US1276358A - Sewing-machine. - Google Patents

Description

s. mu. sfwme MACHINE. PRLICATCN' FILED, AUGJB, 19H5A Sv www www G. S. HILL.

SEWING MACHINE.

APPUcAnoN min Amma, me.

wem-ed Aug. 20, 191B.

3 SHEETS-SHEET 2` Umrsnsmmg p ANEW HAMPSHIRE, .AssIGNora BY MESNE ASSIGN- GEORGE s. mtr., or. samrronn,

'r ortica.

MENTS, '1 0 UNITED l,SHOE MACHINERY CORPORATION, OFPATERSON, NEW JERSEY,

A CORPORATION 0F JERSEY.

SEWING-MACHINE.

ySpecification of Letters Patent.

Application lcd'ugust 28, 1916. Serial 11o/117,241.

-Tolall whom t may concern.'

Be it known that I, GEORGE S. HILL, a citizen of the United States, residing at Stratford, inthe county of Stratford and State of New Hampshire, have invented certain new and useful Improvements in Sewing-Machines; and I do hereby' declare'the following to be a full, clear, and exact description ofthe invention, such as will en'-A able othersskilled in the -art to which it appertains to make'and use the same.

The invention relates to machines for sewing overseam's. 1

The object of the invention is to provide novel and improved looper and loop spreader mechanism for'coperating with the vertically reciprocating needle or needles of the sewing mechanism, which will operfat-e 'in a uniformly reliable manner, and

which is well adapted for high speed `operation. To this end the invention comprises the features of construction and combinations of pants hereinafter"described and referred to in the claims, ythe advantages of which will be vapparent to those skilled in the art from the following detailed description of the mechanisms shown in the raccompanying drawings which embody 'the preferred form of the invention. y

In the drawings, Figure 1 is a sectional elevation showing so much of a buttonhole sewing machine as is necessary to illustrate the application of the present invention thereto; Fig. 2 is a partial transverse sectional elevation on line 2, Fig. 1; Fig. 3 is a detail plan view of the-turret which carries the under sewing mechanism; Fig. 4 is a sectional elevation on line 4, Fig. 3; and Figs. 5 to 15-are views showing the inode of operation in forming the ove'rseam4 stitches, Fig. 7 being a sectional view taken on line 7, Fig. 5, Fig. 8 being a sectional view taken on line 8, Fig. 6, and Fig. 15 being a secf tional view taken o'n line 15, Fig. 14.

In the drawings the invention is shown as embodied in a buttonhole making machine having the same general construction and mode of o eration as the machine shown and descri ed in application Serial No. 104,449, tiled June v19, 1916. T he machine comprises in general a cutter which operates tol cut the buttonhole slit after the completion of the sewing, a reciprocating and laterally moving work clamp, and a sewing mechanism which isl rotated during the sew# ing about the eye of the buttonhole, and which comprises a verticallyl reciprocatingl and laterally vibrating orjogging upper needle and coperatingjlooping and loop spreading devices arranged belowl the work and including a thread carrying looper.

Patented aug. 20,1918..

In the machine shown the work clamps,

indicated. at 2, are mounted upon work supportmg plates .4, which are pivoted'f on Ia longitudinally and 1aterallymovingclamp carriage 6. a The clamps are automatically closed at the beginning of the sewing, and are automatically opened after the completion of the buttonhole,"by mechanisml which formsvno part of the present invention, and

which needlnot be described. The button. A hole slit is cut after lthe completion ofthe sewing by a cutter 8 operated byacam'oia,

the main cam shaft of the'machine. The

vreciprocate below the throat plate and to alternately enter loops thrown out by the needlel during its successivevr reciprocations.

The looper point 18 is. `constructed to. takeV a loop of needle thread and carry it forward'4 into position for the passage of the needlenf4 therethrough during itsneXt reciproca-tion.

'This looper,lafter it has taken the loop of needle thread, is moved. laterally, and to insure the proper spreading and positioning of the. loop of needle thread. a thread retaining fingerQO is provided which is arranged to engage one side of the loop ofneedle thread as the looper moves transversely, and to spread and retain thisv loop in proper positionfor the passage of the upper needle therethrough. The-,thread retaining linger is preferably arranged to project obliquely from the lower part of the ythroat plate and across the path of the thread leading from the looper point to the seam when the looper has carried the needle loop forward and is about to move transversely. The looper point 16 is provided looper point 1S through a needle loop.

with a. thread guide and thread eye through which an under thread is threaded. This looper acts to carry a loop ot under thread ,through a loop otwneedle thread and this loop of under thread is spread tor the passage ot the needle therethrough by ay spreader point 22 mounted to move with and enter the loop with the looper point, and then to nieve transversely to spread the loop of under thread.

ln the preferred construction shown, the looper point 16 is secured in the arm elan oscillating rsupport or carrier 2l, and the transversely movable looper point 18 and spreader point 22 are secured in the arms ot a. carrier lever 26 which is mounted on the oscillating support 2l to move about an axis substantially at right angles to the axis of the support. The support 24 is provided with tivo separated bearings QS mounted to turn on the inner ends ot studs 30 which are secured in lugs projecting' trom the upper edge of the turret 12. The support is oscillated through a link comprising a tubular partBQ, `to the upper end et which is secured an arm 3l connected to the support. rllhe lower end of the link is connected by a ball joint with the torivard end of a lever 3G, which is rocked to oscillate the support by a three-cornered eccentric 58 secured to the sewing shaitt lll., and engaging a fork l2 on the ripper end or a link del, the levier end oi which is connected to the rear end the lever. 'lhe carrier lever 2e is mounted on a pivot d6 arranged on the support between and at right angles to the pivot studs 30. `The lever is provided with a horizontal arm 48 arranged substantially in the axis ot the support 2l, and having its outer end connected by a ball and socket oint to the up per end of an arm 50, the lower end ot which is secured to the upper end of a tube which extends down through the tube 32, and is connected at. its loivery end by a ball joint tothe Jorivard end ot a lever 5l rThe lever 5l is rocked to oscillate the carrier 26 by an eccentric 56 on the needle shaft 5S which engages the upper end. ot' a link 60, the loiver end of which is connected to the lever. Since the needle shaft 58 is geared to make tivo revolutions for each revolution, of the sewing shaft 4G, the carrier "26 will be oscillated during the movement of thesup-- port '24 in each direction to impart transverse movements to both the looper point lil and the spreader point y rThe mode or' operz 'en ot Athe sewing mechanism in forming the oversealm stitches is illustrated in Figs. to 15. During the depth stroke of the needle the support 9A is rocked toward the let't to pass the end ol: the The forward movement of the looper point can ries this loop to the let't into the positionindicated in l? ig. During the final move ment of the looper point toward the lett, the needle thread leading -from the end' of the looper point to the seam is brought in liront of the thread retaining linger 20, and the carrier lever 26 is rocked to more the looper point transversely :icrossf'the needle path, During this transverse movement of the looper point the seam side ot the-needle loop is held or retained by. the retainer linger7 so that the loop of needle thread is ade-y quately spread and retained in position to insure the passage of the needle therethrough during its next slit stroke, as indicated in Fig. G. lVhen the looper point lis withdrawn. from the needle loop the loop readily disengages itseli3 from the retaining linger. so that it may be drawn into final position in the seam. After the needle-has entered the loop of thread, the support Qll'is rocked toward the right, and at the saine time the carrier lever 26 is rocked on its pivot to bring the spreader point Q2 over the threaded looper 1G aud inte position to pass through the needle loop with .the looper point, shown in Figs. 9 and 10. luring thecontinued movement of the support toward the right, the looper point 1G and spreader point Q2 are passed through the needle loop, the position of the points as they enter the needle loop being indicated in Tdigs. 11 and 12. During the final movement oli the looper and spreader points toward the right? carrier lever 26 is rocked to move the spreader point transversely of the direction oit ltravel et the looper to spread the loop we of under thread and present it in position 'for the passage of the needle therethrough during its next depth stroke, as indica-ted in Figs. 13 and 14. The support 24 is then again rocked toward the lett, and during the 105 iii-st part ot the movement the carrier lever 26 is rocked on its pivot to return the spreader point into position over the looper point 16, and to return the looper point 18 into position to again pass through a neelio dle loop thrown out by the needle in its depth stroke.

rl `he mechanism for vibra-ting or jogging the needle 14 comprises a vertically reciprocating and laterally vibrating carrier sleeve 'lla 69; within which the needle bar 64C recipio cates. The carrier sleeve is reeiprocated vertically through a bell crank lever 66, the horizontal arm of which is connected by a ic it with the upper end of the sleeve, We and tie vertical arm ot' which is connected hy a link 68 with an eccentric on the sewing shaft Ll-O. The lovver end ot the sleeve is moved laterally by a link 70, one end of which is connected to the sleeve, and the las other end otivhich is connected with a pivot 72 on a rotary yhead 74., lWhen the sleeve is moved downward the link acts to swing the lower end et the sleeve and the needle har toward the right, so that the needle har Will is@ Stil reciprocation, so that the needle will bei` vibrated or jogged to alternately form the depth and edge or slit stitches.

The rotary, head 74 in which the carrier sleeve and needlebar are carried, and the rotary turret 12 in which the looper mechanism is carried, are rotated in unison during the sewing about die eye of a buttonhole through shafts 80: and 8:2 geared to the head and turret, and operated by connected gear segment levers Si and 86, one of which is provided with anarm carrying a roll engaged by a cam on'the cam shaft ofthe machine.

Vhile the invention has been shown and described as embodied in a machine for sewin a two-thread overseam and in which the upper thread is carried ly a transversely vibrating needle, andy in which the sewing mechanism is mounted to rotate during the sewing, it will be understood that the invention is notconned in application to such a machine, but may be embodied with advantage in other types of machines. It will 'also be understood that the invention is not limited to the specific construction and Varrangement of parts shown and described, but maybe embodied in other constructions, Ythe specific construction and arrangement of parts being varied or modified as found desirable or best suited to the machine ormechanism in which the invention is to be embodied.

Having-explained the nature and object of the invention, and specifically described one lform of mechanism in which it may be l embodied, what is claimed is 1. A sewing machine, having, in combination, upper needle mechanism above the work, a reciprocating and transversely moving looper pointbelow the work for taking and carrying a needle loop, a thread retainer to which the loopis carried by the looper ai d cooperating therewith to spread the loop of'needle thread, an'opposed and alternately acting threaded looper, and a spreader point moving with and transversely of the threaded looper.'

2. A sewing machine, having, in combination, an upper needle mechanism above the work, a reciprocating support below the work, a threaded. and an opposed unthreaded looper carried on the support, aloop ,spreader point c'operating with the threaded looper, a thread retainer to which a needle loop is-carriedx.,by`the unt 'feaded looper and coperatingwith the4 @l spread the needle loop, and mechanism for moving the unthreaded looper and spreader point transversely. e,

3. A sewing machine,having, in combination, a reciprocating and laterally jogging, upper needle, two opposed looper points be-l low the work, one of which is threaded, mechanism 'for reciprocating the looper points and for moving the unthreaded lodper transversely across the needle path, a thread. retainer to which the loop of needle thread is carried by the unthreaded looper, and a spreader point moving with and transversely of the threaded looper.

4. A sewing machine, having, in combination, an upper needle mechanism above the work, a reciprocating support below the work, a carrier mounted to move with and .transversely of the support, a threaded looper on the support. acooperating spreader point and an' opposed unthreaded looper on the carrier, and a stationary threadv retaining finger for coperating with the unthreaded looper to spread a needle loop. K,

5. A sewing machine, having, in combination, an `upper needle mechanism above the work, an oscillating support below the work,

-a carrier mounted o'n the support to oscil- GEORGE s. HILL.

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