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Патент USA US2131012

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Sept. 20, 1938.
M. McCANN
2,131,012
BUTTON SEWING MACHINE
Filed April 3, 1936
2 Sheets-Sheet l
Sept. 20, 1938.
M, McCANN
2,131,012
BUTTON SEWING MACHINE
Filed April 3, 1936
2 Sheets-Sheet 2
_ Patented Sept. 20,1938
2,131,012
‘UNITED STATES
PATENT OFFICE
2.131.012
BUTTON SEWING MACHINE
Michael McCann, Ozone Park, N. Y., assignor to
The Singer Manufacturing Company, Eliza
beth, N. 1., a corporation of ‘New Jersey
Application April 3, 1936, Serial No. 72,460
12 Claims.
This invention relates to button-clamps for but
ton sewing machines, and it has as its primary
object to provide an improved clamp which will
more securelyhold shank buttons than clamps
5 heretofore available; which is adjustable to ac
commodate buttons of various types and sizes;
which is self-locking and therefore cannot be
(Cl. 112-114)
. .
a button-supporting foot, adapted to receive the
wire shank of a so-called military button, oper
ating in conjunction with a work-support de
signed so to hold the work that the button is
secured by blind stitches.
5
Fig. 3 is a plan view of the parts shown in Fig. 2,
omitting the needle-bar, needle, and the, lower
opened inadvertently by accidental movement of
the button; and which readily may be used in
10 conjunction with various types of work-supports,
portion of the bracket-arm head.
Fig.4 is a view similar to Fig. 2 showing the
improved button-clamp ?tted with a button-sup- 10
whereby the buttons may be attached by either
through-and-through or blind stitches and either
with or without stay buttons.
These objects have been, attained by the pro
" vision of a button-clamp having a supporting
arm, a plurality of interchangeable button-sup
porting foot designed to receive a leather shank
button, with a button-holding am having a cup-
porting feet adapted selectively to be secured
thereto, each foot having a recess designed to re
ceive a diflerentltype of button-shank, and a
20 two part button-holding lever pivotally mounted
on said supporting‘arm and adapted to engage a
button to hold the shank thereof in the recess in
the supporting foot. _ One part of the button
clamping lever is adapted to have the other part
25 movably mounted thereon. The latter part may
comprise any one of a plurality of interchangeable
button-holding arms each provided with a cup
like button-engaging portion, which portions vary
like button-engaging portion designed to receive
a smaller button, and with the world-plate of the
machine fitted with a work-support adapted to 15
hold a stay button, whereby the button and stay
button are attached to the work simultaneously
by through-and-through stitches.
Fig. 5 is a view similar to Fig. 4 but showing/‘the
button-clamp ?tted with a button-supporting foot 20
designed to receive a self-shank button, with a
button-holding arm similar to that shown in Fig.
2, and with the machine fitted with still another
form of work-support adapted for blind stitching.
Fig. 6 is a diagrammatic view illustrating the 25
self-locking feature of the present improved
button-clamp.
'
'
’
Referring more speci?cally to the drawings,
in shape and size to conform to the shape and size
30 of different sizes and types of buttons to be held.
the invention is disclosed as applied to a button
Due to the adjustability of the button-holding
portion of the lever and the shapes and sizes of
the various cup-like button-engaging portions,
multiple point contact, full surface contact or
35 two line contact, at diametrically opposite sides
of the button, may be obtained between the but
ciprocating and laterally vibrating needle-bar 6,
arm head 5, within which is supported a re
ton and the arms, as distinguished from the single
carrying a needle ‘I. The bed is provided with
a forwardly extending work-supporting horn 2‘ 85
within which is mounted lower stitch-forming
mechanism which cooperates with the needle in
point contact and single line contact of prior
the formation of stitches. Inasmuch as the means
button-clamps. Thus the present clamp more se
40 curely holds the buttons and more effectively pre
vents movement thereof in the button-clamp.
The self-locking feature of the clamp is ob
tained by the speci?c connection between the
button-clamp lever and its actuating lever as
45 hereinafter will be explained.
Other objects and advantages will be in part
indicated in the following description and in part
rendered apparent therefrom in connection with
50
sewing machine comprising a supporting base I, 30
a bed 2, standard I, bracket-arm l, and bracket
the annexed drawings in which:
Figure 1 is a side elevation of a Singer Class 1'15
for actuating the needle and the construction ‘of,
and means for actuating the lower stitch-forming 40
mechanism, may be conventional and form no
part of the present invention, illustration and de
scription thereof are deemed unnecessary.
The improved button-clamp comprises a sup
porting arm I hinged to a portion of the sewing 45 )
machine, as for example, by its attachment to‘
an angle piece 9, pivoted, at it, to a bracket Ii
secured to the standard 3. At its forward end
the arm I has a downturned portion 8" provided
with a seat. I“ adapted to receive anyone of a. .50
button sewing machine embodying the present
plurality of interchangeable button-supporting
invention.
feet such, for example, as-the feet i2, i3 and I4
shown in Figs. 2, 4 and 5, adapted to hold, re
spectively, wire-shank buttons 1:, leather-shank
7
Fig. 2 is an enlarged, left end elevation of a
portion of the machine illustrated in Fig. 1, show
65 ing the present improved button-clamp fitted with
buttons 1! and self-shank buttons 2.
v 55
.2
2,181,012
The material m to which the buttons are to be
secured, may be held upon any suitable form of
into engagement with the lower wall 4‘ of the
bracket-arm (see Figs. 1 and 4) .
Continued up
support located beneath the button-supporting ward .movement of the clamp causes the lever 24
feet, such, for example,'as the work-supporting to be swung downwardly, relative to the arm 8,
blocks l5 and I6 removably and interchangeably in opposition to the spring 28. During this move
mounted upon pins l1 and I8 projecting upwardly ment, the ?nger 21' is, in e?ect, moved down
from awork-platei! securedupon the portion wardly and acts upon the wall 2| b of the slot 2|“,
therebyvcausing the button-clamping lever 2|, 20
2a of the bedv 2., The block I5 is adapted pri
‘marily "for blind-stitch sewing, while the block to be swung clockwise,‘ about the pivot 22, to the
10 I6 is adapted for through-and-throughstitching position indicated in dotted lines in Fig. 4. This
with a stay-button. If desired, blocks similar to releases the button so that it may be removed
the block IE but without the stay-button cavitys wfrom the button-clamp and replaced by another
may be‘ employed. Another form ,of work-sup
port, which may be used’ in conjunction with the
present improved button-clamp, is ‘shown in Fig.
15
5. This work-support is similar to that'shown in’
U. S. patent to Lyons, No, 1,654,593,.Jan. 3, 1928.
Referring to Figs. 1, 2 and 3, it will be seen
that cooperating with the foot l2, tohold the
20 buttons, is an arm 20',.provided¢wi_th a cup-like
‘button-engaging head 205 adapted to engage the
button xto hold the ,shankr'thereof in a suit
ableaperture formed in thevi‘oot. .Asshown in
Fig. 2, this head 20‘ provides twobutton-engaging
25 portions,» 20b and 28° which contact with. the
button at ,'opposite sides of the center thereof,
thereby holding the, shank of thebutton in the
.foot 12 and vpreventing tipping‘ of the button.
, Fig. 3 illustratesathev line contact between the
30 portion 20b and the headof thebutton. Asimi
lar line contact is provided by theportion 20°. '
, _The arm .20 comprises one part of a two-part
button-clamping lever which is adjustably mount
,ed,>for'horizontal movement, 'onjthe other part
2|, pivotally mounted upon a shoulder screw 22.
10
button for a subsequent sewing operation. As the
clamp is lowered, the-spring 28 causes the lever
24 to be swung upwardly, relative to the arm 8, 15
whereupon the end '2‘! acts upon the wall 2| '1 of
theslot 2|c andthereby-turns the lever-2|, 20
counter7clockwise to bring the‘ portion 2|]a into
contact with the button.
>
>
,- Fig. 6 illustrates diagrammatically the means 20
provided for preventing opening of the clamp by
movement of the button. In that ?gure the force
exerted by the button on the clamping arm 20
is represented by the arrow 1‘. This force tends
to turn the lever 20, 2| clockwiseabout the pivot 25
22. Thus the contact point of the wall 2|’- on
‘the ?nger 21 is-moved in‘ an are q and exerts a
force on. the ?nger, which force is represented
by the line 0 perpendicular-to the line i inter- '
secting the axis of the pivot 22 and said contact 30
point. The force 0 is the componentof a verti
cally acting force a and a horizontally acting force
17. It will readily be perceivedthat if either the
force a or the force I) is resisted the member 20, 2|
cannot'be moved. As shown by Fig. 6 the force I) 35
This screw issecured in the downtumed portion -i’s"resi'ste'd by a counterforce, represented by the
8“ of the clamp-supporting arm 8 and has -i
forward end, projecting through a slot 2|'|cl form
in the horizontal portion of the arm 28. A nut
arrowd due to the fact'that the stationary wall 8d
of the slot 80 is in contact with the side of the
?nger
21.
'
-
'
'
-
'
23 threaded on the screw 22 serves to clamp the ' From the foregoing it will be apparent that this
arm ;20_ to the lever 2| in any desired position of - clamp is selfelocking against movement initiated
by the button, while the button-clamping arm is
' adjustment. ‘ The arm 20 is adjustable length
.wise of the lever 2| to compensate for various 4 free to be moved by actuation of the lever 24.
Fig. 4 shows an arm 208 removably secured to
thicknesses of the button heads. Thus, regard
less of the thickness of the heads of the buttons the lever 2| in place of the arm 20 of Fig. 2. This 45
to be attached, full contact may be maintained arm has acup-like portion 20“, which is smaller
therewith at'opposite sides .of‘ the center of the
button.
.
_
.
than the portion 20“ 'of the arm 20, and which is ,
designed to hold smaller buttons.,such for ex
ample as the button 1/.
Fig; 5 shows the arm 28 adjusted inwardly on 60
and
the
‘arm
20
carried
thereby,
in
a
clockwise
'
50
the leverv 2| to cause the portion 20B'thereof to
direction (asseen in Fig.2) . to open the button
Means is provided for swinging the lever 2|,
enga'ge,,by two line contact at diametrically op
tion to close the clamp afterlthebutton has'been - posite sides of the center of the button, a but
clamp, and tolswing them inthe opposite, direc
inserted;v This, means comprises j an, actuating
,lever 24¢,pivotally mounted vzit-25 'toa stud 26
tonhaving a relatively thin head..
_
Having thus set forth the nature of the in 65
‘carried. by-the supporting arm 8. The forward - vention, what I claim herein is:
‘ end of this lever isi’ormed as a cylindrical ?nger '
’
1. A button-clamp for shank-type buttons
21 which projectsthrough a slot 8‘7 inthe portion comprising a supporting arm, a button-support
Bland ?ts between the walls 2|‘i ‘and 2|h of an ing 'foot carried thereby and provided with a
‘inclined slot 2|c formed in a portion 2|‘l of the button-shank receiving aperture, a button-hold
65
lever ‘ 2|. The lever“ is normally maintained
in the position shown in Figs. 1 and 2 by the
ing lever pivotally mounted on said supporting
action of‘ a coil spring 28 located between the
upper surface of the arm 8 and the head 28- of a
tubular nut 29 threaded upon the‘ upper end of
a rod 38 ‘connected to the lever 24. .The arm 8
and the parts carried thereby ‘are normally held
ton'to hold the shank thereof in said aperture,
depressed by ‘the ' action of “a spring-pressed
plunger 3| as shown in U. 8., patent to Lyons,
70 No_.1,583,062,. May 4, '1926, but ‘may be swung
vupwardly about the pivot ||| by suitable treadle
actuatedmeans designated generally asit. After
‘the button has been attached, initial upward
movement of the button-clamp'breaks the thread
75 (as is well understood) and brings the head 29'
60
arm and adapted to engage the head of the but—
and means to adjust a portion of said button
holding lever bodily relative to said supporting as
foot to compensate for variations in thickness of
the button-heads.
,
.
.
_ 2. A button-clamp 'for shank-type buttons
vcomprising a supporting member, a, button-sup
port provided thereby and located at one face of 70
the button, a button-holding element carried by
said supporting member and'adapted to engage
the other face of a button to maintain the .but
ton in av substantiallyvertical position and in
contact with said button-support, and means to 75
3
effect a relative bodilyadiustment between said
button-holding element and said button-support
transverse to a face of the button to provide
uniform contact between the button and said
element regardless of the thickness of the button.
3. A button-clamp for shank-type buttons
comprising a supporting arm, a button-support
provided thereby, and a two~part button-holding
member pivotally mounted on said supporting
10 arm andadapted to engage the head of the but
ton to hold the shank thereof in contact with
said button-support, one part of said button
holding member being movable relative to the
other part to compensate for variations in the
15 button-heads.
4. A button-clamp for shank-type buttons
comprising a supporting member, a button-sup
porting foot carried thereby and provided with
a button-shank receiving aperture, a two-part
20 button-holding lever pivotally mounted on said
supporting arm, and spring-actuated means nor
mally urging said lever into contact with the
head of the button to hold the shank thereof in
said aperture, one part of said button-holding
lever being movable relative to the other part to
maintain uniform contact between said lever
and the button regardless of the thickness of
the button-head.
5. A button-clamp for shank-type .buttons
30 comprising a supporting arm, a button-support
ing foot carried thereby and provided with a
button-shank receiving aperture, a button-hold
ing lever pivotally‘ mounted on said supporting
arm, and a cup-like button-engaging portion
carried by said lever adapted to engage the head
of the button at opposite sides of the center
thereof to hold the shank of the button in said
aperture.
6. A button-clamp for shank-type buttons
40 comprising a supporting member providing a
button-support having a button-shank receiving
aperture, a two-part button-holding element
mounted on said member and including a but
ton-engaging portion adapted to contact with
, buttons at opposite sides of the center-thereof
to hold the button-shanks in said receiving aper
ture, one part of said button-holding element be
ing movable relative to the other part to maintain
uniform contact with the button regardless of
variations in the button-heads.
-
'7. In a sewing machine-having a frame and a
arm and provided with a button-shank receiving
aperture, 9. button-holding lever pivotally
mounted on said supporting arm, and having an
inclined slot therein, means including an actu
ating lever pivoted to said arm and having a
portion within said slot to swing said button
holding lever in one direction into contact with
a button to hold the shank thereof in the aper
ture in said foot, means actuated by the tilting
movement of said button-clamp to swing said .10
lever in the opposite direction to release said
button, and means to adjust the position of said
button-holding lever bodily relative to said sup
porting-foot to compensate for variations in the
thickness of buttons.
9. A button-clamp comprising a pivotally
mounted supporting arm, means to raise said
arm, a button-supporting foot carried thereby, a
button-holding lever carried by said supporting
arm and cooperating with said foot to hold a 20
button, means actuated by the upward movement
of said supporting arm to swing said button-hold
ing arm out of contact with the button, and
means to lock said-button-holding arm against
movement under the in?uence of the button.
25
10. A button-clamp comprising a supporting
arm provided with avertically arranged slot, 9.
button-supporting foot carried by said arm, a
button-holding lever carried ‘by said supporting
arm and cooperating with said foot to hold a .
button, said lever being provided with an in
clined slot a portion of which is aligned with
the slot in said supporting arm, an actuating
lever piyotally mounted on said supporting arm
and having a ?nger projecting through and en
gaging the walls of said slots, means to move said
lever in one direction to cause said ?nger to act
upon one of the walls of said inclined slot to
swing said button-holding lever into engagement
with a button in said supporting foot, and means 40
to move said lever in the opposite direction to
cause said ?nger to swing said button-holding
lever out of engagement with said button, said
slots and ?nger being so constructed and ar
ranged as to lock said button-holding lever 45
against movement under the in?uence of said
button.
11. A button-clamp comprising a supporting
member, a button-support carried thereby, a
' button-holding member carried by said support
ing member and cooperating with said button
50
work-plate, a button-clamp pivoted to said frame,
support to hold a button, means to ‘move said
means carried by said frame to tilt said button
button-holding member into contact. with the
clamp about its pivot, said button-clamp com
prising a supporting arm, a button-supporting
foot secured to said arm and provided with a
button-shank receiving aperture, a work-sup
port carried by said work-plate beneath said foot,
button, and means to lock said button-holding
member against movement under the in?uence of 65
the button.
.
12. A button-clamp comprising a supporting
member, a button-support carried thereby, a two
part button-holding lever carried by said sup
porting member and cooperating with said but 60
a button-holding arm pivotally mounted on said
60 supporting arm, means to ‘swing said arm into
contact with a button to hold the shank thereof
in the aperture in said foot, and means to ad
ton-support to hold a button, means to move
said button-holding lever into contact with the
just the position of said button-holding arm ' button, means to lock said button-holding lever
bodily relative to said supporting arm to com
65 pensate for variations in the thickness of but
tons.
8. In a sewing machine having a frame, a but
ton-clamp pivoted to said frame, means carried
by said frame to tilt said button-clamp about its
70 pivot, said button-clamp comprising a support
ing arm, a button-supporting foot secured to said
against movement under the influence of the
button, and means to adjust one part of said
button-holding lever relative to the other part
and to said button-holder to compensate for
variations in thickness of buttons to be held in
said button-clamp.
MICHAEL McCANN.
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