US2454379A - Embroidery machine - Google Patents

Description

Nov. 23, l1948.

B. G. FORTUNA l-:TAL 2,454,379 EMBROIDERY MACHINE 2 Sheets-Sheet 1 Filed April 4, 1945 INVENTORS .52W/70 Fortuna. d

Emil Helln er Gl-MEW ATTO RN ESS B. G. FORTUNA ETAL Nov. 23, 9 48'.

EMBROIDERY MACHINE 2 She'eiS-Sheet 2 Filed Apil 4, 1945 BY Emil HeZZL'Ker ATTORNEHS Patented Nov. 23, 1948 UNITED STATES PATENT OFFICE EMBROIDERY MACHINE Bruno G. Fortuna and Emil Helliker, North Bergen, N. J.

Application April 4, 1945, Serial No. 586,482

This invention concerns embroidery machines and refers more particularly to the platen rods which engage the shuttle guides of the so called Swiss embroidering machine.

In these machines,` as is well known in the art, the driver bar actuates the shuttle `guides by means of the platen rods, and therods are held on the bar by means of a screw and interposed leaf spring, it being necessary that the connection between the two should be resilient. Various constructions have been resortedto in attempts to produce a resilient connection between the driver bar and platen rod which would iix the rod firmly against movement longitudinal to itself, without substantial increase in the size or weight of either member.

In solving the above problem it was found desirable to provide a platen rod with two small recesses on its upper surface and located inwardly of the curve connecting the body of the rod to a substantially vertical upward `extending end portion. The leaf spring is then provided with fingers which extend down into these recesses, preventing outward longitudinal movement of the platen rod. A further feature of this rod is that, if the recesses are formed by stamping, a slight bulge extends laterally from the rod, effectively preventing inward longitudinal movement thereof by reason of contact with the sides of the slot in whiclithe bar rests. This eliminates the present expedient of forming a slight but sharp downward angular extension of the body of the bar adap-ted to engage the bottom surface of the slot in which the barrests in order to iix it against inward longitudinal movement.

In operation, the ,platen rod, extends inwardly from the driver bar to the shuttle guides, actuating the latter, in manner well known in the art. The fingers and recesses of the present invention prevent outward longitudinal movement of the,

platen rods, which is undesirable and results in a lapping of the coacting surfaces of rod and bar which promotes sliding instead of the desired frictional engagement.

The invention will appear more clearly from the following detailed description when taken in connection with the accompanying drawings showing, by way of example, preferred embodiments of the inventive idea.

In the drawings Figure l is a top elevation of the driver bar, platen rod and leaf spring clamp.

Figure 2 is a longitudinal vertical section of the same along the line 2 2 of Figure 1.

5 Claims. (Cl. 112-95) Figure 3 is a transverse vertical section of the same along the line 3--3 of Figure 1. n

Figure 4 is a perspective view of the improved platen rod.

Figure 5 is a side elevation, partly in section, of the invention in operative position on an embroidery machine.

Figure 6 is a perspective view of the improved leaf spring clamp. l

Figure 7 is a perspective View of the conventional driver bar in combination with whichthe invention is adapted to operate. e

Referring to Figure 5, the conventional Swiss embroidery machine lli is revealed as comprising a fabric frame Il slidably mounted between guides l2, I3. Needles i4 and punches l5 are detachably mounted on their respective holders I6, l1, the two latter being separately actuatable axially of the needles and punches for the purpose of punching and embroidering the work which is held inthe frame Il by the gripping bars I8. The presser ngers I9 are mounted on a finger bar 20 which is in turn mounted on the rockerbar 2|. The shuttle bar 22 carries a multif plicity of shuttle guides 23 containing the shuttles, not shown. The driver bar 24 is formed with slots 25, 25A in which the upper and lower platen rods 26, 21 fit. The lower platen rods 21 are de tachably and rmly held in slots 25A, as by a plate 28 and screw 29. The upper platen rods 26 are resilientlyI connected to driver bar 24 in slots Cil 25 by leaf spring clamp 3D and screw 3l engaging the threaded hole 3IA. The platen rods 26, 21 engage the shuttle guides 23 to actuate the same.

The platen rod 2B comprises an elongated body Yportion. 32 of substantially rectangular cross section adapted to fit in the slots 25 of driverbar 24. The tip 33 of rod 26 is parallel to body portion 32 andis Connected thereto byr a sharp downwardly and outwardly curved portion 34 whereby the rod 26 is locked against outward movement relative to driver bar 24. The opposite end 35 of platen rod 23 extends substantially vertically upward. So much of platen rod 26 is conventional. lThe invention consists in forming the body 32 thereof with two recesses 36 formed in the top surface thereof adjacent the upturned end portion 35, said recesses 36 preferably being formed by stamping so as simultaneously to form laterally extending bulges 3l on body 32 below recesses 36, the invention also including fingers 38 formed on spring clamp 30 and adapted to engage the recesses 36.

Spring clamp 30 is a substantially arcuate leaf spring comprising two substantially chordal under surfaces 39 adapted to bear upon driver bar 24 andplaten rods 26, and further comprising holes 40 spaced at intervals to permit the passage of screws 3| to the tapped holes 3 IA of the driver bar 24. An apron 4I extends downwardly from the body 30, having recesses 42 for the platen rods 26, the sides of the recesses 42 corresponding to the body 32 of rods 26 with recesses 36, and thus including the lingers 38 adapted to engage recesses 36.

The operation of the embroidery machine l0 is more positive due to the presence of the modiflcations constituting the invention. -Infiparticular, the tips 33 4of platen rods 2 6 engage the shuttle guides 23 and are not deflected outwardly by the engagement, since the fingers 38 engaging recesses 36 positively position-the rodsf26 axially. The bulges 3T engage the sides of slots 245V to prevent inward axial movement of rods 52'6. The requirement is thus met of a positive connection between :platen rods 2.6 and vdriver bar 2,4., 'the connection s'til'l `being -resilient fdue `to spring fclampfI 30, the requirement of resiliency Ibeing well understood in the art.

It yis apparent that the specinc 'illustrations -sh'ow-na'bove have been gi-ven by wa-y'gof illustrai tion only and not by way of limitation, andthat thestructuresabovewdescribed aresubject to wide variation and modification without departing ^from the scope of intent of 'the inventionfall of ,v

vwhich variations fand imodications are -to be included within the scope ATof :the ,present inven tion.

What'is claimed is:

A1. In an vernloroidering mac'hine comprising a ldriver bar vhaving slots `formed therein, rsaid rmachine Afurther comprising fa-,platen rod adapted to -t 'in said slots and -a substantially `arcuate spring -clam'p yadapted"fto'vbear on'said driver bar and-ffplatenrod to resilient/ly position :said rod in ysaid slots, `said Aplaten rod comprising 'an elongated body Yfportion of Substantially rectangular cross section and Aa-,sha'rply downwardly and outwardly curved tip-portion extending parallel to said .body

portion and adapted `4to vengage a :shuttle guide the end opposite the shuttle guide engaging end, the said bar having a pair of marginal pressed recesses at the juncture of the rod and upstanding portion, lateral bulges formed by the material pressed from the recesses for contacting the driver bar to prevent relative forward movement between the said rod and bar, a spring clamp adapted to resiliently bear upon said driver bar rand platen rod lto resilient-)ly vconnect the two together 'and position the said rod in said slots, and finger portions on said spring clamp for engagement with the forward ends of said recesses Ito :prevent relative rearward movement between the bar and rod.

'73. platen lrod for an embrodiery machine 'said-rod comprising a horizontal portion and a ver-tical rpor-tion ybent therefrom, a pair of marginal recesses in the horizontal portion at the juncture thereof with the verticall portion and bulging portions extending laterally from a point fbel'ow ,said recesses.

4. InPan-embroidering machine, in combination 'with adriver bar having slots yformed therein, a platen rod adapted to -t -in saidslots 'andeengage a shuttle guide lof .said machine, said ,platen rod comprising -a horizontal portion, a vertical end fportion extending therefrom and being formed with -a :recess therein at ythe juncture Aof the horizontal and -yertical portions :and -a spring clamp adapted to resiliently .bear uponfsaid-driver bar and Vplaten rod tof-resiliently connect-the two together and position -said rod `in :said slots, said spring clamp comprising-a f-nger portion adapted to engage'ithe forward yend of said .-recess.

5. -In an embroidery 'machine comprising a driver bar having slots formed rtherein, said machine further comprising a platenrod adapted to nt insaid slots and a substantially arcuate spring -clanrp yadapted .to bear .on said driver.v bar and `platen rod rto-resiliently position'said .-rod zin said slots, vthe saidfplaten rod having a ,horizontal portion andan upstand-ing end extending'therefrom, the improvement 1comprising recesses formedin .said platen srod =at the juncture of the horizontal portion and upstanding end, and fingers formed by -said spring clamp adapted -to engage the forward ends of said recesses for .the prevention of .axial movementof -said rod .relative ltoesaid bar. l

REFERENCES vCITED The `following references rare of .record in the file of this patenti:

Number

Images