US2176048A - Sewing machine lubricating system - Google Patents

Description

Oct 17, 1939. G. A. FLEcKENs'rElN Er Al.

` SEWING MACHINE LUBRICATING SYSTEM 4 Sheets-Sheet 1 origina; Filed June 19, 1935 777' MQW Oct, 17, 1939. G. A. FjLEcKr-:NSTEIN Erm. 2,176,048

SEWING MACHINE LUBRICATING SYSTEM 4 sheets-smet 2 Original Filed June 19, 1935 x L @affermava y @dimm @Micra/HMI;

G. A. FLEcKENsTElN Er AL 2,176,048

SEWING MACHINE LUBRICTING SYSTEM Get. 417, 1939.

4 Sheets-Sheet 5 Original Filed June 19, 1935 ww@ l E l 4/1` l X l l w QN SN ww m a QNN QM. NNN

WLM@ f Q Y s. A. FLEcKENs'rEIN E-r Al. 2,176,048

SEWING MACHINE LUBRICATINGv SYSTEM Oct. 17, 1939.

. 4 sheets-sheet 4 Original Filed June 19, 1935 Patented Oct. 17, 1939 SEWING MACHINE LUBRICATING SYSTEM George A. Fleckenstein, Stratford, and Max L.V

Waterman, Fairfield, Conn., assignors to The Singer, Manufacturing. Company, Elizabeth, N. .1., a corporation of New Jersey Original application June 19, 1935, Se'rial No. 27,300. Divided and this application JulyA 7, 1936, Serial No. 89,296

Y 7 Claims. (Ci. 112-256) y rI'his invention relates to a lubricating system against lateral movement by a boss 21 'formed for sewing machines and has for its objective a with an open ended guldeway and Vis providedv provision of a new and novel method of lubriwith a locking nose 28 which is adapted to enter cating the actuating mechanism for the take-up the slot 24 in the eccentric. The other end exand an improved method f lubricating the beartends upwardly ugh an opening in the bed .I ings and pivotal connections below the clothand the lever is normally held in the position plate. shown in Fig. 1 by means of a plunger 2 3'urged In the drawings: Y v upwardly by a springjil located in a bossi! Figure 1 is a side elevation, partly in section, formed on the bed of the machine. To adjust the. of a sewing machine embodying our improved lu` stitch-length the operator depresses the iingerl0 bricating system, 1 lever 25 and rotates the shaft I8 by turning the Figure 2 is an end elevation of the machine, balance-wheel-B until the desired stitch-length with the face-plate removed. adjustment is obtained.

Figure 3 is a top pian view with the cloth- The front side of the bed I, which is nearest plate and lbracket-arm removed to expose the the Operator, iS formed with upstandin8-berings 15. mechanism below the bed. a 32 and 32 in which is .iournaled a short shaft Figure 4 is a sectional view taken substantialhaving'` a feed-rocker ,34 xed thereto and is 1y along the line 4-4 of Figure 2. rocked back-and-forth by a pitman 3l having Figure 5 is a sectional view taken substantialone of its ends embracing an eccentric 23 and its 1y along the line 5 5 of Figure 2. other end secured to a short shaft r35 carried 20 Figure 6 is a sectional view taken substantialby the feed-rocker. A feed-bar 346, carrying aly along the line 3 5 of Figure 1. v feed-dog 39, bridges the space between the leedv In the embodiment of the invention selected rocker`34. and the feed-shaft I3 and has one of for illustration I is the inverted trough-shaped its ends journaled on the short shaft 3 5 carried bed of themachine to-which is secured by the by the feed-rocker and its other end overlying 25 screws 2 the standard 2 carrying an overhanga block 31 which cooperates with the feed-lift ing bracket-arm 3 which terminates in a holloweccentric 22. The feed-bar n36. is formed with a head 4. Journaled in the spaced bearings 5 and depending portion 40. and secured thereto by 6 in the overhanging arm 3 is a needle-bar drivthe screws 4I is a plate 42 which underlies the ing-shaft 1 having, the usual balance-wheel 8 eccentric 22. From the foregoing, it will be ob- 30 xed thereto and journaled in the bearings I3 served that when the feed-shaft I8 rotates, the 'and I4 in the bed is a rotary hook-shaft 9 having feed-bar 36 is given a feed-and-return movement a rotary hook I5 xed'to one end thereof and by the eccentric 23, pitman 38 and feed-rockerv fixed to the other end is a pulley I0 which is oper- 34, and a rising and falling movement by the -'ecatively connected to the pulley II by theclip-- centric 22. Y 35 belt I2, the ratio being as I is to 2, and, therefore, Located at one side of the needle-bar shaft 1 the hook-shaft Q makes two complete rotations and journaled in bearings 45 carried by the wall for each rotation of the needle-bar shaft 1. Jourin the overhanging bracket-arm 3 is a rock-shalt naled. in the bearing I6 and l1 in the bed I is a 46 formed with a boss 46' on the end extending feed-shaft I8 having a pulley I9 fixed to one of its into the hollow-head 4. Secured` to the boss 4i 40 ends and driven by means of the clip-belt 20 by the screw 41' is a take-up lever 41 madebf Y fromthe pulley 2I carried by the shaft 1 at the light material, such as, aluminum. To the and ratio'of I to I. 'extending into the bracket-arm there is secured Secured to the end of the feed-shaft vI8 exan arm da which is operatively connected by tending through the bearing I6 is a. feed-liftecmeans of the pitman 49 to the crank 50 formed 45 centric 22 and xed to the shaft I8 on the oppoon the needle-bar actuating shaft 1. -Disposegl'pn site side of the bearing is an adjustable eccentric the other side of the needle-bar shaft 1 and subi- 23. The eccentric 23 is the same as that shown stantially diametricaliy opposite the shaft 45 i8 a in the patent to J H. Stearns, No. 2,029,278, dated second shaft 52 jour-naled in the bearing 53; The January 28, '1936, and which is provided with a shaft y52 is formed with a. boss 52' and in the end 50 notch 24 for the purpose of adjusting the throw of the eccentric. To effect adjustment of the eccentric, there is provided a finger-lever'25 pivoted intermediate its ends to the bed I by means ofthe pivot-pin 26. One-end ofy the lever is held of the shaftextending into the hollow-head 4 there is secured by the screw 54' a take-up lever -54 (Fig. 2) To the other end ofthe shaft which extendsinto the over-hanging bracket-arm 3 there is fixed a leverl 55 which is operatively connected 55 needle-bar shaft 1.

From the above it will be observed that the take-up levers are arranged on opposite sides of their actuating shaft and substantially 180 apart and are rigidly connected to short shafts which extend through the partition or wall separating the hollow-head from the overhanging bracketarm and are actuated by mechanism located within the bracket-arm, `the mechanism for each take-up lever being the sameand arranged complemental to each other. This construction affords a take-up mechanism ywhich is balanced both statically and dynamically as each action on one side of the needle-bar shaft is counteracted by an equal and opposite reaction on the other side of the shaft. It will also be observed that the ends of the take-up levers overlap. This,

construction permits the pivotal axes of the levers to be placed near the needle-bar shaft thereby making a more compact arrangement of the parts.

As shown', the shaft 1 has secured to its end a counterbalancing disk 68 having a crank-pin 69 attached thereto by a set-screw 61 and disposed with its axis offset from the axis of the shaft 1. A needle-bar 10 carrying a needle 1| extends through a suitable bearing 12 in the. bottom of the head 4 and is operated by the usual pitman 13 having one of its ends pivoted to the crankpin 69 and the other end pivotally secured to the needle-bar 10. A presser-bar 14 carrying a presser-foot 15 which cooperates with the feed-dog 39 extends through a suitable bearing 16 in the head and is spring urged downwardly by the fiatleaf spring 11 which acts against the rod 18 carriedby the presser-bar 14.

To lubricate the mechanism Within the hollow head 4, the latter is formed with a depression |00 in which excess lubricant collects. Wicks |0| have one of their ends depending in the lubricant reservoir |00 and theirother ends secured to the pad |02 Which is carried by the plate |03 fixed to the head of the machine and the pad |02 is positioned to be engaged by the upper end of the needle-bar link 13,for the purpose of lubricating the crank-pin 69. The wick |04 has one of its ends depending in the reservoir and its other end threaded into an aperture |06 running longitudinally of the bushings 45 and 45* and communicating with the rockshaft 46. The wick |05, likewise conducts lubricant upwardly by capillary attraction to the aperture |03 in the bushings 53 and 53.

The bracket-arm 3 is formed with an interiorly arranged upstanding iiange and is inclined downwardly towards the head to provide an oilreservoir into which the ends of the lever 48 and pitman 49 dip therebylubricating the take-up actuating mechanism which is located in the bracket-arm by the "splash system. A disk H0 is secured to the shaft 1 so that the oil spray whipped up' by the moving parts will be confined to the end of the arm in which the actuating mechanism for the take-up is located.

To lubrieate the bearings and pivotal connections located below the cloth-platev III, thev base of the machine is inclined so as to cause excess oil to'collect in a sump ||4 located in rear of the bed and adjacent the pulley end of the feedshaft I3. A wick ||5 conducts lubricant from the sump ||4 to thebearing 32 and an second wick IIB conducts lubricant to the bearing 32'. In both instances the wicking is threaded into a longitudinally arranged aperture in the bushings and engages the rock-shaft 33. A wick H8 is threaded through the tube ||9 and has one of its ends depending in the sump ||4 and its other end raised above the bed and supported by means of the tube ||9 (see Fig. 4). To conduct lubricant from the wick H8 to lthe pivotal connection for the feed-bar Vthe shaft 35 is formed with a. longitudinally arranged groove in which is fitted a wick I|1. When the feed-rocker 34 rocks hack and forth the end of the wick ||1 intermittently engages and wipes oil from the end of the wick ||8 and conducts it to the bearing for the feedrocker.4

The wicks |20 and |2| conduct lubricant from the sump |I4 to the bearings I6 and I3, respectively, and are threaded into the bearings in the same manner as the wick I5 is threaded into i the bearing 32.

The wick |22 conducts lubricant to the depression |23 formed in the feed-bar 36. When the feed-bar 36 executes its four-motion movement the brous material in the depressionvwipes the oil from the wick |22 and the oil is led to the bearing block 31 and eccentric 22 through the aperture |24 and the oil conduits |25.

To lubricate the eccentric 23 a wick |21 is provided which conducts the oil to the fibrous material or porous pad |23 carried by the pitman 38 (Fig. 3), an aperture being provided for conductng the oil from the brous pad |28 to the eccen- This application is a division of our prior application Serial No. 27,300, filed June 19, 1935, now Patent No. 2,120,127, to which reference may be had for a more complete description of the stitch-forming and feeding instrumentalities.

From the foregoing description considered in connection with the accompanying drawings, the construction, manner of operation and several advantages of our improved machine will be l clearly and fully understood. It is apparent that such a machine has a wide variety of uses, and it will be understood that the form, construction and arrangement of the several elements employed may be varied. Therefore,v the privilege is reserved of resorting to all such legitimate changes therein as may be fairly embodied within the spirit and scope of the appended claims.

I Having thus set forth the nature of the invention, what we claim herein is:

1. A sewing machine 'having an overhanging bracket-arm terminating in a hollow head, a take-up lever within said hollow head, mechanism located within the bracket-arm and externally of the head for actuating said lever and an oil reservoir within the bracket-arm into which said mechanism dips when the machine is operated, wherebythe actuating mechanism for the take-up lever is lubricated by the splash system.

2. A sewing machine having an overhanging bracket-arm terminating in a hollow head, a needle-thread take-up lever, mechanism located within the bracket-arm and externally of the head for` actuating said lever, and an oil reservoir` located beneath said mechanism and into which said mechanism dips when the machine is operated.

3. A sewing machine having in combination. an

overhanging .bracket-arm terminating in a hollow head, a needle-thread takeup lever, a crank and link mechanism located within said bracketarm and externally of the head for actuating said take-up lever, and an oil'reservpir into which said" crank and link'mechanism dips when the machine is operated, whereby the mechanism is lubricated by the splash system.

4. A sewing machine having in combination, a bracket-arm terminating in a hollow-head, a rotary shaft, eccentric means actuated by said shaft.' a pairof rock-shafts,takeup levers actuated by said rock-shafts, mechanism comprising links operatively connecting said eccentric means to said rock-shafts, and a lubricant reservoir arranged externally of said head, into which at least one of the links dips when the machine is operated whereby the mechanism is lubricated by the splash system.

5. A sewing machine having a hollow bracketarm carrying a head, a needle-bar shaft journaled in said bracket-arm, take-up actuating shafts disposed on opposite sides of s aid needlebar shaft, take-up elements carried by said takeup actuating shafts, mechanism within the bracket-arm for operatively connecting the needle-bar shaft with the take-up actuating shafts and an cil reservoir Within the bracket-arm and exteriorly of said head into which a portion of said mechanism dips when the machine is operated.

6. A sewing machine having a hollow bracketarm carrying a hollow head, a partition'separating said head yfrom said arm, a needle-bar shaft -Journaled-in said arm, take-up shafts extending through said partition, take-up elements carried one on the end of each 'of said take-up shafts, mechanism located within the arm and operatively connecting said needle-bar shaft with the take-up shafts and a lubricant-reservoir vlocated beneath said mechanism and into which a portion of the mechanism dips when the machine is operated.

7. A sewing machine having a hollow bracketarm carryinga head, a partition between said head and said bracket-arm, a needle-bar shaft journaled in said partition, take-up actuating shafts journaled in said partition, take-up elements carried by said take-up actuating shafts and located within the hollow-head, an oil reservoir within the bracket-arm and exteriorly of A said head, and mechanism within the bracketarm -for operatively connecting the needle-bar shaft with the take-up actuating shafts and including means which dips into the oil in the reservoir when the machine is operated to thereby lubricate the .actuating mechanism within ther bracket-arm.

GEORGE A. FLECKENSTEIN. MAX L. WATERMAN.

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