US2384509A - Sewing machine - Google Patents

Description

sept. 11, `1945.

N. F. TowNsEND Erm.

SEWING MACHINE Filed May 28, 1942 2l sxieets-shet 1 INVENToRs /Varmqn E Townsend wnc/s l? Wymburro N. F. TowNsEND r-:TAL

SEWING MACHIE sept. 11, 1945.

Filed May 2B, 1942 2 Sheets-Sheet 2 Patented Sept. 11, 1945 2,384,5oaffeg i SEWING v Norman F. Townsend, Port Chester, and Francis4 P. Tamburro, Ozone Park,.N. Y., assignors to f Willcox &' Gibbs Sewing Machine Company, New York, N. Y., a corporation of Ne `w York AApplication May 2s, isiaseriaiNo. 444,852

This invention relates `to sewing .machinesand especially to feature relatingfto the lubrication thereof. i

It is an object of the invention to provide a sewing machine in which ready access may be had for the jc isassembly and/or Av repair of L5 vision of a sump adaptedto be clamped and. maintained relative to an opening in a'sewing machine frame in a very effective manner; a cover or cap plate serving to ectively maintain a lter or seepage member in proper association with the sump and with a conduit extending to 'the sump; simple and'eectivenieans' for Sacilltating a visual'determ'ination of thelubri cant level in the sump; means serving toprevent the adverse escapev of lubricantbetween the sewing machine frame and a removable sump associated therewith; and means serving to"pro' vide for the ready and unimpeded Vliow of ltered lubricant into a conduit extending to the sump.

Other objects, features and advantages will hereinafter appear.

In the drawings: Figurel is a fragmentary view, partly in sec,-Y

tion, of a depending and lower arm portion of a i sewing machine frame, taken substantiallyon the line I-l of Fig. 3. l Y

Fig. 2 is a detailviewshowing a cap'or cover member the combination embodying the present invention. Fig. 3 is a sectional view, taken on the line 3-3ofFig.4. y f

Fig. 4 is a top view of the sump. f 1 Fig. 5 is a sectional view taken on the line 57-'5 ofFig.3. Fig'. 6 is a sectional view takenonthe line 6-6 ofFig. 3. Fig. 7 is a sectional view, similar yto Fig. '3, but showing` a modication yof' the 'present invention;

lwhich willhereinafter appear, include the pro-f` i tional 'View taken on the line 8-8 fliiig'qg.; .-"rr I "'-The' presentV inventionisapplicable-to sewing machines of-"divers'types, but itlis particularly-'advantageou's' when `'applied to a`sewing machine of the typevdisclosed in thev Arthur A. MerrittlrPatent 1,041,652 :andin ourcopending application Serial. No. 309,362, .led December 15, 41939,-now Patent No. 2,299,439, granted October 2,f1942..; f

- :i Thus," referring lmoreparticularly to the draw-v ings,'1iand rsti'to Figs. 1-6, there. is'shown for thel purpose oi` illustrating Vtheinv'ention a portionaofasew'ingfmachine-of the above-mentioned .type including a mainframe 2| with a depending hollwzarm. portion 22 in which are located operatinginstrumentalities23; and. to which, as by -aplura'lity of bolts' Zilfand 25, isI secured av lower .armr portion 26* in z which other operating instrumentalities, notshown, are located. Reference is -made to: .our copending` 'application Yand totheArthur 1A. Merritt patent, botnreferredto above, lfora more complete understanding `of ,the detailsoi' general'construction and operation of asewing machineof the type shown izo-illustrate 'the rpresent invention. OI' importance, it'istol benoted that av cut out or opening 2l is provided in the under part 4of* 'thei end :orthe lower-'arm 2o underlying the depending: vportion 221 irom;which there extends aiconduit .28 leading; as" shown diagrammatically in Fig. 1,! .to 'a' suita'ol'e.- lubricant pump P, and fron'iithencethrougn a duct D, toy divers operatinginstrumentalities to be lubricated such, for example, -as 'the operatinginstrumentanties 23 irr the `depending arm. Amore complete illustration" oi' the relation of.- a` conduit such as the conduit 28, Ito lthe lubricating-system ola sewing machlneisprovided 'in ourraten't No. 2,289,- 439. and reierenc'e-''thei'etoisV here made.

Servingfas la'closurefplate for the opening 21 in.tne1lowera'rm is a sumpf which, as shown, is trouglnikein shape, and has side walls r3u and SI1 and an4 outer end wall 32', adapted -to en-v velope the 'end portionof the `lower-arm around ythe-openingfan'dto, extend-'upwardly beyond the juncture of the depending and "lower arms as best-shown in Figs# l and' *At its inner end 33, wnichfis open" and which underlies theiower arm at a location spaced to the left of the lower arm 'opening' as view'edfih Fig. 3, the-suxnp is formed with 'channel or groove 34 therein adapted to receive f a 'gasket 3 5' v jf c ork orY other suitable material, :an'dpress vor rseat the* latter snugly againstthe bottom'and sides of the lower arm and thus provide an effective seal against the escape of lubricant at that point. Preferably, and as shown, the upper ends of the channel at opposite sides of the sump, terminate in gasket conning walls 36.

Advantageously and as shown a flared portion 31 of the lower arm, terminating at its free end contiguous opening 21 in a rib 38, isformed to oppose in spaced relation an inclined portion 39 of the sump extending from the channeled in-V ner end 33, whichconstitutes a sealing section, to a bottom portion 40 thereof underlying the lower arm opening.

Formed on the outer end posite sides, are two pairs of riblike lugs 4| and 42, having upper seating surfaces spaced down,-

wardly from the upper extremity of the outerk vvvalljrf o! and projecting toward the interim-,thereof at op y' pushed downwardly in position it is snugly held in place, serves as a means for maintaining the filter 53 clamped tightly against the bottom portion of the sump, and forms with the filter and with the bottom portion of the sump an enclosed lubricant chamber 56 from which is effectively excluded dirt and other foreign/matter which would' impair the effectiveness of the lubricant. Moreover, to facilitate the iiow of lubricant into vthe conduit 28, the latter is formed with an angularly extending side opening 28' at the free end thereof.

' Also'of importance,V and as shown best in Figs. 1 and 2, the cover plate 54 is formed with a depending nger 58 adapted to rest on the bottom portion 40'o'f the sump adjacent a glass closed end wall 32 and adapted to underlie and engage seatingsurfaces 43 and 4,4,.ofa1luglike formation 45 at the outer end wall of the lower ar m- ,And, of importance,` intermediate the pairsof riblike lugs 4Iand i42, and the channelled inner end 33 thereis provided a clamping means by which the sump. maybe Vdrawn firmly into a clamped and secured position relative to the lower arm and eiectively close .the lower arm opening.

This `clamping means, vas shown, includesa pair of bolts 41 and 48 respectively passed upwardly throughthe bottonnof the sump, through apair of suitably bored upstanding lugs 49 and 50 and into .threaded bores in .a pair of lugs 5I and 52 kformed on opposite sides of and extending laterally towards the interiorv of the lower arm 26 adjacent the openingll. .With this construction, it will be readily appreciated, when the bolts 41 and are tightened, the channeled innerend 33 of the sump, constituting the sealing section thereof, is drawn upwardly with the riblikelugs t preciated that. the upward extending .side and outer end walls 39, 3| and 32 respectively, provide effective barriers against the adverse escape of lubricant.k .A

It will be understood thatas in our Patent No. 2,299,439, lubricant from the lower and depend.- ing arms will be collected in the sump. It is intended in the operation of the lubricatingsystem of a sewing machine embodying the present in,- vention that thelubricant pump and the oil supply be so regulated that the level of lubricant in the sump shall be maintained in a. position no higher than and preferably somewhat below the channeled inner end 33 of the sump. Y

In order thatthe lubricant Vcollected in the sump may be properly filtered before being drawn back tothe lubricant pump anddistributed to operating instrumentalities, a generally cylindf dricallter 53 of felt; orthe like is disposed to rest on the bottom portion!!! of the, sump and to extend upwardly around and be spacedlaterally from the lubricantconduit 2,8.,Y And, of importance, ythere ris provided ,a cover plate 54, having a hole 55 therein for receiving and closely sight opening 59 provided in the side wall of the sump. This linger 58, which advantageously may be colored to readily contrast with the lubricant, thus serves not only as a stop or support :or the coverV plate, but also serves as Va lubricant level indicating gage which may be observed through the sight opening. If desired, and as shown in Fig. 2, suitable indicia may be provided on the finger to further facilitate the ready determinationv ofthe' lubricant in the sump.

In Figs. 7 and 8 a modified form oi' the invention isshown, which in'all particulars except as pointed out hereinafter, is exactlyV the same as that formof the invention illustrated in Figs. 1 6 and described above. V Y

This modified form of the invention diilers from the form iirst described in providing' a construction wherein the gasket at the inner'end of the' sump may be eliminated andyet a very effectivebarrier provided against the adverse escape oflubricant at that point.

Thus, with the modified form, the sump is formed with a modined open inner end Bl! formed, instead of with a gasketereceiving channel,l with a ange 6| `projecting toward the lower arm, and adapted tobe received between a pair ofA beads 82 and 83formed on and extending under and up the sides ofthe lower arm. As in the case of the construction first described, when the clamping means istightened the inner end of the sump is drawn firmly toward the lower arm. Thus, in

, the modified form, when the clamping up operconfining the conduit 28, and adapted to overlie the filter 53. Y n y Advantageously, andas shown best in Figs. 2 and 4,this cover plate 54 is so shaped and provportioned perimetrically that it snugly fits inpthat portion of the sump laterally defined by the pairs of riblikelugs 4| and 42,v and bythe upstanding lugs 49 and 50. Thus, when the cover plate is ation is completed the flange 6| is disposedand securely held in position between the beads 62 and B3 on the lower arm. 'Advantageously and as shown, a plurality of spaced projections' 54, G5 andv 66 are formed on the flange 6| to directly engage the lower arm and tend to insureY a uniform or equally distributed seating relationship of the inner end of the sump andthe lower arm. With the modied construction, it is thus seen, and as shown best in Fig. 7, the lower arm bead 63 interiorly of the sump, serves as a baille to lubricant mist within the sump. Similarly the iiange 5|,projectons64, 65 and 66 and bead 62 serve as bafiles to the lubricant mist." And, since the lubricant is maintain'edat a level below the inner end of the sump, asY by proper control of thelubricant pump and supply, there is no danger of a mass ow of lubricant past the bailles above described and apractcal seal against the escape of` lubricant is provided. n

Importantly, with each of the illustrated forms of the invention it is to be noted that the' upper faces of the lugs 49 and 50 associated with the clamping bolts, are disposed upwardly above the intended maximum levelI of lubricant in the sump so that lubricant cannot adversely seep down the bolt holes therein alongithe bolts and. out of the bottom of the sump'.v4 I n 1 i' l Hence with both illustrated `forms of the invention, a lubricant sump is provided, whichis adapted to be readily removed or replaced relative to an opening in a sewing machine frame to facilitate access to devices in the frame; which is adapted to effectively prevent the adverse escape of lubricant; which supports' and includes in organizational association therewith advantageous lubricant ltering, shielding and indicating means; and which cooperates with special interrelated means and a conduit for conducting'lubri: cant to a pump and divers operating instrumen,- talities, in providing` a lubricant chamber effectively guarding against the associationoiioreign matter with the lubricant to be drawn into the conduit.

Other variations and modifications may be made within the scope of this invention and portions of the improvements may be used without others.

I-Iaving thus described the invention, what is claimed as new is:

l. In a sewing machine the combination of a frame having an opening; a cover plate for said opening having a portion thereof forming a pivot section for engaging the frame and a sealing section spaced therefrom; and clamping means disposed intermediate said pivot and sealing sections for causing the cover plate to pivot about the pivot section and move the sealing section into sealing relation with the frame.

2. In a sewing machine the combination of a frame having an opening and at least one boltreceiving means within the eld of said opening; a cover plate for said opening having a portion thereof forming a pivot section for engaging the frame, a sealing section spaced from the pivot section and a bolt-receiving section; and bolt means in said bolt-receiving section for causing the cover plate to move about the pivot section to bring the sealing section into sealing relation with the frame.

3. In a sewing machine the combination of a frame having an opening; a sump for covering said opening; securing means for the sump disposed only intermediate the ends of said sump for clamping the sump to the frame; a lubricant conduit; a seepage member of brous material resting in said sump and surrounding said conduit; and a plate having a port accommodating said conduit and covering said seepage member, said plate being held against inward movement and pressing the seepage member into engage ment with the bottom of the sump when the securing means moves the sump into clamping relation with the frame.

4. In a sewing machine the combination of a frame having an opening; a sump member having a pivot section for engaging the frame and a spaced seal section with a generally upwardly facing channel; a gasket in said channel; and means disposed intermediate said sections adapted to concurrently move said sump member about the pivot section and to clamp the gasket between the frame and the channel in the seal section of the sump.

5. In a sewing machine the combination of a frame having an opening; a closure plate for said opening, providing a lubricant sump; opposed seating portions on said plate and said frame, located adjacent one end of said plate; a pair of clamping members extending through said closure plate: and into. association.-withsaidY frame; said. members: being Lflocated :fintermediate-,soppof-L site ends of said plate; .supporting v1ugsfior;;said members,- on-said=closureiplate 'a 'conduit for. conducting lubricant from .said sump to an operating instrumentality in saidrframe; a lter in` said sump encirclingsaid1conduit.;.,and a cover plate, overlyingsaid filter and through .which saidconduit extends, wedged in said sump intermediate said supporting lugs and theseating-.portionsfat Oneend thereof, 1 i., i

6,. vIn a. sewingmachine the combination of 1,a frame havi1 1 g anopening.in the under `portion thereof :et zone end; a froughlike closure, 1.11am-, ber, providing alubricant sump, and having a closed ,outer and anopen inner end,said.closed endwvextending lupwardlyto overlap said frame adjacent said'fopening;rjseatingl,means on said vclosure member, `adjacent*said-closed endl and spaced downwardly from the' upper extremity thereof for .engaging the frame; means on said frame, opposed to said seating means; and screw means, disposed within said sump intermediate said seating means and inner end for holding said closure plate to said frame and for moving said closure plate with said seating means as a pivot to draw said open inner end up into clamping relationship with said frame.

7. In a sewing machine for combination of a main frame having a sump with a transparently closed sight opening therein; a. conduit extending to said sump; a iilter member in said sump, encircling said conduit; a cover plate on said filter and through which said conduit extends; and a depending linger on said plate, visible through said sight opening, supporting said plate relative to said sump and adapted to serve as gage of the level of lubricant in said sump.

8. In a sewing machine the combination of a main frame having a sump with a wall; a conduit extending to said sump, for conducting oil to an operating instrumentality in said frame; a filter member on said wall in said sump, encircling said conduit; a cover plate on said iilter and through which said conduit extends, defining with said wall and filter a foreign matter excluding chamber for lubricant for said conduit; and a depending finger on said plate for engaging and supponting the latter relative to said sump.

9. In a sewing machine the combination of a frame having a sump with a wall and having a transparently closed sight opening therein; a conduit for lubricant, extending to said sump; a lter member on said wall in said sump,y encircling said conduit; a cover plate on said iilter and through which said conduit extends; and a depending iinger on said plate, visible through said sight opening, of a color contrasting with that of the lubricant, and adapted to facilitate the determination of the level of lubricant in said sump.

10. In a sewing machine the combination of a frame having an opening; a sump adapted to close said opening, having a closed'outer and an open inner end; opposed seating means on said frame and sump adjacent the outer end of the latter; a bead on said frame; a ange on said inner end, adapted to overlap said bead; and clamping means for drawing said sump relative to said frame, with said opposed seating means in engagement and forming a pivot and with said flange clamped to said frame and in overlapping relation with respect to said bead.

11. In a sewing machine the combination of a frame with an opening therein; a sump adapted toclose said opening,A said sump having a seat.- ing section and a clamping section spaced beads on said'frame; a flange on said clamping section; and means in said sump intermediate said seating and clamping sections; for drawing said sump relative to said frame and moving the clamping section about the seating section as a pivot and clamping the ange to? said framev intermediate said beads. Y Y i' f 5 12. In a sewing machine the 'combination of a. frame with van opening therein; a sump adapted to close said opening, said sump having aseating section and a clamping section; a bead on said frame; a plurality of spaced projections on said clamping section', projecting towards said frame; and means 4in the sump intermediate said seating and clamping seotionshfor drawing said sump about the seating ,section and relative to said frame with said projections clamped rela-A tive to said frame and in overlapping relation with respect to said bead.

13. In a sewing machine, the combination of a. frame having an opening in the under portion thereof at one end; a troughlike closure member for said opening having a closed outer end extending upwardly to overlap said frame adjacent said opening and an open inner end, said troughlike closing member providing a lubricant sump for the machine,v the closure member having inwardly projecting means on its closed .end for engaging the bottom oithe frame; and draft means intermediate the inner and outer ends for causing the closure member to pivot about the closed end and move the open end into abutting sealing relation with the underside of the frame. y

NORMAN F. TOWNSEND. FRANCIS P. TAMBURRO.

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