Improvements relating to Sewing Machines.
Year: 1890

page_text: Date of Application, 7th Jan., 1890
Complete Specification Left, 7th Oct., 1890-Accepted, 22nd Nov., 1890
PROVISIONAL SPECIFICATION.
[Communicated from abroad by THE SEAM MACHINE COMPANY, of 199, Washington
Street, Boston, Massachusetts, United States of America.]
Improvements relating to Sewing Machines.
I, HENRY HARRIS LAKE of the firm of Haseltine Lake & Co., Patent Agents,
Southampton Buildings, in the County of Middlesex, do hereby declare the nature of
this invention to be as follows:-
This invention relates to sewing machines certain portions of the invention relating
especially to the feeding mechanism while other portions relate to the stitch forming
mechanism being applicable to machines of that class in which an enchained or looped
stitch is made by means of an eye-pointed needle and looper, the machine being
adapted for operating with waxed as well as with dry thread.
The invention so far as pertains to the stitch forming mechanism relates mainly to
the looper or device that engages the loop or thread extending from the fabric to the
eye of the needle, an holds the same while the needle is being withdrawn and again
passed through the fabric or material being sewn, and into the loop thus held by the
looper, which latter is then with drawn leaving the loop previously held by it around
the shank of the needle, and is then again carried forward to engage the new loop
extending from the material to the eye of the needle below the loop previously held
by the looper.
In chain stitch sewing machines having a vibrating or reciprocating looper as
generally made, the forward movement of the looper into the new loop is in the same
path as the rearward movement, out from the previously held loop, and in such
construction and mode of operation there is danger that the looper in coming forward
to engage the new loop will catch again in the old loop, and prevent it from being
drawn up properly to make the stitch.
One object of the present invention is to overcome this objection and this portion of
the invention con-ists mainly in the means for operating the looper in such manner
that it advances to engage the new loop in a different path from that which it followed
in leaving the old loop, the said looper having in addition to its vibrating or recipro-
cating movement into and out from the loop, also a lateral motion which takes place
just after it leaves the old loop and before it enters the new loop, said lateral motion
being in a vertical plane and the looper moving forward to engage the new loop
at a lower level than that at which it leaves the old loop around the shank of
the needle.
In the construction herein described the looper is a curved hook or finger and is
pivoted on an axis about which it oscillates in its vibratory endwise movement towards
and from the needle; and the said pivot is itself supported on a slide bar having a
reciprocating movement by which the entire looper is moved bodily in its plane of
vibratory or oscillating movement.
The looper hook occupies but little space in a direction at right angles to the seam
in the material being sewed, and a number of said looper hooks may be mounted side
by side on a single pivoted carrying block so that all will partake of the same move-
ment, each cooperating with a corresponding needle, a number of which needles may
be carried by a single needle bar for the purpose of sewing two or more paralled seams
simultaneously.
The invention also relates to the feeding mechanism and is applicable to any
machine in which the work is fed by a feeding device or dog engaging one
side of the work which is held between the feed movements by a presser foot
or clamp.
In accordance with the present invention an auxiliary presser foot or clamp is

page_text: provided to engage the opposite surface of the work from that engaged by the feed
dog during the feeding movements the said foot being laterally movable with the
feed dog so that all parts of the work or fabric are carried along uniformly instead of
having the upper surface or layer drag backward as occurs when the feed dog
operates to push or slide the work along the surface of the presser foot.
The auxiliary foot is operated with the usual presser foot by means of a lever
operated by any convenient part of the sewing mechanism and having its movement
properly time with relation to the movement of the needle and feed so that when the
feed movement takes place the presser foot is raised and the auxiliary feed pressed
against the fabric and at the end of the feed the auxiliary foot is raised and the main
presser foot is pressed against the fabric holding the same while being pierced by the
needle.
The auxiliary presser foot is free to move laterally in the direction of the feed and
is acted upon by a spring which moves it back in the direction opposite the feed to
its starting point during the time that the main presser foot is holding the work
stationary.
The invention is embodied in a machine having a main shaft above the plate or
work support and a cam shaft below the said work support, the said shafts being
connected to rotate simultaneously and operate the stitch forming devices above and
below the fabric, respectively.
The stitch forming parts operated by the shaft above the fabric may all be of
usual construction, the said shaft being connected by a crank and pitman or other-
wise with the needle bar which may carry one or more eye-pointed needles, in the
usual manner, forcing the needle down and carrying its point below the fabric and
then withdrawing the needle until its point is some distance above the fabric, at each
rotation of the said shaft.
The main presser foot and feeding devices may be also of any suitable construc-
tion, the latter being arranged as a dog formed at the end of a bar connected at its
lower end with a crank or eccentric on the cam shaft the said bar working in a
guide which is adjustable along the bar, the upper end of which thus has a lateral
and vertical movement produced by the rotary movement of its lower end, and the
amount of lateral movement depending on the position of its guide which is adjust-
able up and down the bar for the purpose of shortening or lengthening the feed, as
will be readily understood.
In order to prevent retardation of the upper surface of the material being sewn, by
the pressure of the presser foot upon it during the feed movement, the machine is
provided with an auxiliary presser foot the lower end of which may be somewhat
roughened or serrated to engage the fabric, and may work in an opening in the main
presser foot.
The said auxiliary presser foot is pivoted at its upper end upon a cross bar or lever
which is also pivotally connected with the shank of the main presser foot and
provided with an arm connected by a link with a swinging arm acted upon by a cam
on the main shaft.
While the auxiliary presser foot is free to swing on its pivot in the line of feed it
is acted upon by a light spring tending to move it in the direction opposite to
the feed.
The operation of these parts is as follows:-
At the time when the feed of the fabric is to take place the cam swings the arm in
such manner that the latter acting through a link upon another arm causes the cross
bar to act as a lever fulcrumed on its joint with the auxiliary foot which is thereby
pressed down against the fabric while the main presser foot is lifted by the lever action
of the bar from the fabric.
The auxiliary foot is thus held against the fabric by the action of the spring of the
main presser foot, the force of which is transmitted through the connecting bar and
the auxiliary foot clamps the work against the feed dog and accompanies the same in
the feed movement, so that no retarding effect is produced on the upper surface of the
fabric as is the case when the feed dog pushes the fabric along the surface of the foot.

page_text: At the end of the feed movement the cam passes to such position as to permit the
arm to tilt in the other direction lowering the main presser foot until it comes
upon the fabric and finally lifting the auxiliary presser foot off from the fabric so
that it returns to its original or normal position under the action of the spring
ready to engage the fabric and accompany it and the feed dog in the next feed
movement.
This part of the invention is not limited to the specific arrangement of the connecting
bar and the devices for rocking it as these parts may be varied to suit the other
mechanism of the machine it being essential only that the laterally movable auxiliary
foot should he pressed down and the main foot raised during the feeding movement,
and the main foot depressed to clamp the fabric and the auxiliary foot raised and
returned to its original position during the interval between two feed movements,
while the needle is passing into and out of the fabric.
The looper consists of a curved hook or finger the end of which is made very thin,
and passes close by the side of the needle when the latter is projected downward below
the under surface of the fabric while the shank of the said looper is thicker or wider
than its point and thus spreads the loop open when around the shank so that the
needle will pass through the loop held on the looper when the needle descends while
the looper is moving backward from its forward position.
The said looper hook is supported on a block upon the slide bar working in its
guide upon the framework of the sewing machine, and the said looper block is
oscillated upon its pivot so as to throw the looper finger forward towards the middle
and back from the needle by means of a pitman connected with the said block at one
side of its pivot and also connected with a slide bar that works in a guide groove the
said slide bar being provided with a cam roller or projection working in a cam groove
in a cam disk on the shaft.
Assuming that the slide bar were stationary or that the pivot were stationary in the
framework of the machine the cam groove in connection with the slide bar and
pitman would give the looper finger an oscillating movement at each rotation of the
inain shaft, by which its point would be thrown forward into the loop of thread
extending from the eye of the needle to the fabric just as the neelle was rising, and
thus tending to open the said loop which would remain held by the lopper until
the needle again descended and passed through the loop thus held by the looper, which
would immediately after the needle ha passed through the loop be vibrated back
out of said loop and leave it around the shank of the needle and would then be
vibrated forward again just as the needle began to rise so as to engage the new loop
at the eye of the needle as before described.
The cam groove and intermediate devices between it and the looper do in fact give
it substantially the movements just described, but in addition to such oscillating or
endwise movement of the looper around the pivot the said pivot itself is also given
a reciprocating movement by means of a cam projection or roller working in a cam
groove being so shaped and arranged with relation to the groove which vibrates
the looper that the said pivot descends in the interval between the backward and
forward movements of the looper so that its forward movement is made at a lower
level, than its backward movement or in other words it enters the new loop below the
point at which it left the old loop.
The cam then causes the pivot to rise gradually while the looper is coming to and
remains in its forward position during which time the needle is being withdrawn from
the fabric and the last loop is being drawn up so that when the needle again enters
the fabric the looper will be in its higher position and the loop, which is at all times
held tightly by it, will be left by it around the shank of the needle, at such point that
when the looper again advances at the lower level it is impossible for it to engage the
loop previously cast off from it as might take place if the looper advanced and receded
in the same path.
If desired the looper block might carry a number of different looper hooks
cooperating with a number of different needles to form several seams or lines of
stitching simultaneously, and when two such seams are to be placed very near

page_text: together, the looper projections will be made right and left handed with relation to
one another and their thin points will be adjacent to one another, so as to require but
very small space between the needles.
The relative positions of the needle and the looper hook in the process of forming
the stitch are hereinafter described the cam being for this purpose divided into
sections 1, 2, 3, 4, and 5..
The substantially concentric portions of the cam grooves in the cam plate included
in section 1 in passing the cam rollers retain the pivot of the looper in its highest
position, and the looper finger in its forward position, during the greater part of the
rise and descent of the needle while its point is above the fabric. In the latter part
of the descent of the needle the portion of the cam groove included in section 2 throws
the looper back to its highest position just as the point of the needle passes through
and below the fabric and thus enters within the loop on the looper.
During this part of the movement the cam groove has not changed the position of
the pivot. Then while the portion of the cams included in section 3 passes over the
cam rollers. the slide bar and pivot will be drawn down, but the pitman will be drawn
down much more rapidly so that the looper will continue to lie oscillated from its
highest position backward while at the same time the pivot will have descended so
that in addition to the end wise backward movement of the looper hook, it also has
a hodily or lateral downward movement.
Then in the portion of the cam included in section 4 the one groove will have
thrown the looper forward while the other groove will have produced but slight if any
change in the position of the looper pivot such movement projecting the point of the
hook into the loop of thread which is then being formed by the beginning of the rise
of the needle after which the portion of the cam grooves included in section 5 will
cause the pivot to rise but will cause the pitman to rise more rapidly so that the looper
hook will have a bodily lateral upward movement simultaneous with its endwise forward
vibrating or oscillating movement by which it is again brought to the position from
which it started.
It is obvious that the mechanical construction of the looper and its operating
devices may be widely varied while retaining substantially the same mode of
operation and various other devices might be substituted for the specific ones
described. for giving the looper the movements described with relation to the needle.
The pivot practically constitutes a guide which determines the path of the recipro-
cating or vibrating movement of the looper, and the said guide instead of being
stationary as heretofore practised, is itself made movable so that the path of movement
of the looper is shitted with relation to the framework of the machine during the said
movement of the looper on its guide.
In a modification in which a similar result is attained, the cam for the slide bar is
dispensed with and the said slide bar has a slight frictional resistance to its movement and
the pivotal movement of the looper block thereon, is limited by suitable stops. By this
construction a single cam groove that acts on the pitman or equivalent connection
with the looper block gives the latter both of its movements first rocking the same
forward on its pivot until such rocking movement is arrested by the stop, when the
further upward movement of the pituran will cause the end wise upward movement of
the slide bar, which will remain in its uppermost position until the looper is moved
back until arrested by the stop, after which a further downward movement of the
pitman will cause the slide bar to move downwards so that the end wise and lateral
movements of the looper will alternate with one another.
It is considered preferable to move both the looper block and its guide separately
and positively as herein shown, and so that the lateral movement may in part accom-
pany the endwise movement instead of having one movement wholly finished before
the other begins.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements relating to Sewing Machines.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
45 Southampton Buildings, in the County of Middlesex, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
--
This invention relates to sewing machines certain portions of the invention relating
especially to the feeding mechanism while other portions relate to the stitch forming
mechanism being applicable to machines of the class in which an enchained or looped
stitch is made by means of an eye-pointed needle and looper, the machine being
adapted for operating with waxed as well as with dry thread.
The invention so far as pertains to the stitch forming mechanism relates mainly to
the looper or device that engages the loop of thread extending from the fabric to
the eye of the needle and holds the same while the needle is being withdrawn and
again passed through the fabric or material being sewn, and into the loop thus held
by the looper which latter is then withdrawn leaving the loop previously held by it
around the shank of the need'e, and is then again carried forward to engage the new
loop extending from the material to the eye of the needle below the loop previously
held by the looper.
In chain stitch sewing machines baving a vibrating or reciprocating looper as
generally made, the forward movement of the looper into the new loop is in the same
path as the rearward movement, out from the previously held loop, and in such con-
struction and mole of operation there is danger that the looper in coming forward to
engage the new loop will catch again in the old loop, and prevent it from being drawn
up properly to make the stitch.
One object of the present invention is to overcome this objection and this portion
of the invention consists mainly in the means for operating the looper in such manner
that it advances to engage the new loop in a different path from that which it followed
in leaving the old loop, the said looper having in a Idition to its vibrating or recipro-
cating movement into and out from the loop, also a lateral motion which takes place
just after it leaves the old loop and before it enters the new loop, said lateral motion
being as shown in this instance in a vertical plane and the looper moving forward to
engage the new loop, at a lower level than that at which it leaves the old loop around
the shank of the needle.
In the construction shown in this instance the looper is a curved hook or finger
and is pivoted on an axis about which it oscillates in its vibratory endwise movement
towards and from the needle; and the said pivot is itself supported on a slide bar
having a reciprocating movement by which the entire looper is moved bodily in its
plane of vibratory or oscillating movement.
The looper hook occupies but little space in a direction at right angles to the seam
in the material being sewed and a number of said looper hooks may be mounted side
by side on a single pivoted carrying block, so that all will partake of the same move-
ment, each co-operating with a corresponding needle, a number of which needles
may be carried by a single needle bar for the purpose of sewing two or more parallel
seams simultaneously.
The invention also relates to the feeding mechanism and is applicable to any
machines in which the work is fed by a feeding device or dog engaging one side
of the work which is held between the feed movements by a presser foot or clamp.
In accordance with the present invention an auxiliary presser foot or clamp is
provided to engage the opposite surface of the work from that engaged by the feed
dog during the feeding movements the said foot being laterally movable with the feed
dog so that all parts of the work or fabric are carried along uniformly instead of
having the upper surface or layer drag backward as occurs when the feed dog
operates to push or slide the work along the surface of the presser foot.
The auxiliary. feed is connected with the usaal presser foot by means of a lever

page_text: operated by any convenient part of the sewing mechanism, and having its movement
properly timed with relation to the movement of the needle and feed so that when the
feed movement takes place the presser foot is raised and the auxiliary foot pressed against
the fabric and at the end of the feed the auxiliary foot is raised and the main presser foot
is pressed against the fabric holding the same while being pierced by the needle.
The auxiliary presser foot is free to move laterally in the direction of the feed and
is acted upon by a spring which moves it back, in the direction opposite the feed,
to its starting point during the time that the main presser foot is holding the work
stationary.
In the accompanying drawings,
Figure 1 is a front elevation showing the main operative parts of a sewing machine
embodying this invention.
Figure 2 is a similar elevation with the feed mechanism removed in order to show
more clearly the looper and its operating mechanism.
Figures 3 to 8 inclusive are detail views showing the relative position of the needle
at different points in the operation of making the stitch.
Figures 9 and 10 show modifications hereinafter referred to, and
Figures 11 and 12 show details of the feed mechanism also hereinafter referred to.
The invention is embodied in a machine having a main shaft a above the plate or
work support b, and a cam shaft c below the said work support, the said shafts a and c
being connected to rotate simultaneously and operate the stitch forming devices above
and below the fabric, respectively.
The stitch forming parts operated by the shaft above the fabric may all be of
usual construction, the said shaft being connected by a crank and pitman or otherwise
with the needle bar d which may carry one or more eye-pointed needles e in the usual
manner, forcing the needle down and carrying its point below the fabric and then
withdrawing the needle until its point is some distance above the fabric, at each
rotation of the said shaft.
The main presser foot fand feeding devices 9 may be also of any suitable con-
struction, the latter being shown as a dog formed at the end of a bar connected at
its lower end with a crank or excentric g³, on the shaft c, the said bar working
in a guide g which is adjustable along the bar, the upper end of which thus has a
lateral and vertical movement produced by the rotary movement of its lower end,
and the amount of lateral movement depending on the position of its guide of which
is adjustable up and down the bar g² for the purpose of shortening or lengthening
the feed, as will be readily understood.
In order to prevent retardation of the upper surface of the material being sewn,
by the pressure of the presser foot f upon it during the feed movement. the machine
is provided with an auxiliary presser foot 2, the lower end of which may be
soniewhat roughened or serrated to engage the fabric, and may work in an opening
in the main presser foot, as shown in Fig. 12.
The said auxiliary presser foot is pivoted at its upper end upon a cross bar or lever f³
which is also pivotally connected with the shank of the main presser foot and provided
with an arm connected by a link f5 with a swinging arm f acted upon by a
cam on the main shaft a." While the foot 2 is free to swing on its pivot in
the line of feed it is acted upon by a light spring / tending to move it in the
direction opposite to the feed.
The operation of these parts is as follows:-
3
At the time when the feed of the fabric is to take place the cam f' swings the arm fo
in such manner that the latter acting through the link upon the arm causes the
cross bar to act asa lever fulcrumed on its joint with the foot 12 which is thereby
pressed down against the fabric while the main presser foot fis lifted by the lever
action of the bar f³ from the fabric.
The auxiliary foot is thus held against the fabric by the action of the spring f 10 of
the main presser foot, the force of which is transmitted through the connecting bar
and the auxiliary foot clamps the work against the feed dog g and accompanies the
same in the feed movement, so that no retarding effect is produced on the upper

page_text: surface of the fabric as is the case when the feed dog pushes the fabric along the
surface of the foot.
At the end of the feed movement the cam f7 passes to such position as to permit the
arm to tilt in the other direction lowering the main presser foot f until it comes
upon the fabric and finally lifting the auxiliary presser fout off from the fabric so that
it returns to its original or normal position under the action of the spring ready to
engage the fabric and accompany it and the feed dog in the next feed movement.
This part of the invention is not limited to the specific arrangement of the con-
necting bar and devices for rocking it as these parts may be varied to suit the otner
mechanism of the machine it being essential only that the laterally movable auxiliary
foot should be pressed down and the main foot raised during the feeding movement,
and the main foot depressed to clamp the fabric and the auxiliary foot raised and
returned to its original position during the interval between two feed movements,
while the needle is passing into and out of the fabric.
The looper consists of a curved hook or finger the end of which is made very
thin, and passes close by the side of the needle when the latter is projected downward
below the under surface of the fabric while the sbank of the said looper is thicker or
wider than its point, and thus spreads the loop open when around the shank so that the
needle will pass through the loop held on the looper when the needle
descends while the looper is moving backward from its forward position as shown, in
Figures 4, 5 and 6.
The said looper hook is supported on a block i upon the slide bar k working in its
guide upon the frame work of the sewing machine, and the said looper block is
oscillated upon its pivot so as to throw the looper finger forward towards the middle
and back from the needle, by means of a pitman m connected with the said block i at
one side of its pivot and also connected with a slide bar n that works in a guide groove
in the slide bark the said slide bar n being provided with a cam roller or projection n²
working in a cam groove o in a cam disc p on the shaft c.
Assuming that the slide bark were stationary or that the pivot 2 were stationary
in the frame work of the machine, the cam groove o in connection with the slide bar n
and pitman m would give the looper finger an oscillating movement at each rotation
of the main shaft, by which its point would be thrown forward into the loop of
thread extending from the eye of the needle to the fabric just as the needle was rising,
and thus tending to open the said loop which would remain held by the looper until
the needle again descended and passed through the loop thus held by the looper, which
would immediately after the needle has passed through the loop be vibrated back out
of said loop and leave it around the shank of the needle and would then be vibrated
forward again just as the needle began to rise so as to engage the new loop at the eye
of the needle as before described..
The cam groove o and intermediate devices between it and the looper do in fact give
it substantially the movements just described, but in addition to such oscillating or
endwise movement of the looper h around the pivot the said pivot itself is also given
a reciprocating movement by means of a cam projection or roller ³ working in a cam
groove o² being so shaped and arranged with relation to the groove o which vibrates
the looper that the said pivot descends in the interval between the backward and
forward movements of the looper so that its forward movement is made at a lower
level than its backward movement or in other words it enters the new loop as shown
in Figure 8 below the point at which it left the old loop as shown in Figure 6.
The cam o² then causes the pivot 2 to rise gradually while the looper is coming to
and remains in its forward position during which time the needle is being withdrawn
from the fabric and the last loop is being drawn up so that when the needle again enters
the fabric the looper will be in its higher position and the loop, which is at all times
held tightly by it, will be left by it around the shank of the needle, at such point
that when the looper again advances at the lower level it is impossible for it to engage
the loop previously cast off from it as might take place if the looper advanced and
receded in the same path.
If desired the looper block i might carry a number of different looper hooks as

page_text: shown in Figure 9, co-operating with a number of different needles to form several
seams or lines of stitching simultaneously, and when two such seams are to be placed
very near together, the looper projections will be made right and left handed with
relation to one another as shown in Figure 9, and their thin points will be adjacent
to one another, so as to require but very small space between the needles.
The relative positions of the needle and the looper hook in the process of forming
the stitch are illustrated in Figures 3 to 8 inclusive.
The substantially concentric portions of the cam grooves in the cam plate p between
the radial lines 2 and 3 thereof, see Figure 1, in passing the cam rollers retain the
pivot of the looper in the highest position, and the looper finger in its forward
position, as shown in Figure 3, during the greater part of the rise and descent of the
needle while its point is above the fabric. In the latter part of the descent of the
needle the portion of the cam groove o between the lines 3 and 4, throws the looper
back to the position shown in Figure 4, just as the point of the needle passes through
and below the fabric and thus enters within the loop as shown in Figures 4 and 5,
the latter showing a plan view of the looper hook and section of the needle.
During this part of the movement the cam groove o² has not changed the position
and 6 passes
of the pivot 2. Then while the portion of the cams between the lines
over the cam rollers, the slide bark and pivot 2 will be drawn down, but the pitman m
will be drawn down much more rapidly so that the looper will continue to be oscillated
back from the position shown in Figure 4, to the position shown in Figure 6 and then
to that shown in Figure 7, while at the same time the pivot i will have descended so
that in addition to the endwise backward movement of the looper hook, it also has a
bodily or lateral downward movement.
Then in the portion of the cam between the lines 6 and 8, the groove o will have
thrown the looper forward while the groove o² will have produced but slight if any
change in the position of the looper pivot such movement projecting the point of
the hook into the loop of thread which is then being formed by the beginning of the
rise of the needle as will be understood from Figure 8, after which the portion of
the cam grooves between the lines 8 and 2, will cause the pivot 2 to rise but will
cause the pitman m to rise more rapidly so that the looper hook will have a bolily
lateral upward movement simultaneous with its endwise forward vibrating or
oscillating movement by which it is again brought to the position shown in
Figure 3.
It is obvious that the mechanical construction of the looper and its operating
devices may be widely varied while retaining substantially the same mode of
operation and various other devices might be substituted for the specific ones
shown, for giving the looper the movements described with relation to the
needle.
The pivot practically constitutes a guide which determines the path of the
reciprocating or vibrating movement of the looper, and the said guide instead
of being stationary as heretofore practised, is itself made movable so that the path
of movement of the looper is shifted with relation to the frame work of the machine
during the said movement of the looper on its guide.
Figure 10 represents a mechanical modification by which a similar result is
attained.
In this case the cam o² for the slide bar k is dispensed with and the said slide-bar
has a slight frictional resistance to its movement and the pivotal movement of the
looper block thereon is limited by suitable stops. By this construction a single
cam groove that acts on the pitman m or equivalent connection with the looper block
gives the latter both of its movements first rocking the same forward on its pivot
until such rocking movement is arrested by the upper stop, when the further upward
movement of the pitman will cause the endwise upward movement of the slide bar,
which will remain in its uppermost position until the looper is moved back until
arrested by the stop, after which a further downward movement of the pitman will
cause the slide bar to move downwards, so that the endwise and lateral movements of
the looper will alternate with one another.

page_text: It is considered preferable to move both the looper block and its guide separately
and positively as herein shown, and so that the lateral movement may in part
accompany the end wise movement instead of having one movement whole finished
before the other begins.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, as communicated to me by my
foreign correspondent I declare that what I claim is :-
:―
First. In a sewing machine the combination of a reciprocating eye pointed needle
and work support; with a vibrating loop holding finger at the opposite side of said
work support from that at which the needle enters the work; said loop holding finger
having a thin point portion and wider shank portion; a supporting guide on which
said loop holding finger vibrates said guide being movable substantially in line with
the needle; and two cam surfaces one cooperating with and vibrating the said loop
holding finger and the other cooperating with and reciprocating its supporting guide,
substantially as described.
Second. The combination of a reciprocating eye-pointed needle and work support,
with the loop holding finger at the opposite side of said work support from that at
which the needle enters the work, said loop holding finger having a thin point portion
and wider shank portion; a pivoted carrying block for said loop holding finger,
and a reciprocating slide bar upon which said block is pivoted, substantially as
described.
Third. The combination of a reciprocating needle bar and two or more eye-
pointed needles carried thereby, with a pivoted looper block and two or more
loop holding fingers supported thereon each of said fingers having a thin point
portion, substantially in line with one side of the shank portion, said point portions
on two adjacent fingers being at opposite sides of the shank portion respectively,
substantially as and for the purpose set forth.
Fourth. The combination of the under feeding device having an intermittent feed
movement and the pressure foot or cloth clamp inovable towards and from the fabric
but having no lateral movement with relation thereto, and the auxiliary presser foot
also movable towards and from the fabric, and a spring tending to move the same in
a direction opposite to that of the feed, and a lever actuated by the sewing mechanism
and cooperating with both said presser feet, as described, whereby one presser foot is
raised while the other is depressed upon the fabric the said auxiliary presser foot
being depressed while the under feeding device is making its movement and being
caused to accompany the same by its engagement with the fabric, substantially as
described.
Dated this 7th day of October 1800.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.