US2721528A

US2721528A - Lubrication system for sewing machines

Info

Publication number: US2721528A
Application number: US228487A
Authority: US
Inventors: Albert C Peterson
Original assignee: Union Special Machine Co
Current assignee: Union Special Machine Co
Priority date: 1951-05-26
Filing date: 1951-05-26
Publication date: 1955-10-25
Anticipated expiration: 1972-10-25

Description

Oct. 25, 1955 A. C. PETERSON LUBRICATION SYSTEM FOR SEWING MACHINES 9 Sheets-Sheet 1 Filed May 26. 1951 NV wk Om mh #9 Om mw m: m:

ATTORNEY.

A. c. PETERSON 2,721,528

LUBRICATION SYSTEM FOR SEWING MACHINES 9 Sheets-Sheet 2 Oct. 25, 1955 Filed May 25. 1951 IN VEN TOR. ALBERT C- PETERSON ATTORNEY.

Oct. 25, 1955 A. c. PETERSON LUBRICATION SYSTEM FOR SEWING MACHINES 9 Sheets-Sheet 4 Filed May 26, 1951 5 y g m m m Y. 5 ME w. my m% m I 87/ 3 c vw m m 9L w QE 2 m d 5%---. A 8 5 {k mm 2 ms mm mm 8 Q Q mv N mv L N N T @T f E \2 w E mm mm mm ,1 mm 5 ma EN i C lWt om mt ma w mm a No om H- 6 Q 0Q 03 m V M 2 Nw mm ma f 2 E Q O I- :1 l l l m QT 0Q QT m! Oct. 25, 1955 A. c. PETERSON LUBRICATION SYSTEM FOR SEWING MACHINES 9 Sheets-Sheet 6 Filed May 26, 1951 FIG. '2

INVENTOR. ALBERT C- PETERSON FIG. I3

ATTORNEY.

Oct. 25. 1955 A. c. PETERSON LUBRICATION SYSTEM FOR SEWING MACHINES 9 Shets-Sheet '7 Filed May 26, 1951 mmw hnm \mmm \w '7'. u% H r MMWW WWWWWMWMMW 8N a m 8N M H H HH H H M WH I I I H I H I H V I I I mmw v8 am 1/ 08 on Ovw I 9 mmm Om mmm mmNJ @mm \mmw JN INVENTOR. ALBERT C. PETERSON ATTORNEY.

Oct. 25, 1955 A. c. PETERSON 2,721,528

LUBRICATION SYSTEM FOR SEWING MACHINES Filed y 26, 1951 9 Sheets-Sheet 8 FIGJT I: INVENTOR.

ALBERT C. PETERSON ATTORNEY.

Oct. 25, 1955 A. c. PETERSON 2,721,528

LUBRICATION SYSTEM FOR SEWING MACHINES 9 Sheets-Sheet 9 Filed May 26. 1951 5| FIGZZ I53 lla INVENTOR. ALBERT C. PETERSON ATTORNEY.

United States Patent LUBRICATION SYSTEM FDR SEWING MACHINES Application May 26, 1951, Serial No. 228,487

12 Claims. (Cl. 112256) This invention relates to industrial sewing machines adapted for high speed operation, and more particularly to machines of this character having incorporated therein improved means for supplying adequate lubrication to relatively movable parts that actuate stitch-forming and work-feeding devices of the machines.

A principal object of the invention is to provide effective, automatic lubrication of relatively movable, wear-receiving parts of a sewing machine to the end that the machine may be successfully operated at high speeds for extended periods of time without danger of becoming overheated or causing premature wear of such parts.

Another object of the invention is to provide, in a fiat bed sewing machine including a hollow vertical standard, a lubrication system having its parts so con structed and arranged as to deliver lubricant to various relatively moving parts while excluding lubricant from operating parts that are positioned within the standard.

Another object of the invention is to simultaneously effect adequate lubrication of various operating parts of a sewing machine and return excess lubricant transmitted to parts located below the cloth plate of the machine back to a body of lubricant that is contained in a reservoir or compartment formed in the machine base.

The invention has for a further object the incorporation in a flat bed type sewing machine of an improved lubrication system that is contained within the outer confines of the machine.

A still further object of the invention is to provide a sewing machine with a wholly-contained automatic lubrication system that is simple, compact and rugged in construction, that is reasonable in manufacturing and maintenance costs, and that is capable of performing its intended functions in an effective and trouble-free manner.

Additional objects, together with the advantages of the invention, will be readily apparent to persons skilled in the art upon reference to the following detailed description taken in conjunction with the accompanying drawings which respectively describe and illustrate a machine and modifications thereof embodying the invention.

In the drawings:

Fig. 1 is a vertical sectional view taken principally along the longitudinal axis of a machine embodying the invention;

Fig. 2 corresponds to the upper right hand portion of Fig. 1 and illustrates a modified form of construction;

Fig. 3 is a fragmentary view in enlargement of the top of the machine base;

Fig. 4 is an enlarged end elevational view of the machine as observed from the left of Fig. 1, the needle head cover plate being omitted for better illustration of parts within the needle head;

Fig. 5 is a view in enlargement of a portion of a linkage 7O arrangement taken along line 5'5 of Fig. 4;

Fig. 6 is an enlarged view in front elevation of the lower ice portion of the needle bar with a pair of needles secured thereto;

Fig. 7 is a view taken along line 77 of Fig.1;

Fig. 8 is a view in elevation of a multiple looper arrangement that is adapted to cooperate with the needle arrangement shown in Fig. 6 in the formation of stitches;

Fig. 9 is an enlarged fragmentary view taken along line 9-9 of Fig. 7;

Fig. 10 is a view in enlargement taken along line 1010 of Fig. 1;

Fig. 11 is a view of the lower portion of a conduit shown in Fig. 10 as observed from the the left thereof;

Fig. 12 is a view in enlargement taken along line 1212 of Fig. 7, parts being omitted for better illustration of other parts;

Fig. 13 is a view in enlargement taken along staggered line 13-13 of Fig. 7;

Fig. 14 corresponds to a portion of Fig. 13, parts being omitted to permit illustration of other parts not visible in Fig. 13;

Fig. 15 is an enlarged view taken along line 1515 of Fig. 7, a number of the parts being omitted;

Fig. 16 corresponds to Fig. 15 and illustrates a modified form of construction;

Fig. 17 is a top plan view of the upper portion of the machine, the cover plate for the vertical standard being omitted;

Fig. 18 is a front view of a thread take-up assembly employed with the machine;

Fig. 19 is a view taken from the right of Fig. 18;

Figs. 20 and 21 are views, apart, of a stripper finger that is an element of the thread take-up assembly shown in Fig. 18;

Fig. 22 is a view in enlargement taken along line 2222 of Fig. 7;

Fig. 23 is a view in enlargement taken along line 23--23 of Fig. 7;

Fig. 24 is an end elevational view of a thread camming device;

Fig. 25 is a side elevational view of the camming device shown in Fig. 24; and

Fig. 26 is a modified form of oil-slinging disc.

Referring now to the drawings, and more particularly to Fig. 1, there is shown a flat bed sewing machine frame comprising a base 30, a vertical standard 31, mounted at one end of and extending upwardly from the base, and a horizontally extending overhanging arm 32 that is parallel with the base and that terminates in a needle head 33. The vertical standard, overhanging arm and needle head are preferably of one-piece, hollow construction and are adapted to be removably secured to the base by a series of screws or the like 34. The vertical standard is provided at its upper end with a removable cover 35 for ready access into its interior. The needle head is similarly provided with a removable cover plate 36. A dished ledge or sump 37 is formed integral with the vertical standard and extends across the interior thereof. Above, but spaced from, sump 37 is a depending lug 38 that defines with cover 35 a compartment 40. A partition 41 extends across the interior of the overhanging arm at its juncture with the needle head.

Base 30 is also hollow and, as best shown in Figs. 1 and 7, comprises a bottom wall 42, a front wall 43, a rear wall 44, a pair of

end walls

45 and 46, and a wall 47 intermediate the end walls. The portion of the base between

walls

46 and 47 constitutes a driving pulley compartment 48 and, as is shown in Fig. 1, is open at its upper and lower ends. The portion of the base defined in part by

walls

43, 44, 45 and 47 constitutes a hollow compartment 49 for containing a supply of a suitable lubricant, such as an appropriate oil 50, and a number of devices that will be described in detail further along herein.

The base carries a cloth plate 51 which is provided with a removable, flush, cover plate 52 that allows for ready access to stitch-forming devices and associated parts located therebelow. As is indicated in Fig. 3, a fixed latch plate 53 is secured to the underside of cover plate 52 by a series of screws 54. A movable latch plate 55, having a series of slots 56, is slidably supported to the underside of cover plate 52 by screws 57 that extend through corresponding slots. Latch plate has a circular finger-receiving opening 58 that is accessible through a slot 59 in cover plate 52, whereby the latch plate may be moved with respect to the cover plate, as allowed by slots 56 and screws 57, to thereby effect engagement or disengagement of latch plate 55 with cloth plate 51. If desired, latch plate 55 may be spring-urged into the position shown in Fig. 3.

Extending through the base is a rotary driving shaft 60, consisting of

coaxial shaft sections

61 and 62 that abut, as indicated at 63 (Fig. 7), and that are joined together by a coupling sleeve 64 and set screws 65. Shaft is supported for rotation in a series of bearing sleeves, including a sleeve 66 carried by base end wall 46, a sleeve 67 carried by base intermediate wall 47, a sleeve 68 'carried by base end wall 45, and a sleeve 69 carried by a lug 70 (Fig. 7) that is integral with and projects upwardly from base bottom wall 42. A combined h'andwheel and pulley 71 is attached to one end of shaft 60. A driving pulley 72, positioned within compartment 48, is coaxial with and is secured to shaft 60 by a set screw 73.

A driven shaft 75 extends through overhanging arm 32 (Fig. 1) in parallel relation to driving shaft 60. Shaft 75 is rotatably supported in a bearing sleeve 76 carried by lug 3 8, and a bearing sleeve 77 carried by partition 41. A driven pulley 78 is secured to the end portion of shaft 75 that projects into vertical standard 31. Pulley 78 is directly above pulley 72 and is connected thereto by an open belt 30, made of a suitable oil-resistant material, such as an appropriate synthetic rubber, having imbedded therein a series of continuous bands of stranded reinforcing wire 81. Positioned within the needle head is a crank 82 that is secured to the left end portion of shaft 75, as viewed in Fig. l, for rotation with that shaft. Crank 82 is connected by suitable devices, including a link 83, to a vertically reciprocable needle bar 34. The foregoing parts are so arranged that rotation of shaft 60 imparts, through the medium of

pulleys

72 and 78 and belt 80, like rotation to shaft 75 and corresponding reciprocation to needle bar 84. A needle 85 is removably attached to the lower end of the needle bar and cooperates with devices contained within the base in the formation of stitches in a piece of work. These devices will be described further along herein. A thread-tensioning and guiding unit 86 is mounted at the front of the vertical standard (Fig. 4). The tension in thread supplied by unit 86 is adapted to be released by a mechanism, includmg a link 87, that is pivotally connected to a crank 88 which is attached to an end of a rock shaft 89 that extends through the vertical standard.

A vertically reciprocable presser bar 90 is carried by needle head 33 adjacent and parallel to needle bar 84. A presser foot 91 is pivoted to the lower end of the presser bar. The presser bar and, therefore, the presser foot are normally urged downwardly, as viewed in Fig. 4, by a compression spring 92 that bears at its opposite ends against an adjusting screw 93, operable from the exterior of the needle head, and a collar 94 which is secured to the presser bar.

The presser bar is adapted to be raised against the action of spring 92 and, simultaneous therewith, shaft 89 is adapted to be rocked by an arrangement of devices that will now be described, reference being had particularly to Figs. 1, 4, 5 and 10. This arrangement of devices includes a rock shaft 95 thatnextends through the overhanging arm and is parallel to driven shaft 75 (Fig. 1). Shaft 95 is supported at one end in a lug 96 (Fig. 4) that projects inwardly of the needle head and at its other end by lug 38. An actuating lever 97 extends through a slot 98 in the rear of the vertical standard (Fig. 10) and is secured to rock shaft 95 by a set screw 99. An arm 100 is affixed by a set screw 101 to the end portion of rock shaft 95 Within the needle head. A link 102 is pivotally connected at its upper end to arm 100 and at its lower end to a sleeve 103, slidable along presser bar 90, and by

screws

104 and 105, respectively. Another link 106 is pivotally connected to lever 97 by a screw 107 and is pivotally connected to an arm 108 by a screw 109. Arm 108 embraces the rear end of rock shaft 89 and is secured thereto by a set screw 110 (Fig. 10).

For the purpose of outlining the mode of operation of the just described arrangement of devices, it is assumed that the parts are in the relative position shown in Fig. 4. When the operator finds it desirable to raise presser foot 91 and simultaneously release the tension in the thread supplied to the machine by unit 86, she merely moves lever 97 in a counter-clockwise direction. This effects corresponding counterclockwise rotation of rock shaft 95 and arm 100 and upward movement of link 102 and sleeve 103, thereby moving collar 94 and presser bar 90 upwardly against the action of spring 92. At the same time, link 106 is moved downwardly, imparting corresponding rotation to arm 108 and rock shaft 89 which, in turn, actuates crank 88 and link 87 in a manner to cause unit 86 to release the tension in the thread supplied to the machine.

There is provided beneath the cloth plate a complemental stitch-forming member, in the form of an oscillatable looper 111. The looper is mounted upon the upper end of a looper carrier 112 (Figs. 1 and 13) which is pivotally supported at 113 by a rocker 114 that is suitably mounted in the base of the machine. It will be understood that looper 111 cooperates with needle 85 in the formation of double-locked stitches and is imparted both loop-seizing and shedding movements and needleavoid movements in the course of normal operation of the machine.

For the purpose of imparting loop-seizing and shedding movements to the looper, looper carrier 112 has a ball stud 115 projecting therefrom and cooperating with a strap 116 formed at one end of a connecting rod 117. The other end of rod 117 carries a similar strap 11S cooperating with a ball stud 119 at the upper end of an arm 120. The latter is secured to a rock shaft 121 which is journaled in bearings 122 and 123 (Fig. 22) and receives rocking movements by devices best shown in Fig. 9. Such devices include an arm 124 that is secured to rock shaft 121 by a set screw 125 and that carries at its outer end a ball pin 126 which is received by a'strap 127 at the lower end of'a connecting rod 128. This rod has an upper strap 129 which cooperates with a spherical eccentric 130 secured to driving shaft 60.

An eccentric 131 secured to shaft 60 (Figs. 13 and 14) is surrounded by a strap 132 which is connected to an arm 133 that constitutes an extension of rocker 114. The rocker is provided with a shaft 134, suitably journaled in the base of the machine frame. It will be understood that eccentric 130, through the connections herein identified, serves to impart the loop-seizing and shedding movements to the looper, while eccentric 131 serves to impart theneedle-avoid movements to the looper.

Thread (not shown) is adapted to be delivered by the thread-tensioning and guiding unit 86 to looper 111. Such thread is acted upon by a thread take-up mechanism 135, shown in Figs. 1, 7, l8 and 19. Certain parts of mechanism 135 are shown in greater detail in Figs.- 20, 21, 24 and 25. This mechanism comprises a bracket 136 that is secured by screws 137 to -a lug 1 38, extending upwardly from the base bottom wall (Fig. 1). Bracket 136 hasan elongated slot 139 and carries pairs of thread guides 140 on opposite sides of the slot. A rotary takeup device 141, best shown in Figs. 19, 24 and 25, comprises a hub 142 that is attached to driving shaft 60 by set screws 143, and a pair of parallel thread camming plates 144, spaced apart as indicated at 145 in Fig. 25, and adapted to register with slot 139. A member 146, mounted on the bracket, terminates in a bent over stripper finger 147 which projects into space 145 between thread camming plates 144 during operation of the machine.

A suitable work-feeding mechanism is provided in the base of the machine. This mechanism, as best shown in Figs. 4, 7 and 13, includes a rock shaft 148 journaled in

bearings

149 and 150, extending upwardly from the base bottom wall. An upstanding rock arm 151 is clamped, or otherwise secured, to shaft 148 (Fig. 13) and is pivotally connected at its upper end, as indicated at 152, to a horizontal feed bar 153. A downwardly extending curved arm 154, integral with feed bar 153, is pivotally connected at 155 to the lower end of strap 132. Adjustably mounted at the end of the feed bar, remote from pivotal connection 152, is a feed dog 156. By virtue of these connections, the feed bar is actuated in a manner to impart lifting and lowering movements to feed dog 156. Feed and return movements are imparted to the feed dog by an adjustable eccentric 157 which cooperates with a strap 158 (Fig. 4). The latter is pivotally connected at 159 to one end of an arm 160 that has its other end secured to rock shaft 148. It will be apparent that adjustable eccentric 157 will, through the connections described, cause rock arm 151 to oscillate about the axis of shaft 148 and thereby impart the feed and return movements to the feed bar and the feed dog.

Referring to Figs. 6 and 8, I have illustrated therein an arrangement of multiple needles and multiple loopers, respectively, which may be used in lieu of the single needle and looper arrangement, described above, when it is desired to provide, by a single operation, lines of stitching that are relatively close together. In this connection, there is provided at the lower end of needle bar 84 an enlarged transversely extending head 162 to receive and retain a pair of needles 85. Each of these needles isadapted to cooperate with a corresponding one of a pair of loopers 163 that are mounted upon the upper end of looper carrier 112 and adjustably secured thereto by screws 164.

As was stated earlier herein, compartment 49 in the base of the machine contains a supply of a suitable lubricant, such as lubricating oil 50. This oil is utilized for the purpose of thoroughly and automatically lubricating various bearing surfaces of the driven parts of the machine. The operator may readily ascertain the level of the lubricant by observing the same through a liquid level gauge that comprises a rod 165, made of polymerized methyl methacrylate, available under the trade name Lucite. The liquid level gauge is preferably the same as or similar to the one disclosed in Sauer Patent 2,301,460 to which reference may be had for details of construction and manner of use.

Lubricating oil is delivered to various wear-receiving parts in overhanging arm 32 and needle head 33 by a means that will now be described, reference being had particularly to Figs. 1, 7, l0, l1 and 22. This means,

comprises a conduit 166 that extends through and is supported by an inwardly projecting ledge 167, which is integral with vertical standard 31 and sump 37, earlier described. This conduit passes through a bushing 168 threadedly connected to ledge 167, and is drawn against the upper end of the bushing by a coupler 169. The conduit also passes through an oil-resistant, synthetic rubber bushing 178 in ledge 37. A flange 171, carried by the conduit, forms a fluid-tight seal with bushing 170. The conduit has a curved upper extremity 172 that projects into compartment 40, and an arcuate lower part 173 disposed within compartment 49 and-positioned adjacent to intermediate wall 47. Secured to part 173 by welding,

or any other manner known to the art, is an arm 174 that is affixed to intermediate wall 47 by a screw 175 (Fig. 23). This arm prevents vibration of the lower portion of the conduit during operation of the machine. Arcuate conduit part 173 has an inner slot 176.

An oil-slinging disc 178, having a hub 179, is coaxial with and is affixed to driving shaft 60 by a set screw 180. As best shown in Figs. 1 and 10, the lower portion of disc 178 and the lower extremity of conduit 166 extend into the body of lubricant 50. Also, a marginal part of the disc registers with arcuate slot 176. Upon rotation of driving shaft 60 and disc 178, the latter picks up oil and urges the same'upwardly through conduit 166, discharging the same into compartment 40. The oil transmitted through the conduit is either in the form of a relatively fine spray or a column of oil, depending on the size of disc 178, the speed of rotation of driving shaft 60, the diameter of conduit 166, and so forth. Oil delivered into compartment 40 is deposited on a mass of wicking 181. Excess oil falls by gravity into sump 37 and is thence returned by a conduit 182 into compartment 49.

Wicking 181 delivers oil to wicking 183 for lubricating the contacting surfaces of driven shaft 75 and bearing 76 (Fig. 10). A conduit 184, supported in lug 38 and partition 41, transmits, with the aid of wicking contained therein, oil from compartment 40 to wicking 185 for lubricating shaft 75 at bearing 77. A downwardly curved extension 186 is secured to the left end of conduit 184 (Fig. 1) and contains wicking for furnishing oil to the wear-receiving parts contained within the needle head. A felt pad or the like 187 in the bottom of the needle head serves to absorb and retain lubricating oil that may be deposited thereon. It will be understood that this pad may be periodically removed and replaced by a relatively oil-free pad, as required.

I find that the supply of oil to the bearing surfaces in the overhanging arm and the needle head may be increased, if desired, by employing the modified form of oil-slinging disc shown in Fig. 26, and identified by numeral 188. This disc, as in the case of disc 178, is also circular, but is provided with a series of peripheral recesses or notches 189. It has been determined that oilslinging discs of the type shown in Fig. 26 transmit greater amounts of oil upwardly through conduit 166 than in the case of disc 178, under the comparable conditions of construction and operation.

There is shown in Fig. 2 a modified form of construction at the juncture of the vertical standard and the overhanging arm. Here, the overhanging arm and cover plate 35 are so configured as to.form a partition 190 which defines an annular compartment 191 that is completely enclosed and is out of communication with the interior of the vertical standard. The construction shown in Fig. 2 positively prevents any oil delivered to the wicking in the overhanging arm from coming in contact with operating parts positioned in the vertical standard or in base compartment 48.

The invention also contemplates the lubrication of wear-receiving parts disposed in the base. In this connection and as is best shown in Fig. 7, a passage 192 in base rear wall 44 communicates with a cross passage 193 in base end wall 46 and bearing 66. Wicking 194, that dips in the body of the lubricant (Fig. l), delivers oil to shaft 60 and bearing 66 by way of

passages

192 and 193. Bearing 6'7 is adequately lubricated by oil mist created by disc 178. Another length of wicking 195 (Fig. 22) dips into the lubricant body and is carried by a conduit 196 through a wall of the base to supply lubricant to ball stud 119. There is provided in base bottom wall 42 at least one passage 200 (Figs. 12 and 13) that communicates with the bottom of compartment 49. This passage is closed at its outer end by a threaded plug 201 (Fig. 4). The base bottom wall also has a transverse blind passage 202 communicating with passage 200 and closed at its outer end by a threaded plug 203. This passage communicates with a vertical passage 204 having a lower plug 205 (Fig. 12). Wicking 206, supported by a helical spring 207, delivers oil from passage 202 to one of the bearings that supports shaft 148, and a similar wicking and vertical passage arrangement (not shown) delivers lubricating oil to the other bearing for that shaft. Another vertical passage 208 that communicates with transverse passage 202 is connected by a nipple 209 to a conduit 210 which contains wicking 211 for delivering lubricant to certain Wear-receiving parts within the left portion of the base (Fig. 7). A nipple 212, communicating with passage 213 which in turn communicates with transverse passage 202, contains wicking 215 for furnishing lubricant to hearing 68.

Referring now to Fig. l, I have shown therein a plurality of conduits, namely,

conduits

216, 217 and 218, that contain wicking for supplying lubricant to other wear-receiving .parts of the machine located in the left hand portion of the base. These conduits communicate with passages (not shown) in the base that connect with the supply of lubricant in compartment 49. Additional wick-containing conduits (not shown) furnish lubricant to other wear-receiving parts of the machine located beneath the cloth plate to the end that all such parts may receive adequate lubrication.

Excess oil supplied to bearing surfaces to the left of base end wall 45 (Fig. 7) drips by gravity into a sump 220 formed in base bottom wall 42 (Figs. 12 and 15). This sump communicates with a well or passage 221 that is defined, in part, by a removable bottom cover 222 which forms a seal with the base bottom wall with the aid of a gasket 223. Excess oil received in sump 220 passes through a filtering means 224 and thence into well 221. This filtering means comprises a filter pad 225, a screen 226 disposed across the top of the pad, and a retaining ring 227.

-A suction pump 230 (Figs. 1 and 15) returns oil received in passage 221 into compartment 49. This pump comprises an upstanding cylinder 231 positioned in a hollow lug 232 which is formed integral with the base bottom wall. The cylinder communicates at its lower end with passage 221 and extends above the normal level of lubricant 50 in chamber 49. Positioned in the cylinder is a rotor 233 having a helical peripheral groove 234 and a blind bore 235. A compression spring 236 in bore 235 bears against the rotor and a ball bearing 237 to normally and yieldingly urge the rotor upwardly. A disc 238 is afiixed to the upper end of the rotor. A collar 239, secured to driving shaft 60 by a set screw 240, is provided with a flange 241 that bears against the marginal portion of the upper surface of disc 238. The suction pump and flange 241 are so arranged that, upon rotation of driving shaft 60, flange 241 coacts frictionally with disc 238 to impart corresponding rotation to rotor 233. This effects transmittal of oil from passage 221 into compartment 49.

There is shown in Fig. 16 a modified construction wherein a suction pump of the character shown in Fig. 15 is driven positively, instead of frictionally. The suction pump of Fig. 16 is denoted by numeral 243 and, as illustrated, includes a bevel gear 244 which is secured to the upper end of rotor 233 by a set screw 245. This gear meshes with a second bevel gear 246 that is secured to driving shaft 60 by a setscrew 247. it will be apparent from an examination of Fig. 16, that upon rotation of driving shaft 60, bevel gear 246 drives bevel gear 244 to thereby impart rotation to rotor 233 and effect transmission of oil from passage 221 into compartment 49.

From the foregoing, it is believed that the construction, operation and advantages of my present invention will be readily comprehended by persons skilled in the art. It is to be clearly understood, however, that various changes-in the forms of apparatus set forth above may be made withoutdeparting from the scope of the invention, it being'intended thatall-mattercontainedtin the description or shown in the drawings shall be interpreted as illustrative only and not in a limiting sense.

I claim:

1. In a sewing machine comprising a frame having a base with bottom, top and side walls defining a lubricant reservoir, a vertical standard rising from one end of the base in the region of the reservoir, said top wall separating the interior of the standard from the interior of the reservoir, an overhanging arm projecting laterally from the standard over the base, and a needle head at the end of the overhanging arm remote from the standard, said standard, overhanging arm and needle head being hollow, a support within the frame in the region of the juncture of the standard and the overhanging arm, said support defining at least a portion of a lubricant compartment, a partition across the interior of the frame in the region of the juncture of the overhanging arm and the needle head, a first rotary shaft extending longitudinally of the overhanging arm and terminating in the needle head, said shaft being mounted for rotation in the support and the partition, a reciprocating needle-carrying bar in the needle head, first means responsive to rotation of the first shaft for imparting reciprocation to the needle-carrying bar, a second rotary shaft extending longitudinally of the base, second means at least partly within the standard for imparting simultaneous rotation to the shafts, devices in the base responsive to rotation of the second shaft for cooperating with the needle in the formation of stitches in a piece of work, third means for delivering lubricant from the reservoir to the first shaft and the first means, said third means including a conduit within the confines of the frame, passing through the top wall of the reservoir and establishing direct communication between the lubricant reservoir and the lubricant compartment and means for transmitting lubricant upwardly through the conduit, a sump in the standard in the region of the juncture of the standard and the overhanging arm, said sump being disposed under the compartment, and a second conduit wholly within the confines of the frame connecting the sump and the reservoir for returning excess lubricant from the sump to the reservoir.

2. In a sewing machine comprising a frame having a base, a vertical standard rising from one end of the base, an overhanging arm projecting laterally from the standard over the base, a lubricant compartment in the upper portion of the frame at the juncture of the overhanging arm and the standard, and a needle head at the end of the overhanging arm remote from the standard, said standard, overhanging arm and needle head being hollow, said base having bottom, top and side walls that define a lubricant reservoir that is disposed at least partially beneath the standard, said top wall separating the interior of the standard from the interior of the reservoir, a first rotary shaft extending longitudinally of the overhanging-arm and terminating at one end in the needle head, a reciprocating needle-carrying bar in the needle head, first means responsive to rotation of the first shaft for imparting reciprocation to the needle-carrying bar, a second rotary shaft extending longitudinally of the base, second means at least partly within the standard for imparting simultaneous rotation to the shafts, de vices in the base responsive to rotation of the second shaft for cooperating with the needle in the formation of stitches in a piece of work, third means for delivering lubricant from the reservoir to the first shaft and the first means, said third means comprising an upstanding conduit passing through the top wall of the reservoir-and establishing direct communication between the lubricant reservoir and the lubricant compartment and a disc carried by the second shaft, said disc being arranged to project into the lubricant in the reservoir and sling it into the conduit in response to rotation of the second shaft, a sump in the standard at the juncture of the standard and the overhanging arm, .said sump being enemas disposed under the compartment and the first shaft for collecting excess lubricant delivered to the first shaft, and a second conduit wholly within the confines of the frame connecting the sump and the reservoir for returning excess lubricant from the sump to the reservoir.

3. In a sewing machine comprising a frame having a base, a vertical standard rising from one end of the base, an overhanging arm projecting laterally from the standard over the base, a lubricant compartment in the upper portion of the frame at the juncture of the overhanging arm and the standard, and a needle head at the end of the overhanging arm remote from the standard, said standard, overhanging arm and needle head being hollow, said base defining a lubricant reservoir that is disposed at least partially beneath the standard, a first rotary shaft extending longitudinally of the overhanging arm and terminating at one end in the needle head, a reciprocating needle-carrying bar in the needle head, first means responsive to rotation of the first shaft for imparting reciprocation to the needle-carrying bar, a second rotary shaft extending longitudinally of the base,- second means at least partly within the standard for imparting simultaneous rotation to the shafts, devices in the base responsive to rotation of the second shaft for cooperating with the needle in the formation of stitches in a piece of work, third means for delivering lubricant from the reservoir to the first shaft and the first means, said third means comprising an upstanding conduit establishing direct communication between the lubricant reservoir and the lubricant compartment, said conduit including an arcuate lower portion disposed in the reservoir and having an inner longitudinal slot, and a disc carried by the second shaft and registering with said slot, said disc being arranged to project into the lubricant in the reservoir and sling it into the conduit in response to rotation of the second shaft, and a conduit for returning excess lubricant from the overhanging arm to the reservoir.

4. In a sewing machine comprising a frame having a base, a vertical standard rising from one end of the base, an overhanging arm projecting laterally from the standard over the base, a lubricant compartment in the upper portion of the frame at the juncture of the overhanging arm and the standard, and a needle head at the end of the overhanging arm remote from the standard, said standard, overhanging arm and needle head being hollow, said base defining a lubricant reservoir that is disposed at least partially beneath the standard, a first rotary shaft extending longitudinally of the overhanging arm and terminating at one end in the needle head, a reciprocating needle-carrying bar in the needle head, first means responsive to rotation of the first shaft for imparting reciprocation to the needle-carrying bar, a second rotary shaft extending longitudinally of the base, second means at least partly within the standard for imparting simultaneous rotation to the shafts, devices in the base responsive to rotation of the second shaft for cooperating with the needle in the formation of stitches in a piece of work, third means for delivering lubricant from the reservoir to the first shaft and the first means, said third means comprising an upstanding conduit establishing direct communication between the lubricant reservoir and the lubricant compartment, said conduit including an arcuate lower portion disposed in the reservoir and having an inner longitudinal slot, and a disc carried by the second shaft and registering with said slot, said disc being arranged to project into the lubricant in the reservoir and sling it into the conduit in response to rotation of the second shaft, a sump in the standard at the juncture of the standard and the overhanging arm, sald sump being disposed below the compartment and the first shaft for collecting excess lubricant delivered to the first shaft, and a conduit wholly within the confines of the frame and establishing direct communication between the sump and the reservoir for I0 returning excess lubricant from the sump to the reservoir.

5. In a sewing machine comprising a frame having a base, a vertical standard rising from one end of the base, an overhanging arm projecting laterally from the standard over the base, and a needle head at the end of the overhanging arm remote from the standard, said standard, overhanging arm and needle head being hollow, said base defining a lubricant reservoir that is disposed at least partially beneath the standard, a support within the frame in the region of the juncture of the standard and the overhanging arm, said support defining at least a portion of a lubricant compartment, a partition across the interior of the frame in the region of the juncture of the overhanging arm and the needle head, a first rotary shaft extending longitudinally of the overhanging arm and terminating at one end in the needle head, said shaft being mounted for rotation in the support and the partition, a reciprocating needle-carrying bar in the needle head, first means responsive to rotation of the first shaft for imparting reciprocation to the needle-carrying bar, a second rotary shaft extending longitudinally of the base, second means for imparting simultaneous rotation to the shafts, devices in the base responsive to rotation of the second shaft for cooperating with the needle in the formation of stitches in a piece of work, third means for delivering lubricant from the reservoir to the first shaft and the first means, said third means comprising an upstanding conduit establishing direct communication between the lubricant reservoir and a lubricant compartment in the overhanging arm, said conduit including an arcuate lower portion disposed in the reservoir and having an inner longitudinal slot, and a disc carried by the second shaft and registering with said slot, said disc being arranged to project into the lubricant in the reservoir and sling it into the conduit in response to rotation of the second shaft, a sump in the standard at the juncture of the standard and the overhanging arm, said sump being disposed below the compartment and the first shaft for collecting excess lubricant delivered to the first shaft, and a conduit wholly within the confines of the frame and establishing direct communication between the sump and the reservoir for returning excess lubricant from the sump to the reservoir.

6. A sewing machine in accordance with claim 5, wherein the disc has at least one peripheral notch.

7. In a sewing machine comprising a frame having a base, a vertical standard rising from one end of the base, an overhanging arm projecting laterally from the standard over the base, a lubricant compartment in the upper portion of the frame at the juncture of the overhanging arm and the standard, and a needle head at the end of the overhanging arm remote from the standard, said standard, overhanging arm and needle head being hollow, said base defining a lubricant reservoir that is disposed at least partially beneath the standard, a first rotary shaft extending longitudinally of the overhanging arm and terminating at one end in the needle head, a reciprocating needlecarrying bar in the needle head, first means responsive to rotation of the first shaft for imparting reciprocation to the needle-carrying bar, a second rotary shaft extending longitudinally of the base, second means for imparting simultaneous rotation to the shafts, devices in the base cooperating with the needle in the formation of stitches in a piece of work, third means in the base and at least partially exterior the reservoir for operating the devices in response to rotation of the second shaft, fourth means for delivering lubricant from the reservoir to the third means, and fifth means for returning excess lubricant delivered to the third means to the reservoir, said fifth means comprising a sump in the base for collecting excess lubricant delivered to the portion of the third means exterior the reservoir and a rotary pump having an inlet communicating with the sump and an outlet communicating with the reservoir, sixth means for effecting operation of the pump in response to rotation of the second shaft,

1'! seventh means for delivering lubricant from the reservoir to the first shaft and the first means, said seventh means including a first conduit within the confines of the frame and establishingdirect communication between the reservoir and the lubricant compartment and means for transmitting liquid lubricant upwardly through the conduit in response to rotation of the second shaft, and a second conduit for returning excess lubricant from the overhanging arm to the reservoir.

8. A sewing machine in accordance with claim 7, wherein the sixth means comprises a friction driving con nection and wherein the first conduit communicates with a second sump in the standard in the region of the juncture of the standard and the overhanging arm, said second sump being disposed under the compartment and the first shaft, and wherein the second conduit is wholly within the confines of the frame and establishes direct communication between the second sump and the reservoir.

9. A sewing machine in accordance with claim 7, wherein the sixth means comprises gearing connecting the pump to the second shaft, and wherein the first conduit communicates with a second sump in the standard in the region of the juncture of the standard and the overhanging arm, said second sump being disposed under the compartment and the first shaft, and wherein the second conduit is wholly within the confines of the frame and establishes direct communication between the second sump and the reservoir.

10. A sewing machine in accordance with claim 7, wherein the first conduit is upstanding and establishes direct communication between the reservoir and the compartment and includes a disc carried by the second shaft, said disc being arranged to project into the lubricant in the reservoir and sling it into the first conduit in response to rotation of the second shaft.

11. In a sewing machine comprising a frame having a base, a vertical standard rising from one end of the base, an overhanging arm projecting laterally from the standard over the base, a lubricant compartment in the upper portion of the frame at the juncture of the overhanging arm and the standard, and a needle head at the end of the overhanging arm remote from the standard, said standard, overhanging arm and needle head being hollow, said base defining a lubricant reservoir that is disposed at least partially beneath the standard, a first rotary shaft extending longitudinally of the overhanging arm and terminating at one end in the needle head, a reciprocating needle-carrying bar in the needle head, first means responsive to rotation of the first shaft for imparting reciprocation to the needle-carrying bar, a second rotary shaft extending longitudinally of the base, second means for imparting simultaneous rotation to the shafts, devices in the base cooperating with the needle in the formation of stitches in a piece of work, third means in the base and at least partially exterior the reservoir for operating the devices .in response to rotation of the second-shaft, fourth means for delivering lubricant from the reservoir to the third means, fifth means for returning excess lubricant delivered to the third means to the reservoir, said fifth means comprising a sump in the base for collecting excess lubricant delivered to the portion of the third means exterior the reservoir and a rotary pump having an inlet communicating with the sump and an outlet communicating with the reservoir, sixth means for effecting operation of the pump in response to rotation of the second shaft, seventh means for delivering lubricant from the reservoir to the first shaft and the first means, said seventh means including an upstanding first conduit within the confines of the frameand establishing directcommunication between the reservoir and the lubricant compartment, said conduit including an arcuate lower portion disposed in the reservoir and having an inner longitudinal slot, eighth means for transmitting liquid lubricant upwardly through the conduit, said eighth means comprising a disc carried by the second shaft and registering with the slot, said disc being arranged to project into the lubricant in the reservoir and sling it into the conduit in response to rotation of the second shaft, and a second conduit for returning excess lubricant from the overhanging arm to the reservoir.

12. In a sewing machine comprising a frame having a base, a vertical standard rising from one end of the base, an overhanging arm projecting laterally from the standard over the base, and a needle head at the end of the overhanging arm remote from the standard, said standard, overhanging arm and needle head being hollow, said base defining a lubricant reservoir that is disposed at least partially beneath the standard, a support within the frame in the region of the juncture of the standard and the overhanging arm, said support defining a lubricant compartment, a partition across the interior of the frame in the region of the juncture of the overhanging arm and the needle head, a first rotary shaft extending longitudinally of the overhanging arm and terminating at one end in the needle head, said shaft being mounted for rotation in the support and the partition, a reciprocating needle-carrying bar in the needle head, first means responsive to rotation of the first shaft for imparting reciprocation to the needle-carrying bar, a second rotary shaft extending longitudinally of the base, second means for imparting simultaneous rotation to the shafts, devices in the base cooperating with the needle in the formation of stitches in a piece of work, third means in the base and at least partially exterior the reservoir for operating the devices in response to rotation of the second shaft, fourth means for delivering lubricant from the reservoir to the third means, fifth means for returning excess lubricant delivered to the third means to the reservoir, said fifth means comprising a sump in the base for collecting excess lubricant delivered to the portion of the third means exterior the reservoir and a rotary pump having an inlet communicating with the sump and an outlet communicating with the reservoir, sixth means for effecting operation of the pump in response to rotation of the second shaft, seventh means for delivering lubricant from the reservoir to the first shaft and the first means, said seventh means including an upstanding first conduit within the confines of the frame and establishing direct communication between the reservoir and the lubricant compartment, said conduit including an arcuate lower portion disposed in the reservoir and having an inner longitudinal slot, eighth means for transmitting liquid lubricant upwardly through the conduit, said eighth means comprising a disc carried by the second shaft and registering with the slot, said disc being arranged to project into the lubricant in the reservoir and sling it into the conduit in response to rotation of the second shaft, and a second conduit for returning excess lubricant from the overhanging arm to the reservoir.

References Cited in the file of this patent UNITED STATES PATENTS 1,936,372 Waterman Nov. 21, 1933 2,206,285 Kaier July 2,1940 2,286,441 Saner June 16, 1942 2,311,604 Zeier Feb. 16, 1943 2,317,240 Zeier Apr. 20, 1943 2,393,815 Saner et a1. Jan. 29, 1946 2,596,728 Saner et a1 May 13, 1952