US2291098A - Lubricating device for sewing machine loop takers - Google Patents

Description

w. MYERS 2,291,098

LUBRIGATING DEVICE FOR SEWING MACHINE LOOP-TAKERS July 28, 1942.

Original Filed Oct. 14, 1939 \QNt Patented `uly 28, 1942 UNITED STArsi-Ef-.S- PATENT-f err-ICE LUBRICATING. DEVICE Fon SEWING MACHINE LooP TAKEES..

Walter Myers, vlvrgidgleport,v Conn., assigner to` The Singer Manufacturing Company, Elizabeth, N. J., a corporationof NewV Jersey Original application October -lfl-I, 1939,l Serial No. 299,415. Divided. and this applicationoctober. 25, 1940, Serial No. 362,744 i 2Claims.. (Cl. 1127-256) This invention relates tosewing machine looptakers, and more particularly to"looptakers.of the vertical-axis rotaryhook typehaving a raceway providing. a bearing forv a thread-carrier journaled in the loop-taker and restrainedY In the accompanying drawing, Fig. 1 is a top plan View of the loop-taker end portion of the bed-plate of a two-needle sewing machine containing the present improvements, the throatplate and side slide-plates of the bed-plate being removed. Fig. 2 represents a perspective View of the bobbin-carrier. Fig. 3 is an enlarged vertical section of portions of one of the loop-takers and its bobbin-carrier, the section being taken substantially on the line 3 3, of Fig. 1.

This application is a division of application .Serial No. 299,415, led Oct. 14, 1939, which has resulted in Patent No. 2,236,830, dated April 1, 1941.

The sewing machine shown in the drawing has a frame including a Work-supporting bedplate I Il provided with an elongated opening II exposing the loop-taker mechanisms disposed below the bed-plate. The machine illustrated in the drawing as containing the present improvement has two loop-takers which are substantially alike in construction and mode of operation, so that the description of one of the loop- .takers is equally descriptive ci the other.

The loop-taker I2 has a cup-shaped body provided with a loop-seizing beak I3. The inner side face of the loop-taker body, at the upper or rim portion thereof, is partly cut away to provide a shouldered recess constituting a thread-carrier raceway comprising a vertically cylindrical bearing-wall I4 and a horizontally extending bearing-ledge I5.

Journaled in the loop-taker raceway is an interrupted bearing-rib I6 of a thread-carrier II,

said lbearing-rib.being retained in the loop-taker raceway by a ,substantially iiatl gib Iii-'detachablysecuredupon the loop-taker rim by screws` IS. Thejgib is constructed substantiallyY like that .more fullydisclo's'ed in. my prior U. S. PatentNo. 1,917,771, Julylll, 1933.. Onevend of the interrupted bearing-rib` I6 of the thread-carrier provides a vertically inclined thread-loop 'detaining shoulder 20.

The thread-carrier I'I has an interrupted peripheral flange 2| spaced vertically from the bearing-rib I6 and also overhanging the threadcarrier retaining gib I8 of the loop-taker, said gib I8 extending into thel circumferential recess or groove formed in the outer wall of the threadcarrier by the vertically spaced ange 2l and bearing-rib I6 thereof. The flange ZI has a beveled or vertically inclined portion 22 at the thread-loop cast-on side of the thread-carrier directly above the end portion of the bearingrib I6 which provides the thread-loop detaining shoulder 20 of the thread-carrier.

Adjacent its opposite end, the iiange 2| of the thread-carrier is provided with an upwardly open oil-pocket 23 elongated circumferentially of the thread-carrier and preferably containing an oil-absorbent material 215. By providing the oil-pocket in the peripheral ange 2|, thesize of the pocket may be made large enough to hold a substantial quantity of lubricant, Without modifying the thread capacity oi" the threadcarrier.

Opening into the bottom wall ci the oil-pocket 23 is the upper end of a vertical oil-duct 2,5 formed by an aperture provided in tjhe portion of the side wall of the thread-carrier between the ange 2| and the bearing-rib i6. T he lower end of the vertical oil-duct 25 terminates in the inner end of a radial oil-duct aperture 23 extending horizontally through the `bearing-rib and open at its outer end to the loop-taker raceway. The oil-pocket 23 being open at the top thereof, the oil may be conveniently supplied thereto as required, and the voil contained in the wick-filled pocket 23 will gravitationally nd its way into the vertical duct 25 and will then be supplied to the loop-taker raceway through the duct 25. It will thus be noted that the oil is conned to pass from the oil-pocket 23 to said raceway.

As more fully explained in my prior application Serial No. 299,415, the thread-carrier II is restrained against rotation with the loop-taker I2 by horizontally arcuate fingers 21 of a rocking escapement device, said fingers being adapted to enter arcuate apertures 28 provided in the flange 2| of the thread-carrier I1 at substantially diametrically opposing sides of the threadcarrier. By restraining the thread-carrier against rotation with the loop-taker, the tendency is to overheat the parts because of bearing friction. The present improvement provides simple means for reducing the friction-induced heating to a Having thus set forth the nature of vthe invention, what I claim herein is:

1. A vertical-axis rotary loop-taker for sewing machines, having a cup-shaped body provided with a thread-carrier raceway, a threadcarrier having a peripheral bearing-rib journaled in said raceway and having a peripheral flange overhanging said bearing-rib, said flange being spaced vertically from said bearing-rib and provided with an upwardly open oil-pocket lengthwise extending circumferentially of said thread-carrier, a gib secured upon said rotary loop-taker and disposed between said bearingrib and iiange of the thread-carrier, an oil-duct in the side wall of said thread-carrier extending downwardly from the bottom wall of said oilpocket, and a radial oil-duct in said threadcarrier connecting said downwardly extending oil-duct with said raceway of the loop-taker.

2. A vertical-axis rotary loop-taker for sewing machines, comprising an upwardly open cupshaped body having its inner face at the rim portion thereof cut away to provide a circumferentially extending vertical bearing-wall and a circumferentially extending horizontal bearing-ledge together forming a thread-carrier raceway, a thread-carrier having a. peripheral bearing-rib journaled in said raceway, a peripheral ilange extending from said threadcarrier and provided with an upwardly open and wick-lled oil-pocket, said ange being spaced vertically from and overhanging said bearingrib, thereby forming a circumferential recess in the outer wall of said thread-carrier between said flange and bearing-rib, a gib detachably secured upon the rim of said loop-taker and extending into said recess, an oil-duct extending through said bearing-rib from the outer face thereof and terminating at its inner end in the side wall of said thread-carrier, and an oil-duct connected with the bearing-rib oil duct and extending downwardly from said oil-pocket within the side wall of said thread-carrier between said flange and bearing-rib.

WALTER MYERS.

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