US1843896A - Ornamental seam sewing machine - Google Patents

Description

3 Sheets-Sheet l dbbo': wma

Feb. 2, 1932. F. M. CARD OHNAMENTAL sEAM SEWING @CHINE Filed June 9, 1930 Feb. 2, 1932. F. M. CARD ORNAMENTAL SEAM SEWING MACHINE 5 Sheets-Sheet 2 Filed June 9, 1950 Feb. 2, 1932. F. M. CARD ORNAMENTAL SEAM SEWING MACHIE Filed June 9. 1950 3 Sheets-Sheet 5 Patented Feb. 2, 1932 i UNITED .1s raras P ATSENTtorri-cn 'A FREDERICM; CARD, kon iseinem@om.;.commentaire` AssIeNoR/uio mitnsin-annimmt:-

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JERSEY Vj ORNAMENTALf-SEAM SEWING' VIlAGI-IIjNZll 'Application filedfJun-e',y l), l1930. Serialio. 459.8575. l

This invention relatesv to improvementsgin ornamental seam sewing `machines and. has for its primary objectto increase, in a simple manner, the range of production ofmachines of this type. y

The object and advantages in View,` together with `:means whereby the same mayy be carried into effect, will best be understood from the ollowingdescription of a preferred embodiment thereof illustrated in theaccompanyingvdrawings, in which f I Fig. 1 is a Vrearside elevation, partly in section, of' theimprove-d ornamental seam vsewing machine 2 is a bottom plan view of 13 the machine-base and work-supporting arm.

Figx is ak'transverse ,section of the worksupporting Yarm adj acentthe stitching point. 'Eig 4 isatop plan view of a produced by the present mach-ine.y 3F ig. 5 isa horizontal section .of a portion of the machine bracket-l Y arm, illustrating, .in top planvieiv,` the needlebar4 controlling mechanism and omitting the A oil-guardbracket;V Fig. 6 is Vaperspective view, partly in section, of the needle-position controlling mechanism. Y. Referring to the. drawings, the sewing inachine hasa frame comprising a base 1 from `which projectsV a workrsupporting yarm Rising ronnthe basel is "thesta'ndard Bgoi a tubular bracket-arme, overhanging, arm 2 andterminating in a head 5,

Journaledin the bracket-arm vis a main actuating shaft 6 carrying atits outer end a combined belt-pulley `and 'balance-Wheel 7,

the

andiatv its oppositeend a crank-disk 8 con;r

Y nectedinthe usual' manner by means 'of a link'9 with a needleb'ar 10, carrying ajneedle 11. The needle-barlO is journaledfor end- Wise, substantially vertically "reciprocatory movements in suitable bearings provided in a swinging frame l`2piv'otally .supported at its upper end upon a` fulcrumfpin 13 secured inthehead 5to provide a frame-axistransverse to the axis ofV rotation of 'theg'fmain shaft-,6. "f Y f yCooperating with'theneedle 1l 'in the formation of lock-stitches is aflooptalzer ltyoi: the rotary hook type and l carriedjby ashort shaft15 j ournale'd 'in the free end lofthe-w'irlsupporting arm 2 so as to-be disposed transversely ofthe lpath of needle vib1atio1i.f""l`zhe loop-taker shaft 15 vcarries .a bevelgear 16' in ineshwitha similar gearl 17 uponone end of lshaft22 is a crank-*armV 124' carryinga pivotblock 25 slidingly :disposed infa suitable slot provided in afeed-barQf, upon whichfeed-` bar is secured Ya feed-"dog -27 operating free-end of the arm 2.

machine is actuated in Va Well .kno-wn manner to receive only one complete lrocking move` ment for three complete rotations `of the' Vmain-shaft 6, so thatfthe feed-dog 27is1p`1zo- 'jected above the throat-platefonce only dur:-v

ing three Ycomplete kneedle reciprocations'.

' Theactuating lmechanism ofthe rock-shaft 22 is disclosedfor instance, in the UQS.:Pat?k ent of W. Myers,A No.v 1,825,684, n Sept. '295 hrough a throat-platef28'secured upon the Y i The feed-lift roek-shaft'QQ of thepresent f and" 1931, andcomprises, in generahfa crank-arm i 29 clamped upon thexrock-shaftglZQand 'conv nected by a link 30 with a'rockflever' 31 fulcrumed upon the machine'bracketfarm. IThe rock-lever 31 carries al roller `32`tracking ,a

suitably shaped camgroo've 33 rprovided in the inner face of a camdisk ,84 fixed upona rotary shaft 35, journaled in thebracket-arm 4 belowan'd disposed transversely olffthe main-shaft'@ The cam-shaft 35 carriesa spiral gear '36 driven by a similar but smaller gear? fixed uponthe main-shaft 6f,t he pro# portions of the gears 36 and 37 being such that the, cam-'shaft 35 is rotated'. once only for` three" rotations ofthe main-shaftgjl K Y L'IolV impart workl'advaneingfand return lmovements to the feed-dog 27,"the'feedbajr .2.6 is'fpivotally conn'eotedwith a' crank-,arm

38 ofV a 'eedro'ck-'shaft ourna-ledin* bearlil' ings provided in a lug 40 within the worksupporting arm 2 and a lug 41 within the machine base l. Suitab'ly clamped upon the feed shaft 39 is a crank-arm 42 connected with a pitman 43 of which the upper end has a strap embracing an eccentric 44 adjustably secured in the usual manner u )on the mainshaft 6.

The swinging needle-bar frame 12 is pivotally connected with one end of a vibratory member 45 of which the opposite end has an offset arm 46 resting upon a cam 47 carried by the transverse cam-shaft 35.v As more fully disclosed in theV before mentioned patent of W. Myers, No. 1,825,634, the'arm 46 of the vibratory member 45 is yieldingly maintained in contact with the cam 47 by means of a spring 48 coiled about a vertically disposed rod 49 of which the lower end is pivotally connected with the member 45. The tapered upper end of the rod 49 is guided by and has sufficient clearance within a bushing 50, adjustably'threaded into an aperture in the bracket-arm 4, to provide for the relatively short, lateral vibrations imparted to the lower end of the rod by the needle jogging movements of the member 45. Preferably a swiveLwasher 5l is Vinterposed between the upper end of the spring 48 and the lower end of the bushing 50.

The cam 47 imparts lateral vibratory movements to the member 45 about its pivotal connection with the swinging frame l2. These vlateral movements of the member 45 are in part converted into endwise reciprocatory movements thereof by a fulcruming device for said member consisting of a link 52 pivot-ally connecting the member with a shouldered fulcrum-bolt 53 carried by an arm 54 suitably secured upon an adjusting shaft 55. The shaft 55 is substantially parof the member 45 to be. in part converte-d in an apertured bearing-boss 56 provided at the rear Vside of the bracket-arm 4. In the operation of the machine, the point of pivotal connection 52 of the link 52 with member 45 swings in an arc about the bolt 53 when the member is vibrated by the cam 47. llVhen the fulcrum-bolt 53 is located in an imaginary line connecting the axis of the cam-shaft 35 and the point of pivotal connection of the member 45 with the needle-bar frame, the swinging movements of the link 52 about the fulcrum-bolt 53 cause no appreciable endwise movement of the member 45 and consequently the needle-bar reciprocates vertically in a central or neutral path. However, when the fulcrum-bolt 53 is positioned either above 'or below said imaginary line,

there develops a component of motion of thel link 52 which causes the lateral vibrations of the member 45 to be in part converted into endwise movements thereof vwhereby jogging movements .are imparted to the needle-bareither to the left ortothe right of said neutral path of the needle-bar dependent upon whether the fulcrum-bolt is disposed above or below said imaginary line.

The mechanism hereinbefore described is embodied in commercial machine well known in the art and it was the prior practice to provide manually operated means for swinging the fulcrum-bolt 53 into fixed positions determining the desired extent of needle-jogging movements at the selected side of said neutral position. ln accordance with the present improvement, there is provided an actuating mechanism which maybe conveniently coupled with the fulcrum-bolt adjusting means for automatically changing the field of needle-jogging movements from one side to the other of the neutral position of the needle 'alternately with pairs of successive reciprocations of the needle in its neutral path of non-vibration. rThe feed-lift only between the successive reciprocations of the needle in said neutral path. To this end, a pinion 57 is secured upon the end of the cam-shaft 35 projecting rearwardly beyond its bearing in the bracket-arm, which pinion is in mesh with a spur-gear 58 carried by a stub-shaft 59 ournaled in a bearing aperture provided in a bracket 60 secured upon the rear side of the machine bracket-arm 4. In the present machine, the bracket 6() has at one end an apertured boss 6l mounted upon a reduced extension 62 of the bearing-boss 56 and secured thereupon by a screw 63. At its opposite end, the bracket 60 is connected by a shoulder bolt 64 to a supporting bar 65 secured by a screw 66 upon the bracket-arm 4. Detachably fastened to the under side of the bracket 60 is a segmental oil-guardbracket 67.

Suitably secured upon the spur-gear 58 is a cam-disk 68 having in its rear face a camgroove 69, the ratio of the gears 57, 58 being such that the cam-disk 68 is rotated at one half the speed of rotation of the cam-shaft 35, i. e., atone sixth the speed of rotation of the main-shaft 6. The cam-groove 69 is entered by a cam-roller 70 carried by a vibratory arm 7l having its hub 72 journaled upon the bracket-securing bolt 64. The vi- Y bratory arm 7l is provided with a fork 7 3 embracing a pivot-block 74 carried by an arm 75 of an elbow- lever 75, 76 having its hub 77 loosely journaled upon the adjusting shaft 55, i. e., upon an axis coincident with the axis of the shiftable fulcrum-bolt The lever-hub 77 is disposed between a shaft collar 78 and the hub 79 of an adjusting-arm 8O suitably secured upon the shaft 55. The

adj Listing-arm 80 has an apertured 8l adapted "'f' to be entered, in the alined position of the parts. by a coupling pin 82, shiftably disposed .in the aperture'd free end of the leverarm 76 and secured therein by a set-screw 83.

The vadjusting-arm 8O has a laterally bent v actuating mechanism is timed to be effective ies free end 84 overhanging a segmental eXtension 85 of the bracket 60. Threaded intothe overhanging end 84 of the adjusting-arm is a securing screw 86, which may be employed to lock the adjusting-arm to the stationary bracket-segment 85, in different selected psitions of said arm when the coupling pin 82 is withdrawn from the adjusting-armaperture 8l. Consequently, the machine may be employed as'heretofore, in effecting the production of lateral and return stitches at one ing said lever to thereby determine different paths of needle reciprocation, and means for ladjustably securing said adjusting shaft against movement in the disconnected condition of said coupling means.

In'testimony whereof I have signed my named to this specification.

Y FREDERIC M. CARD.

or the other side of the neutral position of the needle and in the non-feeding position of the feed-dog, it being understood that with the present timing of the parts, the feed-dog advances the work only between successive reciprocations of the needle while position.

`When it is desired to employ vthe vherein described mechanism for Vautomatically con-v trolling the adjustment of the position of the fulcrum-bolt 58, the adjusting-arm scouring screw 86 is released from engagement with the bracket segment 85 and the level'- arm 76 is connected with the adjusting armA 80 by means of the coupling pin 82. As thus operatively connected with the cam-actuated.

arm 7l, the adj Listing-arm 8Ov is intermittently shifted to change the positions of the fulcrum-bolt 53, whereby a seam as indicated in Fig. t of the drawings is produced by the stitch-forming mechanism. By changing the relat-ive timing of the parts, it is evident that several variations may be effected in the ornamental seam produced.

Having thus set forth the nature of the able support for said link, an arm carried by said adjusting shaft, a lever fnlcrumed upon an axis coincident with the axis of the adj usting shaft, coupling means connecting said lever and the adj Listing-shaft arm. and means for actuating said lever to intermittentlyk shift said link-support in a direction crosswise of the needle-jogging member.

2. In a sewing machine, a reciprocatory needle-carrying bar, a rotary needle-reciprocating shaft operatively connected With said bar, a cam-shaft disposed transversely of the needle-reciprocating shaft, a needle-jogging member actuated from said cam-shaft,V a

swinging link pivotally connected with said member, an adjusting-shaft carrying a shiftable support for said link, a'needle-jogging member controlling lever, means for disconnectibly coupling said lever and said adjusting-shaft, means for intermittently rockin its neutral Y CRTIFICATE or ooRREcTIoN'.

Patent No. 1,843,896. Granted February 2, 1932, to

FREDERIC M. CARD.

lt is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, line 42, strike out the words "of the member 45 to be in part converted" and insert instead the syllable and words allel with the cam-shaft 35 and is journaled, and line l25, for "apertured" read aperture; page 3, line 72, for "named" read name; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 29th day of March, A. D. 1932.

M. J. Moore,

(Seal) Acting Commissioner of Patents.

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