US2145825A - Lubricating mechanism for sewing machines - Google Patents

Description

Jan. 31, 1939. J. P. wls ET A1. 2,145,825

LUBRICATING MECHANISM FOR SEWING MACHINES v Filed Nov. so, 1934 4 sheets-sheet 2 INVENTOR f6/vz P Waals BY Fmc/IF Zeler N lllllllllllllllllliJ .3

www@ TN Jan. 3 1, 1939. .J. P. wEls 'ET AL LUBRICATING MECHANISM FOR SEWING'MACHYINES 4 Smets-sheet a Filed Nov. 30, l19,34

*u ne .-,Petent'ed-Jen. 31, '193s i LUBBICATING ausm srs-ommen ron slt'wnmt sono n'we'u cna mau-lcs r. zene. Nmk. N. rf..v

assignorsto Willcox '& Gibbs sewingV Machine Company, New York New York. N. Y., a'. corporation of "e .Applicaties November, im, No. :sans

ze. cmu (ci. 1st-s) g This invention' relates to improvements in lubricating mechanisms' primarilvfor sewing machines, and is a continuationl in part" of our application Serial No. '745,343,1iled Sept. 24, 1934. f It is an object of the present inventionto proevide an improved system and mechanism for, automatically lubricating various operating instrumentalitiesfso that the machine may be made more compact, and whereby the speed, eillciency.u

1 0-and effectiveness of the machine may be' erihanced.

It is another object of the present invention to;

lprovide improved mechanism fordistributing oil to the various operating parts;

usv Features in connection with this object include the provisionof novel inverted or'hanging variesv along' which the ou may treve1 en d be directed to predetermined locations orbearings, and the provision of a novel distributor pan f or regulating and directing the iiow of oil to main,operating` connections. ,This feature also has the advantage of insuring a feed of oil to various bearings and the like for a considerable period `after the ma# 'chine is stopped, thereby improving the easy starting characteristics of the sewingmachine. j

Yet-another object of the present invention is.

y the provision of improved pumping apparatus for forcingv thefoil from a low collectin point to a hig'h distributing point.

Features in connection with .this- 'object are the provision of a novel pump which may be made integral with the bottom plateofv the chamber so as 'to belremoved therewith, Awherebya worn or broken pump or parts'thereof may be easily or 35,quickly replaced without' disturbing other instrumentality in the machine.

yA further feature in connection withtmsobject' Y is tln'e'provision of an oil pump made'in large part.

from the regular operating instrumentalities in .the sewing machine thereby's'aving the expense lof a separate ou pump and particularlvin dismissing'v with separate and intermediate or indirect driving connections for 'a separate oil pump.

Because it -is very important that-a high speed -sewing machine `be' properly lubricated yetall4 times, it is an important object of theA presentv invention to provide means so that the operator l may be apprised or may check the condition,

' nature. and extent of lubrication. f

substantially exposed to view for indicating the nature and extent ofoil. eduction, located in an l 'accessible-and. at all 'timesvi'sible location, and

ASome of the features inlconnection with last object include the' provision of' a glass-.plate bodiment,

oil in the oil-chamber which. in the present emlso serves both as a wallto the oil. chamber and as a gauge plate for indicating the extent of feed or the number f stitches per inch.

A It is another object of the present invention'to s provide a forcedeed of'lubricant through, preferably without separate pipe lines,` to remote bear- -A feature in this connection'is the provision of valves on the ends of operating rods adapted to l0- permit pil to be forced therein at predetermined times. and which may be used either with or withoutgravityfeedofoil. l I

Beretofore it vhas-been customary to provide so called gear or centrifugal pumps for lifting and wl forcing oil to the various operating parts and it has beenl thought impractical to use a plunger tipe pump for thisv purpose. However, the prese t invention provides two very practical reciprocating or plunger type pumps and discloses a novel 20 means to a smooth rather than a pulsating Fig. 3 is ya. longitudinal section taken on line ao, l-l in Figfl. but shows the cloth plate removed fromy the lower arm.

Fig. 4 is a vertical section view through Athe head end of the machine, taken on line 4-4 in Fig. 1.

Fig. 5 is avertlcal section view taken on line zu;A

. lllig. 6 is a longitudinal section view of acrank arm. t

ng. 'l i's a fragmentary view of one form of oil1 pump provided by the present invention, similar 40 to that shown in 1, but in section.

.i Pig. 'lA is a sectional detail of amodiiied plug andvalve.- f

8 is a fragmentary view of the looper mechanismat the lhead end of the machine. v

Fig. 9 is a fragmentary view of another4 form of Mg. 10 is aview of the'oil level indicating plate. Fig. l1 is a top plan view of the form of pump Fig. yl2 is asoctional view of the pumpshown- 1I-1g. is u e. aetscned viewcitnecu distributor muentinvention'isnot iimitedtothe de-v .f

tails of construction and arrangement of parts illustrated in the accompanying drawings because the principles of the invention are capable of other embodiments, and the phra'seology employed is for the purpose of description and not for limitation.

Although the improvements in lubricating mechanisms of the present invention are capable' of use in various sewing machines, and in other machines, they are particularly advantageous and useful with the sewing machine illustrated and described in detail in our eopending application Serial No. '145,343 filed September24, 1934. and are therefore illustrated and described in such relation herein.

In the detailed description which follows various main parts or main mechanisms in the sewing machine are described in considerable detail in separate headed sections in order to cle'arly disclose the purposes of the improved lubricating mechanisms of the present invention andin order to facilitate a quick understanding thereof. Frame and general structure Referringnow'in detail to the drawings, particularly to the general structure shown in Figs.

provides va substantially rectangular in cross'section withy transverse webs 26 and 21 for supporting aneedle operating rod 28 in suitable'bearings 29 and 30. At its outer end the upper arm 2| `is provided with a head 3| for supporting a. presser bar 32 and needle bar 33 in suitable bearings 314 and 35 respectively for reciprocation relative to the lower arm 22.

A finger 36 is secured to the link connection 31 to the needle bar 33 in order to reciprocate the latter.v -A hand leveri38, see- Fig. 4, pivoted on astud 39 has a cam 38' for engaging an 'arm 48 on the presser bar 32 in order, to raise a presser foot 4| at the lower. end thereof away from lthe lower arm 22.

The lower arm 22 also houses or supports alooper mechanism 42 and a feeding mechanism 43, but itis substantially'open inorder to facilitate chang ng, repairing, and adjusting vari- I ous .parts of hesemechanisms as may be seen best in Figs. 1, 3', 4, and 5. Although it'may .be made as a separate part and secured to the hollow chamber 23 it is preferably made integral therewith as shown with a horizontally extending front wall 44and rear wall 45 and' with a transverse end wall 46, and intermediate wall 41 pref-` erably extending fully between front and rear walls in order to provide a rigid support.

The Vlooper mechanism- 42, shown in-Figs.\1, 3,

and i is of the s'o-called transverse looper (or, llooper operating across the line of feed) type and comprises a looper carrier 48 f0rming an interchangeable mount for various loopers 49, and

having needle loop taking travel from' the full line to the dot-and-dash line position shown in Fig. 4. .The sleeye is capable` of rocking move'- ment onen upper rod but is held against axial v outer end of the needle operating rod' 28 and is provided with a or sliding movement thereonby a pair of collars 52, this rocking movement being accomplished automatically through a lower connection 53 to a lower or rocking rod 54, shownin Figs. 1 and 4. Needle loop taking travel is eected through automatic reciprocation of -the upper rod 55.'

Because the lower and upperlooper rods 54 and 55 operate at very high speeds during the normal operation of the sewing machine, it is desirable that theyl be sturdily supported and'well lubricated, and the lower arm 22 'provided by the present invention and lubrication ,mechanism also provided by the ypresent invention are arranged to accomplish this in a marked degree.

Support thereof is accomplished through the provision of suitable bearings 56, 51, 58 and 59 for the upper rod 55 and similar bearings 60, 6|, 62, and 63 for the lower rod 54 in the wall 46 intermediate Wall 41. and in the hollow chamber side walls 64 and 65 respectively. The bearings 51 andf 6| in the intermediate wall 41, or bearings 56 and 69 in the' outer endwall 46 may be dispensed with; however, because there is considerable inertia transmitted indirectly to the operating rods when the looper carrierl 48 is rocked four thousand or more times per minute, it is desirable to steadily support the rods and to this end it is 'preferable that the disclosed plurality of bearings be used.

The feeding mec nism 43 comprises a feed dog 66 mounted on a spring connection 68 to a linger 69 secured to a feed rockerrod 10 by -a yoke connection 69 and having a flat spring 1| and coil spring 12 connection to a finger 13 secured to a feed lift rod by a yoke connection 13'. .I Four motion travel is imparted to the feed dog 66. when thev feed lift and feed rock rods 14 and 10 are operated a predetermined extent, preferably timed in a manner to move materials when the needle 15 is in raised and free position relative-to the ma terials between thepresser foot 4| and the feed dog 66.

A main drive mechanism 16 about to be described in.considerable .detail is provided to impart predetermined and coordinate movement to the rods 28, 54, 55, 10, and 14 in order to reciprocate the needle 15 and to impart vfour motion operation to the looper 49 and to the feeding mechanism 43 all in timed relation, one relative to the other, l

Worksuppm't a feed dog carrier `61 having A worksupport 11 of the present sewing machine includes a large cloth plate 18, for example, on bosses 19 of the lower arm'22 and secured thereto by suitable screws 80. linv adaptor 8| within a U-shaped cut-out 18' in the cloth plate is also adapted to rest upon some of these bosses to vsupport interchangeable throat plates 82'havbo ing cut-outs 83to accommodate variously shaped feed dogs 66. 'I'he machine is capable of accmmodating a large variety of cloth plates and throat plates so that the machine may be readily *converted from a single line to multiple lne cloth stitching, and more particularly so that` it may visionalapplication Serial No. 750,259 filed Oc- -tober 27, 1934. Y -Drivingmechansm and operating connections I be converted from a feed across the arm to a cylindricalor lfeed around the arm type of machine; the structures and features thereof being more completely disclosed and described in a di- -ported in a horizontal-.plane height of the hollow cham-V by 'a ball bearing 85 within awa-sais ing a plurality of cranks A, B, C,l D, and 'E'. supsubstantial1y"mid wayin the vertical ber 28,' at one end a suitable bore 88 in the wall 04 and being sealed against oil leakage at this point by a cover plate 81. At -its opposite end the mainshaft lis supported preferably with a ball bearing 80v iny a large cover plate 89 as may'be seen-best in Fig. 1,

the latter in turn being supported within'a large` bore 90 by screws 89'.

Crank 'arm 9| has' a bearing connection 82 with crank A at its lower end and has -another bearing connection y98 to a stud 94 at the outer end of an arm 95 carriedby the needle operating `rod. A short crank arm 90, havingza connection 91'to the crank B, and connection 98 to abeli crank 99- pivotally mounted ons cross rod |08 and in turn connected to the upper -rod 55 by a con-M Vnection |I, yis provided to reciprocate the upper other crank arm |02 isconnected to the crank C at its upper end through abearing |08,

.and at its lower end. is, through a connection |04,

associated with an armsecured to the lower rod 54 by a suitable yoke inorder to impart rock` 'fing movement thereto:- the .crank arms 98-and v|02 being adapted to impart eliptical or four wavt travel or movement to the looper 49.` f

Crank arm connections are also provided to impart suitable movement to the feeding mechanismi 43, viz.,. a crank a'rm |08 has a connection *|01 with a crank'D atits upper vehd'and has a connection |08 to an arm |00 secured to the feed lift'rod 14. Another crankarfn ||0 has a-conf nection |I`|to the crank E' at its upper end and through a link |I2 at its lower end is connected f per inch. This adjusting mechanism is very to an arm' ||3 secured to the feed rocker. rod 10.

.An .adjusting'mechanism I I4 is provided to' shifta pivot ||5 lengthwiseof the crank arm I|0 in vorder to vary 'the extent of feed rocking movement and thereb'y to vary the number of stitches completely described inthe copending application Serial No. '147,811 led .October 1l, 1934.

However, it-.shouldbe particularly noted that the adjusting mechanism includes a pointer ||8 adapted to'be moved vertically as the -pivot stud v I I5 vis moved vertically by a screw I i1 connected to a carrier block- I I8.

" The cranks A through E are lsoproportioned that coordinate movement is imparted through -the operating -connectionsjust describedin detail to the needle 1l, looper meehanisnif'42, 'and feedinggmechanism 48. VVarious adjustments may be andare provided for the looperimechaf nismv and the needle but detailed description is omitted at `this point because such adjustments i have no bearingupon the lubricating mechanisms.

forming the main subject matter of the present application. For similar reasons further descrip- .'tio'n of multiple needle and; rnultiple looper ar rangements are not given herein.

Lubcatinq mechanism I It a fundamental aim inthe dvelopment of'. the oiling mechanism comprising'the present viii-- vention to lubricate, y automatically', v.substantially especiallyto lubricate automatically the present invention.

rlocations. for example 'through f capillary action, the thereof.-

. A novel mechanism Werl'ying the all the moving P rts in the sewingmachine, and main' bearings thereof in a very en icient rliann er .A This is accomplishedwith a combination force, gravity, capillary, spray feed of oil to the varic'mliv -parts with novel-mechanism provided' by the To this end the/hollow trunk 28- forms a sub-A stantially encioed'chamber, and. forms a lower ormain reservoir ||8 at the bottom thereof Afor storing the supply of oil orv other lubricant |20.

However, inorder for the oil to serve itspurpose -it must be directed to the various operating in- .strumentalities in an even and' u nfailing manner. l

Accordingly, A the present invention provides pumps |2|, |22, and.'|28, each hereinafter described in detail, either of which is adapted to draw the oil from the ,reservoir ||9 and force it upwardly through an eduction tube |24 to the very top ofthe hollow under side of a .glass plate |25 and of the top plate 24 in such manner that the bulk of the oil -will fall back intoan upper reservoir |15. and so that some of it will now by gravity and partly by the force feed of the oil as it is expelled from the top of the eduction tube over the under side. of the top plate.

' Somev of this oil flows along vanes |21 on the underside of the top plate and at the lowest point thereof collects into drops |28 to fall in prede-- termined locations upon movable parts, or runs through channels or vanes |80 down along the sidewalls of the chamber to other predetermined aligned hols |3I inthe bearing 29 andneedle operating rod 28 for passage directly into the latterv rod where, by il ows toward the outer end flow of .oil to the outer end. Auxiliary oil holes |90 are provided in the upper arm 2| for manual oiling under special conditions..

Fig. 6 clearly illustrates how oil may be passed directly to one bearing from another or to another-operating connection. As may be seen best in Figs. l, 2, and 6, drops of oil |28 ilow from the 'vane |21. into the entrance port |31 in the top cap 98 of a bearing 98 to thoroughly lubricate no' down through a channel- |98 into the other bearing connection '92 rto thoroughly lubricate the'crank A of the main shaft 84. The same feature is Vpreferably embodied in the othercrank arms 88, |82, |08,- and |I0 so that oilv passing into similar entrance ports |81- of these respective crank arms is directedilrst to the cranks v B, C, D, and E', thenceyto the connections 98,

|84, |00, and |`|2.

isprovided for passing oil t9 the cranks B thro h E and to the associated operating connections. This mechanism com--v prises-a distributor pan |89, see Figs. l and 13, preferably secured to-the side -wall V85 in any suitable manner, as in aside wall individual .cranks A through E in such 'manner lished to each vcrank and so that a substantially "equal amount'vof oil is passed tov each of the necessary. the vdisprovided withl a felt the hibri- -f .Although not. absolutely tributor pan' is preferably or similar pad |48 adopted to retain chamber A23, against the Y the stud within the two upper caps and thence by screws through holes |40 |4I, and provided with spouts |42v that .a drip feed ofoil is estab- 4.` cant so that there will be a dripping of oil or further feed thereof to the different cranks after vthe machine is definitely stopped, thereby forming an accumulation of oll on thevarious cranks and other connections which facilitates quickl starting of the unit after it has been stopped for a time. For example, the cranks have a tendency to thin the 011 and to hold the very minimum o f oil when the machine has been` run for a considerable period of time and the various operating parts and the oil have become heated. However, the felt pad |43 and the dis-4 tributor pan retain a body of oil sufficiently long to permit the various operating parts and the.

oil to cool oif and to drop the oil onto the cooled operating parts a considerable period of time after the machine is stopped and possibly until it is started again if there is no great lapse of time. Thus, it will be seen that the distributor pan |39 provided by the present invention oils approximately nine main bearings, including cranks A through E and connections 98, |04, |08, and and does this lfor a considerable period of time after the sewing machine is stopped.

The main bearings 85 and 88 for the main drive shaft 84, because they are, ball bearings and the friction very slight, require but very is thrown from the cranks-A through E and a considerable amount thereof reaches thetwo main bearings. i

Also, much of the surplus oil dripping from the top 24 onto -the arm 95 of the upper rod is thrown about in the hollowv chamber 23 with a portion of'it also reaching the main bearings.l The end caps 81 and 89 prevent surplus oil from passingoutwardly of the hollow chamber. Any

conventional oil retainer |44 may also be provided to prevent oil leakage through the chamber. 'A director plate |45 secured to the side wall 64 with a screw |46, as shown in Fig. 1, collects loil running down over the side wall 64 or drip- 60, mechanism is lubricated in ping down from crank A, and is preferably provided with notches adapted to direct the oll to the connections 98 and [0| of the bellcrank 99. An aperture |41 'in thel top of the main bearing section |48 of the bell crank 99, see Fig. 3, receives oil both from the plate |45 and -from spray or drippings within the chamber 23 crank 'thoroughly l in order to lubricate the bell while it is rocked on the cross rod |00.

The upper or reciprocating rodof the looper the mechanism of the present invention, and may be' seen best in Figs. In its present preferred form it comprises one or more openings |49 at the top of the hollow rod 55, as shown in Figs. 1, 3, and '1 particularly adapted to receive drippings of oil or oil spray being thrown about in the hollow chamber 23.

to receive oil owing down over the side walls,

or to receive oil from the .collector plate |415 from a channel |50 thereon as indicated by dotand-da'sh lines in Fig. 1. Oil Ventering these apertures iiows by capillary action lengthwise of the rod and Athrough a plurality of oil escape holes |5|,-see Figs. '1,' 8, and 9, to the a novel manner by main bearings 56, 51, and58 where full distribution is further effected by the provision of oil -grooves |52 in the bearings, Suitable plugs |53 are provided at both ends of the hollow rod 55; the one on the end of the rod within the hollow chamber 23, see Figs. 1 and '1,' insures a flow of oil toward the outer end of the rod near the looper mechanism` 42, and the plug at the outer end thereof as shown in Fig. 8 prevents adverse escape of the oil outwardly of the machine, An air escape hole |532 near the latter plugfacilitates passage of oil lengthwise of the rod and to the various outer bearings.

Lubrication ofthe looper mechanism 42'is also eiected by the upper rod 55. For this purpose, the rod is provided with one or more oil escape .holes |54, see Fig. 8, intermediate the transverse walls 46 and 41 so that oill escapes to the sleeve 5| of the looper carrier. 48 to lubricate the collar during the rocking movement imparted bythe connections 98 and '|04' in the manner hereinbefore described. Suilicient oil escapes lengthwise of the sleeve 5| to reach the collars 52 thereby minimizing the friction between the sleeve and collars. If preferred `the lower arm 22 may be made in the form of a pocket |56 at this point as shown by dot-and-dash lines in Fig. 1 to collect oil drippings, should there be any. Howeven the possibility of this is so slight, and the advantage of clearing lint from below the needle and looper'is soimportant,A

that in thevpreferred structure an opening |51 is provided. l

Oil escape holes |5'| similar to those for the bearings 56, 51, and 58 may be provided at the right hand end of the upper rod 55 for the bearing 59, but it is preferably provided with an oil entrance hole |58 at the top'of the bearing adaptedto pass oil directly to the rod as it is reciprocated'. .A

A veryv similar oil distributing mechanism is -provided for the lower or rocking rod 54 of the looper mechanism 42 for `it too is provided with oll entrance holes |60 within the hollow chamber 23 and with oil escape holes |6| to'all four ,bearings 60 through 63. Also, the bearings are preferably provided with grooves |62,to insure thorough distribution of oil, and the endsv of the rod are provided with plugs |63 andan air escape aperture |64 to insure proper distribution of oil.

The reservoir ||9 may be iilled with oil or other lubricant |20 by removing the top plate 24, or through'an entrance cup 24' Fig. 4, and may be drained The rod with a petcock 25'. |00 may be open on the ends to provide circulation of air within the 'chamber 23,-

or may be sealed on the inside end and be pro'- vided withair holes |00' on the bottom, to circulate air and thereby` cool oil chamber.

As may be seen best in Figli and particularlyV Fig. 8, the lower rod is also provided with an oil escape aperture |65 adapted'to pass oil to the operating'. connection 53, as bysmall drippings to av ball and socket section 53' thereof.

Similar mechanism is valso provided for lubricating the main bearings of the'feed mechanism 43. Fig. 3 illustrates how the feed rock rod 10 is provided with oil entrance holes |66'and how the feed lifter rod 14 is provided with similar oil ber 23 and vto direct such collected oil into the shown in within the entrance holes |61. A plate, similar to the plate A cuter ends -of the lift and rock rods the feed lift rod -and of the feed rock rod is the'same as distribution of oilto the bearings 60 4through 03 of the--=lower rod 54-of the looper mechanism 42 and hencedetailed illustration and description thereof 4seems unnecessary. Air -I escape holes |10 and '-|1| are provided nearv the u and 1o respectively to insure. proper capillary now of oil to the outer ends lof the rods for proper lubrication cf the bearings at thereof. If preferred, any or all of the hollow rods 20, 54, 55, 10, and 14 may be provided with wicks to retain and evenly feed oil to the various bearings.' Also, the machine may be secured to a bench or table at a slight angle so that the end thereof i s slightly lower than end, thereby promoting a flow of 'oil by gravity to'the outer' ends. In passing it should be noted too that separate bearings may be dispensed with andproperly bored holes Din the frame 20 itself' forvthe rods may serve as bearings within the purview of this invention, the different oil escape holes passing bearings. -V f Should anyof the oil passing holes, for example the oil entrance port |31 or channel In on the crank arm 9| or of any other crank! arm become clogged, there will always be sumcient oil supply and oil drippings to lubcate the operating instrumentalities within the hollow chamber, espe- 'ciallyl since the various parts therein are operv455 Essentially -this form of pump. comprises 'a' -cylinder59' formedby themain bearing 59 and a ated at high speeds, so that there is in effect a A ,v `double piling 'system providedby'the present in vention, viz., the direct oiling through the various V vention provides severalnovel forms of oil pumps. One form of'puxnp |2 I, illustrated in Figs.-1 and '1 particularly,

. ofthe main operating instrumentalities, .to the "end that definite economies in manufacturing costs may belgaccomplished andsthat operating '1 advantages will definitely result, viz., the oil pump absolutely will function when the 'operating'instrumentalities areworking and when lubrication `isfrequired most'. Further, there ping of belts, breaking of chain, elciencies as occur when a separatepump with an intermediate driving connection is provided.

l plunger 55 formed by the '-55-with anwinlet` valve adapted to properly 1 end of the upper rod |12 and outlet valvev |13 control 'passage of oil.

70/ 'Although the cylinder 59 may be made with an integral head, it is prefeablygprovided with-a scr/ev' |14 in order to machining -of the' interior bearing surface. The

plug |52 in' theright hand end of` the' upper rod. 75 55, as shown in llg. '1, serves the outer extremities outer v the chamber oilA directly to such bored e instrumentalities just described in detail, andthe indirect .oiling eected through theispray system.

ating mechanisms at' all times the present in-` is made as a substantially integral 'part 'of the sewing machine itself, and from some` can be no slipf and other inf facilitate` the giilidfngor to close :the hollow end of the rod and to convert this rod into a plunger in order to create a suctioncapable of drawing .oil from the oil reservoir Il! and to create pressure adapted to force the oil up wardly through the eduction tube |24 'to an upper oil reservoirlll.

Operation of the pump |2| is as follows: as the upper rod 55 is reciprocated by the crank B, crank arm 96, and bell crank needle loop taking travelto the-looper 48, the

' plunger 55' is'reciprocated within 'the cylinder v, pressure chamber |16 embraces the section between the pump inlet valve |12 and the pump outqlet valve |12 and therefore includes both the cylinder 59 at the end of the upper rod 55 and the chamber at the end of the lower rod 54, which latter chamber is freely connected to the cylinder 59' by alined apertures in the frame and in the bearing'59. Thence asthe rod is vreciprocated in the other direction, a's in the direction of the arrow H of Fig. 1, oil pressure is initially built up v in the pressure chamber to again tightly close the inlet valve and upon further movement opens the outlet valve |13 and forces the oil upwardly through the eduction tube |24 to the upperoil reservoir |15. When the plunger reaches (the end of its travel in the right hand directionga'nd initially starts its travel to the left again, the

oil pressure'in the eduction tube |24' and the initial suction closes the outlet valve |13 to prevent return of the oilintothe pump again. Constant reclprocation of the piston inJthe cylinder 59' insures a substantially constant supply of lubricantl to the upper oil reservoir. Y In order to equalize 'the flow -of ilto the upper level a coil |11, 'see Fig. 5, is provided in the eduction Atube |24. 'Il'liis tends to change Athe pulsations or short spouting action of the oil into a substantially even now. For similar purposes a baille |18` as shown in Fig. 1 may be provided in the eduction tube |24. v

Thus. the present invention 'provides a very efficient pump adaptedto lift the oil from the lower or main reservoir H8 to the top' 24 of the hollow chamber`23'4 for further distribution in' themanner herelnbefore described in detail and doesthis without the expense of a separate 'addi- 'tional pump and in-a manner to insure con'- vfeed .of oil into and through theoperating rods.'

As illustrated in the accompanying drawings the 99 in order to impart machine is arranged yforthisvforced feed to the lower and upper 55 respectively, and this is accomplished vby. merely using the modified plug' |53' illustrated in Fig. Z-A in place of the/'plainplugs |53 and |83 at the-right hand ends of the rods at-presl'lg. 7.' 'I'his modified forni of plug is provided-witha very small inlet Dort |19 andv ent shown in' with a valve4 Ill including an integral bore ISI Lsupportingaspring-|82 adaptedto push a ball |83 against a valve seat |04, with the end of the -b`o're spun overto form a flange |85 adapted t`o --hold the spring and ball in place. These'valves eifectively seat'the inlet ports |19 when the rod looper operating rods 54 and of the inlet holes may be closed sovthat force i'eed alone is 55 is reclprocated in'tlietdirection of the arrow G'in Fig. 7 so that thesuction action of the pump is in no way impeded `and open automatically by oil pressure in the pressure chamber |19 when the reciprocating rod is gi`en a pressure stroke in the direction of the'arrowig. Because the consumption of oil by the various bearings throughout the rods 54 and 551s very light and because it is desirable to have a heavy ow of oilto the top of the trunk, the eduction tube |24 and the valve |13 are preferably made of large size to permit the bulk of oil |20, from ,the pressure stroke-of the pump, to pass upwardly for general distribution, and the inlet ports |19 of the modiiled plug |53' are made extremely small so that there will be just a slight amount of oil passed into the operating rods. The size port may be proportioned to obtain any desired amount of lubricant. Preferably. though; it is proportioned to receive buta slight proportion of the oil moved by the pump'.

= This forced oil feed for the operating rods may be used in conjunction with the gravity feed provided 'by the entrance ports |50 and |50 in thet4 top of the rods 55 and 54 or these oil entrance provided. Further, suitable holes may be drilled through the frame 20 to Join the other operating rods, for example the operating rods 10 and 14 for the feeding mechanism 43 sojthat they in turn may be lubricated by forced feed in like manner. A v

A modified form of pump" |22 of the reciprocating plunger"type\is illustrated in Figs. 5, 1l, and 12, having its Vintegral with a modied bottom plate 25 in such manner that the complete pump may be easily and quickly removedfrom the sewing machine for repairs 'and adjustments by ing the bottomplate.

- In detail, this form of pumpcomprises an inlet valve |01, an outlet valve |13, screwed upon or' otherwise secured to the main body portio v |05 at inlet and outlet-portsl Vlas and m respec veli' and with an intermediate cylinder supporting a plunger |9I. The latter is preferably provided with *a` bore |92 adapted to receive a coil spring |93 for the purpose of lifting the plunger in the cylinder. An outlet valve |13 is connected to the outlet port |89 by a regular pipe coupling |94. The bottoni plate 25', including the pump unit |22, issecured to the suitable fastening screws. Y

' Operation of this form of the invention is pref' era'bly accomplishedby the provision of a linger |95 securedto the lower rocking rod 54 as by a yoke 54'. 'I'he finger overlies the plunger Ill,- and pushes the latter downwardly whenever the rod 54 is given a clockwise movement as viewed the boil from the outlet valve mK toward its seat- 1 ingsurface. Next,-as the plungeris moved downwardly` by the ilnger '|95 the pressure built up thereby forces the ball "seat, and releases the outlet valveV |12 to eifect main body portion I made' merely removhollow chamber 2l by description an .or all of the modes o f its driving connections;

of the inletvalve to its Y a to the lower operating rods, adisplcement of lubricant upwardly through the audace in detail with pump |2|, may be used with this 5 form of pump also, in 'order to have a compara- -tively smooth ilow of oil to the upper distributing points rather than a pulsating or spouting ow. 'A sliding connection |91 is provided between the top end of the eduction tube |24 oil reservoir so that this tube may 'be simply slid out of the hollow chamber 23 with the pump |22 when the bottom plate 25 is disconnected, and vice versa.

A ilnal form of 9. It comprises a circular body member |99 adapted to be passed into a bore |99 in the side wall 65 of theframe 20. v The body member is provided with a pair of bores |99 adapted to reand the upper 10 pump |23 is illustrated in `Fig. 15

ceive a pair of gears 200one being provided with 20 gears are rotated, oil is 2 |23 and of the gears 200 is provided by any suit- 30 able belt 201 or like connection extending to a circular groove 208 section ofthe main' drive pulley. Y

Although this pump provides a very economical construction it is not as7 fool proof and positive 3 in its action as the two novel forms of the pump |2| and |22 hereinbefore described, Vfor the belt 201 may break or slip without the :operator beingaware voi' it and thereby, cause the oilfsupply to fail.

chamber 23 may be provided with an integral glass wall 209 in the'form of a sight and gauge for viewing and checking the conditionvand .the level of the'oil, the latter being accomplished by the 4 vprovision of an oil level line and the same glass being provided with a graduated scale 2| cooperating with a pointer H9 to v indicate the'extent of feed and consequently the number of stitches per inch.A This glass also, in effect, forms a side wall to the hollow chamber.

ItV should be noted that-the novel pump |2|, wherein fa bearing is used as a. pump cylinder "and a, main operating rod serves the ancillary purpdie of a plunger 4for the pump, may be used As illustrated 1u Figs. 5 and 1o the hollow 4 zio on the glossN equally vwell with other machines, and the present 55 d claims are intended to cover such different use. v Other variiltions and modifications may be` made within t tions of the inventionmay be used without others.

-Having thus explained the nature ofour said invention and described a. way of constructing and Y usingthe same, although without attempting to set forth all the forms in u'se, we claim:

1. In a sewing machine the combination of a Y frame; a hollow chamber in said frame; a main ,drive shaft with cranks; lower operating rods with main' .drive shafti meansfforflifting oil-from the bottom of said chamber to the distributor pan; and crank arms connecting said main drive shaft t hollow, through. their length, adapted to receive oil e scope of this invention and por- -60 which it may be made',4 35"- a distributor pan above the 70 from the distributor 1',

l Ylio ing oil to the operatinginstrumentalities and dri!- for liftingoil from the driving connections of the crank armsto thev a main oil reservoir; a main 4drive shaft with cranks; lower operating rods; an upper operating rod; an upper oil reservoir; means for lifting oil from said'rnain oil reservoir and directing it to said' upper operating rod and said lower operating rods, and to the upper' oil reservoir; and a distributor pan overlying said main drive shaft adapted to receivevoil from the vupper -oil reser- -"voir and to direct oil to the cranks on the main driveshaft.

3. In a sewing machine the combination of a framev with a bore in the side wall thereof; a

' main oil reservoir'in said frame; a top plate; a

` main idrive shaft. with cranks; lower operating operating rod and said lower operating rods and 'to rods; an upper operating rod ;.an upper oil reservoir; and a gearpumpsupported in the bore of the frame ior lifting oil lfrom said main-oil reservoir to said top vplatefor. distributing it tosaid upper said upper oil" reservoir; and a distributor pan adapted to receive oil from the upper reservoir and to direct the oiltothe cranks on the main drive shaft.

4. In a sewing machine the combination of a frame for supporting operating instrumentalities and driving connections; means foi` distributing oil to the operating instrumentalities and the driving connections; an oil pump for lifting oil vfrom a low to a high level inthe frame for distribution by said means; anda -looper operating rod in said instrumentalities forming a plunger for said pnmp.v

.5. In a sewing -machinethe combination of a frame for supporting operating instrumentalities and driving connections; means for distributing connections; an oil pump Y a low t'o a.` high level in the framefordistribu-B tion by said means; a bearing in the frame formfing acylinder for the pump; and a reciprocating' rod for lperforming main operatingfunctions in the sewing 4machine supported in said bearing and adapted to perform the ancillary function of a lpiungerfor the pump. y a

6. In a sewing machine the combination of a frame for supponting operating instrumentalities said pressure chambers;

`valves in said rods, controlling the ilow of -lubriand driving connections; means for distributing oil to the operating instrumentalities and driving connections; an oil pump for lifting oil from a low to ka high level in theframe for vdistribution by said means including a pair of main bearings in l said frame adapted to Aform afpr'essure chamber,

for the pump; and a reciprocating main rod in one of'said bearings forming a plunger yfor lthe so I pumpv '1. lIn asewing lmachine the combination of a frame; connected pressure chambersin said frame,. for lubricant; a plurality ofv hollow rods with outlet holes, respectively extending into bearings for said rods;

cant .from said pressure chambers; and means' for reciprocating one of said rods to create a pressure of lubricant in said pressure chambers and concurrently yopen said ,valves and force lubricant therethrough and to-the bearings.

il. Ina sewing machine the combination of a frame' for supporting operating vinstrumentalities and drivinglconnections; a reservoir for-lubricant.; a hollow operating rod for operating a ananas l the rod and main instrumentality1 and to operate the pump.

sewing instrumentality; having` an -oil escape hole; bearings for said rod; means for pumping lubricant from said reservoir; and a valve in said rod associated -with said means to effect force feed of lubricant into said rod, through said 5 escape hole andlto the bearings.

. 9. Ina ng machine the combination of a frame for supporting operating connections; a rocking rod supported by said frame adapted to actuate a main operating instrumentality; a hollow chamberin said frame, forming an oil reservoir; a bottom plate for said hollow chamber; means for distributing oil to the operating ccnnections;.a pump carried by said bottom plate and having a vertically disposed plunger for lifting oil to said distributing means; and a finger on said rocking rod overlying the plunger and adapted -to perform theauxiliary function of operating the pump while the rocking rod performs the nain function of actuating a main operating' instrumentality.

10. Ina sewing machine the combination of a frame; a hollow chamber; a bottom plate forsaid chamber; a drive shaft; a crank on said drive shaft; an operating rod for a' main operating in-J25 strumentallty; a pump on said plate; means having only one connection to only one crank on the main driv'eshaft adapted to concurrently operate the Dump. 30

11. In a sewing machine the combination of a frame; a hollow chamber in said frame for sup-l porting operating instrumentalities and forming an cil chamber; a top to 'said hollow chamber; a

l horizontally disposed 'glass plate carried'by said 35 l top; conduit means for directing oil from said oil chamber to the underside. of said glass plate; and means for pumping oil from the bottom Iof said chamber through said conduit means and expelling the same against the underside of said glass plate 40 to diffuse .and to distribute the oil to -said operating instrumentalities. v

. l2. In-a sewing machine the combination of a frame; an oilreservoir; means for distributing oil to operating instrumentalities; an oil pump forni? ,moving oil froml said reservoir to said-means; and

a main operating rod for performing a main oper ating function and cooperating with said pump' to perform the ancillary function of a plunger for 60 13. In a sewing machine the combination of a frame; an oil reservoir; means fordistributing oil to -operating instnimentaliti an oil pump formoving oil from said .reserv ir to said means; a' bearing in said frame forming a cylinder for said 55 pump; and a reciprocating rod for performing a main operating function, supported in and cooperating with said bearing to perform the ancillary function of,a plunger for the pump.4

1`4. Ina sewing machine the combination of a 00 frame; a hollow chamber in said -frame forming a main oilfreservoir; a top for said chamber; an oil directing vane on said top; a main drive shaft with cranks; means for lifting oil from said raserv voirand educting it against the underside of the 65 top for partial distribution Vby said vane; anV upper 'oilre'servoir near the point of eductionadapted to l collect oil which drops from the top; a distributor pan overlying said main drive shafts; ja plurality of-spouts in said distributor pan overlying indi- 70 vidual cranks on the main drive shaft; and means for cunziucting oil from said upper'oil reservoir toy -said distributorpan.' 15. In a machine the combination o f a frame; a hollow chamber in said frame forming 76 a main-oil reservoir; a top for said chamber. having .an openingthrough which the ow of oil may be observed; a glass insert forming a closure for said opening; an oil directing vane on said'top; a main drive shaft with cranks; means for lifting oil from said reservoir and educting it against the underside of the top for partial distribution by said vane; an upper4r oil reservoir near the point of eductionv adapted to collect oil which drops from the top; a distributor pan overlying said main drive shafts; a plurality of spouts in said distributor pan overlying individual cranks on the main drive shaft; and means for conducting oil from said upper oil reservoir to said distributor pan.

frame; a hollow chamber in said frame forming a main oil reservoir, having a side wall opening l against the underside of theftop for partial distri- I reservoir to said distributor pan.

bution by said vane; an upper oil reservoir near the point of eduction adapted to collect oil which drops from the top; a distributor pan overlying said main drive shafts; a plurality of spouts in said distributor pan overlying individual cranks on the main drive' shaft; and means 'for conducting oil from said upperoil reservoir to said d istributar pan.

17. In a sewing machine the combination of a frame; a hollow chamber in said frameV forming a main oil reservoir; a top for said chamber;` an'oll directing vane on said top; a main drive shaft with cranks; lower operating rods having oil entrance apertures; channels in said chamber for conducting oil' to said oil entrance apertures;

means for lifting oil from said reservoir and.

educting it against the underside of thetop for partial distribution by said vane; an upper oil reservoir near the pointof eduction 4adapted to collect oil which-.drops from the top; a distributor pan overlying said main'drive shaft; a plurality of spouts in said rdistributor pan overlying individual cranks on the main drive shaft; and means for conducting oil from said upper oil reservoir to said distributor pan'.

18. In a sewing machine lthe combination of a frame; a hollow chamber in said frame forming a main oil reservoir; a top for said chamber; an oil directing vane on said top; a. main drive shaft with cranks; lower operating rods having oil entrance apertures;I channels in said chamber for conducting oil-to said oilentrance apertures; a- -pump\ for lifting oil from said reservoir and' educting it against thev underside ofthe topforv partial distribution by said vane; a reciprocating rod for performing main operating functions in` the sewing machineand adapted to perform the ancillary f ction of a plunger for the pump; an upper oil r servoir 'near the point 'of eduction adapted to collect oil lwhich drops.from the top; a distributor;l pan overlying said main drive-shaft;

'a plurality of spo'uts in said distributor pan overlying individual cranks on the main drive shaft; and means. for conducting oil from said upper oil 19. In a sewing machine thecoinblnation'of-a; frame; a hollow chamber' in saidA frame forming ,I amain `oil reservoir; a top Afor Vsaid chamber; a main drive shaft'with cranks; and .upper main operating instrumentality'disposed remotely from 16. a sewing machine the combination of a underside of the top; means for conducting a part 5 of said educted oil to said upper operating instrumentality and said lower instrumentality; an v upper oil reservoir near the point of eduction adapted to collect oil which drops from the top;

a distributor pan overlying said main drive shaft 10 a plurality of spouts in said distributor pan overlying individual cranks on the main vdrive shaft;

and means for conducting oil from said upper oil reservoir to said distributor pan.

20. In a sewing machine the combination of a 15 frame; a hollow chamber in said frame forming a mainoil reservoir; va top for saidchamber; an oil conducting vane on said top; a main drive shaft with cranks; an upper operating rod disposed remote from and above said main drive 20 shaftand having an oil entrance aperture; lower operating rods disposed below the main drive shaft and having oil entrance apertures; channels in said chamber for conducting oil to the oil entrance apertures in said upper and lower cperat- 25 ing rods; means for'lifting oil from said -main reservoir and educting it against the undersideof said top for partial distribution by said vane to said channels; an upper oil reservoir near the point of eduction adapted to collect oil! which 30 drops from the top; a distributorpan ovierlying said main drive shaft; a plurality of spouts in said distributor pan overlying individual cranks on the main drive'shaft; and means for conducting oi1 from said upper oil reservoir to distributor pan.

21. In a sewing machine the combination of a frame for supporting operating connections; a rocking rod supported by said frame to actuate a .main operating instrumentality; a. hollow means for distributing oil to the operating con-yvnections; a pump in said hollow chamber havin a plunger for lifting oil to said distributing means; and a nger on said rocking rod overlying the plunger and adapted to perform the auxiliary-.function of operating thel pumpwhile onsaid drive shaft; an operating rod for a main operating instrumentality; a pump in said hollow chamber; and means having only one connection to only one crank on the main drive slPaft adapted to concurrently operate the rod. and main instrumentality and to operate the pump. v

23. In-a sewing machine the combination of .a

frame for supporting operating instrumentalities anddriving connections; a reservoir for lubricant; a. pressure chamber in said frame in communication with said reservoir; a hollow operating rod for operating a sewing instrumentality, having an oil escape hole and extending into said said 35 40 chamber 1n said frame, forming an oil reservoir; f

pressure chamber; a bearing for' said rod; a valve 65 in said rod controlling the flow of lubricant from the pressure chamber; and means for reciprocating. said hollow rod' to draw lubricant from said reservoir and into said pressurechamber and to force the same into the` rod and' through the 70 escape hole .to the bearing. i

JOHN P. wm's.

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