US2620759A - Machine used in the making of piped buttonholes - Google Patents

Description

1.9521 F. PANTUSCO EI'AL 2,620,759

MACHINE USED IN THE MAKING OF PIPED BUTTONHOLES Filed Oct. 16, 1950 I s Sheets-Sheet 1 Haw/r BAA/r0500 and/2 4100 Haw/5a,

MACHINE USED IN THE MAKING OF PIPED BUTTONHOLES I Filed Oct. 16', 1950 Dec. 9, 1952 F. PANTUSCO ETAL 3 Sheets-Sheet 2 INVENTORS A Fae/v.6)

Dec. 9, 1952 F. PANTUSCO ETAL MACHINE USED IN THE MAKING OF PIPED BUTTONHOLES ashets-sheet. 5

Filed 001.. 16, 1950 Fiewlwr Bwvrusco M24140 fisemaa/v,

. INVENTORS Amen 5X Patented Dec. 9, 1952 MACHINE USED IN THE MAKING or PIPED BUTTONHOLES Frank Pantusco, Brooklyn, and David Fischbein, New York, N. Y.; said Pantusco assignor to said Fischbein Application October 16, 1950, Serial No. 190,257

2 Claims.

improved machine to do the work mentioned and adaptable for making button holes of any desired lengths without adjustment or replacement of any machine part.

A further object hereof is to provide a machine of the character described, of novel and improved construction, whose slitting blade is operated and 7,

controlled in a novel manner.

Still another object of this invention is to provide a novel and improved machine of the type and for the purpose set forth, which is simple in I construction, easy to use and eflicient in carrying out the function for which it is designed.

Other objects and advantages will become apparent as this disclosure proceeds. 1

vIn the accompanyin drawings forming partof this specification, similar characters of refer-- ence indicate corresponding parts in all the views.

Fig. 1 is a pictorial showing of the work this machine accomplishes. As mere example, a singletape specially formed, is here used, as is already known in the art of making piped button holes.

Fig.2 is a bottom view of Fig. l, and specifically shows the slit made by this machine in the fabric or garment worked on, and the two lines of stitching securing the mentioned tape. At the same time the cutting blade included in this machine makes said slit, it likewise slits the tape. It is to be noted that the tape extends and is sewed on a bit beyond each end of the slit.

. Fig. 3 is a pictorial representation showing the tape as it leaves a forming device to bend it into the required shape. This view shows the tape as it'is being sewed onto the fabric or garment by parallel seams accomplished by a pair of needles and also shows the position of the slitting blade.

in relation to said needles as such components appear on the machine. 7

Fig. .4 is a pictorial showing of the forming device which may be used for forming the tape in This forming device is,

its required bent state. preferably carried by the presser foot of the machine. Said device is here shown as viewed from the rear of the presser foot.

Fig. 5 is a top view of said tape former means 2 carried on the presser foot, which is also here shown.

Fig. 6 is a fragmentary fantom perspective view showing a double-needle sewing machine embodying the teachings of this invention.

Fig. 7 is a top view of the machine, showing only those components which are used to explain this invention. The machine is here shown in condition when the blade operates to accomplish slitting on the work.

Fig. 8 is a fragment of Fig. '7. The machine is here shown when the blade does no slitting.

Fig. 9 shows a side View of a cam and its follower in their relative position when the machine condition is as illustrated in Fig. 8. Said components are part of the blade operating means in cluded in the embodiment herein chosen to set forth this invention.

In the drawings, the numeral l5 designates generally a double-needle sewing machine provided with a comparatively narrow slitting blade:

16 which is positioned in a vertical plane midway between, behind and perpendicular to the plane of the needles I! and I1, and also provided with means to control the slitting action of such blade; such means including an eccentric cam I 8 on the main drive shaft IQ of the machine and a follower denoted generally as 20, for

said cam. The free end of said blade l6 beingdownwardly, it is apparent that it can pierce the Work in the same fashion as the needles do.

The needles I! and I1 are mounted extending downwardly from the needle bar 2 I. The presser foot denoted generally by the numeral 22, is mounted onto the bottom end of the presser-foot bar 23. The slitting blade [6 is mounted on a suitable arm 24 at the bottom end of what may be called the blade-carrying bar 25. All of said bars or rods 2!, 23 and 25 are vertically positioned and are mounted for longitudinal sliding recipro-v catory movement on the frame of the machine head. As is well known in the sewing machine art, the needle rod 2| is reciprocated upon rotation of the machines main shaft I9, and the.

also the crank 30. The crank 29 is pivotally shall normally press against theperipheral surface of the cam I8. The crank 33' is pivotally linked to the blade-carrying rod 25, in any suit-.

-able fashion so that said rod shall reciprocate upon rocking movement of the -shaft 282: Ink:

the structure illustrated, such connection is-Aeffected by a pin 35 extending fromthe crank engaged by a clevis 36 securely .carried .on..the.:.

rod 25.

The cam I8 is in contact with the tines 31 and 38 of a clevis formed at an end of the-cam The diameter of the-camfollower member 2!]. I8 is equal to the distance-between the opposite surfaces of said. tines, which surfaces are respectively coextensive with the semi-circular concave surface 28', from Whose ends they ex tend .inparallel relation. The shaft I9 may be any other .shaft of .the. machine having continuous.rotation during machine operation; evident that. when shaft I9 turns in" the arrangementshown in Fig. 6,.shaft'"28 will-be rocked;

and the blade i 6 carried on the bar 25', will be reciprocated, and dimensions are" such that the blade. I B will pierce the work 39m'idw'ay between the "pair. of -stitch lines 740 and! accomplished bythe'needles I7 and Il'. The individual stitches are1very'close,"and the width of the blade 16 is such'that as it pierces the work, successive stabs thereof shall make a slit'in the work, as indicated A shaft" positioned across the machine head I 5 and journalled thereon, is fashioned at its forward end with a crank 43, and at its rear end, said shafticarriesa laterally extending finger M,

which is normally near, but out of the path of movement of the pins head 3|. Said finger is in" such position maintained, by means of a tensedtension coil spring 45,- whose ends areconn'ected-to' said finger at 46-, and to the frame at, respectively; Also, there is the stop screw 48""which rests on theframe; such screw being threadedly engaged in a pin extending from a collar 49 secured on shaft 43.

While *the machin is working, th operator whenever desired,-r nay bring the blade l 6' to rest in raisedpositionabove and out of contact with the"work 39, by merely moving the crank'43" downwardly, whereupon finger 44' will move into the-path of-the head of pin Bil-and act as a stop" for said pins' head 'as'in Fig. 8, and prevent the cam follower 29 from movement at the position-wheresaid follower is as shown'in'Fig. 9.-

Although the'cam' I8 continues to revolve, it

willineachrevolution contact the concave surrace-2e; but therewill be no swinging movemerit-of any appreciable extent of the shaft 28'.

'It' is to-be noted that the shaft I9,-'or anyother shaft chosen on which the canr'l8 .ismounted;

shall make at least one revolution per stroke of the needles. It is also advisable that the sizeof the head "3| should'be large enough so that the finger cannot beimoved into position'behind it;".'but:will be against the top'of said pins head:

3I," for no more than one revolution of the cams shaft, and fall into position against the peripheral surface of said head 3| at the outward limit ofimovement' of the cam follower 29.

The operator can let goof hold on the crank orh'andle 43, after the condition as shown in Fig. 8 is attained, and the cam follower 20 will remain in inactive position, because the spring 32 is comparatively stronger than the rather weak spring 45. However, whenever the operator wishes to set the blade I6 again in operation, he turnsthe handle 43 upwardly .so that finger Wis movedlawayfrom (the head :3 I of the pin 33; whereupon sprin 32 will shift and maintain the cam follower 20 so that its surface 20' is constantly in contact with the peripheral surface of the=camil8, wherebyithe blade I6 will operate to slitizth work. When the handle 43' is let go of operators hold, spring 45 will cause shaft 43 to turnlto initial ;rest 2 position determined when screw 48comes,--to.rest on the frame of the machine head I5. It is evident that the operator's hold on=the handle43 need be of very short duration whenever he wants the blade I6 to commence or cease operation, and ,lof special importance is that button hole slits42 of various lengths may be-made without change ofbladee- In the making-of a' piped button-hole, it is well known in the art to take a pair of 'longij-f tudinally foldedtapes and sew one 'alongeach side of a slit determining the button hole in the work. Theremaining manipulations to complete the piped button hole have no concern here in. Instead of using two separate tapes, a better" way is to'fold asingle tape in-the fo'rm of an inverted T -shaped" channel as indicated by the numeral 50 in Fig. 1, sew it over slit position by two stitch lines-shown at 40 and 4 I, and then slit through the tape 50 and the work 39, as shown at" 42.- Completionof the piped button' holefrom this point on is well known in-the art' and there fore needs no further explanation:

foot 22 in front of the needles. I this forming device is to fold .'the tape 50'"- so that said tape is in'the aforementioned inverted T-shaped channel form near needle position'ias shown evident inthe arrangement illustrated in Fig.5."

The forming device may be made'of' a strip of sheet metal formed to admittheitape 50" in. fiaticonditionet one end "as at 5 I and said piece of metal at theother'end is shaped ininverted T-form as a channel in which is suspended an inverted ..'l"-bar 52 by'means of a strap piece 53 soldered to'the metal piece as shown.

as shown in Fig.--8,- where the cam-followerc20 isheld against. movement sothat the-blade I6-is-.- at rest. He then takestheend of tape fifi'twhich; may come off a roll; andinserts it through the forming device 5|. up to the needle position. At

-each button hole-position to-bemade, thework- 39 is visibly marked with a chalk line along slit line A, and with cross lines..B..and C which-in dicate the ends of the slit tobe .made. He lifts the presserfoot 22 byliftingl lever .21., andhsets-i the work .39 under the presser foot so that line A v is central'of the. needles I1, I 1", and in the-plane of the plane of the needles.

whenthe'machineoperates, said formed tape will To set the machinefor .use, after needles are. threaded and shuttle .bobbinsare properly set,. the operator slo'wly. turns the handwhe'el55 to turnlthe shaft '.I9.' At the same time heobringsa: handle 43-Jdownward and eife'cts the conditionbe fed along with the work. He now sews on the tape up to line B, and quickly pushes handle 43' upward to release the cam follower 20, thereby changing the machine condition from that shown in Fig. 8, to that of Fig. '7. The blade I6 is thus set in operation, and he sews up to line C, whereupon the operator quickly pushes the handle 43 downward to hold the cam follower in position shown in Fig. 9, thereby changing the machine condition from that shown in Fig. 7 to that of Fig. 8. The blade stops in lifted position after cutting the slit #2 between the lines B and C. After sewing a few stitches beyond line C, the sewing is stopped, the tape 50 is out at line C, and the machine is ready to operate at the next button hole position. It is to be especially noted that without adjustment or replacement or parts, the machine can make button holes of various lengths on the same piece of work.

This invention is capable of numerous forms and. various applications without departing from the essential features herein set forth. It is therefore intended and desired that the embodiment shown herein be deemed, illustrative and not restrictive and that the patent shall cover all patentable novelty herein set forth; reference being had to the following claims rather than to the specific description and showing herein to indicate the scope of this invention.

We claim:

1. In combination, a double needle sewing machine having a constantly rotating shaft and effecting two parallel lines of stitches on a piece of work when in operation, a slitting blade having its cutting edge in a plane between the needles, a member movably mounted on said machine; said blade extending from said movable member, a first means operated by said shaft to reciprocate said member whereby the blade moves through the work; said first means comprising a cam securely carried on the shaft, a follower for said cam, a second shaft journalled on said machine, for rocking axial movement and securely carrying two cranks; one of said cranks being connected to the cam follower whereby said one crank will turn upon movement of said follower, and the other of said cranks being connected to the blade-carrying member whereby said member will be moved upon rotary movement of said second shaft and a second means actuated by the operator of the machine while the machine is in operation, to halt movement of said member at such position where the blade is out of contact with the work; the movement of the blade through the work, effecting a continuous slit in said work during every period said member carrying the blade is free for movement; said second means comprising a manually operated means to hold the cam follower in a position away from the influence of the cam.

2. In combination, a double needle sewing machine having a constantly rotating shaft and effecting two parallel lines of stitches on a piece of work when in operation, a slitting blade having its cutting edge in a plane between the needles, a member movably mounted on said machine; said blade extending from said movable member, a first means operated by said shaft to reciprocate said member whereby the blade moves through the work; said first means comprising a cam securely carried on the shaft, a follower for said cam, a second shaft journalled on said machine, for rocking axial movement and securely carrying two cranks; one of said cranks being connected to the cam follower whereby said one crank will turn upon movement of said follower, and the other of said cranks being connected to the blade-carrying member whereby said member will be moved upon rotary movement of said second shaft and a second means actuated by the operator of the machine while the machine is in operation, to halt movement of said member at such position where the blade is out of contact with the work; the movement of the blade through the work, effecting a continuous slit in said work during every period said. member carrying the blade is free for movement; said second means comprising a shaft journalled on the machine, for rocking axial movement, an element carried on this shaft, adapted upon movement of this shaft in one direction, to engage the cam follower when said follower is in position effected by the furtherest throw of the cam, a handle carriedon this shaft to turn the latter; the normal position of said engaging element being out of engagement with the cam follower to allow movement of said follower.

FRANK PANTUSCO. DAVID FISCHBEIN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,318,629 Waterman Oct. 14, 1919 1,426,466 Devoe Aug. 22, 1922 1,932,953 Card Oct. 31,1933

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