US2267581A - Lubricating means for sewing machines - Google Patents

Description

Dec. 23, 1941.

s. zoNls LUBRIGA'IINGl MEANS FOR SEWING MACHINES Filed Jan. 3,- 1940 2 sheets-sheet 1 y T RNA'EY.

Dec.. 23, 1941. s, zoNls 2,267,581

LUBRICATING MEANS FOR SEWING MACHINES ,Y

Filed Jan. 3, 1940 2 SheetS--Shee'tl 2 kb f Patented Dec. 23, 1941 LUBRICATING MEANS FOR SEWING MACHINES Sydney Zonis, Stratford, Conn., assignor to The Singer Manufacturing Company,

Elizabeth,

N. J., a corporation of New Jersey Application January 3, 1940, Serial No. 312,247

(Cl. Ilz-256) 16 Claims.

This invention relates to improvements in sewing machines and has for an object to provide a quiet-running high-speed loop-taker mechanism for sewing machines, together with simple means for adequately lubricating said mechanism automatically.

The invention has for a further object to provide simple but effective means for supplying lubricant automatically to the feed-actuating mechanism of a sewing machine. A further object of the invention is to provide a sewing machine having a hollow bracket-arm with improved means for supplying lubricant to actuating mechanism housed by the bracket-arm.

With these and other objects in view,` as will hereinafter appear, the invention consists in the devices, combinations and arrangement of parts described in connection with the accompanying drawings which illustrate a preferred embodiment of the invention and in which:

Fig. 1 represents a vertical longitudinal section of a sewing machine containing the present improvements. Fig. 2 represents a transverse section of the machine bed-plate on substantially the line 2-2 of Fig. 1. Fig. 3 represents an enlarged ross-section of the feed-advance eccentric on substantially the line 3--3 of Fig. 1. Fig. 4 represents an enlarged c'rosssection of the feed-lift eccentric on substantially the line 4 4 of Fig. l. Fig. 5 is a disassembled perspective view of the loop-taker shaft bushing and the shaft supported thereby. Fig. 6 represents a horizontal section of the loop-taker shaft bushing and of the pinion partly embraced thereby. Fig. 7 is an enlarged perspective view of the needle-bar reciprocating crank-disk. Fig. 8 is an enlarged perspective view of a portion of the crank-pinearried by the crank-disk of Fig. '7.

The sewing machine illustrated in the drawings has a bedor cloth-plate I, from one end. of which rises the standard 2 of a hollow bracket-arm 3 overhanging the cloth-plate and terminating at its free end in a head 4.

Rotatably journaled in the bracket-arm 3 is a horizontally-disposed main actuating shaft 5, carrying at one end a belt-pulley 6 disposed directly adjacent a ball-bearing I for that end of the shaft 5, the shouldered outer race ring of said ball-bearing being fixed in an apertured boss 8 of the bracket-arm 3. Lubricant may be supplied tothe ball-bearing 'I through a duct 9 provided in the upper wall of the boss directly adjacent the inner end of the ball-bearing 1. Adjacent its opposite end, the shaft 5 is journaled in a ball-bearing I0 of which the outer race-ring is suitably xed in a. horizontally apertured lug II within the bracket-arm 3, and lubricant may be supplied to said ball-bearing I0 through a duct I 2 in the upper wall of the bracket-arm 3.

'Carried by the end of the shaft 5, adjacent and spaced slightly from the ball-bearing I0, is a counterbalanced crank-disk I3 which has an aperture I3' receiving a crank-pin I4 secured to the crank-disk by a screw I5 which preferably engages a flattened portion of said crank-pin. The portion of the crank-pin I4 directly adjacent the crank-disk I3l is loosely embraced by an apertured boss I6 at the upper end of a needlebar link I'I, a roller-bearing I8 of the needlebearing type being interposed between` the boss I 6 and the crank-pin I4. At its lower end the link I'I is pivotally connected to a-vertically reciprocatory needle-bar I9 between vertically spaced bearings for said needle-bar. The upperbearing of the needle-bar I9 comprises a bushing 20 suitably secured in a frame-bracket 2l, said bracket being disposed directly below the crank-pin I4 in the lowest position of the latter. The lower needle-bar bearing comprises a bushing 22 suitably secured in the head 4 of the bracket-arm. At its lower end, the needle-bar carries a needle 23.

Secured to the free end of the crank-pin I4 is one of a pair of disks 24 of a rotary take-up device, said disks 24-being concentric with the main-shaft 5 and cooperating with another or rearward pair of take-up disks (not shown) in handling the needle-thread in substantially the manner more fully disclosed in my prior patent application Serial No. 168,553, filed Oct. 12, 1937 which has resulted in U. S. Patent No. 2,191,736 dated February 27, 1940.

The inner side face of the crank-disk I3, in the region of the crank-pin I4, is cut away to provide asegmental and undercut lubricantcatching shoulder 25. The end of the crank-pin I4 which terminates adjacent said lubricant catching shoulder 25 is likewise cut away segmentally to provide a lubricant-entrance recess I4 adjacent the shoulder 25 and connected by a peripheral spiral groove 2B of the crank-pin I4 with the needle-bearing. I8. In the usual stopped position of the machine, the needle-bar I9 is approximately at the upper end of its stroke and, in this position, the crank-disk shoulder 25 is disposed directly below the lubricant-duct I2. Consequently, when oil is introduced into said duct I2, it will not only serve to lubricate the ball-bearing I0, but a portion of the oil will also be caught by the crank-disk shoulder 25 and 4casing by screws, as 42.

enter the crank-pin recess |4'. Upon operation of the machine, the oil in the recess I4' will be conducted by the spiral groove 26 to the needlebearing I8. Excess oil introduced through the duct |2 will drain to the inner bottom wall of the bracket-arm head 4 and will be absorbed by a pad 21 of felt, or other suitable material, disposed so as to be engaged by the lower end of the needle-bar link A| 1, thereby lubricating the pivotal connection between said link and the needle-bar 9.

The main shaft carries a peripherally grooved pulley 28 connected by a clip-belt 29 disposed within the arm-standard 2, to a grooved pulley 30 carried by one end of a loop-taker and feed-actuating shaft 3| rotatingone-to-one with the shaft 5 and disposed below the bed-plate I in substantial parallelism with said shaft 5. The shaft 3| has the pulley end portion thereof journaled in a ball-bearing 32, of which the outer race-ring is suitably fixed in a horizontally apertured bearing-lug 33 depending from the bedplate I. ATo supply lubricant to the ball-bearing 32, the arm-standard 2 is provided with an inclined oil-duct 34 terminating in a bed-plate recess 35 which is drained by a duct 36 in the bedplate lug 33, said duct 36 having its lowerend terminating at the inner side face of the ballbearing 32.

The opposite end portion of the shaft 3| is journaled in a bushing 31 secured by a screw 38 in a wall 39 of a substantially rectangular gearcasing and lubricant reservoir 40 depending from the bed-plate I, said gear-casing 48 having a bottom closure-plate 4| secured to the rim of the The shaft 3| extends beyond the bushing 31 to terminate within said gear-casing, and secured upon that end of the shaft, by a screw 43, is the hub of an internal gear 44. Disposed within the flange of said internal gear 44 is a driven pinion 45 in mesh with the teeth of the gear 44, the axis of rotation of the pinion 45 being preferably in the same ver-A tical plane as and above the level of the axis of rotation of the shaft 3|.` The ratio of the internal gear 44 and pinion 45 is such that said pinion rotates twice for each rotation of the gear 44.

The pinion 45, in the present case, is integral with one end of a horizontally disposed and tubular loop-taker shaft 46 having the opposite end portions thereof rotatably journaled in needlebearings 41 and 48. The needle-bearings 41 and 48 are disposed in relatively spaced relation in the horizontal aperture 49 of a bushing 50 secured by a set-screw 5| in a suitable aperture in a wall 52 of the gear-casing opposite to the wall 39 thereof. The bushing 50 has a peripheral groove 53 adjacent to and externally of the casing wall 52 for engagement by a tool suitable for manually adjusting the bushing endwise when free of the screw 5|.

The end of the loop-taker shaft 46 opposite the pinion 45 extends beyond the bushing 50, and secured upon that end of the shaft 46, by a screw 54, is the hub of a loop-taker 55 of the rotary hook type, said loop-taker being complemental to the needle 23 in the formation of locks'titches The loop-taker 55 has a cup-shaped body of which the'side wall has a conical inner face 56 divergent toward the rim of the looptaker body, said side wall being provided with the usual thread-carrier raceway 51. The base of the rotary loop-taker has radial oil-ducts 58 extending in opposite directions from a central -intermeshing pinion 45 oil-cavity 59 in the loop-taker body, said oil ducts 58 being connected by suitable ducts with the inner face 56 of the loop-taker. lA wick 68 is disposed in the bore 46 of the tubular looptaker shaft 46 and serves to feed oil lengthwise of said shaft into the oil-cavity 59, from which the oil is conducted by centrifugal force to the loop-taker raceway 51.

The end portion of the bushing 58, disposed within the gear-casing 40, is partly cut away to provide a substantially U-shaped bushing-extension 58' which partly embraces the pinion 45 and affords the necessary clearance for driving engagement of said pinion by the internal gear 44. Secured by screws 6| in the bushing-extension 50', at the side of the pinion 45 opposite to the loop-taker shaft 46, is a segmental block 62, which is rounded to t the extension 50' and has its upper portion cut away to provide clearance for the internal gear 44.

Extending horizontally from a side face of the block 62 and freely into the open end of the tubular loop-taker shaft 46 disposed within the gear-casing 48, is a tubular oil-conduit 63, and the block 62 is provided with a horizontally radial duct 64 disposed substantially normal to and connected with the conduit 63. The outer end of the duct 64 terminates in the peripheral face of the block 62 directly adjacent the rear rim 65 of the bushing extension 50', said rim extending lengthwise horizontally and being widthwise beveled downwardly and inwardly to form a lubricant runway in conjunction with the teeth of the adjacent pinion 45, as illustrated in Fig. 2 of the drawings. The runway 65 terminates in a shoulder 66 provided at the free end of the bushing-extension 50', thereby to obstruct the flow of oil along the runway in the region of the block-aperture 64. Excess oil supplied to the runway 65 will escape over the side edges thereof within the internal gear 44.

As illustrated in Fig. 2 of the drawings, an enlarged portion of the front wall 61 of the gearcasing 40 is partly cut away at the lower end ofthe wall' and is spaced from the bottom closure plate 4|, and said enlarged portion of the wall 61 is-provided with a shouldered lubricant-supplying aperture 68 vextending vertically from the upper face of the bed-plate to terminate in said out away portion of the wall 61. Removably disposed in said aperture 68 is a shouldered and preferably partly flattened oil-supply measuring rod 69 adapted to contact the bottom closure plate 4| when the upper end of the rod is substantially ush with the upper face of the bed-plate Lubricant is supplied to the gear-casing 40 through the aperture 68 and preferably to the level indicated by the dot-dash line of Fig. 2, whereby the bushing extension 58 is disposed above the level of the lubricant supply and the internal gear 44 dips into said supply. The internal gear 44 rotates in the direction of the arrow shown in Fig. 2 and the gear teeth thereof serve as carriers for the lubricant. A portion of the lubricant carried by the teeth of the internal gear 44 is squeezed cut of said teeth at the point of lntermeshing engagement of the teeth of the pinion 45 with the teeth of said gear 44. However, a portion of the lubricant is carried by the intermeshing gear and pinion teeth beyond the intermeshing point of said teeth and is discharged upon the runway 65. Consequently, the and gear 44 serve, in a sense. to'measure the quantity of oil discharged upon the runway 65, from which the oil is supplied by means of the duct 64 and conduit 63 into the bore of the tubularloop-taker shaft 46 and to the wick 68 in said shaft. As before explained, the wick 68 feeds the oil lengthwise of the loop-taker shaft into the oil-cavity 58 of the rotary loop-taker, from which cavity the oil is conducted to the loop-taker raceway 51.

The loop-taker shaft 46 is provided with radial apertures, as 18, open to the needle-bearings 41, 48 to supply oil to said bearings. Excess oil supplied to the needle-bearings 41, 48 and discharged therefrom into the bushing-aperture 48 is drained through a duct 1| in said bushing and is free to flow back into the gear-casing along a flattened groove 12 provided in the outer face of said bushing and engaged by the set-screw It-will be understood, of course, that the major portion of the excess oil supplied tothe bore 46 of the loop-takershaft will be dischargedby centrifugal force through the radial aperture 18 proximate to the pinion end of said shaft. Consequently, the likelihood of oil leakage from the loop-taker shaft bearing adjacent the loop-taker 55 is minimized.

The Work is advancedl past the stitch-forming '4 mechanism by feeding means which is, in general, the same in construction as that disclosed in ,my prior Patent No. 2,151,308Mar. 21, 1939. The feeding mechanism includes a feed-advance eccentric 13 adjustably carried by the shaft 3| and embraced by the strap 14 of the pitman 15 pivotally connected to the crank-arm 16 of the feed-advance rock-shaft 11. is operatively connected to the feed-dog carrying bar 18 deriving rising andA falling movements from the feed-lift rock-shaft 19, said feed-lift rock-shaft carrying the crank-arm 88 pivotally connected to the pitman 8| having a strap 82 embracing a feed-lift eccentric 83 carried by the shaft 3|.

In the present machine, the rotary shaft 3| i provided with a longitudinal bore 84 extending from the end of said shaft within the gear-casingl 48 and closed at the opposite end of said shaft. Loosely disposed in the shaft-bore 84 is a substantially straight lubricant-conducting rod 85 which preferably has a slightly smaller diameter than that of the shaft-bore 84. The rod 85 preferably extends from the closed end of the shaftbore 84, within the' hub of the pulley 38, to and slightly beyond the opposite end of the shaft to protrudefslightly therefrom within the internal gear 44. In the operation of the machine, flying particles of oil within the internal gear 44 will adhere to the rod 85, enter the shaft-bore 84 and will be conducted by capillary action between the rod and shaft lengthwise of the bore of the shaft 3| to the opposite end of said bore.

The shaft 3| is provided, within the feed-advance eccentric 13, with a radial oil-duct 86 and the inner face of the eccentric 13 has a circumferential groove 81 opposite to the oily-duct 86. The eccentric 13 also has an oil-duct 88 connecting the groove 81. with a needle-bearing 88 interposed between the outer face of the eccentric 13 and the pitman-strap 14. By means of this arrangement, a portion of the lubricant in the bore 84 of the shaft 3| is centrifugally supplied to the needle-bearing 88.

The shaft. 3| has another radial oil-duct 88 within the feed-lift eccentrict 83, and the inner face of the latter is provided with a circumferential groove 8| opposite to said aperture 88. The feed-lift eccentric 83 also has an oil-duct 82 connecting the groove 8| with a needle-bearing 93 interposed between the eccentric 83 and the pitman-strap82 embracing the same. Consequently, the needle-bearing 83 is also supplied with lubricant from the bore 84 of the shaft 3|, through the oil-duct 88 of the shaft, and the groove 8| and oil-duct 92 of the feed-lift eccentric 83.

The rock-shaft 11 Within the hub of the pulley 30, the shaft 3| has a diametral oil-duct 84 open at its opposite ends to a circumferential groove v85 provided in the shaft-aperture face of said pulley hub. The pulley 30 has a diametral oil-duct 86 connectingV the groove 85 of the pulley 38 with the outer pe' off by. the belt in its travel, thereby rcreating within the bracket-arm 2, 3, a fine lubricant mist which finds its way to the bearings housed by said bracket-arm. Consequently, inadvertent neglect to supply lubricant to said bearings through -the framer oil-ducts provided for the purpose is not fatal to continued successful operation of the machine. In fact, the provision for direct lubrication of the bearings within the bracket-arm comprises primarily a safety factor.

It is believed that the present improvements will be clearly understood from the foregoing description. The housing of the internal-gear 44 and pinion 45 in a ar-casing which constitutes an oil-reservoir insures adequate lubrication of the intermeshing gear and pinion, and provides a silent running and durable means for driving the rotary loop-taker a pluralitykof times for each needle reciprocation. The arrangement described furthermore provides simple means for automatically lubricating the thread-carrier raceway of the rotary loop-taker and other operating mechanism of the machine. Consequently, manual lubrication of' the mechanism is minimized and requires only infrequent attention en the` part of the sewing machine operator.

Having thus set forth the nature of the inven tion, what I claim herein is:

1. In a sewing machine, a rotary loop-taker, a casing providing a lubricant-supply chamber, a loop-taker carrying shaft extending through a wall of said casing, a pinion carried .by said shaft within said casing, a rotary actuating shaft extending into said chamber through a w'all of said casing opposite to said first mentioned wall, and an internal-gear carried by said actuating shaft in driving engagement with said pinion and having the teeth thereof adapted to dip into a supply of lubricant within said casing.

2. A sewing machine having a horizontally disposed bed-plate, casing walls depending from said bed-plate, a bottom closure-plate detachably secured to said casing walls and providing there with a lubricant-chamber, a horizontal-axis rotary loop-taker shaft jcurnaled in one ofthe walls of said casing, a pinion carried by 'said shaft and disposed within said casing, ahorizcntaleaxis rotary actuating shaft journaled in a Wall of said casing opposite to said rst mentioned wall, an internal-gear carried by said actuatingshaft and in driving enagement with said pinion within said casing, said internal gear having the teeth thereof adapted to dip into a. supply of lubricant in said chamber, and a vertically disposed fllling aperture in a wall of said casing, the lower end of said filling aperture being disposed in proximity to and spaced vertically froml said bottom closure-plate.

3. In a sewing machine, a rotary loop-taker having a thread-carrier raceway, a casing providing a lubricant-supply chamber, an internalgear disposed within said casing and having the teeth thereof adapted to dip into a supply of lubricant within the casing, means for rotating said internal-gear, a bushing removably secured in a wall of said casing, a loop-taker carrying shaft rotatably journaled in said bushing, a. pinion carried by said loop-taker shaft and disposed within said internal-gear for engagement thereby, a lubricant-catching devi'ce provided upon said bushing within said internal-gear and disposed above the level of the supply of lubricant in said casing, and lubricant-conducting means lconnecting said lubricant-catching device with said raceway.

4. In a sewing machine, a rotary loop-taker having a thread-carrier raceway, a casing providing a lubricant-supply chamber, an internalgear disposed within said casing and having the teeth thereof adapted to dip into a supply of lubricant within the casing, means for rotating said internal-gear, a loop-taker shaft, a pinion carried by said loop-taker shaft land engaged by said internal-gear, a lubricant-catching device disposed within said internal-gear above the level ofthe supply of lubricant in said casing, and lubricant-conducting means connecting said lubricant-catching device with said loop-taker raceway.

5. In a sewing machine, a rotary loop-taker having a thread-carrier raceway, a casing providing a lubricant-supply chamber, a loop-taker carrying shaft, a pinion carried by said shaft within said casing, an internal-gear in driving engagement with said pinion and having the teeth thereof adapted to dip into a supply of lubricant within said casing, means for rotating saidy internal-gear, a stationary lubricant-catching device disposed within said internal-gear at the teeth-disengaging side of said pinion, and lubricant-conducting means connecting said lubricant-catching device with said raceway.

6. In a sewing machine, a rotary loop-taker having a thread-carrier raceway, a casing providing a lubricant-supply chamber, an internalgear disposed within said casing and having the teeth thereof adapted to dip into a supply of lubricant within the casing, means for rotating said internal-gear, a loop-taker carrying shaft having a longitudinal bore connected with said raceway, a pinion carried by said loop-taker shaft within and engaged by said internal gear, a lubricant-catching device disposed within said casing between said gear and pinion, and means for conducting lubricant from said lubricantcatching device into said bore of the loop-taker l shaft.

7. In a sewing machine, a rotary loop-taker having a thread-carrier raceway, a casing providing a lubricant-supply chamber, an internalgear disposed within said casing and adapted to dip into a supply of lubricant within the casing, means for rotating said internal-gear, a bushing removably supported by a wall of said casing, a loop-taker carrying shaft rotatably journaled in said bushing, a pinion carried by said looptaker shaft within said casing for engagement by said internal-gear, a lubricant-catching de,- vvice carried by said bushing and disposed within said casingl above the level of the supply of lubricant therein, and lubricant-conducting means connecting said lubricant-catching device with said raceway.

8. In a sewing machine, a rotary loop-taker having a thread-carrier raceway, a casing providing a lubricant-supply chamber, an internalgear disposed within said casing and adapted to dip into a supply of lubricant within the casing, means for rotating said internal-gear, a looptaker carrying shaft having a longitudinal bore connected with said raceway, a pinion carried by said loop-taker shaft within and engaged by said internal gear, a lubricant-catching device disposed within said internal gear above the level of the supply of lubricant in said casing, and means disposed within said casing for conducting lubricant from said lubricant-catching device into said bore of the loop-taker shaft.

.9. Ine/sewing machine, a rotary loop-taker having a thread-carrier raceway, a casing providing a lubricant-supply chamber, an internalgear disposed within said casing and adapted to dip into a supply of lubricant within the casing, means for rotating said internal-gear, a loop-taker carrying shaft having a longitudinal bore connected at 'one end with said raceway and terminating at its opposite end within said internal gear above the level of the supply of/ lubricant in said casing, a lubricant-catching device disposed Within said'casing above the level of the supply of lubricant therein, and means for conducting lubricant from said catching device into the end of the loop-taker shaft bore disposed .within said internal-gear.

10. In a sewing machine, a rotary loop-taker having a thread-carrier raceway, a casing providing a lubricant-supply chamber, an internalgeardisposed within said casing and adapted to dip into a supply of lubricant within the casing, means for rotating said internal-gear, a looptaker carrying shaft having a longitudinal bore connected at one end with said raceway and terminating at its opposite end within said internal gear above the level of the supply of lubricant in said casing, a lubricant-catching device disposed within said casing above the level of the supply of lubricant therein, and a tubular lubricant-conduit connected with said lubricantcatching device and extending into the end of the loop-taker shaft bore disposed within said internal-gear.

11. In a sewing` machine, a rotary loop-taker having a thread-carrier raceway, a loop-taker carrying shaft provided with a longitudinal bore connected with said raceway, a casing providing a lubricant-supply chamber, a pinion carried by said shaft within said casing, an internal-gear in driving engagement with said pinion and adapted to dip into a supply of lubricant within said casing, means for rotating said internalgear, a stationary lubricant-catching device disposed within said casing above the level of the supply of lubricant therein, a supporting member disposed within said internal-gear between said pinion and the hubof said gear, a lubricant-conduit carried by said member and extending into said loop-taker shaft bore endwise thereof, and lubricant-conducting connections between said lubricant-catching device and said conduit. v

12. In a sewing machine, a rotary actuating shaft provided with a longitudinal bore and with a radial oil-duct leading from said bore, a bearing having lubricant-conducting connections with said oil-duct, -means for conducting oil bore and with a radial oil-duct leading from said bore, a bearing having lubricant-conducting connections with said oil-duct, means for conducting oil longitudinaly of said shaft-bore comprising a subtantially straight rod loosely disposed for sidewise movement in the bore of said shaft into engagement with the inner 'wall of the shaft, said rod extending from the open end of the shaft-bore toward said ,oil-duct, and means for supplying oil to saidrod at the open end of the shaft-bore.

14. In a sewing machine, a rotary actuating shaft provided with an open-end longitudinal bore and with a radial oil-duct leading from said bore, an eccentric carried by said shaft and provided with an oil-duct, the oil-duct of said eccentric being disposed therein to receive oil from the oil-duct of said shaft and to discharge the oil between the outer face of the eccentricand the inner face of said strap, means for conducting oil longitudinally of said shaftbore comprising a substantially straight rod loosely disposed for sidewise movement in the bore of said shaft into engagement with the inner wall of the shaft. said rod extending from the open end of the shaft-bore toward said shaft oil-duct, and means for supplying oil to said rod at the open end of the shaft-bore.

15. A sewing machine having a frame including' a hollow bracket-arm, actuating mechanism including bearings disposed in said bracket-arm, and means for creating a lubricant mist in said bracket-arm comprising a rotary actuating shaft having a longitudinal bore and a radialpoilductconnected with said bore, a belt-pulley carried by said shaft and having a radial oil-duct connected 'with said shaft oil-duct, a rotary shaft journaled in said bracket-arm, a pulley carried by the bracket-arm shaft, a belt connecting said pulleys, and means for introducing oil into the bore of said shaft.

16. A sewing machine having a frame includ-Y ing a hollow bracket-arm, actuating mechanism including bearings disposed in said bracket-arm. and means for creating a lubricant mist in said bracket-arm comprising a rotary actuating shaft having a longitudinal bore and a radial oil-duct connected with said bore, a belt-pulley carried by said shaft and having a radial oil-duct connected with said shaft oil-duct, a rotary shaft journaled in said bracket-arm, a pulley carried by the bracket-arm shaft, a belt connecting said pulleys, a substantially straight rod loosely disposed for sidewise movement in the bore of said shaft into engagement with the inner wall of the shaft, said rod extending toward the radial aperture thereof, andvmeans for supplying lubricant to said rod.

i SYDNEY ZONIS.

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