IMPROVEMENTS IN SEWING MACHINES."
Year: 1881

page_text: LETTERS PATENT to Alexander Anderson and George Browning, both of
Glasgow, in the County of Lanark, North Britain, for an Invention of
"IMPROVEMENTS IN SEWING MACHINES."
PROVISIONAL SPECIFICATION left by the said Alexander Anderson and
George Browning at the Office of the Commissioners of Patents on the
16th February 1881.
ALEXANDER ANDERSON and GEORGE BROWNING, both of Glasgow, in the
County of Lanark, North Britain. "IMPROVEMENTS IN SEWING MACHINES."
This Invention, which relates to improvements in sewing machines, consists as
follows:-
Firstly. In a new or improved arrangement of mechanism for engaging and
disengaging the fly or "balance" wheel from actuating or ceasing to actuate the
driving shaft of sewing machines at particular points of the stroke of the needle,
these particular points of the stroke of the needle being respectively the upper
part of the stroke, that is to say, when the needle is drawn up out of the cloth, and
the lower part of the stroke when the needle is carried down and passsd into or
through the cloth, and at which last mentioned position of the needle this arrange-
ment permits of the presser bar and foot being lifted, so as to leave the cloth free
to be turned round upon the needle as a pivot or axis to any required position on
the table of the sewing machine.
This mechanism consists of a collar securely fixed to the outer end of the
driving shaft, that is to say, between the end of the arm and the boss of the fly or
"balance" wheel. In this collar a slot is formed, into which a bolt capable of sliding
a short distance horizontally, vertically, or at any intermediate angle is fitted; this
bolt is acted upon by a spring, which when the wheel and shaft and driving
connection forces the end of the bolt into a corresponding recess cut in the boss of
the fly or "balance" wheel.
.
A tail forming part of the bolt projects a short distance out through a hole in
the side of the collar, which when it is desired to stop the sewing machine, either

page_text: at the upper or at the lower part of the stroke of the needle, is brought into
contact with one of two cam inclined or curved surfaces. These two surfaces are
each respectively formed upon the arms of a forked lever, which is centred upon
the end or back part of the arm of the sewing machine, and which is capable of
being moved through a sufficient distance on either side of its central position as
to bring one or other of the said cam inclined or curved surfaces in contact with the
tail of the bolt. When such contact is made, either by the hand or foot of the
operator moving the said forked lever to either side of its central position, the bolt
is withdrawn from the fly or "balance" wheel, and the machine thereby stopped
whilst the fly or "balance" wheel continues to rotate as before.
A further and particular feature in the construction of the forked lever is that at
the highest part of each cam inclined or curved surface a stop is formed, which is
in such a position as to prevent the mechanism, by its own momentum or otherwise,
from carrying the needle beyond the desired position at the upper or lower parts of
its stroke.
In order to lift the presser from the cloth being sewn in the machine one of the
arms of the two armed lever hereinbefore referred to is provided with a short
bracket, on which is carried a bell crank lever moveable about an axis. This bell
crank lever is connected by a rod, chain, cord, or the equivalents thereof, either to
the presser bar or its lifter, by which the presser is raised or allowed to descend,
so that when the bell crank is brought into such position by the movement of the
forked lever as will bring one end or tail of the bell crank lever into contact with
the tail of the bolt in the collar herein before described, the action of the tail of that
bolt thereon causes the said bell crank lever to be moved sufficiently to pull through
the mechanism aforesaid, or through equivalent mechanism, the presser up from the
cloth, it being understood that such mechanism may be connected to the presser bar
or indirectly thereto through the "lifter." It is intended that this mechanism
for lifting the presser may operate when the needle is in or out of the cloth.
After stopping the sewing machine in either of the positions hereinbefore
described, its driving is resumed by returning the forked lever into its central
position, whereby both cam surfaces are placed out of contact with the tail of the
locking bolt, so that the said bolt is pressed by the action of its spring into the
slots or catches in the boss of the fly or "balance" wheel immediately that the bolt
" balance wheel
and one such slot are by the continued rotation of the fly or
brought opposite to each other, at the same time the bell crank lever and its con-
nections, which have previously raised the presser, being disengaged from the tail
of the bolt allow the presser to fall upon cloth.
"
Secondly. The improvements relate to what are known as the needle clamps
of sewing machines, viz., that detail of such machines whereby the needle is
attached to the needle bar. The object of this part of the improvements is to
facilitate the threading or passing of the thread into or through the clamp, and
whereby the hitherto somewhat tedious operation of passing the thread through
a hole drilled in the clamp is dispensed with. The improvements in this respect
consist in substituting for the drilled hole hitherto used a slot and a retaining pin,
such slot being either cut into the clamp from the outside or from the inside.
When cut from the outside the retaining pin is placed at the lower part of the slot
at right angles thereto, and as near as practicable to the lower inner face of the
groove of
said slot, so as to deliver the thread at as little angle as possible to the
the needle. When the slot is cut on the inner side of the clamp a free space is
provided between it and the needle bar to allow the thread to be passed into the
slot, and in this case the retaining pin is by preference placed at the side of the slot
in the clamp.
Thirdly. The improvements relate to that class of shuttles known as self
threading shuttles, and wherein a U shaped bar, which is attached by a permanent
pivot connection to the lower side of the shuttle, is used, the connection or pivot
by or upon which it is coupled to the upper side of the shuttle not being permanent,
but consisting of a projection formed on the upper side of the tail of the Ushaped

page_text: bar immediately opposite to the permanent pivot on the lower side of the U shaped
bar. By virtue of the elasticity of the U shaped bar this pivot is retained in the
hole or recess at the upper side of the shuttle, and so that the U shaped bar may
be moved on both pivots. This elastic connection of the pivot at the upper side
of the shuttle permits the passing of the thread one or more times round that part
of the U shaped bar whereby the tension is produced, the tail of the U shaped
bar at the upper side being out of contact with the inside of the shuttle so as to
allow the thread to be freely passed around and pulled past the elastic pivot the
number of times requisite to produce the tension..
Fourthly. The improvements relate to the winders of sewing machines for the
purpose of winding the thread on to the spools or bobbins used in the shuttles of
sewing machines. In the improved winder the thread is led between two plates
attached to an antifriction wheel which runs or travels upon a horizontal bar placed
beneath the axis of the spool or bobbin and parallel thereto. The horizontal bar
is situated above the periphery of the antifriction wheel, and the antifriction wheel
during winding is drawn up in contact with the under side of the bar by the drag
of the thread through the tension plates. Around the end of the driving spindle
which retains the spool or bobbin a spring is carried, one end of which passes
through a hole in the cup and drives the bobbin whilst the other end forms a hook
or retaining piece upon or by which the thread to be wound is held at the starting
of the winding operation. The thread in passing to the tension plates is led
through an cyclet at the upper part of a wire attached to the pressure plate which
acts against the thread being wound on the bobbin. Projecting from the back of
the presser plate of the winder, and at right angles thereto is another plate called
a "trip off" plate, and in which a cam surface is formed which engages with an
adjustable horizontal pin carried in the base or foundation of the winder. This
cain surface and horizontal pin during the winding operation keep the driving
wheel of the winder in contact with the fly or "balance" wheel of the sewing
machine until the spool or bobbin is filled, at which time the cam surface being
actuated by the presser plate arrives at such a position of its contour relatively
with the position of the horizontal pin that it permits a spring attached to the base
of the winder to push out the upper part thereof so that the driven wheel of the
winder and the fly or "balance" wheel of the sewing machine are thrown out of
contact and the winding operation is stopped.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Alexander Anderson and George Browning in the Great Seal
Patent Office on the 15th August 1881.
ALEXANDER ANDERSON and GEORGE BROWNING, both of Glasgow, in the
County of Lanark, North Britain. "IMPROVEMENTS IN SEWING MACHINES."
Our said Invention relates to improvements in sewing machines, and consists as
follows:-
Firstly. In a new or improved arrangement of mechanism for engaging and
disengaging the fly or "balance" wheel for actuating or ceasing to actuate the
driving shaft of sewing machines at particular points of the stroke of the needle,
these particular points of the stroke of the needle being respectively the
upper part of the stroke, that is to say, when the needle is drawn up out of
the cloth, and the lower part of the stroke when the needle is carried down
and passed into or through the cloth. In this latter position of the needle
when the presser bar and foot is lifted the cloth is free to be turned round
upon the needle as a pivot or axis to any required position on the table of the
sewing machine. The said mechanism consists of a collar securely fixed to or
formed on the outer end of the driving shaft, that is to say, between the end of the
arm and the boss of the fly or "balance" wheel. In this collar a slot is formed
into which a bolt capable of sliding a short distance horizontally, vertically, or at
any intermediate angle is fitted; this bolt is acted upon by a spring, which when
the wheel and shaft are in driving connection forces the end of the bolt into a
corresponding recess cut into the boss of the fly or "balance" wheel. A tail forming
part of the bolt projects a short distance out through a hole in the side of the
collar, and when it is desired to stop the sewing machine, either at the upper or at
the lower part of the stroke of the needle, this tail is caused to come into contact
with one of two cam inclined or curved surfaces. These two surfaces arc each
respectively formed upon the arms of a forked lever which is centred upon the end
or back part of the arm of the sewing machine, and which is capable of being
moved through a sufficient distance on either side of its central position as to bring
one or other of the said cam inclined or curved surfaces in contact with the tail of
the bolt. When such contact is made either by the hand or foot of the operator
moving the said forked lever to either side of its central position the bolt is with-
drawn from the fly or "balance" wheel, and the machine thereby stopped whilst
the fly or "balance" wheel continues to rotate as before. A further and particular
feature in the construction of the forked lever is that at the termination of each
cam inclined or curved surface a stop is formed, which is in such a position as to
prevent the mechanism by its own momentum or otherwise from carrying the
needle beyond the desired position at the upper or lower parts of its stroke. After
stopping the sewing machine in either of the positions hercin before described its
driving is resumed by returning the forked lever into its central position, whereby
both cam surfaces are placed out of contact with the tail of the locking bolt, so that
the said bolt is pressed by the action of its spring into a slot or catch in the boss of
the fly or "balance" wheel immediately that the bolt and one such slot are by the
continued rotation of the fly or "balance" wheel brought opposite to each other.
Secondly. Our improvements relate to what are known as the needle clamps of
sewing machines, viz., that detail of such machines whereby the needle is attached
to the needle bar. The object of this part of the improvements is to facilitate the
threading or passing of the thread into or through the clamp, whereby the hitherto
somewhat tedious operation of passing the thread through a hole drilled in the
clamp is dispensed with. Our improvement in this respect consists in substituting
for the drilled hole hitherto used a slot and a retaining pin, such slot being either

page_text: cut into the clamp from the outside or from the inside. When cut from the outside
the retaining pin is placed at the lower part of the slot at right angles thereto, and
as near as practicable to the lower inner face of the said slot so as to deliver the
thread at as little angle as possible to the groove of the needle. When the slot is
cut on the inner side of the clamp a free space is provided between it and the
needle bar to allow the thread to be passed into the slot, and in this case the
retaining pin is by preference placed at the upper side of the slot in the
clamp.
Thirdly. Our improvements relate to that class of shuttles known as self
threading shuttles, and wherein a U shaped bar, which is attached by a permanent
pivot connection to the lower side of the shuttle, is used, the connection or pivot
by or upon which it is coupled to the upper side of the shuttle not being permanent
but consisting of a projection formed on the upper side of the tail of the U shaped
bar immediately opposite to the permanent pivot on the lower side of the
U shaped bar. By virtue of the elasticity of the U shaped bar this pivot is
retained in the hole or recess at the upper side of the shuttle and so that the
U shaped bar may be moved on both pivots. This elastic or yielding connection of
the pivot at the upper side of the shuttle permits the passing of the thread one or
more times round that part of the U shaped bar, whereby the tension is produced,
the tail of the U shaped bar at the upper side being out of contact with the inside
of the shuttle so as to allow the thread to be freely passed around and pulled past
the elastic pivot the number of times requisite to produce the tension.
Fourthly. Our improvements relate to the winders of sewing machines for the
purpose of winding the thread onto the spools or bobbins used in the shuttles of
sewing machines. In our improved winder the thread is led between two plates
attached to an antifriction wheel which runs or travels upon or against a horizontal
bar placed beneath the axis of the spool or bobbin and parallel thereto. The
horizontal bar is situated 'above the periphery of the antifriction wheel, and the
antifriction wheel during winding is drawn up in contact with the underside of
this bar by the drag of the thread through the tension plates. Around the end of
the driving spindle which retains the spool or bobbin a spring is carried, one end
of which passes through a hole into the cup and drives the bobbin, whilst the
other end forms a hook or retaining piece upon or by which the thread to be
wound is held at the starting of the winding operation. The thread in passing to
the tension plates is led through an eyelet at the upper part of a wire attached to
the presser plate, which acts against the thread being wound on the bobbin.
Projecting from the back of the presser plate of the winder and at right angles
thereto is another plate, called a "trip off" plate, and in which a cam surface is
formed, which engages with an adjustable horizontal pin carried in the base or
foundation of the winder. This cam surface and horizontal pin during the winding
operation keep the driving wheel of the winder in contact with the fly or
"balance wheel of the sewing machine until the spool or bobbin is filled, at
which time the cam surface being actuated by the presser plate arrives at such a
position of its contour relatively with the position of the horizontal pin that it
permits a spring attached to the base of the winder to push out the upper part
thereof so that the driving wheel of the winder and the fly or "balance
wheel of the sewing machine are thrown out of contact and the winding operation
is stopped.
"
And in order that our said Invention may be properly understood we now
proceed more particularly to set forth the system, mode, or manner, in or under
which the same is or may be used or practically carried into effect, reference being
had to the accompanying Drawings and to the letters and figures marked thereon,
that is to say,
Figures 1 to 7 illustrate the hercinbefore stated first head of our improvements,
Figure 1 being a transverse section of the table of a sewing machine (the balance
wheel being removed), and Figure 2 a plan of underside of part of the said table;
Figure 3 is a transverse section (on the line 1, 2, Figure 4), and Figure 4 is a

page_text: 83
longitudinal section of the one end of a sewing machine illustrating the said part of
our improvements; Figures 5 to 7 are details, as hereinafter described. The fly or
balance wheel A is mounted upon the end of the driving shaft B, and secured
thereto by the end plate a and screw a² (see Figure 4). Upon the said shaft B is
formed or fixed a collar b situated between the end of the arm or framing C of the
machine and the boss of the wheel A. In this collar b is a slot b², in which a bolt e
is capable of sliding lengthwise, the spring pressing the said bolt forward so that
its end engages in one of the slots or orifices a" in the boss of the wheel A. A
confining piece b³ secures the bolt e in position, the said piece b³ leaving space for a
tail piece e upon the bolt e, to slide with the bolt through the requisite distance.
A bell crank lever G is pivotted at g to the arm or framing of the machine, the
upper part of the said lever being bifurcated or terminating in two horns g³, one
situated at either side of the collar b on the driving shaft. Upon each of these
horns g² is an inclined plane g³, that on the one horn inclining upwards and
outwards or away from the wheel A, and that on the other horn inclining downwards
and outwards or away from the wheel A; Figures 6 and 7 shew these horns each as
seen from the inside. At the termination of each inclined surface, where it is
farthest from the wheel A is a stop g. In the normal position of the parts (that
is to say, when the bolt e engages in a recess a³ in the boss of the balance wheel A,
so that the shaft B is driven thereby), the two horns g² are situated clear of the
tail of the said bolt e. If it be wished to stop the operation of the machine one
or other of the horns g² is brought into such a position that the inclined.plane g³
upon it is in the path of the said tail e² of the lever e, and consequently the said
tail coming into contact with the part of the said inclined surface nearest to the
wheel A is by the revolution of the parts caused to travel along the said surface
until it comes into contact with the stop g', when the bolt e will have been fully
withdrawn from the recess in the balance wheel, and the said balance wheel will
revolve loosely on the shaft B. We do not limit ourselves to any precise mechanical
arrangement for bringing the said inclined surfaces into or withdrawing them from
the path of the tail of the bolt c. In Figures 1 and 2, we have shewn a convenient
means for effecting this. To the tail of the bell crank lever G is attached one end
of a link g³, the other end of the said link being jointed to the rod / projecting
from the rocking bar H turning upon centre pins h² in brackets s beneath the
table. To this rocking bar H are affixed cross arms' having their ends bent down-
wards at right angles beneath the table so as to be in convenient position with the
knees of the operator. When the one arm his pressed in one direction, a motion
of partial rotation is given to the rocking bar H to cause the rod to pull upon
the link go, and by depressing the tail of the lever G to cause the incline g³ on one
of the horns g to come into the path of the projection e², and disengage the bolt c
from the recess in the boss of the balance wheel. When the other of the arms is
pressed in the reverse direction the rocking bar H through the arm and link g
presses upon the tail of the lever G, and by bringing the horns g² into the position
shewn in Figure 1, and the bead of the bolt being no longer retained by the horn,
the said bolt e is acted upon by the spring f, and caused to again engage with one
of the recesses a³ in the boss of the balance wheel A, and so put the said wheel A
and the shaft B into working connection. By a further movement of this arm /
in the same direction, the tail of the lever G is elevated so that the other of the
inclines g³ on the other of the horns gå is brought into the path of the projection e²
to withdraw the bolt e from the recess a³ in the boss of the balance wheel A. The
stop g on the one horn g² is in such a position as to stop the machine whilst the
needle is out of the cloth, and the other stop g' on the other of the horns gå is in
such a position as to stop the machine when the needle is in the cloth, in which
position, on the presser foot being raised, the work may be turned round upon the
needle as a pivot. In order to retain the horns g² in the position to which they
have been brought, a spring catch with a bevelled end is provided in a guide at i,
the said catch being pressed forward into a recess or recesses in the side of the tail
of the lever G, as shewn in the horizontal section of this part in Figure 5, the said

page_text: catch yielding when the said tail of the lever G is elevated or depressed by pressing
upon one or other of the arms as aforesaid. In Figure 3, the full lines shew the
horns in their mid position when the balance wheel A and shaft B are in working
connection, and the dotted lines shew the position when one of the said horns g² is
brought into the path of the projection e³ to withdraw the bolt e from the recess a³
in the balance wheel A. The arrow indicates the direction of motion of the balance
wheel. It will be evident that if desired there may be but one incline to stop the
machine either when the needle is out of or in the cloth.
A needle clamp constructed according to the second head of our Invention is
illustrated in side and front elevations respectively in Figures 8 and 9. The said
clamp is marked J, and is affixed to the end of the needle bar K by a screw j in
the ordinary manner. A slot je is formed in the said clamp J, and a pin j³ is fixed
at the lower part of the said slot j³, preferably as near as may be to the lower inner
face of the said slot so as to deliver the thread at as small an angle as possible to
the needle. In engaging the needle thread with this clamp the said thread is
passed over the pin j³, and then into the slot j2, whereby the said thread is engaged
with great facility with the guide formed between the inner side of the pin ³ and
the inner face of the slot j, as shewn in the said Figures 8 and 9, where the thread
is marked j It will be readily understood that the slot could be cut from the
inner side of the clamp J instead of from the outer side as shewn, a free space being
provided between the said clamp and the needle bar to allow the thread to be
passed into the slot, and in this case the pin is by preference placed at the upper
side of the said slot.
Figures 10 and 11 represent in side elevation and longitudinal section respectively
a shuttle provided with the improvement constituting the third head of our
Invention as aforesaid. The U shaped bar is attached to the lower side of the
shuttle by the permanent pivot or fixed centre . The pivot by which the other
side of the bar is pivoted to the upper side of the shuttle consists of a projection 1³
immediately opposite the pivot , but this pivot is retained in the hole or slot *
in the side of the shuttle by the elasticity of the said bar at the side on which
this pivot is situated, so that the bar & may be raised on both pivots as centres.
This yielding connection of the one arm of the bar allows of the said arm being
employed to give tension to the thread from the spool in the shuttle, the said arm
at the part marked being out of contact with the inner side of the shuttle so
that the thread from the spool after being passed into the notch when the bar
is raised may be readily passed (after the said bar is closed down) into the slot l
and onto the said part of the arm l, the said thread being pulled past the pivot l³.
The said thread is so passed round the part 1 of the bar the requisite number of
times to give the necessary tension. The thread is indicated by the dotted lines as
being passed once around the said part of the bar l.
Figures 12 to 17 illustrate a winder constructed according to the fourth head of
our improvements, as hereinbefore mentioned, Figure 12 being a front elevation,
and Figure 13 a back elevation of the said winder; and Figures 14 and 15 being
transverse sections, and Figures 16 and 17 horizontal sections on the line 3, 4,
(Figure 12), shewing part of the winder in two positions, as hereinafter described.
The base plate M of the winder is secured to the bed plate of the sewing machine
in such position that the friction wheel p² may be brought into contact with the
balance wheel to be driven by frictional contact therewith. The upper framing N
of the winder is capable of turning upon the centre at m, in the base plate M. The
said framing N carries in the collars p the two parts of the driving spindle between
which the spool p³ is held, a spring collar p' being around the end of one part of
the spindle, one end of the said collar p' being bent inwards at p into the cup which
receives one end of the spool 23 to engage with a nick in the said end of the spool
to give a driving connection of the said spool with the said spindle. The other
end of the said spring collar forms a retaining piece or hook to hold the end of the
thread in commencing to wind a spool. Beneath the said spindle the said framing N
carries two horizontal bars q and r. To the bar is hinged the presser plate 1.²

page_text: pressed upon the spool by the spring 3. To the back of this presser plate is
fixed a "trip-off plate" 8, in which is a slot s², with which engages a pin t retaining
the frame N in position against the action of the spring u which tends to thrust
the said framing N outwards. The said pin t is held adjustably in a hole in the
snug m² in the base plate M, and is secured in its adjusted position by the pinching
screw t3. The side of the slot 82 is formed with a can surface, which for a part of
its length is struck from the centre upon which the presser plate 2 turns, and
then has a recessed part at a greater distance from this centre. A guide
eye, for the thread to be wound, is formed in the upper end of the wire v,
attached to the presser plate A plate w carries a spring tension plate w
fixed and adjusted by the screw w³. The said plate w is attached by the
pin to an antifriction wheel w, which, when the winder is in operation,
is by the tension of the thread being wound caused to be brought up against
and to run upon the bar q. The action of this winder is as follows:-The end of
the thread to be wound upon the spool is passed through the eye v² in the wire v,
and thence between the plates wand w, the plate w being provided with a
bevelled lip at w to facilitate the passage of the thread. The end of the said
thread is then secured in the one end of the spring catch p. The friction wheel p²
on the spindle of the winder being in frictional contact with the balance wheel
(indicated by the line at A in Figures 14 and 15), on the said balance wheel being
rotated the spool p³ is caused to revolve and the thread to be wound thereupon,
the wheel w by the tension of the thread being held up against the bar
running therealong, and causing the thread to be laid evenly upon the spool p³, the
When one layer
presser plate 3 pressing upon the said thread as it is so wound.
of thread has been wound the wheel w runs in the reverse direction upon the
bar q, and another layer of thread is wound upon the spool, and so on until the
requisite amount has been wound upon the spool, at which time the presser plate 72
will have been urged out against its spring until the recessed part 83 in the trip-oft
plate & comes opposite the pin t, when the upper framing N will by the action of
the spring u be moved upon its centre m into the position shown in Figures 15
and 17, and the wheel 22 will be brought out of contact with the balance wheel and
the winding will be thus automatically stopped.
and
The time at which this stopping will take place will of course be dependent upon
the length of the cam surface in the slot s at a constant distance from the centre
upon which the presser plate turns which has to pass over the pin t before the
recess 83 comes opposite the said pin t, and therefore by raising or lowering this
pin t and fixing it in position by the screw to a less or greater quantity of thread
will be wound upon the spool before the winding is stopped. In the Drawing a
further curved surface x struck from the centre upon which the presser plate 2
turns and another recess a² are represented to enable the plates to be thrown
backward to a sufficient extent, and so retained to allow of the withdrawal and
insertion of spools.
Having now described and particularly ascertained the nature of our said
Invention, and the system, mode, or manner, in or under which the same is or may
be used or practically carried into effect, we would observe in conclusion that we
wish it to be understood that we do not limit ourselves to the precise mechanical
details hereinbefore described and illustrated in the accompanying Drawings, as
the same may be varied without departing from the nature of our Invention; but
what we consider to be novel and original, and therefore claim as the Invention
secured to us by the herein before in part recited Letters Patent is,―
First. The combination with sewing machines of an inclined surface or surfaces.
and a stop or stops so arranged as to be capable of being brought into position for
causing the disengagement of the driving attachment of the balance wheel and
driving shaft at a particular point or particular points of the revolution of the said
shaft, essentially as hereinbefore described with reference to Figures 1 to 7 of the
accompanying Drawings.
Second. The improvement in the needle clamps of sewing machines consisting in

page_text: forming the thread guide therein of a combined slot and retaining pin, essentially
as hereinbefore described with reference to Figures 8 and 9 of the accompanying
Drawings.
Third. In the shuttles of sewing machines connecting one arm of the U shaped
bar by a yielding connection with the side of the shuttle to render the said bar
capable of use to give tension to the shuttle thread, essentially as hereinbefore
described with reference to Figures 10 and 11 of the accompanying Drawings.
Fourth. The general arrangement and combination of parts constituting the
winder for sewing machines herein before described with reference to Figures 12
to 17 of the accompanying Drawings.
Fifth. The combination with winders for sewing machines of the tension
plates w and w² provided with an antifriction wheel w drawn up against its
guide rod or bar q by the tension of the thread being wound, essentially as
hereinbefore described and illustrated in Figures 12 and 14 of the accompanying
Drawings.
Sixth. The combination with winders for sewing machines of the presser plate ?²,
trip-off plates, and retaining pin t for retaining the winder in position, to be
driven by contact with the balance wheel until the requisite quantity of thread has
been wound, and then for causing the releasing of the said winder from such
contact, essentially as hereinbefore described with reference to Figures 12 to 17 of*
the accompanying Drawings.
Seventh. The employment with winders for sewing machines of the spring
collar forming a combined spool driver and thread hook or holding piece,
essentially as hereinbefore described and illustrated in Figures 12, 13, 14, and 15
of the accompanying Drawings.
In witness whereof, I, the said George Browning, have hereunto set my
hand and seal, this Thirteenth day of August, in the year of our Lord One
thousand eight hundred and eighty one.
GEORGE BROWNING. (L.S.)