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Патент USA US2406623

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Aug. 27,1946.
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w_ MYERS
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2,406,623
WORK-GUIDING MECHANISM FOR SEWING MACHINES
Filed Dec. 30, 1943
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5253.51‘
Aug. 27, 1946.
- w, MYERS’
' 2,406,623
rWOBK-(“JIDING’v MECHANISM FOR SEWING MACHINES
Filed Dec. 30, 1945
2 Sheets-Sheet .2
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Patented Aug. 27, 1946
a
2,406,623
UNITED. STATES PATENT OFFICE»
‘WORK-GUIDING MECHANISM FOR SEWQING
MACHINES
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Walter Myers, Stratford, Conn., assignor to The
Singer Manufacturing Company, Elizabeth,
N. J ., a corporation of New Jersey
Application December 30, 1943, ‘Serial (No. 516,158
15 Claims.
(01. 112-2) ~
1
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chines for spiral stitching purposes, such as
spirally stitching the brims of sailors’ hats.
The invention has for an object to provide a
work-shifting mechanism assembly unit with
‘which sewing machine units may be conveniently
or interchangeably associated.
Another object of this invention is to provide
means facilitating accurate repositioning of a
traveling work-guide, as for example in the event
of thread breakage in spiral stitching operations.
Other and more speci?c objects of the invention
will be apparent from the following description
and‘claims.
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turally substantially the same as disclosed in the
U. S. Patent of S. ‘ZOhis,'N0. 2,267,581, Dec. 23,
1941;, it‘will be understood from‘the following de
scription that other kinds" and varieties of stitch
This invention relates to work-guiding mech-.
anisms employed in connection with sewing ma
forming‘and ‘work-feeding mechanisms could be
employed'witho'ut departing ‘from ‘the spirit and
scope of the'present invention. '
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‘ As more fully shown and described in said prior
Patent No. 2,267,581; the sewing machine illus
trated has a; vertically re'ciprocatory needle “land
a complemental loop-taker I5; said loop-taker be
ing “rotated'by suitable connections ‘(not shown)
- with a bed-shaft 16 disposed at the underside and
extending horizontally lengthwise of the bed-plate
The bed-shaft‘l? is "rotatably'journaled in
a‘ballebearing I‘! supported by'the' bed-plate Ill
15 II).
The invention comprises the devices, combina
and, adjacent said ball-bearing‘l'l, a peripherally '
tions and arrangements of parts hereinafter de
.grooved pulley i8 is secured bya screw 19‘ upon
scribed in connection with the accompanying
the end of ‘the bed-shaft l6 which is disposed
drawings, which illustrate a preferred embodi
20 below the bracket-arm standard ll. -Engaging
ment of the invention and in which:
Fig. 1 is a perspectiveview of a sewinginachine
unit supported by a base-unit which contains the
improved work-guiding mechanism. Fig.’ 2 repre
sents a vertical section of the work-guide carrier
taken lengthwise of the guide-carrier adjusting 25
spindle. ‘Fig. 3 represents a fragmentary vertical
section of the guide-carrier, taken substantially
on the line 3-—3 of Fig. 2 and showing‘ a portion
of a modi?ed lead-screw.‘ Fig. 4 is a top-plan view
the pulley I8 is a clip-belt-ZO by means of which
the bed-shaft 1-6 is rotated once for each complete
reciprocation of the needle I 4. '
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' The work is advanced across the bed-plate It]
by a‘ conventional feed-dog 2| which operates
through a work-supporting throat-plate 22 and
is opposed in its work-engaging movements by a
spring-depressed presser-foot 23.
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' The sewing machine above generally described
of the work-guide with the top plate of the work 30 is removably supported upon a base-unit having
a frame including a hollow pedestal 24 and a
guide removed and showing a portion of the lead
trough-shaped‘arm 25 extending laterally from
screw. Fig. 5 represents horizontal sections taken
the upper portion of the base 24 andfree at its
at different levels of the right'hand' end portion
outer end. The arm 25 of the base-unit and the
ofthe base-unit pedestal; the sections being taken
in substantially the horizontal planescontaining :35 sewing machine bed-plate l0, together provide a
free work-arm adapted to accommodate endless
the axes of rotation of the respective shafts
shown. Fig. 6 represents a vertical section of the
intermediate shaft driving worm and taken on
works"
Secured by screws ZBupon
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the front
.\ face
-. of the
substantially the line B—6 of Fig. 5. Fig. 7 repre
sents a vertical section of the work-guide and its
carrier, the section being taken' in substantially
bearing bosses 28 - and 29 having horizontally
the vertical plane containing the rotation-axis of
pedestal 24 is a bracket 21 formed with spaced
alined apertures 30 and 3|. Rotatably journaled
in, the bearing-apertures30,;3| of the bracket 2'!
is a horizontally disposed shaft 32 extending
lengthwise of the base-unitarm- 25 and having
the lead-screw. Fig. 8 represents a verticalsec
tion of’a portion of the base-unit pedestal and
of the sewing machine bed-plate, the section be 45 one end portion thereof in the region'of the free
end of the work-arm freely suspended.’ The shaft
ing taken in substantially the vertical plane con
taining the axis of rotation of the intermediate
32 is held against endwise-movement in the bear
ing-bossesZB and 29 by suitable collars 33. The
shaft which engages the lead-screw shaft.
suspended portion of the shaft 32 is provided with
The sewing machine unit illustrated in Fig. 1
of the drawings'has a bed-plate [0, from one end
of which rises the hollow standard H of a
bracket-arm ' l2 which terminates in a head l3
and overhangs the bed-plate Ill- .While the stitch
forming and work-feeding mechanism of the
a spiral thread 34' of slow lead to form a lead
screw; the spiralthread 34 extending from the
free end of the shaft 32 and preferably terminat
ing'short of the bracket-boss 28. Adjustably se
cured upon the shaft 32, between the lead-screw
sewing machine shown in theidrawings is struc~ 55 thread'thereof and the bracket-boss 28, is a stop
2,406,623
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collar 35, of which the function will be hereinafter
described.
The end of the lead-screw shaft 32 opposite to
the threaded end thereof is provided within the
bracket-boss 29 with a worm-gear 36. hi driving
pinion 63 functions as a follower-nut which is
complemental to the lead-screw thread 34 in ef
fecting feeding of the carrier 53 lengthwise of
the shaft 32 during rotation of said shaft 32.
However, the spindle 62 may be readily rotated
by manual manipulation of the nut 66 when the
engagement with the under side of the worm
shaft
is stationary, to attain accurately any
gear 36 is a worm 37 carried by the forward end
desired position of the carrier 53 upon the shaft
of an intermediate shaft 38 disposed horizontally
32. As the lead-screw end portion of the shaft
transverse to the shaft 32 and extending into an
opening 39 provided in the bracket~boss 29. The 10 32 is free of the supporting base 24, the carrier
‘55 may be conveniently applied to and removed
intermediate shaft 33 is journaled eccentrically in
from the shaft 32 endwise thereof.
a bearing-bushing '40 secured by a screw 4! for
Any suitable form of Work-guide may be asso~
turning adjustment in an internal bearing-lug 42
ciated with the carrier 53. The tubular work
of the pedestal 24. This construction not only
provides for convenient assembly of the shafts 32 .15 guide illustrated in Figs. 1, 4 and '7 of the draw
ings comprises adjacent bottom-plates 519i and ‘ill
and 38 in the proper intermeshing relation of the
individually secured for adjustment relative to
worm-gear 36 and worm 31, but also facilitates
each other upon the carrier 53 by pairs of screws
replacement of the lead-screw-shaft 32.
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ii and. 72 passing freely through elongated coun
Secured upon the rearward. end of the interme
diate shaft 38, by a screw 43, is a worm-gear 44 20 tersunk slots '53 and ‘i4 provided in and extend
ing transversely of the respective plates. The
engaged by a driving worm 45, disposed above the
plates 59 and ‘ill have segmentally curved side
worm-gear. 44 and rotatably journaled upon a
?xed stud 43. As illustrated in Figs. 5 and 6 - edges, and the relatively remote curved side edges
of the respective plates are bent upwardly and
of the drawings, the stud 45 is secured bv a screw
v4‘! in a wall of the pedestal 24 to extend inwardly 25 backwardly to form ?anges overhanging the
plates, thereby to provide spaced and opposed
from said wall in substantial axial alinement with
edge-guides ‘l5 and it. Detachably supported by
the bed-shaft E6 of the sewing machine and in
parallel relation to the lead-screw shaft 32.
At
the overhanging side'flanges of the plates 59 and
73, in spaced relation to said plates, is a top
its inner end, the worm 45 has a driven-member
in the form of a ?ange 48 provided with a crank 30 plate 'l'l having'its front edge portion bent back
upon itself to form a loop 18 entered by the front
pin 49.
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ends of said ?anges. 'The right hand edge por
The bed-shaft pulley it of the sewing machine
tion of the top-plate ‘H is provided at the upper
has an internal hub l3". Secured by a screw 53
side thereof with a supporting and. locating block
upon the pulley-hub I8’ is a recessed driver
‘it which is recessed to receive the ?ange of the
member in the form of a collar 5! provided with
a crank-pin 52 disposed to engage the crank-pin
49 of the worm 45, thereby to rotate said worm
45 with the bed-shaft I6. The described driving
bottom-plate ‘ill, thereby to support and to lo
cate the right hand edge of the top-plate T! in
spaced relation to the edge-guide '15. By this
means, increased clearance is provided within
arrangement for the worm 45 provides for ready
removal of the sewing machine unit from the 40 the work-guide at the right hand side thereof,
base-unit’ and permitsrof convenient association
of a sewing machine unit or different sewing ma
for work having a rib at one edge as in sailors’
hat
brims.
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The described Work-guide merely rests upon
the bed-plate ill of the sewing machine; the con
Slidably supported upon the threaded free end
portion of the lead-screw shaft 32, for travel 45 nection between the workéguide carrier 53 and
the lead-screw shaft 32 permitting pivotal move
lengthwise of said shaft and, therefore, cross
'ment of the carrieri53 upon‘said shaft. ‘This
wise of the line of feed of the sewing machine,
construction’ therefore provides for readily
is a work-guide carrier 53 having a lead-screw
swinging the work-guide forwardly about the
shaft receiving aperture 54, Extending forward
chine units with the base-unit.
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ly from one end of the carrier 53 is a boss 55 50 shaft 32 into an out of the way‘positi'on.
having an aperture 56 extending transversely of
the aperture 54 and connected therewith by a
follower-clearance opening 51. Secured inv the
carrier-boss 55 by a screw 53, for turning ad
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While'o-bviously capable of other uses, the pres
ent improvement is particularly well adapted for
spirally s-titching'the brims of‘ sailors’ hats. "The
brim to be‘ stitched ispassedthrough the work
justment, is a bearing-bushing 53 formed with a 55 guide and is directed by the edge-guide 'Hi'thereof
during the feeding of the brim by the ‘feed-dog
?ange 60 in engagement with the front end of
22 across the bed-plate Ill. ' In the operation of
thecarrier-boss 55. The bearing-bushing 59 is
eccentrically provided with a, bearing-aperture ' the sewing machine, the‘work is fed past the
stitch-forming mechanism, across the bed-plate
Rotatably journaledin the bearing-aperture 6! 60 ill, by the feed-dog 21 and ‘is at the same time
progressively shifted sidewise to the right by the
of the bushing59is a spindle 62 extending hori
rotating lead-screw '32.
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zontally transversely of the shaft 32 vand pro
In‘ its sidewise travel, the work-guide? carrier
vided .at its rearward end with a cylindrical head
53 ultimately engages'the stop-‘collar 35 and is
63 held in frictional engagement with the inner
end of the bushing 59. The spindle-head 63 com 65 thereby arrested in a location' of the work-guide
predetermined by the setting of the stop-collar
prises a pinion having teeth 54 formed to mesh
35. This is permitted in the int'ermeshing rela
with the lead-screw thread 34 of the shaft 32.
tion of the spindle '33‘ and'the lead-screw thread
Securedbv a screw 65v upon the forward end of
34, by reason of the vfact that the positive stop
the spindle E2 is a knurled nut 55 having an
axial cavity 61. Housed'in the nut-cavity 6? is 70 ping of the carrier 53 by ‘the collar 35rserves to
overcome the rotation-‘restraining friction. im
a coil-spring 68 interposed between the nut 66
posed by the spring '58 upon the pinion 63, there;
and the bushing 53 and functioning to restrain
by inducing the spindle 62 to rotate idly in the
the spindle 62 against rotation during stitching
operations of the sewing machine. When the
spindle 62 is thus restrained against rotation, the 75 In ‘the modified‘ form of construction" illus
carrier 53.
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‘2,406,623
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said lead-screw, and operative connections’for
rotating said intermediate shaft from said driver
trated inFig, 3 ‘of thedrawings, a, substitute
rotary shaft 32' having‘ a spiral lead-screw thread
34' is provided with a circumferential groove 80
at a location in the length of the shaft which
corresponds, substantially to the position of the
left hand end of the stop-collar 35 above de
scribed; In this form of construction, the pinion
member.
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T 4. A spiral stitching mechanism comprising, in
combination, a base-unit including a supporting
pedestalhaving a lateral arm free at one end,
a, lead-screw rotatably supported by said base
'unit and extending lengthwise of said arm, a
work-guide operatively connected to said lead
10 screw to derive lateral movements therefrom
the carrier to rest.
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upon rotation of the lead-screw, a sewing machine
Having thus set forth the nature of the inven-'
63 rides off thelead-screw thread 34,’ in the travel
of the WQrk-guidecarrier 53, thereby bringing
tion, what Iclaim herein is: ,.
unit removably supported upon said base-unit
,
,1, A spiral stitching mechanism comprising, in
combination, a base-unit including a supporting
and having a frame including a bed-plate and a
bracketearm overhanging the bed-plate, said sew
pedestal'having' a lateral arm free at one end, a 15 ing machine unit containingv stitch-forming and
lead-screw rotatably supported by said base-unit
and ‘extending lengthwise of said arm, a work
guide operatively connected to said lead-screw to
derive lateral movements therefrom upon rota
tion of the lead-screw, a sewing machine unit re
movably Supported upon said base-unit and hav
ing a frame including a bed-plate anda bracket
work-feeding mechanism including a rotary bed
shaft disposed below said bed-plate and substan
tially parallel to said lead-screw, a driver-mem
ber carried by said bed-shaft for rotation there
20 with, a driven-member journaled upon said ped
estal coaxially of , said bed-shaft and disposed
for rotating engagement by said driver-member,
arm overhanging the bed-plate, said sewing ma
a bearing-bushing extending crosswise of ‘said
chine unit containing stitch-forming and work
lead-screw and supported by said pedestal for
feeding mechanism including. a rotary driver
member, a driven-member journaled upon said
turning adjustment about its longitudinal axis, an
intermediate shaft rotatably journaled eccentri
pedestal coaxially of said driver-member and
disposed for rotating engagement by said driver
member, and operative connections with said
tating gears connecting driven-member, inter
driven-member for rotating said lead-screw’.
2. A spiral stitching mechanism comprising, in
combinatioma base-‘unit including a supporting
5. A work-guiding base-unit support for sewing
machines, comprising, a pedestal having a lateral
cally in said bearing-bushing, and lead-screw ro
mediate shaft and lead-screw.
arm free at one end and adapted to support a
pedestal having a lateral arm free at one end, a
lead-screw rotatably supported by said base-unit
and extending lengthwise of said arm, a work
guide operatively connected to said lead-screw to
derive lateral movements therefrom upon rotation
sewing machine, a lead~screw shaft rotatably sup
ported by said pedestal and extending lengthwise
35 of said arm, said shaft having a threaded free end
of the lead-screw, a sewing machine unit remov
ably supported upon said base-unit and having a
frame including, a bed-plate and a bracket-arm all)
overhanging the bed-plate, said sewing machine
unit containing stich-forming and work-feeding
mechanism including a rotary bed-shaft disposed
below said bed-plate and substantially parallel to
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portion of its length disposed in the region of the
free end of said work-arm, a crank-member sup
ported by said pedestal for rotation about an axis
substantially parallel to the axis of rotation of
said lead-screw shaft, an intermediate shaft ro
tatably journaled in said pedestal and having gear
connections with said crank-member and said
lead-screw shaft, a work-guide carrier supported -
bed-shaft and having a crank-pin, a driven-mem
to travel lengthwise of said lead-screw shaft, and
a follower-nut supported by said carrier and dis
ing a frame including a bed-plate and a bracket
restraining said pinion against rotation, thereby
said lead-screw, a driver-member carried by said
posed in carrier-propelling engagement with the
ber journaled upon said pedestal coaxially of said
thread of said lead-screw shaft.
bed-shaft and having a crank-pin disposed for
6. In a work-guiding device for sewing ma
engagement by said crank-pin of the driver-mem
chines,
a rotary shaft restrained against endwise I
ber, an intermediate shaft rotatably journaled in 50
movement and provided with a lead-screw thread,
said pedestal and extending crosswise of said lead
a work-guide carrier adapted to be propelled end
screw, worm and worm-gear connections between
wise of said shaft, a pinion rotatably journaled in
said driven-‘member and said intermediate shaft,
said carrier and disposed in mesh with the lead
and worm and worm-gear connections between
screw thread of said shaft, and means for re
said intermediate shaft and said lead-screw.
straining said pinion against rotation, thereby to
3. IA. spiral stitching mechanism comprising, in
convert said pinion into a follower-nut.
combination, a base-unit including a supporting
7. In a work-guiding device’ for sewing ma
pedestal having a lateral arm free at one end, a
chines, a rotary shaft restrained against endwise
lead-screw rotatably supported by said base-unit
and extending lengthwise of said arm, a work 60 movement and provided with a lead-screw thread,
a work-guide carrier adapted to be propelled end..
guide operatively connected to said lead-screw to
wise of said shaft, a pinion rotatably journaled in
derive lateral movements therefrom upon rota
said carrier and disposed in mesh with the lead
tion of the lead-screw, a sewing machine unit re
screw thread of said shaft, and friction means for
movably supported upon said base-unit and hav
to convert said pinion into a follower-nut.
arm overhanging the bed-plate, said sewing ma
8. In a work-guiding device for sewing ,ma
chine unit containing stitch-forming and work
chines, a rotary shaft restrained against endwise
feeding mechanism, a rotary driver-member car
movement and provided with a lead-screw thread,
ried by the sewing machine mechanism, a bear
ing-bushing extending crosswise of said lead TU a Work-guide carrier adapted to be propelled end
screw and supported by said pedestal for turning
wise of said shaft, a spindle rotatably journaled
adjustment about its longitudinal axis, an inter
in said carrier and extending cross-wise of said
mediate shaft rotatably journaled eccentrically
in said bearmg-bushing, Worm and worm-gear
shaft, said spindle having a peripherally toothed
head in mesh with the lead-screw thread of said
connections between said intermediate shaft and 75 shaft, and means for restraining said‘ spindle
2,406,623
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against‘rotation, thereby to convert vsaid head
into a vfollower-nut.
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lead-screw shaft ‘extending throughyone of the
apertures of and 'slidably supporting saidcarrier,
a spindle rotatably journaled in the other aper
ture of said carrier, a pinion carried by one end
of said spindle and disposed in mesh with the
thread of said lead-screw,rmeans carried by the
other end of said spindle and disposed externally
of said carrier for manually rotating said pinion,
carrier for turning adjustment about an axis
and means for securing said spindle against rota
transverse to the rotation-axis of said shaft, a
spindle rotatably journaled eccentrically in said 10 tion, thereby to convert said pinion into a fol
lower-nut.
bushing and carrying a pinion in mesh with the
13. In a work-guiding device for sewing ma
lead-screw thread of said shaft, and means» for
chines, a rotary shaft restrained against endwise
restraining said spindle against rotation, thereby
movement and providedwith a lead-screw thread,
to convert said pinion into a follower-nut.
10. In a work-guiding device, for sewing gma— 15 a work-guide carrier adapted to be propelled end
wise of, said shaft, a pinion rotatably journaled
chines, a rotary shaft restrained against endwise
in said carrier and‘ disposed in mesh with the
movement and provided with'a lead-screw thread,
lead-screw thread of said shaft, manually oper
a work-guide carrier adapted’to be propelled end
abiermeans for rotating said pinion, and means
wise of said shaft, a pinion in mesh with the lead
for securing said pinion against rotation, thereby
screw' thread of ‘said shaft and journaled in said
to convert said pinion into a follower-nut.
carrier for rotation about an axis transverse to
14. In a work-guiding device for sewing ma
the rotation axis of said shaft, means providing
chines, a rotary shaft restrained against endwise
forsadjustment of said pinion toward and from
movement and provided with a lead-screw thread,
‘ said shaft, and means for restraining said pinion
a work-guide carrier adapted to be propelled end
against rotation, thereby to convert said pinion
9. In a work-guiding device for sewing nia
chines, a rotary shaft restrained against endwise
movementand provided with a lead-screw thread,
a work~guide carrier adapted to be propelled end
wise of said shaft, a bushing journaled in said
wise of said shaft, a pinion rotatably journaled
intoafollower-nut.
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11. In a work-guiding device for sewing ma
chines, a rotary shaft restrained against endwise
movement and provided with alead-screw thread,
a work-guide carrier adapted tobe propelled end
wise of said shaft, a spindle journaled in said
carrier for rotation about an axis transverse to
the rotation-axis of said shaft, a pinion carried
by said spindle and disposed in mesh with the
lead-screw-thread of said shaft, a manually ro- ‘
tatable nut carried by said spindle for rotating
said pinion, and spring means for frictionally
securing said‘spindle against rotation in said car
rier, thereby to convert saidpinion into a fol
lower-nut.
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12. In awork-guiding device for sewing .ma
chines, a rotary shaft restrained against endwise
movement and provided with a lead-screw thread,
a transversely apertured work-guide carrier, a
in said carrier and disposed in mesh with the
lead-screw thread of said shaft, yieldable means
for securing said pinion against rotation, and
means limiting the travel of said carrier in one
direction.
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25. In a work-guiding device ‘for sewing ma
chines, a rotary shaftrestrained against end
wise movement and provided with a lead-screw
thread, a work-guide carrier adapted to be pro
pelled endwise of said shaft, a pinion rotatably
journaled in said carrier and disposed in mesh
with the lead-screwthread of said shaft, yield
- able means for securing said pinion against rota
tion, and a stop-member carried by said shaft
and disposed in the path of movement in one
direction of said carrier.
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WALTER MYERS.
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