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Патент USA US2410399

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Oçt.> 29, 1946.
A. R. woon
WORK-CLAMP FOR SEWING MACHINES
` Filed May 25, 1945
L_____....
2,410,399
2 Sheets-Sheet l
Oct. 29, 1946.
A. R. wooD
WORK-CLAMP FOB SEWING MACHINES
Filed May 225,v 1945
a
jmmm:
2,410,399
2 Sheets-Sheet 2
Patented Oct. 279, 1946
2,410,399
UNITED -STATES PATENT OFFICE
.
_
2,410,399
WORK CLAMP Fon SEWING MACHINES
Alfred` R. Wood, Bridgeport, Conn., assigner to
The Singer Manufacturing Company, Elizabeth,
N. J., a corporation of New Jersey
Application May 23, 1945, Serial No. 595,269`
»
17 Claims.
1
(Cl. 112-114)
2
This' invention relates to sewing machines,
more particularly of the type having stitch-form
ing mechanism and a work-clamp with means
5-5 of Fig. 1.
ì
The invention, as illustrated in the accompany
ing drawings, is embodied in a sewing machine
of the straight buttonhole type which is disclosed
in U. S. Patent No., 885,310, April 21, 1908, E. B.
for relatively moving them to sew a predeter
mined group of stitches; the stitch-forming
mechanism coming to rest automatically after
the predetermined group of stitches has been
sewn in the work.
.
ent work-clamp taken substantially along line
Allen.
Machines of this type are
l
.
.
Y,
As partly shown in Figs. 1 and 2, the present
commonly used for tacking and barring, button
machine comprises a bed I in which is journaled '
holing and other operations.
a rock-shaft 2 driven by mechanism not herein
shown. Upon one end of this shaft is mounted
the usual shuttle-driver 3 which actuates the
shuttle il carried in the race 5 which is in turn
.
Machines of the type in question have been
heretofore provided with a work-clamp adapted
to Acooperate with the sewing machine stitching
and feeding mechanism for the purpose of attach
mounted upon _the bed I. The machine has the
ing labels to articles. When attaching labels to
usual endwise reciprocatcry and laterally vibra.->
blankets and similar soft or spongy articles, the
Work-clamp sinks into the soft or spongy mate
rial to a depth suñicient to cause the margin of
the label to curl or incline upwardly. When the
tory eye-pointed needle 6 carried and actuated
by mechanism not illustrated. The shuttle '4_
cooperates with the needle 6 in forming lock
free label-edge is thus inclined, it lieg` along a 20
The Work-clamp, except as hereinafter specifi-A,
cally described, is constructed substantially in
stitches in a manner well-known.
vertical wall of the clamp and is out of the needle
path, with the result that the needle frequently
fails to stitch the edge of the label to the article.
It is, therefore, an object of the present inven
tion to provide an improved work-clamp which 25
~
'
accordance with the disclosure in U. S.,Patent
No. 1,489,295, April 8, 1924; A. R. Wood.l The
is adapted to press a label or like article, against
bed I of the machine has cut therein guideways
l, 'I for the cross-slide-plate 8. which, in the pres
ent machine, is fixed againstfmovement inthe
a soft or spongy sheet of material in a manner
guideways 1, 'I by shoulder-screws 9. The-present
such that the area of the article which is to re
cross-slide-plate 8 has no’connectionwiththe
ceive the stitches lies ñatwise against the sheet.
usual feed-wheel IIJ, as it has no movement in
With the above and other objects in view, as 30 the bed I during the cycle of operations.
Will hereinafter appear, the invention comprises
Mounted, as__usual,` on the cross-slide-plate8,v
the devices, combinations, and arrangements of
is the stationary throat-plate or work-supporting
parts hereinafter set forth and illustrated in the
accompanying drawings of a preferred embodi
ment of the invention, from which the several
plate II with the needle aperture I2.
;
Mounted in guideways I3, I3, in the cross
_ slide-plate 8 is the longitudinal slide-frame or
features of the invention and the advantages at
tained thereby will be readily understood by those
base-plate I 4 of the work-clamp.' The 'base
plate I4 has imparted to it, during a sewing
skilled in the art.
period, step-by-step travelling movements length
y
`
`
In the accompanying drawings
wise of the bed I, by the usual link I5 and lever- f
Fig. 1 is a top plan view of a portion'of a sew
40 connection I6 with the usual feed-cam groove IÍI
ing machine provided with the present improve
in the feed-Wheel IIl., The base-plate I4 carries
ment.
.
`
Fig. 2 is a righty side longitudinal elevation,
partly ini'vertical section of portions of the sew 45
ing machine and work-clamp; the section being
taken substantially along line 2-2 of Fig. 1.
Fig. 3 is a bottom View, partly in section, of a
a lateral extension IS on which is pivoted, in the
usual. manner, the upper- clamp-arm I9 upon
which' presses the usual ,clamp-closing spring-_
biasing unit 20. The clamp-arm I9 includes two
spaced forward extensions 2l, 22, to the ends of
Whichis secured by screws 23, 24, the clamp-foot
frame 25 -having the rectangular stitch-receiving _
aperture, defined by the walls 26, and the ser- -,
Fig. 4 represents a vertical section of the usual 50 rated fabric-clamping ribsZ'I at the sides of the
portion of the work-clamp.
form of work-clamp which does`.not embody the
present invention. This view would normally be
taken substantially along line 5--5 of Fig. 1, if .
the Work-clamp shown therein was of this type.
Fig. 5 represents a vertical section of the pres 55
aperture. l The serrated ribs 2l act as Work-grip-l
ping surfaces so as to clamp the work against the t
smooth top surface portion 28 of the Work-sup
porting throat-plate II. The top portion28 of
the throat-plate II is smooth throughout its
afilados
3
during a sewing period.
Secured to the upper clamp-arm i8 «by screws
29 is a tail-piece 30 which is adapted to be actu
ated to raise the clamp in the usual manner, as
disclosed-jin'l U; âlgjgPatentr No. A-1,966‘,¢f:32¿ Julyl 17,
1934, E. B_‘Ailen et al.
'
4
understood .that due to the spongy character of
the material 46, the clamp 25 will sink into the
same to the extent that the marginal portion 4l
of the label 4l will project upwardly and' possibly
out of the vertical path of the needle 6. Clearly,
the present invention, as best shown in Fig. 5,
entire length and the Work slides along this plate
while _under the pressure of the clamp-foot 25
'
The clamp-foot frame 25 is iitted with the usual
pivoted needle-thread cutter and nipper blades. 1.0,.
3l and 32 which are operated by mechanismcon:v
structed substantially in accordance with the dis
closure of U. S. Patent No. 1,8395823; January 5,-V
1932, A. R. Wood. The thread-'cutter operating l.
overcomes the shortcomingsL inherent-in the prior
type of work-clamp,
Having thus set forth the nature of the inven
lition, what I claim herein is:
l. In a sewing machine, in combination, stitch
forming mechanism including a reciprocatory
needle, a work-clamp provided with a needle
clearance ‘Opening',„ means for relatively moving
mechanism is not described herein as it forms no: ~ „said needleand work-clamp lengthwise of the
work-clamp. opening, a Work-presser disposed
part or the present invention.,
within said opening of the Work-clamp and pro
According to the present invention, the vertical `
vided with a needle-clearance slot, and supporting
Walls 26, which define the elongated openingin.
means providing for relative movement of said
the clamp, are provided with longitudinal grooves
work-clamp and4 work-presser lengthwise of- said
$3, _33 fin-A which; ist- slidably _.«disposedthehead 3d!
needle-_clearanceopening. of ¿the work-clamp.
formed at the fron-t end of an elongated ilat label
presser-blade
2. In a sewing machine, Vin combination»,.stitch-
f The blade; head 3%" is provided
forming mechanism including a reciprocatory
needle, awork-clamp~ provided with a needle-
Wîilïh’a needle-clearance'slot-«35; the blade 34 hav
ingsasupportingjshanl;j E 6 'and sight `or label alin -
clearance opening, means .for relatively moving.
ing l'l'ole’s,f3l‘.„`- The shank. :e36/_of the blade is 4pivot-_
said needle . and; work-clamp lengthwise , or . the.
ally secured by a screw 38 to an’ ear 39 of a sta
work-clamp opening.. a Qwork-presser comprising
a .blade disposed -lengthwise within Vthe .work
tionaryr¿bracket-î-member `ñxed to the-bed I.l The
label V»presser-hlada Ithrough ¿the -medium ¿or _its l'
clamp openingv and provided»..at.one- end with» ai
pivotal connection, >may ¿befgraised _ and lowered
withîthe clamp zand, Efurthermore;l this,` connection » 30 widened head, said head extending entirely across
said .work-clampopening .in `,the region of the-path »
willÁ prevent, >anyaendwise,movement of the pres
ser-blade.;Begreiative;tothe ¿needle 5 during the
workeshiiting:movementof,the work-clamp. The
presser-bladeßêl is. provided: in its` bottom portion
withlaflongitndinall groove ¿Safor >thetpurpose of
providingrelie'í directlyabove .that portion of the
of reciprocation of rsaid,ne_edle,.-and.supporting
means providing . for A relative- movement: rof :said
work-clamp and work-.presser llengthwiseof fthe.
work-clamp opening. '
35
.
3. VIn a sewing ,machina-.incombination, stitch- ,
forming. mechanism including... a ,reciprocatoly
work! which .. is adaptedieto _ receive` the stitches.
needle,` a work-,clamp ,provided with va -needle-.
clearance opening,>` means. for relatively .moving
` worin-clampA relatively. .tothe `.staticnary blade> 315; 40 said` .need-le.: andv work-.clamp>` lengthwise .of :the
work-clamp. opening: a.-Y work-presser comprising.
Secured? to fthe base-:plate ld; by .means „ofthe
This relief is eEective-fto»..reduce-_to >a minimum
the-@oppositionv to `theieeding. of 'the 4work „by the
screws .4.1: aandJlZ is afwork-.supporting r~apron _d3 s
` which;lisë:shiíted¿back> and forth relative t0, the
needle . 6 »in .response to :the- ¿action4 of :theieed
wheel.` El 0-a. In .orderatmprevent thaworlçl »from
droppíngdown .andbeingocaneht between >the ¿f or
' w-arìd .portion oi therapron and the workfy-support
a-.blade disposed.lengthwiseY withinatheI Work
clamp opening. and, providedA with a .widenedhead
intheregionof the path ofreciprocation of said
É needle, said headbeing slidablyîsupported by. said
work-clampat opposite .sides of saidwork-clamp
opening,-and means -for impar-ting .relative .move-..
ment, ,. to -- said; ,l work-.clamp
ing plate Jl [,-fthere .íssecuredto the runder sideoî
and f work-presserv
the apron„ëäfaitongueeâßl- of Which‘the free endl
lengthwise .ofthework-clamp. opening, >upon rela
portionjs slidablysupportedbnthe throat-plate
50 tive» .movement . of..,said needle and. work-clamp .
H.
“
.
Y.
~
intthesame direction. .
v
4.. In a. sewingl machine, in combination, stitch
ing forming mechanism includinga reciprocatory
With particularmeference-tdFig, 5,4 itv may be
seenthatwithithe present; construction; when the
needle,.a l.work-clampv provided. with a needle-V
clamp .-25 iis .»lc_wvered...to,hold~ the,y label 45 ion. thevv
clearance opening, means. for.y relatively moving
spongy material-¿líâßatheobladeâd ’and itsheadëß’f f
saidfneedle and vworkeclamp vlengthwise, of . the
engagethe .free-marginal portioniéilxohthe label
‘l5-'land Íhold-it> down .againstthematerial d5.- As
the- clainpfl-î‘î»VL feeds .thematerial '.48 fand, label 425 f
work-clamp opening, a work-pressen.comprising
a blade disposed .lengthwisef‘vithin vthe work
Vrelative#to the -needleßglin the usual'mannenthe
pressereblade fSllLremaiIis- stationary >anditheiedge
head havingwa needle-clearance slot, saidblade
clamp ,openingend providedgat.. one end With-»a
having a plurality of vsight apertures and _said
Ofêthe- label-slides unden the presser-.blade Stand
is 1 presented. .ín-...ag :substantially ñat.„position,; as '
shown-.in Fig. 5,ltothelstitcheforming mechanism;
In thesewing machine-chosen to' illustrateA the
present improvement;theipresser-blade ,3 ß. main
tainsthamarginal vportieri of .the .label d5 ¿in `a
flattened position! such-¿that fthe .vibratory` Yneedle .,
successivelystepsv overl-theedge of :the label and '
65
headbeing slidably supported bynsaid worlçfcla'm‘p
at opposite sides _of said work-clamp opening,~and
means~ for-«imparting relative lmovementto«said¿
work-clamp ¿and-«work-presser Alengthwise -orsaid
Work-clamp opening-in timed »rela-tion» with the
relative `movementofsaidAv needle and work-clamp
` in the same direction.
.
.
»
5.1In.a sewing machina-.in combination, stitch
edge`> of-the'labeli. Thisiisadesirable becauseaíin- _ 70 forming.` mechanism- including. a.y reciprocatory
thereby jerfectively ‘overstit'che's ~» and Yconceals Ithe
ishedprodu'ct.orhighv quality can be produced byI _
usi-n'gïja -iess `expensive Vout edge Ílabel, Vinstead of
the moref'expensive selvage edge label.:
needle, Va ., travellinggz-workîeclampprovided l :with¿
a `¿needle-clearance eopening‘; means..:for„ifshiiting
said; work-clamp.v lengthwise. of ¿the-_ work;-_clamp>
opening,l va work-‘presseríhavingra .needle-_slot .and
>Fig-_ - 4 ’ .illustrates„th'ezlusual type. of ¿clamp withal. .
out the present improvement. It may be readily 75 slidably supported by said work-clamp at op
2,410,399.y
5
E
posite. sides of said work-clamp opening, and:
means anchoringl said workj-presseïr againstv
ingïsaid auxiliary presser member-with said bed,¿ï
movement with said work-'clamp'.
under relatively to said work-supporting plate
and said auxiliary presser means in the .direction
„
f
and means to feed said foot and the work there#
.
~- 6.- .Ina sewing machine, in combination, stitch
forming mechanism "including a reciprocatory
needle,- av work-clamp 'provided with a needle
clearance opening, means for relatively moving
said needle and work-’clamp lengthwise of the...
of the stitch-receiving aperture elongation. .
l1. A work-clamp for sewing machines having .
a stationary bed with aV work-supporting plate
carried thereby, said clamp comprising, a foot por
tion opposed to said work-supporting plate and
work-clamp opening, a Work-presser 'disposed 1
within said opening and having a needle-clear 10 having an elongated stitch-receiving aperture,
ance slot, said work-presser’ being provided at
work-clamping portions at the under face lof saidy
the work-side thereof with a work-clearance
foot at the sides of said aperture, an auxiliary
groove extending lengthwise lof the work-clamp
clamp member having a needle aperture in one
opening, and supporting means providing for
end portion thereof which is slidably mountedl
relative' movement of work-clamp and work
presser lengthwise of said'work-clamp opening.
7'7. In a sewing machine having- a bed carrying
15
lengthwise within said stitch-receiving aperture,
means connecting that end of said auxiliary
a work-supporting plate formed with a needle
clamp remote from the needle aperture withfsai'd ’
bed, and means tofeed 'said foot and the work
aperture, a clamp-foot opposed to -saidA work
thereunder relatively to said work-supporting
su-pporting plate, said foot having a rectangular
stitch-receiving ,aperture and means at the sides
of said aperture adapted for cooperation with said
plate to grip the work, a lever supporting said
plate and said auxiliary clamp in the direction oft
the stitch-receiving aperture elongation.
foot, clamp-closing means applied to said lever, '
work-supporting plate mounted upon’said- bed`
and having aneedle aperture therein, _of a work;v
an auxiliary clamp member containing a needle
aperture in one end lportion thereof, said aux
l2._The combination with a sewing machine i.
having -a- bed, and a smooth surfaced stationary
clamp havingA a lower plate lslidable longitudiàï
nally of but ñxed laterally with relation to said
within said stitch-receiving aperture, means to
Work-supporting plate, a clamp-lever carried on
connect that end of the auxiliary clamp remote
said lower plate, a clamp-foot carried by said
from the needle aperture with said bed, and 30 lever and having a rectangular stitch-receiving
feeding mechanism to move said foot and the
opening and work-gripping portions at the sides
work thereunder relative to said work-supporting
of said opening clampingly opposed to said work
plate and said auxiliary clamp for the reception
supporting plate, an auxiliary clamp member
having one end portion thereof slidably received
ofstitches.
'
8. A work-clamp comprising a stationary bed,
longitudinally within said stitch-receiving open
a work-supporting plate carried by said bed, a
ing, means to pivotally connect the other end por
clamp-foot having a work-gripping surface op
tion of said auxiliary clamp to said bed, and
posed to said plate, an arm carrying said foot,
feeding means to move said work-clamp longi
an auxiliary presser~member having a needle
tudinally of and relative to said work-support
aperture therein, one end of said auxiliary presser 40 ing plate and said auxiliary clamp.
being pivotally secured to said bed and having
13. The combination with a Sewing machine
the other end thereof carried by said clamp-foot,
having a bed, a smooth lsurfaced stationary
clamp-closing means applied to said arm for
work-supporting plate mounted upon said bed,
pressing the clamp-foot and auxiliary presser
and stitching mechanism including a needle
upon the work resting upon said work-supporting 45 adapted to perform a group of barring stitches,
iliary clamp being slidably received lengthwise
plate, and feeding mechanism to move said
of a work-clamp having a lower plate slidable
clamp-foot and the work thereunder relatively to
said work-supporting plate and said auxiliary
longitudinally of but ñxed laterally with relation
to said work-supporting plate, a clamp-lever car
presser.
ried on said lower plate, a clamp-foot carried by
9. A sewing machine work-clamp comprising 50 said lever and having a rectangular stitch-re
ceiving opening, work-gripping portions at the
a stationary bed, a work-supporting plate car
ried by said bed, a clamp-foot opposed to said
sides of said opening clampingly opposed to Isaid
work-supporting plate, an auxiliary clamp mem
work-supporting plate, said foot having a rec
tangular stitch-receiving aperture, means at the
sides of said aperture to grip work resting upon
said plate, auxiliary presser means carried by
said foot and positioned within the aperture
thereof, a lever supporting said foot, clamp
closing means connected to said lever for pressing
ber having a needle aperture in an end portion
thereof which is slidably mounted within a pair
of parallel grooves, each of said grooves being
provided longitudinally of and adjacent the bot
tom edge of one of the opposite side walls of said
stitch-receiving aperture, means connecting that
the foot and said auxiliary presser upon the 60 end of said auxiliary clamp remote from the
work resting upon said plate, means pivotally
needle aperture with said bed, and feeding means
to move said work-clamp longitudinally of and
connecting said auxiliary presser to said bed,
and feeding mechanism to move said foot and
relative to said work-supporting plate and said
auxiliary clamp.
the work thereunder relatively to said work
supporting plate and said auxiliary presser 65
14. In a sewing machine having a bed, a sta
means.
10. A work-clamp for sewing machines having
tionary work-supporting plate >mounted upon
said bed, and stitching mechanism including a
needle, a two-part work-clamp comprising one
member having a rectangular stitch-receiving
portion opposed to said work-supporting plate 70 aperture, a second member slidably mounted
lengthwise within said aperture, work-gripping
and having an elongated stitch-receiving aper
means provided at the bottom face of one of said
ture, work-clamping portions at the under face
of said foot at the sides of said aperture, an ' two members, means to press said two members
toward said Work-support, means to feed one of
auxiliary presser member slidably mounted
lengthwise within said aperture, means connect 75 said members and the work beneath the same
a stationary bed with a work-supporting plate
carried thereby, said clamp comprising a foot
7 _
8 .
pastésaîdstitehingmechanism;and.means toholdtï;
moving-„1said._;needlexandmvorkèclamp ¿lengthwisey
the‘iiothernmemben ,ñxed :relativej’coesaidzfvvorkëwt
ofthe >Workeelanrngi `openin`g„.an«;i„a „Work-pnesserli
slidably supported by;V said. Workaclamp :at;,opposi.
supportingplatew;
`
,
.
’
15.21111 .fa ¿sewingemaßhineehavingzfa „rbedfa .stas Y,
site;> sides .of „ said work-clamp >opening .foriirela
tionary-,fwork-supporting Y. plate.: mounted:Y upon. i 5 , tive :movement îofgthe. Work-Aclamn; and îworke,
said bed;- ,and stitching mechanism ¿including .a
presser;> lengthwise. ¿of . said - opening, ~ said work-f.
needle adapted-to performr a :group ~_of~ »barring
pigesservextending ¿across said; work-clamp ¿operi-3;;l
ingi‘inthefregion of A’che path'ßf reciprocationßf - .
stitches,; a >two-pari;v work-clamp Acomprisingl _one
member» ‘ha-ving ga stitch-receiving aperturef- a
second member hallíngea Yneedle aperture therein,
saidf needle;.;.
.10 .
said >second.memberloeing directlyppposed „to >said f
work-‘supportineplaîce:and lbeing¿positioned` be
tween the aperture-definingside-walls of -saîcll
first member, Work-gripping means provided 'at
theY bottom face of. one ,of I*said >“cvvo members,
means to press each of said Amembers toward said
bed,_means to raise>` both-members simultaneously
1'î{«.¿§In¿„ a ç sewinggmachine‘,` _ing Combinationrf
stitchfiormingl »mechanisms .includingV „a „'reeinrof;`
eatery-` ¿needle-p a ._workfelamp ,provided> with ¿a .f
needle?clearanceÍ
mevinggsaidl-needle
opening;
¿and Work-clamp
means `-for`lengthwise@
. relatively
of v,the ‘f work-clamp; openingßna „work-pressen 4dis?.
posedwithinsaid onenineßfilme..W0rkfclalnfrp»andA »
having; a a f lmvftiexlf;` thereof-f extending; entirely
acrosszsaid opening
.the Vregion .0f the pathfof y
0E vtherwork,_means tovfeedone of said mem
bersand the work beneath-,the »same .past-„said
recipyoeajqien „of -saidr needle-¿and supporting,
stitching mechanism, andmeans feo holdthenot‘her
Amearvls»r providing ¿for frelative ‘ lmovement; »Lof-1 said .l
member fixed relative `to said@¿work-supporting ~
p1ate.¿
Work-:clamp Vsand- Work-presserr ¿lengthwise yof, ‘saidY f«
needle-clearance opening, and iorïpreventing. ¿rel-1, »
16. In a sewing machine, in cambination,
stitch-forming mechanismy includingy a recpro
catory needle, a l,Work-clamp provided »with a
presser in a direction normal-ítofthefplaneof the.:
needlefclearance .,opening, means forv relatively
ative. movement» of », said! work-elamp‘fand _,-vvorl‘z-fj Y
vvork.-l Y
ALFRED , R. 1WOOD. _
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