US2283691A - Tie stitching machine - Google Patents

Description

R. NAFTALI E1 AL 3 5 'T'IE STITCHiNC MACHINE May 19, 1942.

Original Filed March ll, 1937 2 Sheets-Sheet l INVENTORS RUDOLF NAFTALI VALENTINE NAFTALI 15 HERY NAFTALI,

ATTORNEY- May 1942' I R. NAFTALI EI'AL TIE STITCHING MACHINE Original Filed March 11, 1957 2 sh ets-sheet 2 INVENTORS lzu'boLF NAFTALI VALENTINE NAFTALI B HENRZ NAFTALJ '5 AT Y i Patented May 19, 1942 PATENT OFFICE,

2,283,691 rm s'rrrcnmc MACHINE Company, New York, N. Y.,

New Jersey a corporation of Original application March 11, 1937, Serial No.

Divided and this application August 11, 1939, Serial No. 289,522

7 v 11 Claims.

Our invention relates to sewing machines. More particularly, our invention is concerned with improvements to that type of sewing machines employed for stitching neckties, such for example as disclosed in our Patent No. Re. 19,653, dated July 23, 1935, in which there is employed a double pointed needle having its eye located between the points, the opposite ends of which, during the operation of the machine, are alternately grasped by the jaws of a pair of opposed needle bars arranged in alignment. I

One object of our invention is to provide a sewing machine of the character described having improved means for automatically stopping the operation of the machine after the complete stitching of each tie, so that the eye of the needle will always be in proper alignment for threading.

Other objects of this invention will in part be obvious and in part hereinafter pointed out.

Certain features shown and described but not claimed in this application are shown, described and claimed in' our copending application, Serial No. 130,252, filed March 11, 1937, for Tie Stitching machines, of which the presentapplication is a division, and our copending application, Serial No. 289,523, filed August 11, 1939.

The invention accordingly consists in the features of construction, combinations of elements, and arrangement of parts which will be exemplified in the construction hereinafter described, and of which'the scope of application will be indicated in the following claims.

In the accompanying drawings, in which is shown one of the various possible embodiments of this invention,

Fig. 1 is a side elevational view, partly'sectional,

of a tie stitching machine-constructed in accord- I ance with our invention;

Fig. 2 is an end view, partly sectional, of that 7 portion of the apparatus shown in Fig. 1, illustrating our novel means for automatically stop- Referring mdre particularly to Fig. 1 of the drawings, we have disclosed a sewing machine of the class above referred to, in which there isemployed a double pointed needle 20 having its eye located between the points, and which is caused to be alternately grasped by upper, and lower needle bars 22 and 23, respectively, after piercing the fabrics of a necktie to efiectively sew a line of stitching therethrough. A pair of pivotally mounted rocker arms 25 and 26 connected to the needle bars 22 and 23 by links 21, and

to a cam actuated plate 30 by means of links 29, cause synchronous oscillation of the said upper and lower needle bars to alternately clutch the needle 20 in the manner described in said Patent No. Re. 19,653 and copending application Serial No. 32,148. I

In the operation of sewing machines 0 character herein described for stitching neckties.

where a separate thread of suitable length isemployed for stitching each necktie, it is necessary to rethread the needle after the completion of the stitching or each necktie. Since in actual manufacturing practice a great many neckties are stitched on a single machine in one day, it is highly desirable-that the threading oi the'needle after each tie has beenstitchedbe accomplished with a minimum expenditure of time and with great accuracy, lest the needle be broken in the threading operation.

By our invention we have provided novel means arranged so that when the sewing machine has completed the stitching of a tie and the said machine is thereupon automatically stopped, the

ping the operation of the machine after the stitching of a tie;

Fig. 3 is a cross-sectional view taken substantially on the line 33 of Fig. 2; r Fig. 4 is an enlarged cross-sectional view take substantially on the line 44 of Fig 3; and

Fig. 5 is a schematic wiring diagram illustrating the operation of our invention.

Referring now in detail to the drawings, we have disclosed an apparatus embodying our invention, such apparatus being of the type disclosed in our Patent No. Re. 19,653 and copending application Serial No. 32,148, filed July 19, 1935.

eye of the needlewill be in proper alignmentwith respect to the threader 3|. The mechanism for automaticallycausing the machine to stop so that the eye of the needle 20 will be in such proper alignment ,will now be described in detail.

In the drawings, there is shown a fly wheel fixed to a collar 6| for rotation therewith, said .collar Bl being freely rotatably mounted on a fixed shaft 62 held' in a bracket 63 fixed to the frame F of the sewing machine, in the manner shown and described in our said copending application Serial No. 32,148. Also mounted on the collar 6| for rotation therewith is an annular cam 64, designed to actuate the rocker arms 25 and 26, as described in our said copending application. Suitable means are provided for driving said wheel 60 and cam 64, such as for example a belt 65 connected to a motor pulley which is driven'by a motor, not here shown, but which is shown inour said copending application.

By our invention we have devised a construc- 2 the 2 i I Y i l v tion whereby, when the, current is 'turned on from a source of supply, the means for operating the machine is held normally ineffective until a 'hand switch is thrown, which automatically rendersthe machine operating means effective for a predetermined period of time, such as for example the complete stitching of a tie, after 'which the said hand switch is automatically opened to break the circuit to again render the machine operating means ineffective. We have provided means for causing the machine to be stopped as in Figs. 2 and 3. The member 89 is pivoted to 18 "is released, as hereinbefore described, the

above described, ,so that the eye of the needle will be in proper alignment for threading. The

mechanism for carrying out the above will now be described. r

Mounted on the outer rim of the cam 64 is a fiat brake band 10 adapted to be normally held in .call'y cause braking action of the band 19, the

frictional engagement with a portion of the said cam by having one end 10a of said band pivotally attached to a suitably positioned fixed support 1| and the other end 1617 of said band being pivotally attached to a rocker arm 12. The rocker arm.12 is pivotally mounted on a wall 13 of the frame F by means of a fixed pivot 14, and is designed to normally hold the band 10 in frictional engagement with the annular cam 64 to prevent rotation thereof, by means of a spring 15 having one end thereof attached to the free end of the rocker arm, and the other end thereof being fixed to a pin 16 on the wall 13.

To render the brake band 19 ineffective against the action of the spring 15, there is provided a rod 11 attached at one end to an armature 18 by meansof a link 19 (see Fig. 3), forming a part of a pivotally mounted member 80, soon to be described. The rod 11 is pivoted to the link 19 at 81, while the link 19 is in turn pivotally connected to the armature 18 at 82. The other end of the rod 11 is adapted to pass through an aperture in a member 83 pivoted to the wall 13 at '84, said member having an extended portion 83a which is adapted to contact the rocker arm 12. The rod 11 is provided with an enlarged head 85 adapted tohold. a spring 86 in confinement between said head 85 .and the portion 83a. The spring 86 is designed to slightly ofi'set the action of the spring 15 and at the same time to prevent too rapid action of the brake band 10. For releasing the brake band from its eifective position, as shown in Fig. 2 of the drawings, there is provided a solenoid 81, mounted on the wall 13 and the lug 90 on the wheel 69 strikes the abutment which when energized by closing a hand switch,

the needle bars 22 and 23, as described.

When, after the complete stitching of a tie, the solenoid 81 becomes (automatically bythe opening ofthe hand switch) deenergized, the spring 15 will restore the rocker arm 12 to its normal position, such as shown in Fig. 2, to efiectively cause the band 16 to frictionally engage the cam 64. To insure that the upper needle bar 22 will receive the needle 20 and that the said needle bar 22 will stop ina position whereby .the eye of the needle will be in proper alignment with the threader 3| there is provided on the inner flat surface of the wheel a lug 99 which is adapted to abut against a specially designed abutment member .80, normally disposed in the, path of movement of said lug 90, as clearl sh abutmentmember 88 will ,be swung out of the path of v the lug 90 to permit rotation of thewheel 60 and cam The tension of the brake band 19 is such that when the solenoid 81 is deenergized to automaticam will still rotate at a very low speed until member to cause the sewing machine to come to a dead stop. The lug is so disposed that when the machine is thus caused to stop; as above described, the eye of the needle will be in proper alignment to be pierced by the hook 32. To minimize the shock of the meeting of the abutment member 89 with the lug 90, the said member 86 is provided with a longitudinal opening (see'Fig. 4) in the end thereof, into which there is slidably received a rod 96 having a rounded end portion 91, which is adapted to strike the lug 90 and which may be constructed of suitable resilient material. A spring 98 housed within the opening 95 is adapted to resilient resist the inward sliding movement of the rod 96 and thus absorb the shock when'the end 91 strikes the lug 90. A pair of nuts 99 threaded on a reduced portion I66 of rod 96 and disposed as shown is attached to the rod portion 96 and serves as a means for adjusting 'th'e'tension of the spring 98. I j

To limit the pivotal movement of the abutment member 80 toward the path of the revolution of the lug 90, we have provideda stop member 80a on the wall 13 (see Fig. 3) designed to cooperate withan adjustable set screw 80b on the link 19.

In Fig. 5 of the drawings, we have shown a wiring diagram illustrating the automatic action of the starting and stopping mechanism above described, and in which a switch S controlling current from a source of supply is shown in open position to break the circuit of current from said source of supply. -When the switch S is closed to complete the circuit from the source-of supply, the motor M for driving the wheel 60 and cam 64 is not yet energized due to the open hand switch H, which separates the contacts I01 and lilla due to the action of the spring I02, and thus renders the circuit to the motor M ineffective. The brake band 19 is, therefore, held in frictional engagement with the cam 64, due to the action of the spring 15, and because of the abutment member 80, which is shown diagrammatically as disposed in the path of the lug 90. Also, there is shown the traveling work platform I93, adapted to be driven through a chain of gears I04, I65, I06, the said gear I66 being mounted on the same collar 6| as the cam 64 and wheel 66.

When it is desired to operate the machine for stitching a tie, the hand switch H is moved to the dotted line positionH', which closes the contacts IM and "Na against the action of vthe spring I62, to complete the circuit through the solenoid 81 to energize the same, which then attracts its armature 18 and releases the brake band 10 against the action of the s rin 1 manner hereinbefore described. At the same tim.e,'the abutment member 80 is swung out of the path of the lug 90. The motor M, having been also simultaneously set in operation by the closing of the switchH, drives the wheel 60 and cam 64 through the belt 65 tooscillate the needle bars 22 and 23. The traveling work platform I03 1 is also simultaneously caused to travel by means of the gears I06, I05 and I 04, in the direction of the arrow, and the machine proceeds in its operation of stitching a tie.

After the work platform, carrying the assembled tie fabrics, has traveled a distance sufficient to complete the stitching of a tie, the pin I01 will switching means for rendering'said last named means ineflective, said switching means being directly in the path of the lug 90. The wheel 60 and cam 64 will rotate slowly due to the frictional action of the brake band 10 until the lug 90 strikes the member 80, to bring the machine to a dead'stop.

It will thus be seen that there is provided a device in which the several objects of this invention are achieved, and which is well adapted to meet the conditions of practical use.

As various possible embodiments might be made of the above invention, and as various changes might be made in the embodiments above set forth, it is to be understood that all matter herein set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

Having thus described our invention, we claim as new and desire to secure' by Letters Patent:

1. In a sewing machine, the combination of alternately operating upper and lower needle bars, a double pointed needle having an eye located between the points, means for alternately connecting the needle with each needle bar,

means for threading the needle, said last named means comprising a hook adapted to pass through the eye of the needle, a traveling work disposed in the path of travel of said platform and so positioned as to be actuatedby said plat- .format the end of its working travel, and means for causing said needle bars to come to rest at a predetermined position when said driving means is rendered ineffective, said predetermined positionbeing'such that the said needle will be con-" nected to the upper needle bar, and such that the eye of the needle and the hook of the threading means will be in registered alignment for threading.

3. In a sewing machine, the combination of alternately operating upper and lower needle bars, a double pointed needle having an eye located between the points, means for alternately connecting the needle with each needle bar, means for threading the needle, said last named means comprising a hook adapted to pass through the eye of the needle, a traveling work carrying platform, means to move said platform transversely of the longitudinal axis of said needle, means for driving said sewing machine to cause reciprocal movement of said needle bars, switching means for rendering said last named means ineffective, said switching means being disposed in the path of travel of said platform and so positioned as to be actuated by said platform at the end of its working travel, and means for causing said needle bars to come to rest at a cause reciprocal movementof said needle bars,

switching means for rendering said last named means ineffective, said switching means being disposed in the path of travelof said platform and so positioned as to be actuated by said platform at the end of its working travel, and means for causing said 'needle bars to come to rest at a predetermined position when said driving means is rendered ineffective, said predetermined position being such that the said needle will be connected to the upper needle bar.

2. In a sewing machine, the combination of alternately operating upper and lower needle bars, a double pointed needle having an eye located between the points, means for alternately connecting the needle with each needle bar,

predetermined position when said driving means. is rendered ineffective, said predetermined position being such that the said needle will be connected to the upper needle bar, said last named means comprising braking means, meansto actuate said' braking means when said driving means is rendered ineffective, and positive stopping means which is prepared for operation when said braking means is actuated.

4. 'In a sewing machine, .the combination of I alternately operating upper and lower needle bars, adouble pointed needle having an eye located between the Points, means for alternately connecting the needle with each needle bar, means for threading the needle, said last named means comprising a hook adapted to pass through the eye of the needle, a traveling work carrying platform, means to move said platform transversely of the longitudinal axis of said needle, means for driving said'sewing machine to cause reciprocal movement of said needle ,bars, switching means for rendering said last named means ineffective, said switching means being disposed in the path of travel of said platform and so positioned as to be actuated by said platform at the end of its working travel, and means for causing said needle bars to come to restat a predetermined position when said driving means is rendered ineffective, said predetermined position being such that the said needle will be connected to the upper needle bar, said last named means comprising a brake, a solenoid, said solenoid and said brake being so constructed and arranged that when said solenoid is energized said brake is rendered ineffective, means to means for threading theneedle, said last named means comprising a hook adapted to pass through the eye of the needle, a traveling work carrying platform, means to move said platform transversely of the longitudinal axis of said needle, means for driving said sewing machine to cause reciprocal movement of said needle bars,

de-energize said solenoid when said driving means is rendered ineffective, and positive stopping means which is prepared for operation when said solenoid is de-energized. a

5. In a. sewing machine, the combinati n 'of alternately operating upper and lower needle bars, a double pointed needle'having an eye located between the points, means for alternately connecting the needle with each needle. bar,

means for threading the needle, said last named means comprisinga hook adapted to pass through the'eye of the needle, a traveling'work carrying platform, means to move'said platform transg versely of thelongitudinal axis of j said needle, means for driving said sewing machin to cause; reciprocal movement of said needle bars, switch; ing means for renderingfsaid last named means ineffective, said switching means being disposed in the path of; travel of said platform andso positioned as to be actuated'by said platform at the end of its working travel, and means for causing said needle bars to come to rest at a predetermined position when said driving means is rendered inefiective, said predetermined position being such that the said needle will be connected to the upper needle bar, said last named means comprising a brake, a solenoid for controlling said brake, means to operate said solenoid so as to apply said brake when said driving means is rendered ineffective, and positive stopping -tions between said motor and said source of curr nt supply, switch in saidelectrical connections, said switch being disposed in the path of motor," a brake controlled by said solenoid, said means which is prepared for operation when said ing reciprocable movementof said needle bar, a

projectionon said wheel, a traveling work carrying platform, means for moving said platform, means for driving said wheel, switching means for rendering said last named means ineffective, said switching means being disposed in the path of travel of said platform and so'positioned as to be actuated by said platform at the end of its working travel, and means for causing said needle bar to come to rest at a constant predetermined position when said driving means has been rendered ineffective, said last named means comprising a stop and means to position said stop in thep ath of travel of. the extension on said wheel.

7. In a sewing machine of the character described, the combination of a needle bar, means comprising a rotatably mounted wheel for causing reciprocable movement of said needle bar, a

' projection on said wheel, a traveling work carrying platform, means for moving said platform,

means for driving said wheel, switching means for rendering said last named means ineffective, said switching means being disposed in the path of travel of said platform and so positioned as to be actuated by said platform at the end of its working travel, and means for causing said needle brake being'efiective 'to slow down said machine whensa'id switch isopenedby said platform, and means for causing said needle bar to come to restat a predetermined position when said switch is opened, said predetermined position being such that said needle will be connected to the upper needle bar, said last named means comprising positive stopping means which is preparedfor operation when said switch is opened.

9; In a sewing machine of the character described, the combination of alternately operating upper and lower needle bars, a doublejp inted needle having'an eye located between the points, means for alternately actuating the needle with each needle bar, means for threading the needle, said last named means comprising a hook adapt-- ed' to 'pass through the eye of the needle, a traveling work carrying platform, means to move said platform transversely of the longitudinal axis of said needle, means comprising a rotatably mounted wheel for causing reciprocable movement of said needle bars, said wheel having an extension, an electric motor for driving said wheel, a source of current supply for said electric motor, electrical connections between said motor and said source of current supply, a switch in bar to come to rest at a constant predetermined position when said driving means has been rendered ineffective, said last named means comprising braking means, means for actuating said braking means when said wheel driving means has been rendered ineffective, a stop, and means for positioning said stop in the path of travel of the extension on said wheel.

4,8, In a sewing machine of the character described, the combination of alternately operating ,upperv and lower needle bars, a double pointed ineedlehaving an eye, located between the points, msansdor alternately actuating the needle with (eaohneedle-bar, means for threading the needle, asaid; last. named means comprising a hook adapted ta-pass through the eye of the needle, a travel- ;ing work carrying platform, means to move said platform transversely of the longitudinal axis of said needle, and an electric motor for drivin said sewing machineto cause reciprocable movementof said needle'b'ars, a source sof current supply for said electric motor, electrical connecbe connected to the upper needle bar, said last named means comprising a stop and means to position said stop in the path of travel of the extension on said wheel.

10. In a sewing machine of the character described, the combination of alternately operating upper and lower needle bars, a double pointed needle having an eye located between the points, means for alternately actuating the needle with each needle bar, means for threading the needle, said last named means comprising a hook adapted to pass through the eye of the needle, a traveling work carrying platform, means to move said platform transversely of the longitudinal axis of said needle, means comprising a rotatably mounted wheel for causing reciprocable movement of said 'needle bars, said wheel having an extension, anelectric motor for driving said wheel, a source of currentsupply for said electric motor, electrical connections between said motor and said source of current suppl a switch in said electrical connections, said switch being disposed in the path of travel of saidplatform and so positioned as to be opened by said platform at the end of its working travel, a solenoid electrically connected to said motor, a brake controlled by said solenoid, said brake beingeifective to slow down said machine when saidswitch is opened by said platform, and means for causing said needle bar to come to rest at a predeterminedv position when said switch is opened, said predetermined position being such that said needle will be connected to the upper needle bar, said last named means comprising a stop and means actuated .by said solenoid to position said stop in the path of travel of the extension on said wheel.

11. In a sewing machine of the character described, the combination of alternately operating upper and lower needle bars, a double pointed needle having an eye located between the points, means for alternately actuating the needle with each needle bar, means for threading the needle, said last named means comprising a hook adapted to pass through the eye of the needle, a traveling work carrying platform, means to move said platform transversely of the longitudinal axis 0! said needle, and an electric motor for driving said sewing machine to cause. reciprocable movement of said needle bars, a source of current supply for said electric motor, electrical connections between said motor and said source of current supply, a switch in said electrical conv said needle bar to come to rest at a predetermined nections, said switch being disposed in the path of travel of said platform and so positioned as to be opened by said platform at the end of its position when said switch is opened, said predetermined position being such that said needle will be connected to the upper needle bar, said last named means comprising a stop actuable by said link for positioning in the path of travel of the extension on said wheel when the switch is opened RUDOLF' NAFTAH. VALENTINE NAFI'AH. HENRY" NAFIALI.

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