Jan. 14, 1947. o. -Quls-_r 2,414,168 SEWING MACH-'INE - original Filed Der? 3b, 1959 4 sheets-sheet 1 äâ,È RN, `N \W m .N sfl».|- . NN «l /NÑ . . , _Nm ,wg ., _S, , àM \ à A» . , WMM \\H NN, MW «Sì mmäm, «NNswS@.ÈÈëwwwNÈÑN, mm» m. MN Ñ ß m. WKN NÑNN -,„Nää NäQM.NW,Ql. „1%. -...M.- mw L E*,ÈN«.NßìI. ë. INVENTOR BY ATTORNEY ` Jan. 14, 1947. Q_ QUls‘T » »2,414,168 SEWING _MÀCHINIE Original Filed Dec. 30, 1939 4 sheets-sheet 2 \\\\ \ in #ENl@ \\\ ` BY ’ INVEÑTÓR . ATTORNE ` Jan. 14, 1947. O. QUIST 2,414,168 ` SEWING MACHINE Original Filed Dec. 30, 1959 4 Sheets-Sheet 5' J'YGLZLZ 103 f INVENTOR ¿PMM/7*á ._ ATTOR Y ' Jan. 14, 1947. O. QUIST SEWING MACHINE Original Filed Deo. 30, 1939 2,414,168 4 Sheets-Sheet 4 INVENTOR. BY î“ C’ ' ATTORNEY Patented dan. 14, 1947 2,414,168 UNITED STATES PATENT OFFICE 2,414,168 SEWING MACHINE Oscar Quist, Chicago, Ill., assignor to Union Special Machine Company, Chicago, Ill., a cor poration of Illinois Original application December 30, 1939, Serial No. 311,722, now Patent No. 2,345,992, dated April 4, 1944. Divided and this application February 26, 1943, Serial No. 477,189 3 Claims. 1 (Cl. 112-237) This invention relates to sewing machines, and more particularly to mechanism provided in such machines for lifting a presser foot which is ar ranged to retain work against a .base or other work support. The present case is a division of application Ser. No. 311,722, ñled on December 30, 1939, now Patent No. 2,345,992, granted April 4, 1944. An object of the invention has been to provide sim-ple but effective, conveniently located, and readily operable presser foot lifting devices in a machine which is substantially completely en closed to facilitate lubrication. The invention is especially concerned with a machine having a hollow frame comprising a base or work supporting member, a vertical standard and an overhanging arm, carrying a needle head at its outer end. The needle head is equipped with vertically movable needle and presser bars. A part of the setting for the invention is the pro 20 2 base beneath the work support. Suitable connec tions are provided for rocking said member by a foot treadle or the like. Other` objects, features and advantages of the invention will appear from a detailed description of an illustrative embodiment of the same which will now be given in conjunction with the accom panying drawings, in which: Fig. I is a view in vertical longitudinal section of a lock stitch sewing machine embodying the present invention. Fig. II shows the machine in top plan. Fig. III is a horizontal section taken in a plane below the level of the work support of the ma chine. Fig. IV is a view partly in elevation and partly in cross section, taken as approximately indicated by Athe angled arrows in Figs. I and III, with the cover of the needle head removed to expose the Parts at the interior, and vision of means within such a machine for dis tributing a ñne mist or spray of lubricating oil Fig. V shows the machine in rear end elevation with portions broken out and shown in section within the hollow frame and delivering said oil to better illustrate important details of the trame to various operating parts including the mecha construction. nism` in the needle head. Another feature is the With refernce ñrs-t more particularly to Figs. provision in such a machine of a presser bar lift I to IV, it will be observed that the machine ing mechanism including a rock shaft extending chosen for exempliñcation of my invention has a longitudinally through the interior of the upper, hollow work-supporting base I with a top wall 2, hollow arm. Connections are provided from one front and rear side walls 3 and 4 and ends walls end of the rock shaft, within the needle head, 30 5 and 6. The hollow 'I of the base l is closed at to the presser bar and connections are provided the bottom, with interposition of a sealing gasket adjacent the other end of said shaft, at or near 8, by a removable cover plate 9 and is employed the hollow standard, for imparting a rocking as a sump for oil which is normally maintained movement to the shaft whenever it is desired to at the level indicated at L. Rising from the base lift the presser bar. As a special advantageous I at one end is a hollow standard I0,`which, at feature of this construction, the connections for the bottom, communicates directly with the operating the rock shaft include a lever which is chamber -I and with which is integrally formed a passed through the wall of the upper, hollow arm hollow arm II. As shown, the arm II over at a recess in the latter adjacent a bearing for reaches the base I and terminates at its free end the inner end of the shaft. 40 in a hollow head I2. A crosswise partition I3 Another object of the invention has been to isolates the hollow of the head I2 from the: hol provide an enclosure for all of the moving parts low of the arm Il, which latter, at its rear end, of the machine, except those acting directly upon communicates directly with the hollow of the the work being sewed and those requiring ma standard I0, as best shown inY Fig. I. Extending nipulation from the outside, and to place these longitudinally through the arm II and journaled in protecting recesses, so as to avoid projections, in bushings I5 and I6, set, respectively, into the particularly of moving parts, which might cause partition I3 and the rear wall of the standard injury to the operators or with which the work IU is a rotary shaft I’I. As shown, 'this shaft I1 might catch and become torn. Toward this end protrudes to the exterior of the frame arm at its the means for operating the lever connected with right hand end and at its outer end carries a the rock shaft includes a thrust bar extending combined hand and belt wheel I8 by which the downwardly from said lever through an opening machine may be operated either manually or un in an overhanging portion of the work support, der power. and attached at its lower end to a rock member Conñned to axial reciprocation in bushings I9 mounted in a recessed or set-in portion of the 55 and 20, respectively, at the top and bottom of the 4 3 hereinbefore referred to. An arm 16 von the left hand end (Fig. III) of the `regulating shaft 'l5 is head I2, is a bar 2|, which, at its lower end, car ries a needle 22. Through a link connection 23 with a crank pin 25 on a disk 26 at the end of connected by a “lazy” bar ‘H to a stud 'I8 on the sleeve member of the telescopic link lll. At the shaft Il within the hollow of the head I2 the needle bar 2l is given its reciprocating motion. Rotation of the needle bar 2l within its bearings is prevented through engagement of the outer end of the lower pivot pin 2ï for the link 23 in a vertically-grooved guide 28 interiorly of the head l2. From Fig. I it will be noted that the drive -shaft l'l also has journal sup-port in a sleeve 29 set into a pendant bearing lug 30 Within the hol low of the needle arm H. As shown in Fig. III, the end wall 5 of the base is` angularly recessed as .at 35 to accommodate the loop taker of the its right hand end beyond the bearing lug 45, the shaft 'E5 is provided with another» arm 'i9 which is urged counter»clockwise, as viewed from the right in Fig. III (see also Fig. V), by a torsion spring Se and against which the inner end of an ,I adjusting rod 8l abuts. As shown in Fig. V, the rod 8i has a screw-thread engagement with a lug 82 within the base l and extends at an inclination through the front wall of the standard It to the exterior. At its outer end the rod 8i is provided v: with aknurled manipulating head $3. machine, which, in this instance, has the form of For fur ther details as to the arrangement and operation of the rod 5l and other parts of the feed regulat a rotary hook 36 and which cooperates with the ing means, reference may be had to the patent needle 22 beneath the work support 2 in stitch to Sauer and Smith, No. 2,035,508, granted on formation. The rotary hook 35 is secured to the protruding end of a shaft 3l which extends 20 March 31, 1936. Lifting and lowering movements are imparted to the feed dog 5e from a crank 85 through> a bearing sleeve 5t ñXed in the end wall at the outer (left hand) end (Fig. III) of- the 5A of the base. Within the chamber '1,` the sleeve lower shaft dâ, said crank being connected is supported in a bearing lug 39 pendant from the through a Vertical link 85 with a curved depend top wallI 2- of the base (see Figs. I and III) while ing arm 3l (Fig. IV) on the carrier 55 for the 25 theinner end- of the hook shaft 3l' extending be feed dog 5G. The construction ‘and operation~ of yond the> sleeve is journaled> in a shorter sleeve cr the entire feed mechanism just describedl is sub bushing 33a set into another pendant lug ¿iii stantially identical with that disclosed> in the Within said base spaced from the lug 39". Through above-mentioned Sauer and Smith patent, to aV pair of intermeshing spur gears ‘il and 132», the Yhook shaft 31 is driven from a rotary shaftV 43 which extends longitudinally of the chamber 'l and which is journaled in bearings, respectively, providedA by the end wall 5, the lug 3i!Y and a web projection ¿i5 extending forwardly from the rear which reference may be had for details if found necessary. In its feeding action, the dog 53 reacts with a presser foot 98 pivotally connectedA to a shank member 9i at the lower endV of a presser bar 92. Wall 4 within the base. By means of a train of 35 As shown in Fig'. IV, thepresser bar QE'eXtends up through a bearing in the bottom of the needle intermeshing spur gears £6, fili andy 48 within head l2, and, within the hollow of thel'atter, car .the hollow of the standard I9, the lower shaft 4?. ries a collar eti against which the lower endl of a isA driven from the upper shaft Il in the same di helical compression spring 951 bears.`y At its top, rection and at the same speed. It is, however, to be noted that the ratio of the spur gears 4|Y and 4 40 the spring 95l abuts the upper bearing- sleeve 96 for the rod S2, which sleeve is threaded'for adjust 42„ is such as to impart two revolutions to the ment in the needleihead i2 so-that the pressure hook shaft 31'for each revolution ofthe upper of the spring may beregulated- as desired or re shaft Il from which the needle bar Z‘l is` actuated. The feed mechanism of the machine includes a feed dog 5f', the teeth of which operate upwardly »f through slots 5l in a throat plate 52 set into the inner end, of a` cut-outY 53> in a cover plate 54, which is in. turn set into a depression 55 in the upper surface of the top wall 2 ofthe base l' at the front end of the latter (see Figs. I, II' and IV). From Fig. IV it will be observedi that the feed dog 5il‘ is secured, with capacity for vertical adjustment, to a carrier 5t having; a cylindric shank which extends inwardly through a clear ance opening 5l' in the longitudinally offset por tion 58 of the end wall'5 of the base I.` The inner end' of the, carrier bar 55 is secured by set screws 59j'in a socket member 6U having a transverse boss El (see also Fig` III) in which a pin 62 is in turn secured for pivotal connection to the top of a 60 rocker 53; This rocker ëäreaches upwardly from a> rock shaft t5 journaled' at its. opposite ends in bushings 65 and (il, respectively, set into the end wall 5 of the base and into the laterally offset por tion, 63 of the. rear wall li'. Also secured to the rock shaft t5. within the chamber ‘l is an up wardly extending arm S9, which, through a tele scopic link 7G, is connected to the strap 'H of' an actuating eccentric ‘l2 on the shaft 43. Under the quired. . l InY order that the presser foot Silmay be raised to facilitate` insertion of the work'beneath it ini“ tially, there is provided a con-trol mechanism in« cluding» a shaft el within the hollowef the over hanging arm I'lv, said- shaft being journaledA at its opposite ends in» the- partition I3- and in the lug t0, respectively». The left hand end of the» shaft 9T (Fig. I) extends‘through the partition I~3-into the- hollow of the needlehead l2 and there has an arm- 98» (Fig. IV), which, through a link-*93, is connected to a collar 93a which» is slidable on the presser bar, and which- is normally spaced from the lower face of the collar' 53, so that dur ing the operation- of the-machine,v the presser bar. is subject» only> to the influence of the spring 95; A torsion spring E00 surrounding-theend» ofr the shaft 91"! within the head l2 tends to rotatesaid shaft clockwise in Fig. IV and through .the~ link 99> causes theloosely mountedA collar 83a. onr the presser bar B2 to be normally heldv in its lower po sition in engagement with the bottom of the needlehead I‘Z- and away from-collar 93; Secured tothe shaft 9T within a lateral recess. l-Dl- in, the lug 3€) in the hollow of the frame arm I l~ (Figs.l I, II and V) , is an opera-ting lever H32- which reaches influence of the eccentric l2 andthe interposed 70 outward from said armv forv connection to» a pendant link rod HB3. 'I’hisV link rod» |03- passes parts just described; horizontal feeding move through a guide holev in the work support 2- and isl connected» at its lower end to oneY extremity of a motion translating lever- |95 fulcr-umed- on» aY ' dog 5@ includes a regulating shaft ‘l5 (Figs. III andV) which is journaled in the lugs 39 and 45 75 fixed- stud> let which extends outward from the ments are imparted to the feed dog 55j. The means for regulating the feed throw ofthe feed 5, inwardly recessed portion |61 of the rear side wall 4 of the base I. The other extremity of the lever |05 is engaged from beneath by a pad at the top of the thrust rod |08 which may extend to an actuating knee press or foot treadle, not illus trated. Due to the lateral recessing of the side wall 4, it will be seen that the presser foot con trol connections are kept within the eonñnes of the work support 2 with consequent avoidance of projections therebeyond. - i As previously pointed out, the hollow of the base | of the machine is utilized as an oil sump. For the purpose of circulating the oil within the machine to lubricate the various enclosed parts, the oil is lifted from the supply as a consequence of the dipping thereinto of the gear 46 on the lower shaft 43‘. The oil thus lifted is further carried up by the gears 41, 46 and, by the high speed rotation of the latter; dispersed in the form of a mist within the hollow of the standard I0 and the connecting hollow of the frame arm II. Some of this dispersed oil finds its way into a pocket ||0 (Fig. I) at the top of the right hand end bearing I6 for the drive shaft I1 and is con ducted through a port III to the shaft surface within said bearing, any excess oil being returned into the base by way of a duct |I2 at the bottom of said bearing. Part of the dispersed oil is also caught by the open rear end |I3 of a tube ||5 which extends horizontally `forward within the hollow of the frame arm I I and through the par tition I3 into the needle head |2.` Wick filled tubes II6, II1 and |I8 lead from the delivery end of the tube II5 and release oil from above onto the moving parts within the needle head I2. The excess oil thrown off by the needle operating mechanism is collected in a small sump I I 9 in the bottom of the needle head I2. Connecting with this sump |I9 is an inclined duct |20 which leads upward to a lateral port I 2| in the left 6 Thefexcess‘oil dripping from the lubricated parts drips back into the main supply within the bottom of the base I and is recirculated by the action of the gears 46-46. In order that the oil ' level in the base of the machine may be checked from time .to time, there is provided a gauge ‘ rod |60 which extends down into the base I and which at its top has a knob ISI accessible for „ convenience of grasping it within a recess I 62 formed in the walls of the standard I0 (see Figs. I and IV). Leakage of oil from the base I at the clearance opening 51 through which the feed dog carrier 56 extends is prevented by a moving sealing means |63 which, as shown in Figs. III and IV, comprises a plurality of washers |65 which snugly surround the cylindric shank of the carrier 56 and which are pressed against the face of a machined recess |66 in the inner side of the wall 58 by a leaf spring |61. At its lower end the spring |61 is secured to the wall portion 58, and at its upper end is bifurcated to straddle the shank of the feed dog carrier bar 56. In order that the more delicate parts of the rotary hook 36 may be lubricated with a diifer ent, lighter grade of oil from that used for the other moving parts of the machine, there is pro vided a separate source of supply for such oil in the form of a glass gravity feed cup, which is shown at |16 in Figs. II, IV and V as being mounted on the top of the base I in the rear of the standard I0. At the bottom, the cup |10 communicates with a vertical duct I1| in an enlargement I 12 at one corner of the -base I with in the chamber 1. Leading >from the duct I 1|. within the chamber 1 is a tube |13 b-y which the oil from the cup |10 is conducted to a nipple I 15 screwed axially into the inner or cap bear ing for the hook shaft 31 as shown in Figs. I and III. As further shown in Fig. I, the hook hand end bearing bushing I5 for the shaft I1, 40 shaft 31 is hollow and open within its inner bear ing to receive the oil conveyed into said bear which shaft, as shown in Fig. I, is formed with ing by the tube |13. The internal construction in the confines of said bearing with two relatively of the rotary hook 36 may be as shown in U. S. wide interlapping spiral grooves |22 pitched in one direction and also with a shorter and nar . Patent No. 2,035,984 granted to George Sauer on March 31, 1936, so that the oil may reach the rower oppositely pitched groove |23. As the shaft bearing surfaces between its rotating and non I1 rotates, the helical groove |22 functions as rotating parts. As a means for controlling the a pump to constantly lift the accumulating oil flow of oil to the rotary hook, there is provided from the sump I I0 in the needle head through a regulating screw I15a which engages radially the duct |20 into the bearing I I5 to lubricate it and to discharge the excess from said bear 50 into a collar enlargement |16 on the hook shaft 31 immediately behind the hook and externally ing into the hollow of the frame arm II where of the end wall 5 of the base I. As shown, the from it drains along the downwardly inclined inner end of the screw I15a is diametrically re slope at the bottom of said arm back into the duced and passes into the duct of the hook shaft base I. At the same time, the smaller reversely pitched groove |23 slightly opposes the action of 55 to- partially obstruct said duct. This construc tion is advantageous not only by reason of its the longer groove |22 to maintain an oil seal simplicity but in that it permits accurate adjust within the bearing I5 and thus prevents air pump ment of the oil ilow to the hook without neces-' ing when the shaft becomes worn. Some of the sitating disassembling of the latter for the pur dispersed oil is, moreover, caught in a well |25 (Fig. I) integrally formed with the machine frame 60 pose. While an illustrative embodiment of the inven within the standard I0 above the lower shaft 43. tion has been set forth in considerable detail, it Leading horizontally from the well |25 through will be understood that numerous changes may the top wall 2 of the machine base I is a duct |26 which delivers into a channel |28 formed in 65 be made in the construction, combination and ar rangement of the various parts without depart the depressed free end portion 55 of said top wall. ing from the principles and scope of the inven tion. As set forth in detail in said parent applica I claim: tion, provision is made for the distribution of 1. In a sewing machine having a frame with lubricant from the channel |28 to various bear 70 a hollow work supporting base containing a sup ing surfaces of the shafts 31 and 43, the gears ply of lubricating oil, and a hollow overhanging 4I and 42, and the work feeding mechanism. The arm sustained by a hollow standard at one end right hand end bearing 45 for the shaft 43 is of said base, the hollows of said base, arm and lubricated by oil passing directly down through a duct 45a from the wall |25. ‘ standard being intercommunicating, needle op 75 erating mechanism in a head at the free end of miams; ther» frame arm, and; means for elevating; oil from the/supply and dispersing itas rasmist within thel standard for. lubricating moving parts WithinV the frame,` the combination of aV presser: bar confined. to up. and down movement. in. the. needle- head,and means for lifting thezpresser bar including*a horizontal. rock shaft. journalledv in. a, bearing' lugY within the frame arm adjacent‘the upper end> of said standard. alifting arm. on the shaft: with', in the needle head" and connected' to. the; presser. bar, an operating` lever connected to the shaft in a.. recess. opening into the framefarm> in'V the; said needle. head, a- rocky shaft extending longi tudinally.- Within said arm, Y connections from-said shaft. to said. presser» bar> for lifting; the same,V an. operating member connected; with said` rock. shaft andextending through a substantially sea-led. opening in a; wall> of. said overhanging arm,` said. Work supporting> member being externally re cessed in. its rear-wall at`r a; point beyond the nor-V mal; path. of travel ¿of the work passing over said. supporting member and, having. an yaperture through itsv worlesupportingv surface in the region of said recess; a rock memberl mounted. on said work: supporting member in saidrecess andV ar bearinglug aforesaidand extending outward from said recess, the rear~` wall of the basebeing in, wardly recessed, saidy recessed portion being over. hung'` by the topiwalllof the’ base; a motion trans lating lever f-ulcrumed intermediate itsl ends` ranged tovbe. operated, atzwill, anda link passing: » throughy said aperture connected. at, itsv opposite ends with said; rock member and with: said> op erating member. . . . 3.. In. a sewing- machine,_. a. hollow> frame; oom prisingY a1 base,_a.standard rising-l from` oney end of. wall portion of the base, said operating.` lever on: the ~base,.andî an overhanging arm extending from the rock shaft extending laterally from the frame; 20 said. standard; over said base. and carrying a nee arm, at'hrust'. bar extending: down'from the. op dle head. at,y its end, said; base` comprising an en erating lever and. through a; guide hole inthe closed housing havingazgenerally rectangular out overhangingl portion of the work` support to one line in. plan but, having an external recess. in one on a stud. projecting outward; from the recessed; extremity of the motion translating; lever',4 and side, a presser bar movable up and down in said means enabling thev connection of the other eX' 25 needle head, and; means for lifting. said presser tremity of the motion translating lever'to an ac bar comprising; a. roel; member mounted in- said tuatingfknee pressor footgtreadle. recess. in said. side. of. the> base exteriorly of the. 2. Ina sewing machine having a` hollow frame enclosedhousing. a link connectedwith said mem. with a work supporting. member, a vertical stand ber extendingl along. said... standard, a. rock shaft ard and an. overhanging arm in interoommunica 30 within. said arm connected at: one end. with` saidi tion, said arm carrying a needle head at its free end, the lower portion of said framebeing formed to provide a lubricanty sump. from which oil may be dispersedthrough said frame, theY combina. tion of a` presser bar. movable up and down in 35 link and at its other: end. with. said presser, bai.; and spring; meansY operableV to hold` said` presser; bar lifting means normally; in an idle position. ‘ OSCARzAQUIST.