US2169528A

US2169528A - Press-stitcher sewing machine

Info

Publication number: US2169528A
Application number: US230605A
Authority: US
Inventors: Heffron William
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-09-19
Filing date: 1938-09-19
Publication date: 1939-08-15
Anticipated expiration: 1956-08-15

Description

u'g. 15, 1939 g m/HEFFRON PRESSSTITCHER SEWING MACHINE Filed Sept. 19, 1938 INVENTOR Wil/dm Eef/rom BY .a

TTORNEY Patented Aug.' 15, 1939 UNITED STATES PATENT OFFICE j A2,169,528 Y raEssLs'rrrcnEa SEWING MACHINE William Hei'fron, Bronx, N. Y. Application September 19, 1938, Serial No. 230,605 9 claims. (01. 11e- 169) This invention relates to new and useful improvements in a press-stitcher sewing machine, and relates particularly to uniqueness of design and operation thereoi.-

The invention has for an object the construction of a machine which is characterized by a U-shaped casing adapted to be engaged in ones hand with the arms oi' the casing extended horlzontally with ones thumb or other finger at the top, and-a specific sewingfmachine mechanism mounted within the casing adapted tobe operated by manipulation of the thumb or other nger. The feature of the sewing machine resides in the fact that it may be held in one hand and operated by said hand to sewmateriais. v

The invention proposes to so arrange the parts of the sewing machine that material to be sewed may be engaged between thearms of the U-shapedv casing.

Furthermore, the invention proposes the provision of a thumb wheel rotatively mounted within the casing and having a portion of its periphery extendedI from the casing and adapted to be turned to tur'n a ily wheel for starting the machine in the right direction. v

Another object o f the -invention resides in the provision of a rod eccentrically connected with the fly wheel of themachine, and springs associated with the rod in acertain vmanner to' prevent the ily wheel from stopping at a'- dead position.

Furthermore, new and useful features of this l invention reside in the design and operation of the machine; meaning the general shape, com

pactability and portability, its method of operation by thumbor linger and handling withone hand; a novel folding down needle bar depressor, a new methodof elevating and keeping elevated the pressure foot; crank assisting springs that give permanent direction to the crank turning apparatus; a thumb wheel that permits of starting the mechanism or reversing the direction; a new methodof holding the` thread spool and giving tension 4varia'bly and a new type pulling device.

For further comprehension and arrangement of a thread oi' ,the invention,

and of the objects and advantages thereof, ref

erence will be had tothe following description and accompanying drawing, and to the appended claims. in which the various' novel features of the invention are more particularlyset forth.

In the accompanying drawing forming a material part of this disclosure:

Fig. 1 is a perspective view of a press-stitcher adjusted lto the thread thereon, Y

`body of the casing.

- terior mechanism.

sewing machine constructed according to this invention and shownv in ones hand ready i'or operation.

Fig. 2 is a perspective view of the sewing -ma-v chine per se viewed from a Vdifferent angle with the 5 cover open.l

Fig. 3 is an enlarged vertical sectional view the sewing machine shown in Fig. l.

Fig. 4 is a sectional view on the line 4-4 of Fig. 3. lo

Fig. 5 is a fragmentary sectional view on the Fig. 6 -ls a fragmentary perspective view of the top thread puller and adjacent parts.

Fig. 7 is a fragmentary detailed view of a poru tion of Fig. 3 showing particularly the top thread holding andtensioning means.

Fig. 8 is a fragmentary elevational view looking in the direction oi' the line 8 0 oi' .'i'ig` 4.

Fig. 9 is an enlarged detailed view oi' a portion 20 of Fig. 4.

The press-stitcher sewing machine includes a substantially U-shaped casing I0 adapted to be engaged in oz.' t; hand with the arms III'L and Ib thereof extended 'horizontally and with ones 25 thumb or other finger at the top. A needle bar means is mounted through the top arm I l' oi' the casing and includes if. vertically. extended needle bar ii for supporting a needle I2. 'I'his needle bar I I has a concave head Il against which 30 ones thumb or other finger may be rested, as s hown in Fig. 1, to depress the same. This concave head I3 is pivotally supported by a pintle Il on the upper end oi' the needle bar I I. Stop elements I5 and I 8 are l'or'med respectively on 35 the concave head I3 and the needle bar II for limiting pivoting oi.' these parts to a vertical position from a horizontally extended position. 'Ihe arrangement is such that when the sewing machine is not used the concave head I3 may be 40 folded down to decrease the compass o1' the machine and it may repose in a cavity inc formed in the top'of the casing III, for this purpose.

The casing I0 isof hollow construction and is adapted to house the mechanism of the sewing machina' as hereinafter more fully described.

The casing is provided with a frontcover Illd which is supported by several hinges I1 to the This l:front cover may be opened as illustrated Several clips Il' are xed on the cover and are engagea'ble with the heads of screws |01 on the'casing Ilfor holding the cover, resiliently closed. v A pressure ioot'means is mounted in the top 55- in Fig. 2 to expose the 1n- 50 a pintle I! pivotally arm It'l of the casing and includes a pressure foot il having a foot portion Il'b engageable against the top face of the bottom arm Il of the casing. The shank portion Ill of the pressure fooil extends upwards through the top arm It' oi.' the casing. At an intermediate point a Z-shaped stud l! projects from pressure foot and acts against the top wall of the casing and the stud llfor resiliently urging the pressure foot downwards. The stud il passes through a slot 2| formed in the casing Il. A

head 22 nxedly engages upon the stud Il. The

slot 2l has an offset top end, see Fig. 8, adapted to receive the stud I0 for holding the pressure foot in a raised position when required. To raise the pressure foot the head is forced upwards to compress the spring 2l and lift the pressure foot, and the head 22 is moved laterally to engage the stud in the oil'set portion of the slot and so hold' the pressure 'foot in a raised position.

A cloth feeder means is mounted in the'bettom karm of the casing .and is extendible through the top face thereof-to be cooperative with the pressure foot. This'cloth feeder means includes a toothed cloth feeder bar 2l arranged immediately belowv the inner face of the top wall of the arm ltboi' the casing and engageable through openings 24 in'this top wall. The toothed member 2l is mountedon a ilat body 2l which is slidably supported in a particular mannerby a screw 2l* mountedpn a block 4l and engaging a vertical slot II formed in the body 2l, to permitthe body 2l to pivot as well as slide vertically. .Acam 2l isv fixed on a shaft Il rotative through the block 4I." -This cam 2t engages an opening 21 in the e Si turns, the cam 20 Vworking'in the opening 21 will pivot the frame t the screw 2l* and simultaneously raise and lower body to move the toothed member 23 through amotion for feeding the should b e noted thatthe camz will then merely idle through a portion of the Owning 21. In

-this manner the length ofthe stitch of the sewying machine may be controlled.

'The needle .bar Il is slidably mounted throughthe casing, and intermediate the compass of the top arm, connects a lever I4 with a portion of the needle bar. This lever 34 is piv-v otally mounted intermediateof its ends by a pintie lvl upon a bracket 3l which is stationarily mountedwithinthecasing. Therearendofthe lever ai informed with a heu lernt as connecting the top arlli il* of of its ends,l within it with a red a1 aceentriceny pivoteny connected by a ball joint 3l uponafly wheel Il. This fly wheel is fixed on the shaft 3l. The shaft Il is rotatively supported .in a block 4t `iixedly the easing. The amusement is such that when the fly wheel Il is started rotating it is .an easy matter to press down with the 7s thumb or other finger on the head i3 of the needle the side Vof the pressure foot. lA spring 2l is coaxially mounted upon the ranged ,on opposite Y flat body 2l. This opening 2'Iv is of a width wider than'the cam. The arrangeengalresthroughnv yof-t'hread I2. The spindlelis free to turn on the spindle. 'has a reduced end Il Vwhich Lag'ainst lthe 91| brs against vone face ofthe spool l2. vThe bar and add a turning' torque to the fiy wheel. When the eccentric rod 31 reaches the top o! its, stroke, pressure is released from the thumb head Itlso that the 'momentum of the turning parts and a spring 531 lifts the needle bar il to its top position. The spring 31* is coaxial on the bar Il and acts between a. pin'lb on theV rod and a portion of the casing Il. Additional energy `may now be applied-to the turning mechanism by pressing down with thethumb or finger on the head i3.

An'arrangement is provided for preventing the eccentric rod Il from stopping ata dead" point. This means ,includes a pair of springs 4i, 42 arsides of the .vertical central Each of these springs is fixits ends upon the wall of line of the rod 31. edlvy mounted at one of the casing le.. l rod 31 when the rod is in its top position.- The spring 42 acts against the rod Il when it is in its bottom position. 'Ihese springs tend to push the rod N past the dead center at the top and at the bottom of the stroke. j

A thumb wheel mechanism is provided -for starting the ily wheel 3l rotating in the proper' direction. cludes a thumb wheel 4I rotatively mounted The spring 4I acts against the thumb wheel mechanism in` upon a shaft 44 supported'by the block 40. -,A`

gear teeth which Vmesh with' a pinion 4l fixed upon the shaft 3l. The 44 is pivotally mounted in the block 4l.

vA pintle 44* serves to pivotalysupport` the inner endv of the shaft 44v within a cavity 4l* formed in the block 4I. A spring 40 has a por tion coaxially arranged on'thetpintle 44.* and has one of its ends ensuing tbl@ shaft 44'and its other end engaging a lug .41 mounted upon the easing il. The spring acts to normally p'fvot the shaft 44 against the lug 41 so that the gear teeth upon .the thumb wheel 4l are out of mesh with the teeth of the pinion 4l. -When one places his thumbagainst the projecting end of the thumb the spring -40 thumb wheel 48 with the pinion 4l. -Rotations ofthe thumb wheel will then be transmitted to the pinion 4l for starting'. the machine in a direction desired. and when the machine is normally running, the thumb wheel 48 will be in an idle cause of the" cavity il' inthe casing Il. lat no time will the thumbjwheel 48 project outside of the sidewall o f the casing.

A spindle Il is mounted thecasing Il andris adapted to support a spool il is oi'cvai shape in transverse cross section as indicated inlllg. '1.

-A ilat spring 'Il ,is riveted upon the inner end of the spindle Il and will beheld non-rotative because of the shape of the spindle.. The spool l2 'Ihe spindle It projects through the wall of the casing I4. An adiustment nut I3 wheel 4I., he will oppose the` action of and engage the gear teeth of the `portion or the periphery' of the thumb wheel n When the machine is not in use.

is thr'eadedlyl mounted on the end ll'L and bears wall of the casing Il. The spring such .thatthe nut 53 may be arrangement is the pressure of thespring 1I turned to. control y against the side of the spool i2. In this manner vthe te on of the l2 may becontrolled.. 7g

forming a loop within the bottom arm of the casing. A looper wheel 51 is mounted upo the shaft 3| and is formed with a hook portion adapted to catch the loop of the thread. l

'Ihis looper wheel 51 is adapted to `form a chain stitch. yWhile this particular type of machine has been disclosed it should be borne in mind that by a substitution of a conventional bobbin and associated looper wheel it is possible to convert the stitching machine to one making a lock stitch. Since such variation willreadily be known to those skilled in the art lfurther ampliiication 'on this point will not be given in this specification.

A means is provided for pulling the top thread tight after the loop has been operated on by the looper 51. This means includes a lever 6| formed with an eye portion 6 |a at one end through which the thread 52 engages. The middle of the lever 5I is pivotally supported by a pintle 62 mounted in the bracket 36."

The rear end of theA lever 5| engages the underside of the lever 3l. The parts are so proportioned that the lever 6| will act to pull the thread 52 tight at the correct instant. The thread 52' extends from the spool 52 through a stationary guide element 52b mounted upon the inner wall of the casing, then continues out through an opening 52EL formed in the wall of the casing, then continues through the eye portion 6|, and finally through the eye of. the needle I2. The front end of the lever 6| passes through an` opening SIb formed In the bottom wallof the arm I0El of the casing I0.

A means is also provided forctensloning the spool 52. This means includes a tension springA 1| engaging against a face of the spool 52. This spring 'II is mounted on the spindle 5|. as previously explained, The spool 52 may be tensioned by the proper operation of the nut 53. l

The operation of the device is as follows:

The press-stitcher sewing machine is held in ones hand as illustrated in Fig. 1. Cloth material to be sewn is placed in between the arms |||a and Ib of the casing beneath the pressure foot I8.l

The pressure foot I8 may be momentarily raised to permit the proper engagement of the 'cloth material in position. 'I'he thumb wheel 43 is then turned in the proper direction to start the sewing machine. T'he power is then applied by pressing down with the thumb or finger on the needle bar |I and reciprocating this bar as previously described. This reciprocative motion operates the sewing machine by driving the shaft 3|. Rotation of the shaft 3| operates the looper wheel 51 and the feeder mechanism, and the thread puller lever 6|. The sewing machine is now operating.

While I have illustrated and described the preferred embodiment of my invention, it is to be understood that I do not limit myself to the precise construction herein disclosed and. the right is reserved to all changes and modifications coming within the scope of the invention asdelined in the appended claims.

Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent is: A

1. A press-stitcher sewing machine, comprising a substantially U-shaped casing adapted to be engaged in ones hand with the arms thereof extended horizontally and ones thumb or other linger at the top, cloth feeder means mounted in the bottom arm of said casing and extendable through the top face thereof,'pressure foot means mountedon the top arm of said casing and acting against said cloth feeder means, a needle bar means mounted through the top arm of-said cas- A ing and supporting a needle engageable through apertures in the` pressure` foot and feeder and having an upwardly extending portion, a member mounted upon the end of said upwardly extending portion and upon which ones thumb may be engaged for urging said needle bar downwards to engage said needle through the apertures in said pressure foot and feeder, a resilient means for returning said needle barto its normal position when the pressure on said member is released,

a block mounted in the bottom arm, a shaft rotative through said block, a looper wheel mounted on said shaft in a position to be cooperative with said needle, a flywheel mounted on the rear end of said shaft, an eccentric rod connected with said ilywheeLa pivotally mounted lever connected with said rod and with said needlel bar, thread holding and guiding means, and a thread puller synchronized with saidneedle bar.

2. A 'press-stitcher sewing machine, comprising a substantially U-shaped casing adapted to be engaged in ones hand with the arms thereof extended horizontally and ones thumb or other linger at the top, an adjustable cloth feeder means mounted in the bottom arm of said casing and extendable through the top face thereof, pressure foot means mounted on the top arm of said casing and acting against said cloth feeder means, a needle bar means mounted through the top arm of said casing and supporting a needle engageable through apertures in the pressure foot and feeder and having an upwardly extending portion, a member mounted upon the end of said upwardly extending portion and upon which ones thumb may be engaged for urging said needle bar downwards to engage said needle through the apertures in said pressure foot and feeder, a resilient means for returning said needle bar to its'normal 'position when the pressure on said member is released,` a block mounted in the bottom arm, a shaftrotative through said block, a looper wheel mounted on said shaft in a position to be cooperative with said needle, a flywheelv a substantiallygU-shaped casing adapted to be engaged in ones hand with the arms thereof extended horizontally andi ones thumb orv other fingerI at the top, cloth feeder means mounted in the bottom arm of said casing and extendable through the topface thereof, pressure foot means mounted on the top arm of said casing and acting against said cloth feeder means, a needle bar means mounted through the top arm of said casing and supporting aneedle engageable through apertures in the pressure foot and feeder and having an upwardly extending portion, a mem- Y ber mounted upon the end of said upwardly extending portion and upon which ones thumb may Y be engaged for urging said needle bar downwards to engage saidneedle through the apertures 'in said pressure foot and feeder, a resilient means 5 for returning said needle bar to its normal position when the pressure on said member is released.. a block mounted in the bottom arm, a shaft rotative through said block, a looper wheel mounted on said shaft in a position to be cooper-rv 10 ative with said needle, a flywheel mounted on the 15 puller synchronized rear end of said shaft, an eccentric rod connected v with said flywheel.. a pivotally mounted lever foot means'and engaging through a slot in said casing, a nut nxed on said stem and adapted to 20,' hold the pressure footin a raised position.

4. A press-stitcher sewing machine, comprising asubstantially U-shaped casing adaptedtol be engaged in ones hand with the arms thereof extended horizontally` and ones thumb or other 2s finger atthe top, cloth feeder means mounted in 8l extending portion 70 to engage said needle e said pressure foot and feeder. a resilient means 7g shaft rotative through said blocs. a looper wheel socomprisins Il ing a substantially U-shaped d5 apertures in the bottom arm of said casing and extendable through the top face thereof pressure foot means mounted on the top arm of said casing and acting againstesaid' cloth` feeder means, a needle 'hat'l $0 means mounted through the top arm of said casing and supporting a' needle engageable through-apertures in the pressure foot and feeder and having an upwardly extending portion, a

member mounted upon the end of said upwardly may be engaged for urging said needle bar downwards to engage said Vneedle through the apertures in said pressure foot and feeder. a resilient.

means-for returning said needle bar'to its nor- 40 mal position whenthe pressure on said member is released,a block mounted in the bottomarm;

a shaft rotative through said block. a looper wheel mounted on said shaft in a position to be cooperative with said needle. a flywheel mounted on the rear end of said shaft, an eccentric rod connected with said flywheel.I a pivotally mounted lever connected with said rod and with said needle bar. thread holding and guiding means, and a thread puller synchronized with saidneedle bar.

` a thread puller lever pivotally mounted and having a loop through which the needle thread passes and synchronizes with Asaid needle bar.

5. A press-stitcher sewing machine, compriscasing adapted to be engaged in ones hand with the Y extended "horizontally and ones thuxnbor other finger at the top, cloth feeder means mounted in thebottom arm of said casing and extendable s0 through the top face thereof. pressure foot means mounted on the top arm of said casing and acting against said cloth feeder means,A a needle bar means mounted through'the top arm of said casing andsupporting a needle engageable through the pressure foot and feeder and having an upwardly extending portion', a member mounted upon the end. of said upwardly extending portion and upon which ones thumb may be engaged for urging said ne'edle bar downwards through the apertures in for returning said needle bar to its' normal position when'fthe pressure on-said member is released. a block mounted in the bottom arm. a

said

and upon which ones thumb arms thereof i and connected' with tive with said needle, a 'ilywheel mounted on the rear end of said shaft, an eccentric rod connected with said ywheel. a pivotally mounted lever connectedwith said rod and with said needle bar. threadholding and guiding means, and a thread puller synchronized with said needle bar, comprising a thread puller lever pivotally mounted and having a loop passes and one end of said thread puller lever being in contact with said rst named lever to be moved thereby.

6. A press-stitches' sewing machine, comprising a substantially. U-shaped casing adapted to be engaged in ones hand with the arms thereof extended horizontally and ones thumb or other finger at the top, cloth feeder means mounted in the bottom. arm of said casing and extendable through the top face thereof, pressure foot means ,mounted on the top arm of said casing and act'- having an upwardly extending portin, a member ,mounted upon the end of-said upwardly extending portion and upon which ones thumb may be engaged for urging said needle bar downwards to through which the thread engage said needle through the apertures in saidl pressure foot and feeder, a resilient means for returning said needle bar to its normal position when the pressure on said member is released. a block mounted in the bottom arm, ashaft ro'- tative through said block; a looper wheel`mounted on said shaft in a position to be cooperative with said needle, a flywheel mounted on. the rear end of said shaft, an eccentric rod connected with said lflywheel. a pivotally mounted lever connected with said rod and with said needle bar,v thread holding and guiding means, a puller synchronized with said shaft, and a thumb wheel rotatively and pivotally supported. geared with said ilywheel and movable to a position out of connection therewith.

1. A'press-stitcherv sewing machine,l comprising a substantially VU-shaped casing adapted to be engaged in ones hand with the arms thereof extended horizontally and ones thumb or other finger at the top, cloth feeder means mounted in the bottom arm of s aid casing and extendable through the top face thereof, pressure foot means mounted on the top arm of said casing and acting against said barmeans mounted' through thetop arm of said casing and supporting a needle engageable through apertures in the pressure foot and feeder and having an upwardlyextending portion. a

Y member' mounted upon the end of said upwardly vextending portion and upon which ones thumb may be engaged for urging said needle bar downwards to engage said needle through the apertures in said pressure foot and feeder, a resilient means for returning said needle bar to its normal position when the pressure on said member is re- 'leased, a block mounted in the bottom arm. a

"needle bar, threadholding and guiding means.- a

said shaft, and

thread puller synchronized with a thumb wheel rotatively and pivotally supported said flywheel and movable said shaft in a position to be cosaid needle. a flywheel mounted cloth feeder means, a needle aisance i t 5 to a position outl oi' therewith,the' ion mounted coaxial with said flywheel and periphery of said thumbwheei being formed with meshing with saidlg'ear teeth, and said thumb the mesh ot the gear teeth with said pinion. and resilient means for urging said shaft to dis- 8. A press-stitcher sewing machine, comprising connect said gears.

a substantially U-shaped casing adapted to be 9. Apress-stitcher sewing machine, comprising engaged in ones hand with the arms thereof a substantially U-shaped casing adapted to be extended horizontally and ones thumb. or other engaged in ones hand with the arms thereof ex- 'm 'Y nger at the top, cloth feeder means mounted tended horizontally and ones thumb or other in the bottom arm of said casing and extendlinger at the to cloth i'eedermeans mounted in able through the top face thereof, pressure foot the bottom ann oi said casing and extendablev means mounted on the top arm of said casingl through the top face thereof, pressure foot means and acting against said cloth feeder means, a Y

needle bar means mounted through the top arm ing against said cloth .feeder means, a needle bar of said casing and supporting a needle engagemeans mounted through the top arm of said castion, a member mounted upon the end of said vhaving an upwardly extending portion, a mem- 20- 'siiient means for returning said needle bar to tures in saidpressure foot and feeder, a resilient 25 tion to be cooperative with said needle, a ily# mounted on said shaft in a position to be co- 3 0 wheel being formed with gen teem, e pm-` i o i N. '40