam device, a plungeroperatively connected with said lever and with the pump mechanism, spring means urging said plunger in one direction, and means for limiting movement of said plunger against the resistance of said spring means comprising a quadrant eccentrically' pivotally mounted with its periphery inabutting engagement to the plunger, means for shifting the position of the quadrant, and means disposablebetween the plunger and the quadrant for maintaining the former against movement regardless of the position of the latter consisting of a rod equipped with an'operating handle, and t a tapered arm on said rod interposable between the end of the plunger and the periphery of the quadrant.

WILLIAM H. SWARTZ.

CHARLES G. SWARTZ.

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