IMPROVEMENTS IN SEWING MACHINES FOR MAKING BUTTON-HOLES
Year: 1881

page_text: LETTERS PATENT to James Hunt, of 58, Mann Street, Walworth, London, in
the County of Surrey, Mechanical Engineer, and Joseph Sinclair Fairfax, of
2, Laurence Pountney Hill, London, in the County of Middlesex, Consulting
Engineer, for an Invention of "IMPROVEMENTS IN SEWING MACHINES FOR
MAKING BUTTON-HOLES."
PROVISIONAL SPECIFICATION left by the said James Hunt and Joseph
Sinclair Fairfax at the Office of the Commissioners of Patents on the 20th
November 1881.
JAMES HUNT, of 58, Mann Street, Walworth, London, in the County of
Surrey, Mechanical Engineer, and JOSEPH SINCLAIR FAIRFAX, of 2, Laurence
Pountney Hill, London, in the County of Middlesex, Consulting Engineer.
"IMPROVEMENTS IN SEWING MACHINES FOR MAKING BUTTON-HOLES."
The object of this Invention is to make button-holes in a more perfect manner
than heretofore, and to give the operator of the machine complete control over the
character of the work done upon it, so that after adjustment for a particular class
of button hole the movements of the machine are entirely automatic, motion only
being given to the main shaft in any well known way.
The machine is capable of adjustment for the purpose of making the button hole
of any length that may be required, any width, any number of stitches for the
bars; and the length of the bars may also be regulated to that required, thus
stretching each side beyond the width of button hole itself, consequently making a
stronger, neater, and more durable hole than is now made by the existing class of
machines.
On motion being given to the main shaft of the machine by the hand wheel,
treade, or other convenient manner, three distinct movements are given to the
cloth plate, one being a traversing motion at right angles to the front of the
machine by which the stitch on the sides of the button hole is made; a second is
similar in character, and takes place at the ends of the holes, but the traverse is

page_text: usually almost double the length of the first, and this forms the bars of the hole;
and the third motion is in the direction of the length of the machine, and
constitutes the feed which may be regulated so as to form any length of button
hole.
The work is clamped upon the cloth plate or table to which the above motions
are given by means of a compound pressure clamp or foot, in which is an opening
or eye of a size fully equal to the largest hole required to be worked. The clamp
consists of a spring beam raised or lowered according to the pressure exerted upon
it by an arm deflected by an eccentric ended lever, the arm being raised through
the action of a released spring. An adjusting screw allows for the varying thickness
of work to be done; this is attached to the cloth plate.
The needle bar and shuttle are driven from a double cam fastened behind the
hand wheel in the usual manner; upon this cam or main shaft and another parallel
shaft are mounted the requisite cams for producing the motions above described
through levers or connecting arms. A sliding double block or suitable cam is also
provided for regulating the feed or number of stitches on sides and bars of button
hole, and is connected by a suitable arm to a friction feed cam.
A screw can or driving shaft actuates a lever connected to the cloth plate by a
spring motion, the stroke being controlled by two stop pieces fixed to one of the
slides of the cloth plate, and comes into action with an engaging slide which is
fitted to the bed of the machine. This engaging slide is actuated through the
medium of a lever connecting rod and springs by a suitable cam fixed on the
feed shaft. Connected to the above named engaging slide is a wedged shaped
action for regulating the width of button hole or bite, and a second wedge action
of similar character also connected to the engaging slide is provided to regulate the
length of the bars of the button hole, both being adjustable.
A feed wheel and cam containing within itself one or more friction blocks kept
in position by springs and fitted with a cain lever or arm for imparting a circum-
ferential motion to the feed wheel is fixed upon the second or feed shaft. A cam
fixed to the driving shaft gives through the connecting arm or feed lever the
requisite amount of motion to the feed wheel, and is regulated by the compound
or double sliding or lifting block or cam actuated from the feed cam previously
mentioned.
The third motion of the cloth plate is made through a rod connected at the
driving end with the can on the feed shaft previously alluded to through the
medium of a link held in the required position by an adjustable fulcrum, and a
lever carrying a roller which takes into the cam on feed shaft before mentioned.
This regulates the length of the button hole, the link being carried by an arm
pivotted to a suitable centre.
In the case of attachments for making button holes the above devices for
imparting the requisite motions to the pressure clamp are so modified and arranged
that they can be applied to various kinds of sewing machines being driven by a
shaft, rod, lever, or suitable connection from the most convenient point according
to the style of the particular machine to which the attachment is made.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said James Hunt and Joseph Sinclair Fairfax in the Great Seal Patent Office
on the 29th May 1882.
JAMES HUNT, of No. 58, Mann Street, Walworth, London, in the County of
Surrey, Mechanical Engineer, and JOSEPH SINCLAIR FAIRFAX, of No. 2, Laurence
Pountney Hill, London, in the County of Middlesex, Consulting Engineer.
"IMPROVEMENTS IN SEWING MACHINES FOR MAKING BUTTON HOLES."
The object of this Invention is to make button-holes in a more perfect manner
than heretofore, and to give to the operator of the machine complete control over
the character of the work to be done upon it, so that after an adjustment for a
particular class of button-hole the movements of the machine are entirely automatic,
motion only being given to the main shaft in any well known and convenient
manner.
The machine is constructed so that by adjustable movements a button-hole of
any required length may be made, any width of bite or stitching upon the sides
can be taken, the feed or closeness together of the said stitches can be regulated;
the number of stitches composing the bars and the length of those stitches may be
varied at will, consequently producing a stronger, neater, and more durable hole
than is made by the machines now in use.
The Invention herein shewn and described refers more particularly to that class
of machines wherein a shuttle is used, and where the needle has a reciprocating
vertical motion, but certain parts of this Invention are applicable to other classes
of sewing machines, and used for various kinds of sewing.
The operation of making a button hole, as hereinafter more particularly described,
consists in clamping the material to be operated upon to the cloth plate, and
causing the machine to sew a single row of stitching at a definite feed or rate of
advance, then to make a few longer stitches without advancing, which forms a bar,
then a similar motion or row of stitching to the first, but in the reverse direction
and parallel with it, and finally another bar at the commencing point, when the
threads may be cut and the work removed. The hole is afterwards opened, or the
two lines of stitching separated by a blunt edged chisel forced between them.
Throughout the various Figures of the annexed Drawings it is intended that
the reference letters used shall denote the same parts for similar purposes.
Fig. 1 is an elevation of the machine in the position required for operating.
Fig. 2 is a general plan.
Fig. 3 is also a plan, the cloth plate F and some of the upper portions of the
machine being removed.
Fig. 4 represents a modification of the mechanism H°, shewn in Fig. 3, connecting
with the cloth plate F.
Fig. 5 is a side elevation.
Fig. 6, a plan; and
Figs. 7, 8, 9, 10, 11, and 12 are details for a sliding block or compound
adjustable rest for feed vibrating lever for regulating the feed or fineness of stitch
on the sides of hole and the number of stitches comprising the bars.
Fig. 13 is a back elevation of the machine, with certain parts removed in order
to show the shifting fulcrum or link motion K and its connection with the cloth
plate F.

page_text: Fig. 22 is a longitudinal section shewing a back elevation of the feed cam I
driven by a cam Q on main shaft B through a vibrating lever 1' modified or
regulated by sliding blocks L and adjusting screws.
Figs. 23 and 24 shew an elevation and inverted plan of screw cam G, with lever
and spring bar driving arrangement for actuating the striking blocks G³ and G6, to
which the cloth plate F is attached.
Fig. 25 is an elevation of a friction feed, being a modification of that shewn in
Fig. 22.
Figs. 26, 27, 28, 29, and 30 are details of the adjustable sliding wedge actions
for regulating the stroke of the cloth plate, thereby varying the length of the stitch
at the bars and upon the sides of the button hole.
Figs. 31 to 45 inclusive are views of an attachment suitable for connection to a
"Singer" machine, and by means of which a button hole may be made. The
reference letters and the description of the action of the machine following will also
apply generally to the parts and movements of the attachment.
Fig. 31 is a general plan of an attachment, the cover or top of the frame being
removed.
Fig. 33 is also a plan, but having certain parts removed to show the others more
clearly.
Figs. 37 and 38 are a side and end elevation of the adjusting screws for moving
the sliding wedges H' and H³, whereby the length of the bar and side stitches are
regulated.
Figs. 41, 42, and 43 are views of the rest or compound sliding block
mechanism Land L³ for regulating the feed and number of stitches at the bars.
Figs. 32, 34, 35, 36, 39, and 40 are sections of the attachment at various points,
as indiented by the reference letters.
Fig. 44 is a plan, and Fig. 45 is an elevation of a modification of the actuating
levers, which are connected to the driving cams or otherwise of the particular
machine to which the attachinent is joined.
It will be observed that the parts comprising a particular movement are indicated
by a particular reference letter, the separate portions or details of the same group
being further indicated by numerals attached to the said letter.
A, A, represents the bed or frame of the machine, shewn as cast or formed in
one piece; B is the main or hand driving wheel on the shaft B1, which also carries
the grooved driving wheel B, cams B³, G, N, and Q, all properly secured to the
shaft in their relative positions.
O is the lever actuating the needle bar D at one end, driven from the cam B³ at
the other, and vibrating upon the pin C attached to the frame A.
↑ On motion being given to the main shaft A' of the machine by the hand wheel B
or grooved pulley B, three distinct movements are given to the cloth plate F, one
being a transverse motion at right angles to the front of the machine, by which
the sides or stitch of the button hole is formed; the second is similar in character,
and in the same direction, but occurs only at the ends of the hole and is usually
about double the length of the first, thus forming the bars; while the third motion
is in the direction of the length of the machine, and constitutes the feed, which
may be so regulated as to form any desired length of button hole.
The material to be operated upon is clamped by the spring pressure foot E to the
cloth plate F' and therefore partakes of the movements of the latter.
The spring pressure foot E at the end next the operator has an opening or eye
beneath which that part of the fabric to be operated upon is placed. This cye is
made larger than any button hole that may be required, and within the space or
eye the needle works. The spring pressure foot E is secured at the further end of
the cloth plate, and the end in which the eye is formed is deflected or pressed down
upon the work by means of an eccentric ended lever E' working within a frame or
standard E2, and a bearing lever E³ acting upon the foot or eye piece through an
adjusting screw E*, which compensates for the varying thickness of the work
operated upon.

page_text: G is a double path cam, the two paths communicating, and it is mounted on the
main shaft B. This cam serves to communicate a transverse or forward and
backward movement to the cloth plate F through the intervention of a vibrating
pin G' in the lever G2 pivoted on the fulcrum C³ and spring bar G', which actuates
the striking blocks G and Go, the spring from its flexibility compensating for the
variation of the length of stroke imparted to the striking blocks, as described
hereafter.
The length of the transverse stroke imparted to the cloth plate F, and con-
sequently the length of the stitch, is controlled by a sliding piece H, having
recesses cut upon its sides corresponding, and at certain periods of its stroke
engaging with similar recesses on the striking blocks G and G. The recesses and
projections upon the sides of the sliding piece or controller H are opposite to or in
line with each other, while the recesses or projections upon the striking blocks G
and are not exactly opposite each other, but are so placed that when, for
example, the projections and recesses of G³ and those on the adjoining side of the
sliding piece or controller H fit into or engage with each other the projections on
the other side of the sliding piece H and the projections on the striking block Ge
come into contact with each other, thus limiting the stroke upon this side and
having a corresponding effect upon the position of the cloth plate. In the same
manner, when the sliding piece H is moved so that its projections upon the opposite
side are brought into line with the projections on the striking blocks G³, the
stroke is limited, as before stated, with its corresponding position of the cloth plate,
each of these two places representing the stitching upon each side of the button
hole.
In forming the bars at the ends of the button hole, the transverse stroke of the
cloth plate F requires to be greater than that in forming the side stitches, and at
the same time the centre of the length of the bar stitch must coincide with the axis
or centre line of the button hole, and not be on one side, as are the side stitches.
This is effected by making the recesses upon the sides of the sliding piece or
controller H, and those on the faces of the striking blocks G and G wider than
the projections between the said recesses. When the feed cam I has through the
intervention of the spring connecting rod moved the sliding picce E to its limit of
stroke in either direction, the recesses on the sides of the latter are so placed that
the projections on the faces of the striking blocks and G have free entrance, as
have also the projections of E into the recesses of G³ and G³, although, as previously
stated, the projections of the striking blocks are not exactly opposite each other.
The action is then to limit the stroke upon one side of the axis of the button hole;
when working upon the sides through the two sets of projections, upon that side
coming into contact with each other, as previously explained, while in working
upon the bars, through the shifting of the controller H and the widening of the
recesses, the stroke has its fullest range upon each side equally, thus allowing of
the longest possible stroke of the striking blocks, and therefore of the cloth plate
attached thereto, the centre of the stroke coinciding with the centre of the button
hole.
It will thus be seen that the sliding piece H, in connection with the striking
blocks G and Go governs or controls the making of a button hole of the greatest
length of bar and side stitches, but the adjustment for the length of these stitches
has yet to be provided for. A double wedge shaped piece H is mounted upon and
moving with the sliding controller H. Through a fork shaped piece on the outer
end of the former engaging with a screw tapped into the latter, the double wedge
piece H is capable of an independent longitudinal adjustment, although partaking
of the movement of H, which has just been described. The double wedge piece H¹
is guided centrally by a fixed block R, which also guides the controller H. and
sustains the shock imparted by the spring bar G to the striking blocks Go and G.
The double wedge piece H' is provided with two reverse placed wedges H³, H²,
(omitted in Fig. 22) capable of a transverse movement, but prevented from moving
longitudinally by stops attached to the controller H. The wedges H, H³, aro also

page_text: provided with recesses and projections on their striking faces coinciding with those
of G and G, but less in amplitude. When the double wedge piece H¹ is adjusted
by the screw, so as to force the small wedges H2, H3, cutwards, the effect is to
arrest the motions of the striking blocks G³ and G6 sooner than would otherwise
occur, thereby shortening the transverse stroke of the cloth plate F, and
consequently reducing the stitch or bite upon the sides of the hole, the central
line of the button hole not being affected.
The fork upon the double wedge piece H³, to which the adjusting screw of H is
connected is inade double so as to embrace or connect a similar adjusting screw
and double wedge piece H³, and two single reverse placed wedges H, H, (omitted
in Fig. 22) mounted upon the top of the wedge pieces H¹ and H, H, and likewise
guided by the same fixed block R. The two wedges H, H, however are not in
this case provided with recesses and projections on their striking faces, but are left
quite plain, and by a similar process of adjustment to that described for the side
stitches the wedge pieces H³ and H, H, control and regulate the stroke of the
cloth plate F when forming the bar, and consequently the length of the bar
stitch.
The feed cam I has a concentric recess turned upon the side farthest from the
operator, and upon the shaft M which carries the cam is mounted a vibrating lever
having a cam shaped hub. Between this hub and the inner circumference of the
recess, and conforming to the two surfaces thereof, are placed one or more friction
blocks or curved wedges 12, 12, with springs so placed as to force or wodge them
between the cam shaped surface of the eye or hub of the vibrating lever I has a
roller bearing upon a cam Q, fixed on the main shaft B, and when the lever I is lifted
by the throw of the cam Q the action is such as to wedge the curved blocks or
struts I2, 12, against the inner rim of the cam I, partly revolving the latter in
proportion to the lift given to the lever I', a spring returning the said lever to the
required position for the next throw of the cam Q, and a spring break 13 preventing
any undue or return motion of the feed cam.
This intermittant motion or partial revolution of the feed cam I takes place at
the proper point of the needle's stroke, and it is communicated to the cloth plate F
by means of the connecting rod K³ driven from a cam path on the rear side of the
cam I, the cloth plate F being mounted upon the striking block G by a pin P in
such a way as to allow a longitudinal motion, independently of the transverse
motion imparted to the cloth plate F by the striking blocks G and G6.
On the periphery of the cam I is cut a groove or cam path It in two parallel
lines, each line taking up nearly one half of the circumference, but upon opposite
sides and upon two planes separated from each other by a small space.
In the
middle of this space, between the terminations of the former two lines and parallel
with them, are two short paths, and like the former upon opposite sides of the
diameter of the cam.
These two short paths are connected to the long ones by short diagonal or
inclined paths, thus making the cam path or groove continuous, but with offsets or
throws at exactly opposite points on the periphery, and corresponding to the bars
or ends of the button hole. A bell crank lever L is pivoted to the frame of the
machine, and a pin or roller L' is attached to the lever L and engages into the
cam path I, which has the effect of throwing the lever L backwards and forwards
in the revolution of the cam I at the offsets in the cam path I', the two short
central positions of the groove or path forming a dwell or pausing space exactly in
the centre, as before stated, corresponding to the formation of the bars, while the
two long or outer portions of the can path I agree with the making of the two
sides of the button hole, the inclines or diagonal portions of the cam path throwing
the sliding piece H into such a position in relation to the striking blocks G³ and
Ge as to correspond to the two sides of the button hole, as previously stated, the
motion being communicated from the bell crank lever L through the short arın H³
and spring connecting rod H; a modification of this rod is shewn at Fig. 4.
The feed or closeness of the stitches on the sides of the button hole is regulated

page_text: as follows:-The cam Q which actuates the vibrating lever I' having a maximum
throw, lifts the lever accordingly at each revolution, thereby advancing the feed
cam I a definite proportion of its circumference, a spring returning the vibrating
lever to its first position ready for the next lift or throw of the cam Q. To
produce a finer stitch than the maximum, the end of the vibrating lever I¹ is
caused to impinge upon a compound sliding block or rest L³, L3, L4, by the spring
pressure just mentioned, and as this sliding block is bevelled upon its bearing
face and capable of adjustment by screws L, Le, towards or away from the cam Q,
it will be seen that by drawing the bevelled face outwards the vibrating arin is
arrested earlier in its downward movement, and lifted later by the upward throw
of the cam Q, thus reducing the range of stroke of the vibrating lever I upon the
feed cam I, and therefore producing a finer stitch.
The compound sliding block or rest is composed of a carriage L², on which two
bevelled face pieces L³ and L have an independent adjustable movement, the latter
piece being cut away in the centre of its bevelled face so as to allow the other L³
to slide within it and in the same direction. This central sliding piece determines
the number of stitches on the bars independently of the adjustment for the side
stitches, for it will be clear that if it be drawn outwards from the cam Q and
caused to pass beneath the vibrating feed lever by the transverse motion of the
bell crank lever L at that part of the revolution of the feed cam I corresponding
to the formation of the bars, it will arrest its motion downwards earlier, and cause
it to be lifted later than when the feed lever has a greater range of stroke, and in
consequence it takes more time to pass over that part of the button hole and sews
more stitches at the bars, the controlling mechanism at this point allowing the
cloth plate its full transverse stroke without any longitudinal motion, but as the
feed cam I continues to revolve it brings that portion of the cam path I' which
governs the side stitches into position to act upon the bell crank lever L, which
slides the controlling mechanism into position to limit the stroke of the striking
blocks upon one side, as before stated, and at the same time throwing the com-
pound rest transversely, so as to bring the side portions of the rest L' beneath the
vibrating feed lever, and these having a separate adjustment for the side stitches
the relative proportion or number of stitches at the bars and upon the sides may.
be regulated to suit the class of work under operation.
The automatic movement of the controlling and feeding mechanism just alluded
to is more fully described as follows:-The bell crank lever L engages into the cam
path I by the pin or roller L', the arm carrying this pin or roller being continued
and connected with the compound slide L, so that when the feed cain I revolves to
those points in its periphery where the path 1 imparts a transverse movement or
throw to the pin or roller L', the outer end of the bell crank lever L conveys
the required notion to the compound slide L, while the inner eml of the
bell crank lever L imparts the corresponding motion to the controlling slide H
through the intervention of the return arm H³ and spring connecting rod H.
The inner side of the feed cam i, or that side nearest the operator, is provided
with a cam path, indicated by the dotted lines in Fig. 13, in which a roller K
engages. This roller is mounted upon a stud connecting together a pivoted arm K'
and link K. The lower end of the link is attached to a connecting rod K³ which
imparts a longitudinal motion to the cloth plate F. Within the link is a sliding
block K raised or lowered by an adjusting screw K³ and moveable nut Ko, a part
of the nut being formed into a pin upon which the sliding block K* oscillates. The
roller K working in the cam path gives motion to the upper portion of the link K³,
which working upon the sliding block K and adjustable nut Ke as a fulcrum
causes the lower end of the link to have a greater or lesser longitudinal stroke as
the fulcrum is raised or lowered, the stroke being communicated to the cloth plate
by the rod K³, and this determines the length of the button hole. When tho
adjustable fulcrum is raised to its highest point and therefore nearest to the
driving roller K, the lower end of the link has the greatest range of stroke, and
accordingly produces the longest bole; but when the block is lowered as far as it

page_text: will go, the range of stroke if the lower end of the link is least, and so produces
the least amount of longitudinal motion to the cloth plate. The relative distance
therefore between the centres of the roller K and fulcrum, and the centres of the
fulcrum and pin at the lower end of the link governs the length of the button hole
in all cases.
It will be understood that certain parts may be modified without affecting the
general principle, controlling or underlying the movements and purposes of such
parts, as for instance, the manner of making a friction feed, as shewn in Fig. 22,
may be altered in the manner shewn in Fig. 25, and the spring connecting rod H
Fig. 3, which is used in connection with the controller H may be modified by the
double spring arrangement, shewn in Figs. 4 and 33, and the general arrangement
shewn by the Figures 1 to 30, and described herein, are necessarily modified or
rearranged when put into the form of an attachment to an ordinary sewing
machine, as is shewn by Figs. 31 to 42, which illustrates an attachment to a Singer
family machine, while this again may be varied to suit other kinds of sewing.
machines, and the space to be allotted for the attachment; or certain parts shewn
and described may be used for sewing machines other than those for making
button holes, but all this we regard as of our Invention.
Having thus particularly described our said Invention, and the manner of
performing the same, we desire it to be understood that we do not confine
ourselves to the precise details herein described or delineated, but what we
believe to be novel and original, and therefore claim as the Invention secured to
us by the herein before in part recited Letters Patent is,-
1. An adjustable fulcrum whereby the length of a button hole may be regulated,
substantially as and for the purpose specified.
2. The combination of a fixed or moveable link with a slide block and actuating
cam, substantially us and for the purpose specified.
3. An adjustable stop or stops, whereby the length of the bar of a button hole
may be regulated, substantially as and for the purpose specified.
4. The combination with a cloth plate of an adjustable mechanism, whereby the
length of the bars of a button hole may be regulated, substantially as and for the
purpose specified.
5. A controlling piece in combination with a guide, substantially as and for the
purpose specified.
6. The combination of one or more regulating slides with a controlling piece,
substantially as and for the purpose specified.
7. The combination of an adjustable slide or slides with striking blocks, whereby
the length of the bar or side stitch, or both, may be regulated, substantially as and
for the purpose specified.
8. A variable feed giving more or less time for the formation of the bar stitch,
substantially as and for the purpose specified.
9. An adjustable variable stroke or throw, whereby the feed or number of
stitches may be regulated or controlled at the bar or bars of a button hole,
substantially as and for the purpose specified.
10. The combination of adjustable rests, whereby the number of bar and side
stitches may be regulated, substantially as and for the purpose specified.
11. The combination of an adjustable mechanism for varying the number of bar
stitches with a cloth plate, substantially as and for the purpose specified.
12. The combination of a spring pressure foot, bearing lever and adjusting screw,
eccentric ended lever and standard with a moveable cloth plate, substantially as
and for the purpose specified.
13. In a friction feed, the combination of a vibrating lever and springs with one
or more curved blocks or wedges and a cam shaped hub, substantially as and for
the purpose specified.
14. In a friction feed, the combination of a vibrating lever with one or more
curved blocks or wedges, a strut or struts and springs, substantially as and for the
purpose specified.

page_text: 15. The combination of side cheeks or wedge pieces with a wedge piece or cone
and striking blocks, substantially as and for the purpose specified.
16. A spring lever or spring connecting rod combined with a controlling and
regulating mechanism, whereby a varying shock or stroke is made to conform to
the release of the controlling device, substantially as and for the purpose specified.
17. The combination with striking blocks of a guide block sustaining the shock
of the former, substantially as and for the purpose specified.
18. The combination of a friction feed with a cam for actuating a controlling
and regulating mechanism, and a cam for actuating a link motion, substantially as
and for the purpose specified.
19. The combination of an adjustable rest, adjustable controlling or regulating
mechanism, and adjustable fulcrum, substantially as and for the purpose specified.
20. The combination of a cloth plate and its slides with striking blocks, spring
lever, and actuating cam, substantially as and for the purpose specified.
21. The combination of an adjustable rest with a variable feed and moveable
cloth plate, substantially as and for the purpose specified.
22. The combination of a friction feed with a connecting rod S, lever L', and
roller L, and an adjustable rest or rests, substantially as and for the purpose
specified.
23. The combination of the lever L' and roller L³ with a lever Q and arm or
lever G (as in Fig. 31) with actuating mechanism, substantially as and for the
purpose specified.
24. The combination of spring lever G4, tongue lever T, slide rod carrying
striking blocks with a controlling or regulating device, substantially as and for the
purpose specified.
25. In an attachment for sewing button-holes, the combination of the various
parts for the purpose set forth, substantially as described.
In witness whereof, we, the said James Hunt and Joseph Sinclair Fairfax,
have hereunto set our hands and seals, this 27th day of May, in the year
of our Lord 1882.
JAMES HUNT.
(L.S.)
JOSEPH SINCLAIR FAIRFAX. (L.S.)