IMPROVEMENTS IN SEWING MACHINES
Year: 1866

page_text: LETTERS PATENT to Ira Dimock, of 97, Cheapside, in the City of
London, for the Invention of "IMPROVEMENTS IN SEWING MACHINES."- A
communication from abroad by George Lynden Jencks, residing at
Florence Massachusetts. United States of America.
Sealed the 31st January 1867, and dated the 4th August 1866.
PROVISIONAL SPECIFICATION left by the said Ira Dimock at the
Office of the Commissioners of Patents, with his Petition, on the 4th
August 1866.
I, IRA DIMOCK, of 97, Cheapside, in the City of London, do hereby declare
the nature of the said Invention for "IMPROVEMENTS IN SEWING MACHINES,"
to be as follows:-
This Invention has for its object improvements in sewing machines. At
the end of an axis, carried in suitable bearings and driven from a treadle or
otherwise, is a crank pin, which by a connecting rod gives a to-and-fro motion
to a rack sliding horizontally in guides on the frame; this rack gears with a
pinion on a vertical axis, which in this way is caused to make something less
than a complete revolution, first in one direction and then in the other. On
the top of this axis, is a disc or platform on which a bobbin rests, and one side
of the disc or platform is notched or cut in such a manner as to form a hook

page_text: at its edge. The machine is also furnished with an arm mounted on a centre
on the frame, and caused to rock thereon by means of an eccentric on the
main axis, with which it is linked by means of a strap, the joints at both ends
of the strap being on the ball-and-socket construction to admit of this direct
connection being made. The arm actuated in this manner carries at its end
a curved needle, which as the arm oscillates rises and falls, its point passing
in close proximity to the edge of the disc or platform already mentioned; thus
when the machine is at work the needle carries down through the work a
loop of its thread; the needle then slightly rises so as to throw the loop slack,
when immediately it is caught by the hook on the edge of the disc or platform,
which draws out the loop and passes it around the bobbin, one side of the
loop passing under and the other over it. In order to ensure the lower limb
of the loop being kept down sufficiently to pass under the bobbin there is a
nib on the frame which catches it, and from which it does not escape until
the hook has made half of its revolution or thereabout, and to prevent this
thread passing under or hanging on the edge of the disc or platform in place
of passing under it, as is required, the edge of the disc or platform immediately
behind the hook is bevilled or inclined: The bobbin consists of a small metal
pan, the sides of which incline from the bottom inwards to help the upper limb
of the loop to pass over it; this pan has a stud in its centre, on which a metal
reel turns freely, and there is an eye in the side of the pan through which the
thread from the reel passes out, and a spring gives to it the necessary tension.
To keep the bobbin in its place on the disc or platform, and to prevent it
lifting with the tension of the thread, a centre pin is caused to enter a recess
in the top of the stud in the bobbin; this pin is carried by a lever jointed to
the frame, and is kept down by a cam on the axis, which, however, allows
the lever to be raised by a small spring, with which it is fitted just at the
time that the upper limb of the loop of the needle thread has to pass over the
bobbin. In order to pull the loop of the needle thread tight as soon as it
escapes from the needle, and to deliver thread to the needle as it sinks through
the work, a loop of the needle thread as it passes from the tension pulley to
the eye of the needle is caused to pass over a crank pin on the axis, by which
arrangement it will be seen that for half of the revolution the crank pin is.
drawing back the needle thread, and at this time the loop, produced by the
hook is pulled tight, whilst for the other half of the revolution the crank pin
is allowing the needle thread to fall slack, and is supplying thread to let the
needle carry down a loop. The work is fed forward by means of a plate with
teeth at one end rising up through the platform on which the work rests, and
on to which it is pressed by a top plate carried by an arm turning on a centre

page_text: on the frame, a spiral spring applied to the arm at the further side of the
centre throws downwards on to the work its other end which carries the
pressing plate. The tooth feed plate receives a to-and-fro motion from an
eccentric on the main axis; this by a strap is connected with an arm on a
vertical spindle, which is thus caused partially to rotate first one way, then
the other. On the top of this spindle is a cross head, in which is a groove,
and a pin in connection with the toothed feed plate enters the groove; this
pin is adjustable, so that it can be made to stand in any part of the groove;
if it is placed immediately over the centre of the spindle no motion is given
to the toothed feed plate, and the further it is placed from this position the
greater will be the length of the motion of the plate, or, in other words, the
length of the stitch. By causing the pin to pass along the groove from one
side to the other of the centre of the spindle the direction of the feed will be
reversed. The adjustable pin by which the stitch is regulated is mounted on
an arm centered on the feed plate, and by turning this arm on its centre the
pin is set as required. In order to form a gauge for the amount of this
motion a thumbscrew passes up through the arm, and its end projects into a
V notch on the feed plate. The end of the screw is caused to bear against
one side or other of the V notch, and so the amount the screw projects into the
notch regulates the length of the stitch, and the side of the notch against
which it bears regulates its direction. The teeth of the feed plate are kept
up towards the work by a lever on which the plate rests. At the end at which
the teeth are situated this lever is on a horizontal axis, on which is another
lever resting on a cam on the main axis, and this cam at the time for the
return stroke of the feed plate allows the levers to fall, and with it the toothed
end of the feed plate, which thus is prevented taking the work back along
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said. Ira Dimock in the Great Seal Patent Office on the 4th
February 1867,
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, IRA
DIMOCK, of 97, Cheapside, in the City of London, send greeting..
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fourth day of August, in the year of our Lord
One thousand eight hundred and sixty-six, in the thirtieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Ira Dimock, Her special licence that I, the said Ira Dimock, my

page_text: executors, administrators, and assigns, or such others as I, the said Ira
Dimock, my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter during
the term therein expressed, should and lawfully might make, use, exercise,
and vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
SEWING MACHINES," a communication to me from abroad by George Lynden
Jencks, a person resident at Florence, Massachusetts, United States of America,
upon the condition (amongst others) that I, the said Ira Dimock, my
executors or administrators, by an instrument in writing under my, or their,
or one of their hands and seals, should particularly describe and ascertain
the nature of the said Invention, and, in what manner the same was to be
performed, and cause the same to be filed in the Great Seal Patent Office
within six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said Ira Dimock, do hereby declare the
nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement, reference being had to the accompanying Drawings making part
of this Specification, in which Figure 1 is a side elevation and section of the
sewing machine which embodies the said improvements.
Figures 2, 3 and 4 are details of the needle holding parts of the needle
arm herein-after mentioned; Figure 5 is a face view of the cams that
operate the sewing parts also herein-after mentioned; Figure 6 is a plan and
section of the said sewing machine, with the needle arm and the presser arm
broken away, and the plate or cover over the sewing parts removed to afford
an unobstructed view of the said parts; Figure 7 is a face view of the
"tension" device and " take-up" device herein-after mentioned detached;
Figure 8 is a section of the hubs of the said needle arm and the presser
arm shewing the mode of hanging the same herein-after described; Figure 9,
Number 1, is a perspective view of the circular shuttle, Number 2 is a plan,
and Number 3 a section vertically of the same; Figure 10 is a plan and a
vertical section of the bobbin that operates in said shuttle; Figure 11,
Number 1, is a plan of the "cloth bridge" and "bridge ring" detached,
Number 2 is a section vertically of the same, and Number 3 is a plan of
the said bridge detached from the said ring; Figure 12, Number 1, is a
plan of the "semi-rotating interlacing hook" herein-after mentioned, and
Number 2 is a vertical section of the said "hook" and its stem; Figure 13,
No. 1, is a plan, and Number 2 is a perspective view of the pedestal or

page_text: shuttle holder, as herein-after described. All the parts as exhibited in the
Drawings are of the full working size, and similar letters and numbers marked
thereon denote like parts in all the Figures.
The said Invention pertains more particularly to that class of sewing
machines in which the stitch is formed with two interlocking threads by
means of an eye pointed needle and a shuttle and an interlacing hook, and
in which the shuttle is held in one position while the loop of needle thread is
carried around it by the said hook in contradistinction with shooting a flying
shuttle through the said loop for the purpose of interlocking the two threads
to form the stitch, and is calculated to overcome certain difficulties which I
will mentioned.
In the mode described and as hitherto practiced of interlocking the needle
thread with the shuttle thread by means of the interlacing hook the loop of
needle thread after being carried around the shuttle is cast off by the hook
and held by a "pad" (so called) at a certain position until the said hook by
its succeeding movement catches the succeeding loop of needle thread, and by
the continuation of said movement, which carries the last loop around the
shuttle, it "takes up" the first loop and draws it into a stitch against the
cloth. By this method of taking up the preceding loop of needle thread
by the same means and movement which carries the succeeding loop around
the shuttle two consecutive movements of the hook are required to form
each stitch, or, in other words, the stitch instead of being completed by one
cycle of operations of the machine is left incomplete in the form of a loop
that is held by the said pad, and is only completed by a repitition of the
hooks movement during the succeeding cycle of operations, so that at a certain
stage of the operation there are two incomplete loops of needle thread, one
that is held by the said pad and one other in the custody of the hook, by the
joint action of which two instruments that (loop) held by the pad is made to
form a stitch, and if either the pad fails to hold the first loop during the
proper interval for the hook to catch and carry the succeeding loop around
the shuttle the stitch is left unfinished, and the hook by its subsequent
movement is liable to catch and wrest the first loop from the custody of the
pad and subsequently to catch the succeeding loop of needle thread and
carry both around the shuttle, and by so doing entangle the thread beneath
the cloth and stop the operation of the machine, and it will appear therefore
that the pad performs an important function in the formation of the stitch,
and also that the tension of the two threads must be nicely adjusted with
reference to the joint action of the pad and the hook to avoid the occurrence
of these difficulties.

page_text: By the said Invention, however, I have so combined the joint operations
of the hook and shuttle and the needle as to insure the greatest certainty of
catching and carrying the loop of the needle thread around the shuttle, and I
have by dispensing with the said pad or an equivalent altogether and
combining with the said sewing parts an independent "take-up" mechanisin
been enabled to form the loop and complete each stitch therefrom in one
and the same cyle of operations of the machine without depending upon any
succeeding operation.
The first part of this Invention therefore relates to the mode of combining
the hook and shuttle with the "eye pointed needle," and consists in arranging
the hook to rotate horizontally next to the inner curvature of the needle,
which vibrates vertically (at right angles to the plane of the said hook)
through the cloth, so that the loop which is formed in the bend of the
needle will by reason of the said curvature or shape of the needle be held
apart therefrom and across the track of the rotating hook, where it will be
surely caught by the hook and carried around the shuttle which is also
arranged horizontally above the said hook with its thread delivery next to the
needle.
The second part of the Invention relates to the means employed to
complete each stitch in succession, and before the formation of a subsequent
loop of needle thread within one cycle of operations of the machine, and
consists in combining with the book and shuttle and eye pointed needle,
arranged substantially as described, an independent "take-up" mechanism
for taking up the loop of needle thread after it is carried around the shuttle
and cast off from the hook, and during the interval of time occupied by the
return of the hook to the position whence it started to catch said loop.
The third part of the Invention relates to the means employed to take up
the slackness of the loop of needle thread as described independently of the
means and mode of operation employed to carry the said loop around the
shuttle, and consists of a plain stud or rod in a revolving face plate, arranged
(if convenient) on the driving shaft and between the device employed to
regulate the tension of the needle thread and a guide eye from which the
thread passes to the needle, so that when the needle thread would become
slack from passing from around the shuttle the said stud by revolving
against the thread between the two points of confinement above mentioned
will form a loop by the thread passing around it, and by so doing draw the
thread through the needle's eye and the intermediate guides sufficiently to
produce the stitch in the cloth.
The fourth part of the Invention relates to the mode of constructing the

page_text: shuttle and its appendages which carries and delivers the bobbin of shuttle
thread, and consists in making the said shuttle in a circular or elliptical form,
and with a bevilled edge to facilitate the passage of the same through the
loop of needle thread and a circular recess within the bevilled edge for the
reception of the said bobbin, and in combination with such shuttle a notch in
the bevilled edge for the delivery of the thread from the bobbin, and a spring
presser on the bevilled edge formed with a delivery eye at its free end, and
in a position at one side of the notch in the bevilled edge for the purpose of
producing the requisite tension of the shuttle thread as it is delivered.
The fifth part of the Invention relates to the mode of holding and controlling
the action of the said shuttle, and consists in holding or supporting the
shuttle upon a stationary plate or pedestal within the circle that is traversed
by the rotating interlacing hook, and just above the latter, for the purpose of
holding the shuttle in one position with its thread delivery next to the needle,
and in maintaining said shuttle in its central position against the face of the
loop of needle thread in passing around the extreme point of its diameter by
means of a tilting bar or its equivalent with a conical protuberence or centre
near its end, which enters the female centre in the middle of the shuttle when
the bar which is pivoted to one side of the shuttle frame is tilted down by
suitable means applied to the opposite end for the purpose of holding the
shuttle down in its place as specified during the passage of the loop of needle
thread around the shuttle, and except when the bar is required to lift from
contact with the shuttle and permit the loop to pass and be drawn up to form
the stitch.
The Invention also further relates to the mode of hanging and adjusting
the needle arm and the "presser arm," so called, and to the contruction
and arrangement of the "cloth bridge," and its appendages, with the afore-
mentioned sewing parts, and to the mode of securing the needle to the needle
arm, all which is herein-after more particularly described.
.
To enable others skilled in the art to make and use the said Invention I will
proceed to describe the same. In the said Drawings Fis the cast-iron frame-
work or bed on which the several devices constituting my improved machine are
arranged, and motion is communicated to the, several parts from the driving
shaft B, Figures 1 and 6, extending lengthwise through the centre of the frame,
and driven by a band passing over the groove pulley X at the rear; N is the
needle arm carrying the curved eye pointed needle n at its free end, and P
is the presser arm carrying the presser a at its free, end, both of said arms
being pivoted at H to the frame in a manner more particularly described
hereafter, the needle arm N receiving a vibrating movement vertically by
4

page_text: means of an excentric A, Figures 1, 6, and 7, on the shaft B, connected by
its strap A¹ in a ball-and-socket joint to the end of the short arm that extends
from the hub of the needle arm; T is the device which regulates the tension
of the needle thread, and e³, 63, 63, are the guide eyes through which the
thread is conducted to the point of the needle n; f is the "feed bar" which
is arranged to feed the cloth in either direction to the needle; this feed bar is
operated by the reversible rocker arm 18, in the curved groove of which a
stud on the swinging arm c is made to communicate motion to the feed bar,
such motion being derived from the excentric 20, Figures 1, 6, and 5, and
imparted to the rocker shaft through the strap 21, and its curved rod and
suitable connections 22 and the arm 23 in the lower end of said rocker shaft.
All the parts thus far mentioned are common and well known to those who
are acquainted with sewing machinery and except of what may be so specified
to the contrary hereafter form no part of the said Invention.
The sewing parts and their peculiar arrangement, which constitutes the first
part of my Invention, are exhibited in Figures 1, 6, 9, 10, 12, and 13, in
which m is the interlacing hook on a hollow vertical stem 18 having a suitable
bearing in which the stem rotates in the framework D by means of the
pinion gear S on the stem, and a rack R meshing with said pinion and
sliding in the said frame by motion communicated through the connection b
from the crank pin g on the end of the driving shaft B, whereby sufficient
movement is obtained to impart by means of the said rack and pinion about
seven-eighths of a revolution to the interlacing hook in a forward direction,
and to return the same during one complete revolution of the driving shaft B.
The arrangement of the hook and shuttle with the curved eye pointed needle
is shewn in Figures 1 and 6, the needle n being held in its arm in a similar
position to that of curved needles in other machines, the eye of the needle,
however, opening from the front of the machine, or in the direction of the
length of the needle arm instead of laterally or crosswise, as when the hook
and shuttle are arranged on one side of the said needle and the hook m and
shuttle h are arranged horizontally with the movement of the needle n, and
next to at the rear of the needle, the axis of the hook and shuttle being
directly opposite the needle in a radial line with the axis of the needle arm,
so that the loop of thread which forms in the inner curvature or side of the
needle, on which said hook operates, has a tendency to stand out and apart
from the needle in consequence of the needle's concavity on this side, and by
arranging and operating the hook with the said concavity of the needle the
loop of needle is more certain of being caught by the action of the hook and
its operation, and subsequent operations, depending thereon are rendered

page_text: more nearly positive than heretofore. The hook m rotates on its stem 13
in vertical bearings formed in the frame D from the position with reference
to the needle n, as shewn in Figure 12, pass the needle, from which it catches
the loop of needle thread presented to it on the inner curve of the needle as
seen in Figure 1, which it carries around the shuttle to the position shewn
by red lines, Figure 6, and until it has reached the point marked e²,
Figure 12, when the loop of needle thread is cast off and the hook returns
preparatory to repeating its said movement of catching the succeeding loop,
during which time of returning the cast off loop is taken up and drawn with
the requisite tension into the cloth by means of a separate and independent
mechanism which draws the thread quickly through the needle's eye, when the
loop is cast off, and thus completes the stitch during one cycle of operations of
the machine. The said mechanism for taking up the loop of needle thread
to complete the stitch is shewn in Figures 1, 6, and 7, in which the thread k
is shewn passing from the spool through the guide eyes, and around the
friction bobbin T of the tension mechanism, thence under and around the
stud V in the face of the driving pulley X, and through the guide eye e' on
the opposite arm of the stand Cs from the tension device, and thence it
passes through the guides es, e³, on the needle arm to the point of the needle
in the usual way. By means of this arrangement of parts when the loop is
cast off the needle has lifted out of the cloth, and the stud V which is to
take up the loop is in the position shewn by dotted lines in Figure 7, and
in full lines Figure 1, and by continuing the movement of the machine the
stud V is carried round to the position shewn in full lines in Figure 7,
drawing the thread around it in the form of a loop, and thereby taking up
the slackness created by the passage of a loop of the thread around the shuttle
as described.
The shuttle and its appendages for producing tension for carrying and
delivering the under or shuttle thread are constructed, as shewn in. Figure 9,
in the form of a circular piece with a bevilled edge p and a circular recess in
the upper face for the reception of the bobbin E, Figure 10, which turns on
a hollow centre pind of the shuttle. The shuttle's edge is bevilled inwards
or towards its centre from the bottom or under side, upon which it rests for
the purpose of enabling the uppermost of two threads of the loop when it
meets the edge of the shuttle in being carried around it, as before explained,
to pass upward over the shuttle while the under or other thread of the loop is
carried in a direct line from the position of the needle's eye when it is caught
therefrom beneath the shuttle; this bevelled edge of the shuttle and a similar

page_text: edge on the hook disc, considering the arrangement of the sewing parts greatly
facilitating the proper disposition of the loop of needle thread around the
shuttle, and the final completion of the stitch in the period of time allotted
therefor. The thread passes from the bobbin in the shuttle through a small
notch t cut in the bevilled edge, as shewn clearly in Figure 9, Number 1, and
the tension of this thread is regulated as it is delivered by means of the slight
spring presser 8, one end of which is rivetted to the outer surface of the bevilled
edge, and the free end of said spring extends over and past the delivery notch t,
and is provided with a similar notch or delivery guide, from which the thread
passes immediately to the cloth. By this arrangement of a spring presser
and delivery notch in the shuttle the thread is made to deviate from its direct
course, and two bights or turns are formed in the thread which produces a
tension which is tempered and regulated by the yielding action of the free
end of the spring from which the thread finally is delivered. The said shuttle
is held and its action controlled to a certain extent by means of the stationary
disc or pedestal G on which it rests, and the tilting bar or finger which keeps
it in its central position; this pedestal consists of a circular plate with a long
stem ; extending from its centre on one side which is inserted and held within
the stem of the interlacing hook, beneath which is arranged a square socket
in the plate v, Figure 1, into which the squared end of the pedestal stem j is
fitted, and by that means kept from contact and prevented from turning by
the movements of the hook. The tilting bar or finger is pivotted near its
middle to on side of the circular part of the framework D that surrounds the
shuttle and hook, and it extends in one direction with its end over the centre
pin of the shuttle, which is made hollow to receive a small conical protuberence
or centre on the under side of this end of said bar; the opposite end of this
bar or finger is weighted or made heavier, and rests on the cam J on the
driving shaft, by the revolution of which this end of the bar is lifted and the
opposite end depressed so that the protuberencer will enter the centre of the
shuttle and hold it in its place in the centre of the hook, and from being
carried against the needle while the loop is being carried around it, and also
prevents the shuttle from lifting from the pedestal, and by so doing prevent
the uppermost thread of the loop from passing under it (the shuttle). After the
loop has been carried partly around the shuttle the protuberence r is permitted
to lift from the shuttle, so that the thread over the shuttle may pass by the
protuberence entirely over the shuttle, and be taken up as before explained.
If the weight of the end of the tilting bar should prove insufficient to ensure
its prompt action when the machine is operated with rapidity, or from other

page_text: causes, a slight spring w may be interposed between the bar and the side of the
framework, as shewn at w in Figure 1, so as to lift the protuberence from the
shuttle as quickly as may be necessary.
The constraction and arrangement of the cloth bridge which supports
the cloth beneath the needle and the parts which are immediately con-
nected. therewith for the adaptation of the action of the needle to the
formation of the stitch by the arrangement of the shuttle and interlacing
hook therewith, as above described, have been mentioned as forming part
of my said Invention. The said cloth bridge and the parts alluded to are
shewn separately in Figure 11, and in connection with the sewing parts in
Figures 1. and 6. In Figure 11 the cloth bridge K may be formed in a
separate piece, or it may be formed of the same piece as the bridge ring U, to
which it is otherwise attached by means of two dowel pins o, o, in the bridge
which enter two holes in the ring, the bridge alone or the bridge and ring
requiring to be removeable for the substitution of other bridges adapted to
different sizes of needles. Beneath the cloth bridge in the ring is formed a
vertical recess or needle way c, in which the needle vibrates to form the loop
and present it in the proper position to be caught by the interlacing hook.
This bridge ring is confined in the circular portion of the framework which
holds the hook and shuttle, and when the needle passes through the cloth into
the recess in the bridge ring and carries the loop of needle thread the inter-
lacing book catches the loop just above the needle's eye and trails the lowermost
thread of the loop, which is delivered from said eye against and around the
lower corner or edge of the recess or needle way in the ring, and thence in
a direct line beneath the shuttle while the uppermost thread of the loop:
passes over the shuttle in the manner before explained. The arrangement
of the recess or needle way in the bridge ring with the needle and the hook
and shuttle contributing to the proper formation of the stich.
The mode of hanging and adjusting the needle arm and the presser arm, above
alluded to as forming part of my said Invention, is shewn clearly in Figure 8 of
the Drawings, and consists in forming the said arms with a broad flat circular
hub around their axes and confined on opposite sides of a stout rib F¹ on the
rear end of the frame by means of a tapering screw stud P passing through the
hub of the needle arm, and screwed into the said rib, and a screw sleeve R
passing through the hub of the presser arm and screwing on the end of the
stud P with its (the sleeve's) end bearing against. that side of the said rib, so
that by screwing up the said stud the needle arm will be tightened in its
bearing, and by screwing up the sleeve the presser arm will be tightened in its
bearing, and also that the sleeve will bind the stud between the threads of the

page_text: stud and the rib, and so check and prevent the accidental unscrewing of either
part.
The improved mode of securing the needle n in the end of the needle
arm N is shewn in Figures 2, 3, and 4. The needle is held in a groove
formed in one side of the end of the needle arm by means of a screw bolt y
with a convexity under the head and washer u formed with a concavity upon
one side to fit the under side of the said bolt head, so that the washer may incline
or tip to one side when it is screwed against the needle in the groove of the arm
which is on one side of the bolt, by which arrangement the needle is the more
readily placed and adjusted in the end of the arm and gripped more firmly
than by means of the "needle yoke" (so called) heretofore generally used for
this purpose.
Having now described the nature of these several improvements, and the
manner of carrying the same into effect, I wish it to be understood that what
I claim and desire to have secured to me by Letters Patent is,-
First, the mode of combining and arranging the interlacing hook and the
shuttle constructed as described with the eye-pointed needle so that the loop
of needle thread will be presented to said hook from the inner curvature of
the needle, substantially as and for the purpose specified.
Second, I claim so combining and arranging the said hook and shuttle and
the eye pointed needle as described with an independent mechanism for
taking up the loop of needle thread after it has been carried around the
shuttle as described that the said loop may be taken up and the stitch
completed in one and the same cycle of operations of the machine substantially
as specified.
Third, I claim a fixed stud in a revolving face plate or the equivalent
thereof in combination with a suitable device for regulating the tension of the
needle thread, and a suitable guide eye for confining and directing the thread
to the needle or other suitable means for confining the needle thread upon
each side of said stud for the purpose of taking up the loop of needle thread
after its passage over the shuttle, substantially as and for the purpose
specified.
Fourth, I claim the circular shuttle constructed substantially as described
with a bevilled edge and in combination therewith a delivery notch and a
spring presser arranged substantially as described for the purpose of producing
the requisite tension of the shuttle thread as it is delivered, substantially as
described.
Fifth, I claim mounting or holding the shuttle upon a stationary pedestal
or its equivalent as described, and controlling the operation of the shuttle by

page_text: means of a tilting bar or finger or its equivalent arranged to operate therewith,
substantially as and for the purpose specified.
Sixth, I claim the interlacing hook constructed and operating to catch and
carry the loop of needle thread around the shuttle, substantially in the manner
described.
Seventh, I claim the method described of attaching the removable cloth
bridge to the bridge ring or its equivalent for the purpose specified, and I also
claim the removable bridge ring of which the cloth bridge forms an immoveable
part, substantially as and for the purpose described.
Eighth, I claim so combining the recess C in which the needle vibrates, and
the bridge ring, and the interlacing hook and shuttle, constructed and arranged
substantially as described, that the lower thread of the loop will be caught by
the book and carried in a direct line beneath the shuttle while the upper
thread of said loop is carried against the bevilled shuttle edge and over the
shuttle, substantially in the manner and for the purpose specified.
Ninth, I claim the construction and mode of hanging and adjusting the
needle arm and the presser arm by means of the screw stud and screw sleeve
in combination, substantially as described.
Tenth, I claim the mode of securing the needle n at the end of the needle
arm by means of the screw bolt and washer constructed substantially as
described.
In witness whereof, I, the said Ira Dimock, have hereunto set my
hand and seal, this Twenty-fifth day of January, in the year of our
Lord One thousand eight hundred and sixty-seven.
IRA DIMOCK. (L.S.)