BUTTON HOLE ATTACHMENT FOR SEWING MACHINES
Year: 1884

page_text: COMPLETE SPECIFICATION.
I, HERBERT JOHN ALLISON, of the firm of Allison Brothers, Patent Agents, of
Chancery Lane, in the County of Middlesex, do hereby declare the nature of my
invention for "BUTTON HOLE ATTACHMENT FOR SEWING MACHINES" and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :—
The objects of this invention are to furnish a button-hole attachment for sewing
machines adapted to be applied to most of the sewing machines now in use without
material alteration in them, and designed for stitching button-holes or eyelets; to
regulate the speed of the form plate by automatically-operating mechanism; to
provide improved devices for operating the reciprocating plate; to provide an
improved device for barring the ends of a button-hole, and an improved device for
holding and guiding a cording thread or cord, and for assuring an even and
regular looped button hole stitch; and also to provide improved cloth clamps and
button hole form plates for such attachments as are respectively designed for light
or domestic work, and for heavy or manufacturing work.
The invention consists of a lever fulcrumed on the reciprocating foot and having
one end adapted to rest on the upper face of a form plate so that said lever shall
be operated by reason of the inequalities in the said face and the other end
adapted to make contact with suitable mechanism for throwing out of gear, at
intervals, the ratchet which transmits motion from the needle bar to the mechanism
that feeds or moves the form plate; and it further cousists of a gate adapted to
move vertically in a fixed frame and provided with suitable devices for inaking
connections between the reciprocator lever and the reciprocating lever and further
of a reciprocating lever of novel construction.
And it consists further of an improved device embracing an eccentric lever and
arm and an adjusting lever for arresting the feed of the form plate and the
mechanism for transmitting motion thereto, for the purpose of barring the button
hole.
And it consists further of a revolving thread holder, guide and presser foot,
consisting of a vertically adjustable roller arranged on the front of the device and
designed for holding and guiding a thread or cord for cording a button hole when
desired, and for pressing down the edge of a button-hole to the end that an even
and regular loop stitch may be made.
And it further consists of a combined cloth clamp and permanently fixed form
plate of novel design, for heavy or manufacturing work; and of a cloth clamp and

page_text: form plate of novel design, for light or domestic work-the light form plates being
adapted to be readily substituted or changed one for another on the light cloth
clamp.
And the invention embraces other novel devices or mechanisms designed to
make the attachment correct and accurate in all its operations. All of which will
be hereinafter fully described.
Reference is to be had to the accompanying drawings, forming part of the
specification, in which similar letters of reference indicate corresponding parts in
all the figures.
Figure 1 is a perspective view of my improved button hole attachment fixed on
the head of a sewing machine.
Figure 2 is a side elevation of the attachment.
Figure 3 is a plan of the same.
Figure 4 is an enlarged side elevation of the same with parts removed to exhibit.
other parts.
Figure 5 is an enlarged plan of the same with parts removed to exhibit other
parts.
Figure 6 is a sectional front end elevation of the same on line x, x, Figure 2.
Figure 7 is a sectional rear end elevation of the same on line y, y. figure 2.
Figure 8 is a cross sectional elevation, with parts removed to exhibit other
parts, showing one position of the mechanism for automatically regulating the
speed of the form plate.
Figure 9 is a cross sectional elevation, with parts removed to exhibit other parts,
showing another position of the mechanism for automatically regulating the speed
of the form plate.
Figure 10 is a plan of the obverse face of the reciprocating lever and
attachments.
Figure 11 is a plan of the yoke attached to the reciprocating plate and designed
for transmitting motion to the same.
Figure 12 18 an enlarged end elevation of the reciprocating lever and
attachments.
Figure 13 is an enlarged cross section on line z, z,. Figure 2 of the vertically
reciprocating slide or gate with its frame forming the connection between the
reciprocator lever and the reciprocating lever.
Figure 14 is a partly sectional reversed plan on line x1, x¹, of the cloth clamp
designed for heavy or manufacturing work."
Figure 15 is a plan of the same.
Figure 16 is a longitudinal elevation of the same.
Figure 17 is a longitudinal sectional elevation of the button-hole form plate
designed for heavy work.
Figure 18 is an enlarged side elevation of the revolving cord guide and presser
foot in position.
Figure. 19 is an enlarged front elevation of the same in position..
Figure 20 is a plan of the ratchet engaging in the crown ratchet wheel.
Figure 21 is an edge view of the same.
Figure 22 is a plan of cloth clamp closed, and button hole form plate in position
thereon, designed for light or domestic work.
Figure 23 is a plan of cloth clamp, closed, with form plate removed.
Figure 24 is a plan of the said cloth clamp laid open.
Figure 25 is a side elevation of the same partly opened.
Figure 26 is a cross section of the upper leaf of the light cloth clamp on line
y¹, y¹, figure 23.
Figure 27 is a plan of a light button-hole form plate for straight button-holes.
Figure 28 is an obverse plan of the same.
Figure 29 is an obverse plan of a light eyelet-ended button-hole form plate.
Figure 30 is a cross section on line 2¹, z¹, figure 29.
Figure 31 is a longitudinal sectional elevation on line ³, x³, figure 29.

page_text: Figure 33 are side elevations of the same.
Figure 34 are cross sections of the same.
Figure 35 shows the reverse of the eccentric lever used when barring button-
holes.
Figure 36 is an enlarged sectional elevation on line x³, x³, figure 10.
Figure 37 is a plan of the screw stud shown in figure 36.
Figure 38 is a plan of the brace holding the attachment to sewing machine.
In the drawings A represents the head of a sewing machine; B, the presser foot
bar with presser foot removed; and B¹ the lever by which it is elevated and
depressed. C represents the needle bar and C¹ the ordinary thread guide.
The presser foot bar B has in its lower end a slot a by means of which and a
screw (not shown) the ordinary presser foot is secured thereto.
The carrier plate D, of my improved attachment has for part of its length, one
side or edge turned up at right angles, and terminating in a vertically slotted
boss b in the center of which is rigidly fixed a tongue b¹, and in an overhanging
projection from this side of the plate D is a thumb screw b².
The button-hole attachment is held to the sewing machine by the engagement
of tongue b' in the slot a-the end of the presser foot bar entering the slotted
boss b-and by means of a brace b³ whose eyed end is held on the presser foot bar
by a set screw b' and whose slotted end straddles the shank of the screw b², which
is then turned tightly down.
Hence it will be seen that the attachment may be elevated and depressed by
the presser foot bar of the machine.
The reciprocating foot E is held, so as to freely move, in the groovesc in the
under side of the carrier plate D, and the latter has several slots or openings made
in it for the upward projection of certain of the parts that are fixed on the
reciprocating foot, as hereinafter described.
Fixed upon the reciprocating foot E is a standard E¹, and on a horizontal
stud c extending outward therefrom, are set so as to move freely thereon a
peripherally cogged wheel E3 and a crown ratchet wheel E³ that are firmly held
together by screws or other suitable devices; and held on the same stud or axle c¹
by a nut is a bell-crank feed lever F, with one end slotted as shown at d and
having on the other end a lug d¹ in which is pivoted the dog or ratchet F1 that is
designed to engage in the teeth of said ratchet wheel E³, said ratchet F¹ being
held in contact with the wheel E³ by means of a spring d², that is fixed on the
lever F.
The reciprocating motion of the needle bar C is transmitted to the lever F by
means of an arm F" having one end firmly secured on the said needle bar by a
set screw d³ while the other end engages in the slot d of the said lever.
A brace d secured at one end by screw d to the standard E, extends upward
in contact with a side of the wheel E' and steadies it and the wheel E³ against
lateral motion.
Also projecting upward from the reciprocating foot E through a suitable slot in
the carrier plate is a standard E, and journaled in the standards E¹, E, is a
shaft f, having firmly fixed thereon pinions G, G³, the latter being held in place on
the outside of the standard E' by a screw nut f' as shown..
The pinion G¹ gears with the cogwheel E2, and the pinion G with the pinion G³
that is fixed on the worm shaft G which latter is journaled in standards E¹, E³,
and carries the worm G* that is designed to gear into the button hole form plate M
and transmit motion thereto.
On the front end of the reciprocating foot E is rigidly secured a forward
projecting plate H having an aperture g through which the needle is designed to
reciprocate when the machine is in operation, and about which is a depending
cylindrical lip g¹ that is designed to hold the button-hole form plate M in operative.

page_text: position and engaged with the worm Gʻ, and at the same time to serve as the
pivot about which said plate M shall turn.
.
From the rear end of the carrier plate D there rises a vertical standard or
frame K having a groove h for holding and guiding the gate K¹ which is provided
with a horizontal rod h¹ rigidly fixed in it and extending through and beyond
each face thereof. The outward end of this rod h¹ is designed to be engaged in
the closed slotted end of the reciprocator lever K that is pivoted on the
standard K and has its forward, open, slotted end engaged over the arm Fas
shown.
Adjustably secured by a screw h³ on the reciprocating foot E beneath a
corresponding and larger aperture ³ in the carrier plate D is a yoke h¹ designed
for the engagement with the mechanism adapted for moving the said foot—the
shank of said yoke being extended rearward through a suitable depression in the
carrier plate D.
The reciprocating lever L pivoted at one end on the carrier plate D, is a
flattened plate having a central longitudinal slot i, and on one end a boss i¹ from
the face of which protrude two stops or pins i, and on which is pivoted the
reciprocating latch L¹, provided with opposite lateral arms that are designed,
when the device is in operation, to alternately take against the stops that
thereby arrest the motion of the said latch.
A spring secured in the under face of the lever L has its free end bearing up
against the inferior point of the said latch L' for the purpose of holding the latter
temporarily at whichever angle it may be moved by the downward motion of the
rod h¹ when the latter is forced down alternately upon the inclined planes of the
head of the said latch L'
A screw stud k having its head engaged, so as to be movable, in the slot of the
yoke hand its shoulder in the slot of the lever L, with its threaded end projecting
up through said lever and provided with a thumb nut k¹ serves as the adjustable
connection between the lever L and the reciprocating foot E.
By loosening this nut the operator is enabled to move the stud k along the
slots of the yoke h' and lever L and thereby adjust, shorten or lengthen the throw
or reciprocation of the foot E, and consequently shorten or lengthen the bite of the
stitches, as will be bereinafter more fully set forth.
The button-hole form plate M designed for heavy or manufacturing work, such
as overcoats, cloaks, coats &c., has an open ended central slot whose inner end is
preferably eyelet-shaped and its beveled upper outer edges are toothed throughout
most of their length as shown at to correspond with the threads of the
worm G'
.
On each edge the series of teeth terminate at blank spaces 2 by which the
form plate is prolonged. These prolongations being designed to steady the said
form plate in position when the worm G' has ceased to move it, and while the
straight cross-bar of the button-hole is being formed, as hereinafter set forth.
Said form plate M is firmly secured on the upper leaf of the cloth clamp N―
over the longitudinal open slot therein-to secure the synchronous movement
of the two when the device is in operation.
For button-holes of different sizes in heavy work both form plates and cloth
clamps of suitable dimensions are designed to be provided and to be substituted at
will for those in use.
The cloth clamp N designed for heavy work is constructed of a flat plate or
leaf m of metal having a closed central slot m¹ of the shape of the button-hole
which is to be made. Over this leaf m and on one end thereof an open-slotted
plate or leaf m² is riveted by its under curved point so that said leaf m² shall be
held normally high enough for the insertion of the article to be operated upon
between it and the leaf m.
The slot in the leaf m³ corresponds in position with that of the leaf m and sharp
pins m³ project downward around its edges to penetrate the material about the
buttonhole and aid in holding it in position for the stitches.

page_text: On the inferior face of the leat m² is fixed a lug m² and beneath it on the upper
face of the leaf m is pivoted an eccentric lever m³, so that when the article to be
operated upon is inserted between the leaves m, m³, it may be immovably held in
position by turning the lever m³ into engagement with the lug m' as shown in
Figure 17 and thereby forcing and holding the leaf m² down with all necessary
pressure.
On side pieces me projecting upward from the leaf m is secured by screws or
otherwise, the upper leaf m7 having the open slot 3 corresponding in position with
the other slots in this clamp.
1
The cloth clamp O designed for light or domestic work-for household purposes-
consists of two thin plates of metal hinged together at one end, the lower plate n
having a slot n¹ and cloth holding pins n² projecting upwards from about the
edges thereof, while the upper plate n³ has a corresponding slot n' about which
are sockets n designed to receive the ends of the pins n when the clamp is
closed. On either side of the slot n' on the upper face of the plate n³ are fixed
metal strips n undercut on their outer edges as shown in Figure 26 and rearward
of the slot n is hinged in lugs n' a lever n one end of which provided with an
upward projecting stud n extends through a suitable slot n10 beneath the
plate n³ while the other end extends above it and rearward for the convenient
manipulation of the operator.
The button hole form plate O¹ designed for use with this clamp O may have an
opening of the usual form as shown in figures 27 and 28 or an eyelet ended
opening as shown in figures 22 and 29.
On its inferior side said form plate 01 has strips-o applied to engage with the
strips n of the cloth clamp; and said plate is provided with a hole o' corresponding
with the stud nº.
The form plate 0¹ is held in operative position on the cloth clamp by sliding it
over the strips n until the hole o¹ comes opposite the stud nº then the spring n
which is fastened on the cloth clamp and bears up against the arm of the lever n³-
forces the said stud n into the hole o¹.
Form plates O' of any desired dimensions or shapes may, it will be seen, be
interchanged, one for another, on this clamp O.
The cloth or button-hole stretcher P herein shown is a piece of metal of about
the size and shape of the opening in the button-hole form plate and of about the
same depth. About its upper edge it is preferably provided with a flange p to
hold it in position in the said form plate when in use. On its under side it is
furnished with a straight vertical blade pand-when designed for an eyelet-
ended button-hole-with a perpendicular stud p³ at one end of said blade.
A button-hole being cut by a suitable tool in the material to be worked on the
stretcher P is inserted from above in the button-hole form plate O₁ which is in
position on the clamp O, and said clamp is then opened and turned upside down,
the cut button-hole is then brought over the stretcher P and the inaterial pressed
down about the latter so that the said blade, and if used, the stud p² projects
through the said cut button-hole, thus bringing it into a precisely central position
in respect to the opening in the button-hole form plate; then the clamp O is closed
with the effect of firmly gripping the material to be worked on so that it will not
be distorted or stretched at the parts about the button-hole during the operation
of stitching the said buttonhole.
The stretcher P is then pushed out and the clamp reversed and placed in position
in the button-hole attachment.
In the ordinary mechanical stitching of a button-hole after the hole has been
cut in the fabric or material, it has been found difficult if not impossible, to bring
or form the loops of the stitches evenly along the edges of the button-holes,
because of the frequent lifting or pulling up of the edges by the upward movement
of the needle; hence the importance of having with a button-hole attachment
machine, a device for holding down the edges of the material about the button-hole
while the latter is being stitched.

page_text: The device I apply for this purpose may be termed a thread holder, guide ana
presser foot and it consists of a grooved roller q capable of revolving on a horizontal
axle in the lower end of a finger q₁ which is vertically movable in guides q², fixed
within the aperture g¹ of the plate H, the upper end of said finger being held by
a pin q³ in the slot q* of a lever q' that is pivoted in a post q which is fixed on
the extreme end of the plate H and a spring 97, also fixed on said plate bears
upward against the outer end of said lever and thus keeps the roller q down, as
shown in figure 2 to rest as a presser foot on the material to be operated upon.
When it is desired to cord a button-hole the cord, as represented at 1, Figures 18
and 19, is passed down through the perforated plate q8 and in the groove of the
roller q, as shown, and said cord being thus held in position along the edge of the
button-hole the button-hole stitches are formed over it.
In mechanically stitching a button-hole it is indispensable that the form plate
should be moved at different rates of speed when stitches are being made along the
edge and along the ends of the button-holes,-indispensable to the perfect regularity
of the stitches that there be some device for automatically adjusting the speed of
the form plate or its feeding or moving mechanism.
To this end the button-hole form plates are grooved on their upper faces at their.
closed ends as shown at r¹ and journaled in a horizontal bearing r² which is fixed
on an edge of the reciprocating foot E, is the adjusting-lever Q one end of which,
extending forward, is provided with a depending stud designed to rest on the
face of the form plate in use, while the other end of said lever is turned upward
towards and nearly in contact with the ratchet F on the lower extremity of which
is adjustably held by a screw a slotted-finger Q1, having a downward projecting
point between which and the wheel E³ the up-reaching end of the lever Q.
extends.
The extremity of this end of the said lever Q is somewhat flattened at 7³ as
shown in figures 8 and 9, and just below this flattened end the said lever swells
outward to form a shoulder 70. When the button-hole attachment is in operation
the feed lever F is reciprocated by the motion of the needle bar, as above set forth,
and the ratchet F1 when in gear with the ratchet wheel E³, gives motion to the
same, which motion is transmitted through wheel E* and pinions G, G1, G2, to the
worm G* and thereby to the form plate.
The ratchet F¹ is normally held in gear with the wheel E³ by the spring d², as
shown, and consequently by the upward movement of the lever F the rear end of
the ratchet F1 is forced down and the wheel E³, worm G and intermediate
mechanism are made to partially revolve and to transmit the motion to the form
plate, which is thereby moved a proper distance for the next stitch that will be
made on the downward reciprocation of the needle bar.
When the eyelet or rounded end of a button hole is to be stitched it is requisite
that the form plate should be moved rapidly in order that the stitches should be
formed at suitable distances apart, and not overlap each other, hence the ratchet F¹
is held in contact with the wheel E³ throughout the whole of the upward movement
of the lever F-the stud 3 resting all this time in the groove in the end of the
form plate, so that the upper end of the adjusting lever is not in contact with
the slotted finger Q¹.
But when the sides of a button-hole are to be stitched the form plate must be
moved more slowly or through shorter distances at each upward movement of the
needle bar, in order that the stitches may not be too far apart and at such times
the stud rests on the ungrooved portions of the face of the form plate, whereby
the upreaching end of the lever Q is forced outward as shown in figure 8, and then
when the lever F makes an upward movement the ratchet F¹ keeps engaged with
the wheel E³ for only a portion of the stroke or movement and consequently
transmits comparatively little motion to the form plate; for when, under these
conditions the lever F has made part of its stroke the finger Q' makes contact
with the shoulder 76 of the lever Qand the toothed end of the ratchet F' is thereby

page_text: forced outward out of gear with the wheel which latter then ceases to move or
transmit motion.
The finger Q' can be adjusted on the ratchet F¹ by means of the screw so as
to lengthen or shorten its period of contact with the lever Q, whereby the distance
through which the form plate is fed or moved at each reciprocation of the needle
bar is increased or diminished.
The grooves r in the form plate are so formed or graduated and the ungrooved
portions of the face of the form plate are so relatively proportioned, that the
stitches made about the button-hole are as even and regular as can be made by
hand.
A special device for the straight barring of the end of a button-hole; and used
only in combination with the open-ended form plate shown in Figures 15, 16, 17,
is seen at Figures 2, 3, 4 and 5.
This device consists of a flat plate s having is upper end slotted, as shown at 8¹,
and provided with vertical stops 82, and pivotted eccentrically on the plate s
between the stops & by a screw or pivot t¹ is a levert provided with a circular
boss projecting downward from its inferior face.
This barring device S is adjustable and firmly held by a screw h² passing through
the slot 8 on the shank of the yoke h* so that it may be adjusted to correspond
with the length or the reciprocation of the foot E; the free end of the said lever t
being extended rearward for the convenience of the operator.
To the opposite end of the lever t is firmly and adjustably secured by screw t³
an arm T that extends forward between the up-reaching arm of the adjustable
lever Q and the wheel E3-the end of the arm T which is held to the lever t being
slotted as shown at t' to permit of adjustment. to insure suitable pressure of the
arm T outward against the lever Q.
When the open ended form plate is used it is desirable, after the sides and eyelet
end have been stitched, to stitch a straight bar across the open end of the button-
hole, hence when this point is reached in the operation the operator moves the
outer end of the lever t laterally to the right, thus bringing the projecting edge of
the boss t² against the forward stop 8 that serves as a fulcrum and lock therefor,
so that the extremity of the arm T shall make and hold contact with the
upreaching arm of the lever Q and force and hold it and the ratchet F¹ outward,
thus ungearing the latter from the wheel E³ so that the said wheel ceases to transmit
motion to the worin G' and the form plate.
At the same time the reciprocating foot E and its connections continue to be
reciprocated through the mechanism of the reciprocator lever K² so that the
form plate and cloth clamp together with the material being operated on are
reciprocated back and forth under the threaded needle so that the cross-bar is
made.
When the device is in operation the upward motion of the needle bar elevates,
through the medium of the arm T, the forward end and depresses the rear end of
the reciprocator lever K2 thereby forcing down the gate K¹ and rod h¹ so that the
inner end of the latter engaging against one or the other of the inclined planes
ho, ho, of the latch L' forces the said latch backward or forward, as the case may
be and with it and through the medium of the reciprocating lever L the
reciprocating foot E and its attachments.
For instance when the rod h¹ is forced down on the inclined plane h³ the head
of the latch L¹ is thereby inclined rearward and the reciprocating foot E pushed
forward, then on the next downward notion of the needle bar, the rear end of the
lever K and the gate and rod K¹, h³, are raised-the latter clear of the latch L¹-
and on the next upward movement of the needle bar the rod h¹ is forced down on
the plane of the latch L'; with the effect of reciprocating the foot E, rearward,
and thus the foot E and its attachments are reciprocated by and in correspondence
with the reciprocation of the needle bar.
The needle V being fixed in place and threaded, and the device being in position
the sewing machine is set in operation in the usual manuer, and through the

page_text: mechanism hereinbefore described the form plate and cloth clamp, carrying the
material to be operated upon, are together moved, revolved and reciprocated
beneath the needle as the latter reciprocates up and down in making the
stitches.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is:
1. A button-hole attachment to sewing machines containing the following
elements; a carrier plate for supporting and guiding a reciprocating foot, a
reciprocating foot supporting the mechanism for moving the button-hole form plate
and cloth clamp; a worm for transmitting motion to the button-hole form plate;
means for reciprocating the reciprocating foot and regulating the bite of the
stitches, comprising a reciprocator lever operated by the needle bar, a vertically
moving gate provided with a horizontal rod, a latch having oppositely inclined
planes, and an adjustable reciprocating lever; a ratchet adapted to be automatically
thrown out of gear with the wheel through which motion is transmitted to revolve
the form plate; a lever operated by the moving form plate to regulate the speed
of the latter and the distance between the stitches. A device embracing an
eccentric lever and an arm and an adjusting lever for stopping the feed of the form
plate and the mechanism for transmitting motion thereto for the purpose of barring
a button-hole; a combined thread holder, guide and revolving presser foot; a
combined cloth clamp and permanently fixed, open-ended button-hole form plate;
and a button-hole form plate having irregularities in its face for automatically
operating a speed-regulating lever, all combined and operating substantially as
herein shown and described.
2. In the button-hole attachment to sewing machines the combination with the
carrier plate provided with grooved frame K and reciprocating arm K² of gate K'
provided with rod h¹, reciprocating foot E, yoke h', adjustable reciprocator lever L,
stud k, nut k¹, spring and latch L', all constructed, arranged and operated
substantially as set forth.
3. In a button-hole attachment to sewing machines as a means for transmitting
motion from the needle bar operated lever to the mechanisin operating the
reciprocating foot, the vertically movable gate K¹ provided with suitable attach-
ment substantially as herein shown and described.
4. In a button-hole attachment to sewing machines the combination with the
ratchet wheel designed to transmit motion through suitable mechanism to the
form plate, of a lever adapted to be connected with the needle bar and provided
with ratchet and ratchet spring fixed thereon, substantially as described, said
ratchet being normally held by the spring in gear with the ratchet wheel as set
forth.
5. In a button-hole attachment to a sewing machine, as a means for holding
down the edges of a button-hole that is being stitched, the combination with the
said attachment of a roller q and support g' arranged and operating substantially
as herein shown and described.
6. In a button-hole attachment to a sewing machine, as a means for holding and
guiding a thread or cord for cording a button-hole the combination of a grooved
roller g, support q', guides 92 and perforated plate q* all arranged substantially as
herein shown and described.
7. In a button-hole attachment to sewing machines as a means for arresting the
feed of the form plate, a lever having one end arranged and adapted to rest on
the face of the form plate, and the other end adapted and arranged to break the
connection between the needle bar and the form plate, substantially as herein
shown and described.
8. In a button-hole attachment to sewing machines a form plate provided
with alternate face depression and elevations substantially as and for the purpose
set forth.
9. In a button-hole attachment to sewing machines the combination with a cloth

page_text: clamp constructed with slotted leaves m, m2, m7, pins m³, lug m' and eccentrio,
lever m of an open and toothed form plate M permanently fixed thereto,
substantially as herein shown and described.
10. In a button-hole attachment to sewing machines, means substantially as
herein shown and described, for arresting the feed of the form plate when barring
the end of a button-hole.
11. In a button-hole attachment to sewing machines the combination with the
ratchet, transmitting motion from the needle bar to the mechanism for moving the
form plate, of an adjustable finger as and for the purposes set forth.
12. In a button-hole attachment to sewing machines the combination with a
button-hole form plate and cloth clamp of the cloth stretcher P constructed
substantially as herein shown and described.
13. In a button-hole attachment to sewing machines as a means for centreing a
button-hole form plate in respect to the button-hole to be worked, the cloth
stretcher P provided with depending vertical blade substantially as herein shown
and described.
14. In a button-hole attachment to a sewing machine, provided with a
reciprocating foot and a form plate, as a means for turning the form plate the
combination with said form plate of a worm supported on the reciprocating
foot and actuated by suitable mechanism, substantially as heroin' shown and
described.