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Патент USA US2405253

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4
ug. G, 34.
I
J. HICKEY
2,4@,253
BUTTONHDLE ATTACHMENT FOR SEWING MACHINES
Filed Nov. 13, 1944
3'Sheets—$heet l
INVENTOR
JAMES
°
HICKE‘Y
ATTORNEYS
'
‘13%: $9 H
.
I
_J. HIICKEY
BUTTONHOLE ATTACHMENT FOR SEWING MACHINES
Filed Nov. 13, 1944
3 Sheets-Sheet 2
INVENTOR
,HLCKEY
ATTORNEYS
,
Aug.‘ 6, 1946.
J_ HICKEY I
V
2,465,253
BUTTONHOLE ATTACHMENT FOR SEWING MACHINES
‘Filed Nov. 13, 1944
'
3 Sheets-Sheet 3’
“'. Egg MW
Ill
\
INVENTOR
JAMES
‘
HICKEY
6 WWW
-
ATTQRNEYS
Patented Aug. 6, 1946
' '
UNITED STATES FATENT caries
nU'r'roNnoLn ATTACHMENTFOR sE'WiNG'
-
MACHINES
James Hickey, Portland, Oreg. _
Application November 13, 1944, Serial No. 563,221
i
6 Claims.
This invention relates to devices adapted to
perform the necessary stitching in the ?nishing
of buttonholes.
More speci?cally, this invention relates to re
movable buttonhole attachments suitable for use
with an ordinary sewing machine.
Buttonhole attachments equipped to perform
zig-zag stitching around a buttonhole are more
(01. 112-47) ‘
Figure 7 is a view inperspective of certain
individual members in my device illustrating the
same separated from each other for the sake of
clarity but arranged more or less in their re-.
lated order;
'
Figure 8 is a .plan section taken on the line
8-—8 of Figure 3;
_
Figure 9 is a fragmentary .plan view of some
or less common. However, I have found that a
fault with a number of devices of this type is 16 of the .bottom members of my device illustrating
the operation of the restriction‘ bracket when the
that they do not provide for double length zig
bracket is in the raised position shown in Figure
zag stitches at the ends of the hole or slit in
5;and\,
V.
I
the cloth. Such double length stitches are de
Figure,
10
is
a
similar
fragmentary
plan view
sirable for reinforcingthe ends of the button
hole and for preventing the buttonhole from 15' illustrating the operation of, ‘the restriction
bracket and stitch-control lever when the re
stretching or tearing. Such double length stitch
striction
bracket is in the lowered position of
ing is provided for in some of the special button
Figure 6.
_
.
g
j
.
hole machines but these involve quite compli
Referring ?rstito Figure 1, the buttonhole rat
cated mechanism and are generally not mere ate
tachment is secured in the customary manner to
tachments for ordinary sewing machines.
20 thezpsewing Qmachine presser foot bar it after
The object of this invention is to provide means
the usual cloth-‘engaging element has been re—,
for performing such double length end stitching
moved from the base of the presser foot. bar.
with a simple buttonhole attachment, suitable for
The attachment carries its own cloth-engaging
use with ordinary sewing machines, whenever
element [8 which rests on and engages the cloth
such double length stitching is desired.
it when the machine presser foot bar has been
A further object is to control the double length
dropped
to lowered position in the sewing ma
stitching, so that it may or may not be per
chine head IG.
‘
.
I
formed, and also arrange to have the double
The cloth-engaging element is is in the usual
length stitching performed automatically when
desired.
80 form of a hollow rectangle and the sewing ma
chine needle i3 passes through the opening in
An additional object of this invention is to
the same, the opening being wide enough to pro
provide for such improvement in a simple, prac
vide for the maximum length of zig-zag stroke
tical and inexpensive manner so that the im
as the cloth is moved back and forth under the
provement can be incorporated in ordinary but~
sewing machine needle by the attachment. The
tonhole attachments at very small additional 35 cloth-engaging
element 58 has the usual ser
cost.
‘
rated bottom surface to grip the cloth and to
In the accompanying drawings:
move it back and forth under the needle, result
Figure 1 is a View, in isometric perspective, of
ing in the familiar zig zag buttonhole machine
a portion of an ordinary sewing machine head
stitching.
’
‘
with my improved attachment secured in place, 40
The attachment includes an integral frame it
and also showing a piece of cloth on which the
desired buttonhole stitching has been performed.
having side portions and bottom connecting strips
and’ also having“ alhorizontally extending forked
Figure 2 is a medial longitudinal sectional
arm 16 which is connected to the presser, foot
elevation viewed from the far side of Figure 1;
Figure 3 ‘is an elevation of the attachment 45 bar I 1 Vin the customary manner. ‘ The feed blade
H (see also Figure 7) restsloosely in the frame
viewed from the far side of Figure 1;
l5, by which it is reciprocally and slidably sup
Figure 4 is a staggered plan section corre;
ported, and the cloth-engaging element“! is at
sponding to the line 4-4 of Figure 3;
tached below the forward end of the feed blade
Figure 5 is a fragmentary transverse section
corresponding to the line 5—5 of Figure 4, show 50 I‘! as usual. The feed blade I‘! is formed with
a pair of longitudinal slots ll’ and also has an
ing the end of the restriction bracket in normal
integral slotted arm £9 at one side extending
raised position;
vertically upward.
Figure 6 is a similar fragmentary transverse
section but showing the restriction bracket in
lowered position;
‘A lever arm 29 (see Figures 1 and '3), pivotal
ly mountedOI.1 the frame it vfor up and down
55 movement'has a forked end 3! which is adapted
2,405,253
3
to be attached tothe needle carrier H of the sew
ing machine and thus is reciprocated up and down
with the movement of the needle carrier and
needle l3. The arm 29 carries a pawl 35 (Fig
ure 3) which engages a ratchet 34. The ratchet
34 is secured to a shaft 33 on which is also se
cured the central cam wheel 32. The periphery
of the cam wheel 32 engages the upstanding lugs
31 (see also Figures 4 and 7) mounted in the
stitch control lever' 36. Thus reciprocation of
4| and has a ?nger grip or adjustment lug 41.
The restriction bracket is hinged to the frame l5
for up and down movement (Figures 2, 3 and 4),
and a spring 42 holds the bracket normally in
the raised position shown in Figure 2 so that
only the top portion 4|! of the tongue 39 of the
stitch control lever 36 will extend through the
slot 44.
, On the cam disk 23 I provide two pins 46 at
diametrically opposite points near the periphery.
These pins are so arranged 'as to engage the end
the arm 29, by producing step by step rotation of
the cam wheel 32, also produces corresponding
. of the slidable arm 45 of the restriction bracket
reciprocation or oscillation sideways of the stitch
control lever 36. A downwardly extending tongue
38 at the forward end of the stitch control lever 15
38 engages a slot in the feed blade l1.’ Conse
quently, the feed blade l1, and with it. the cloth.
which is engaged by the element |8 of the feeds
blade, reciprocates sideways at each stroke ofthe ‘
needle, which results in the zig-zag stitch common
to buttonhole machines and attachments.
other words, with each half rotation of the cam
disk 23, one of the pins 46 will cause the restric
tion bracket 4|, to be pushed down to lowered
.position temporarily, but as soon as the pin moves
out of engagement with the arm 45 the spring
42 will cause the restriction bracket 4! to return
to normal raised position. The cam disk 23 and
4| alternately as the cam disk 23 is rotated. In
the crank disk 29- are both mounted on the same
shaft 2| and rotate in unison. The crank pin
20' of the crank disk 26 produces the longitudi
which is adapted to engage a ratchet member 22,
nal movement of the feed blade I] as previously
and the ratchet member 22 in turn is connected
by means (not shown) to a shaft 2|, and this 25 mentioned. The crank pin 26' is so arranged
with respect to the pins 46 that when the crank
part of the mechanism is so arranged as to pro
pin 29' moves into the horizontal plane of the
duce slower step by step rotation of the shaft
shaft 2|, that is, when the feed blade |'| reaches
2| as the arm 29 reciprocates.
the limit of its longitudinal movement in either
A disk 20 secured to the end of shaft 2| adja
cent the vertical arm H! of the feed blade |'| (see 30 direction,one of the pins 46 will ‘engage the arm
45 and push the restriction bracket 4| into low
Figures 1 and 4) has a crank pin 29' which en
ered position.
‘ >
gages the slot in the vertical arm l9. Thus, as
In Figure 5 the restriction bracket 4| is shown
they crank disk 29 rotates slowly, the feedblade
in normal raised position. In Figure 6 one of the
is gradually moved longitudinally, ?rst in one
direction and then in the opposite direction, while 35 pins 46 has been moved into engagement with the
arm. 45 and has pushed the restriction bracket
at the same time the feed blade is constantly
4| into lowered position. The effect of this change
reciprocated sideways. '
'7
,.
V
of position of the restriction bracket 4| will now
A cam disk 23, shown most clearly‘in Figures
The arm 29 (Figure 3) has a rear shoulder 39
4 and 7, is formed with two oppositely off-‘set simi
lar portions so that nearly one-half of the pe
riphery lies in one vertical plane while a similar
portion of the periphery lies in another verti
calplane spaced from the ?rst. The periphery
of thislcam disk 23 engages a pair of upstanding
be explained.
Referring to Figures 6 and 10, when the restric
tion bracket
wide portion
trol lever 36
of the stitch
4| is in lowered position with the
of the tongue 39 of the stitch con
extending through slot 44, the rear
control lever 36 will be held against
lugs 26 (see Figures 2 and 3) carried on a lever 45 oscillation‘ or reciprocal movement sideways.
Consequently, the rotation of the cam wheel 32
24, which is pivotally mounted at 25 and which
will produce greater oscillation of the other end
in turn is connected to an adjustable leverarm
of the stitch control lever 39 from which the
21. The forward ,end of lever arm 21 has a
tongue 38 extends and thus will produce greater
downwardly-extending tongue .28 which engages
a slot H’ in the feed blade |‘|. This connection 50 oscillation of the feed blade |‘|. But when the
restriction bracket 4| is in the normal raised
between cam disk 23 and feed blade |'| ordinarily
position shown in Figures 5 and 9 with only the
> causes the zig-zag stitching to be performed along
narrow top portion 49 of the tongue 39 extend
one side of the buttonhole slit as the feed blade
ing
through slot ‘44, the rear end of the stitch
i1» is moved longitudinally in one direction and
on the other side as the feed blade is moved lon 5.5 control'lever 36 will be moved sideways by the
cam wheel 32 before the forward end of the stitch
gitudinally in the reverse direction.
a I
control lever 36 is moved, and consequently the
The construction which I have described thus
subsequent oscillation- of the forward end or
far is for the most part well known and common
tongue 38 will be reduced. Thus when the re
to a familiar type of buttonhole attachment. -1
shall now explain the particular improvements 60 striction bracket 4| is pushed to the lowered
position of Figure 10, the feed blade |'| will be
which I have developed."
>
V '
r - r oscillated in a wider path than when the restric
The stitch control lever 36, the upstanding lugs
tion bracket 4| is in the normal raised position
31 of‘which are engaged by the-cam wheel 32,
of Figure 9. Since the restriction ‘bracket 4| is
and which in turn transmits horizontal recipro-e
cal movement sideways to the feed blade I1, is 65 pushed to lowered position when the feed blade
I‘! reaches the end of its longitudinal movement
formed with an upwardly extending tongue 39 at
in
either direction, the increased oscillation of the
the rear‘end. The upper half of this tongue is
feed blade H at such times results in the desired
considerably narrowed as shown at 49 in Figure
double length stitches at each end of the button
'7. A restriction bracket 4|, the shape of which
hole,
'
70
is also shown more clearly in ‘Figure "I, carries a
The principle on which my invention operates
rear cross bar’ 43 which is provided‘ with a slot
will be clear from Figures 9 and 10. In‘ Figure 10
44. The length of the slot 44 is only slightly
the
pivotal point of the stitch control lever 36 is
greater than the width of the lower half of-the
the rear end of the lever. In Figure 9 the actual
upstanding tongue 39. A. slidable arm 45 is
mounted on one side of the restriction bracket 75 pivotal point is ?rst located at the front end and
2,405,253
then moves to the rear end when the rear end
is temporarily held against further lateral move
ment in the same direction,
Consequently, as
previously explained, under this latter condition,
the period during which the front end moves is
6
3. In a buttonhole attachment of the charac
ter described, a feed blade mounted for longitu
dinal and lateral movement, a stitch control lever
located above said feed blade, the forward end
of said lever connected with said feed blade, an
upstanding tongue at the rear end of said lever,
a restriction bracket located above said lever‘, said
bracket hinged at its forward end for up and
is indicated at e at each end of the buttonhole, 10 down movement, a cross bar on said bracket, said
cross bar having a slot, the length of said slot
and the normal narrower intermediate zig-zag
corresponding approximately to the width of said
stitching along the two sides of the buttonhole
reduced and the extent of movement of the front
end of the lever 36 is correspondingly reduced.
In the ?nished buttonhole shown in the cloth
I 4 in Figure 1, this desired double length stitch
which takes place when the restriction bracket is
upstanding tongue, whereby said bracket will pre
in raised position is indicated at 1/ on both sides
vent oscillation of the ‘rear end of said lever when
said bracket engages said upstanding tongue, a
spring normally holding said bracket out of en~
gagement with said upstanding tongue, a cam
of the button hole,
If it is desired to dispense with the double length
stitching 2 at the ends of the buttonhole, all that
is necessary is to push the adjustment lug 41 of
the arm 45 (Figures 1, 4 and 7) forward so that
the rear end of the arm r15 will not be engaged by
the pins 438. On the other hand, if it is desired
to perform double width stitching only, for ex
ample, in mending or patching, instead of the
usual buttonhole stitching, this can be done by
pushing the adjustment lug 47 all the way back
moving said blade longitudinally‘ in alternate
directions, associated means for pushing said
bracket into lowered position whenever said blade
" bracket to lowered position will cause greater
under a shoulder 48 (Figure 1) in the side of the
continually in lowered position.
Various modi?cations could be made in my at
tachment within the scope of my invention and '
the stitch control lever or some equivalent mem
and rear ends of said lever and adapted to pro
duce lateral oscillation of said lever, means for
reaches the end of its longitudinal movement in
either direction, whereby the pushing of said
frame which will then keep the restriction bracket
without departing from the main principle of
providing means for changing the pivotal point of
wheel engaging said lever between the forward
lateral oscillation of the forward end of said lever
and of said blade.
4. In a buttonhole attachment for a sewing
machine, a feed blade mounted for longitudinal
and lateral movement, a stitch control lever lo
cated above said feed blade, means‘ associated
with the forward end of said lever connected with
said feed blade, an upstanding tongue at the rear
end of said lever, the upper portion of said tongue
ber mounted for lateral oscillation and connected
to the feed blade so as to modify the amount of 35
being of less width than the lower portion, a re
the lateral oscillation imparted to the feed blade.
I claim:
‘
1. In a buttonho-le attachment for a sewing ma
chine, a feed blade mounted for longitudinal and
lateral movement, means for moving said feed
blade longitudinally in alternate directions, a
stitch control lever connected with said feed blade,
cam means for producing lateral oscillation of
said stitch lever and therewith of said feed blade,
striction bracket located above said lever, said
bracket hinged at its forward end for up and
down movement, a cross bar on said bracket, said
cross bar having a slot, the length of said slot cor~
responding approximately to the width of the
lower portion of said upstanding tongue, whereby
said bracket will prevent oscillation of the rear
end of said lever when said bracket engages the
lower portion of said upstanding tongue, 2, spring
a restriction bracket associated with one end of 45 normally holding said bracket out of engagement’
said lever, an engaging element on said restric
with the lower portion of said upstanding tongue,
tion bracket for holding said end of said lever
a cam wheel engaging said lever between the for
against oscillation when said bracket is in full
ward and rear ends of said lever and adapted to
engaging position, whereby to increase the amount
produce lateral oscillation of said lever, a hori
of oscillation of the opposite end of said lever and
zontal rotating shaft located to the rear of said
therewith the amount of oscillation of said blade,
lever and bracket, a crank means connected with
and means for moving said bracket into full en
gaging position whenever said blade reaches the
end of its longitudinal movement in either direc
tion.
2. In a buttonhole attachment for a sewing ma
chine, a feed blade mounted for longitudinal and
said shaft for producing longitudinal movement,
of said feed blade in alternate directions, a pair
of bracket-engaging elements connected with said
55 shaft and so arranged as to engage said bracket
alternately and push said bracket to lowered'posi
tion whenever said crank mean-s has moved said
blade to the end of its longitudinal path in either
lateral movement, means for moving said feed
blade longitudinally in alternate directions, a
direction, whereby the pushing of said bracket to
stitch control lever connected with said feed 60 lowered position will cause greater lateral oscil
blade, cam means for producing lateral oscillation
lation of the forward end of said lever and of said
of said stitch lever and therewith of said feed
blade.
blade, a restriction bracket associated with one
5. In a buttonhole, attachment for a sewing
end of said lever, an engaging element on said
machine, a feed blade mounted for longitudinal
restriction bracket for holding said end of said 65 and lateral movement, a slot extending longitu
lever again-st oscillation when said bracket is in
dinally in said feed blade, 'a stitch control lever
full engaging position, whereby to increase the
located above'said feed blade, a downwardly ex
amount of oscillation of said blade, means con
tending tongue on the forward end of said lever
nected with said ?rst mentioned means for mov
extending into said slot in said feed blade, an
ing said bracket into full engaging position when 70 upstanding tongue at the rear end of said lever,
ever said blade reaches the end ‘of its longitudinal
the upper portion of said tongue being of less
movement in either direction, and a spring acting
Width than the lower portion, a restriction
normally to hold said bracket out of full engaging
bracket located above said lever, said bracket
position when said blade is in intermediate longi
hinged at its forward end for up and down move
tudinal position.
ment, a cross bar on said bracket, said cross bar
2,405,253
7
8
having a slot, the length of said slot correspond
ing approximately to-the width of ‘the lower por
tion of said upstanding tongue, whereby said
bracket will prevent oscillation of the rear end
of said lever when said bracket engages the lower
portion of said upstanding tongue, a spring nor
rnally holding said'bracket in raised position so
that only the upper narrower portion of said up
standing tongue will extend through said slot, a
extending into said slot in said feed blade, an up
standing tongue at the rear end of said lever, a
restriction bracket located above said lever, said
bracket hinged at its forward end for up and
down movement, a cross bar on said bracket, said
cross bar having a slot, the length of said slot
slidable arm on said bracket, an adjustment lug
on said arm, a cam wheelengaging said lever be
tween the forward ‘and rear ends of said lever and
spring normally holding said bracket out of en
gagement with‘ said upstanding tongue, a slidable
adapted to produce lateral oscillation of said
lever, a horizontal rotating shaft located to the
rear of said lever and bracket, crank means con
nected with said shaft for producing longitudinal
movement of said feed blade in alternate direc
tions, a disk mounted on said shaft, a pair of
bracket-engaging elements carried by said disk
corresponding approximately to the width of said
upstanding tongue, whereby said bracket will pre
vent oscillation of the rear end of said lever when
said bracket engages said upstanding tongue, a
arm on said bracket, an adjustment lug on said
arm, a cam wheel engaging said lever between the
forward and rear ends of said lever and adapted
to produce lateral oscillation of said lever, a hori
zontal rotating shaft located to-the rear of said
lever and bracket, crank means connected with
said shaft for producing longitudinal movement
and so arranged as to engage the end of said 20 of said feed blade in alternate directions, a pair
of bracket-engaging elements connected with said
bracket arm when said arm has been adjusted so
shaft and so arranged as to engage the end 'of said
as to extend beyond the rear end of said bracket
bracket arm when said arm has been adjusted so
and push said bracket to lowered position when
as to extend beyond the rear end of said bracket
ever said crank means has moved said blade to
the end of its longitudinal path in either direction, 25 and push said bracket to lowered position when
ever said'crank means has moved said blade to
whereby the pushing of said bracket to lowered
the end of its longitudinal path in either direc
position will cause greater lateral oscillation of
tion, whereby the pushing of said bracket to low;
the forward end of said lever and of said blade.
ered position will cause greater lateral oscilla
6. In a buttonhole attachment for a’ sewing
machine, a feed blade mounted for longitudinal 30 tion of the forward end of said lever and of said
and lateral movement, a slot extending longitudi
nally in said feed blade, a stitch control lever lo
cated above said feed blade,a downwardly ex
tending tongue on the forward end of said lever
blade, and means for manually locking said arm
and said bracket permanently in lowered position,
JAMES HICKEY.
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