Improvements in Sewing Machines.
Year: 1898

page_text: Improvements in Sewing Machines.
We, MAURICE LACHMAN, of 291, Gillingham Street, Pimlico, in the County of
London, Engineer, and CHARLES BRANSTON HUNT, of 1, 2 and 3, Dufferin Street,
Golden Lane, in the City of London, Merchant, do hereby declare the nature of
this invention to be as follows.-
This invention relates to that class of sewing machines known as two-reel
machines, the object of the invention being to provide simple and efficient means
for carrying the locking thread reel, and for diving the shuttle
In carrying out our invention, we employ a machine of the rotary-shuttle type,
and we secure to the underside of the fable, and transversely thereof, a vertical
annular shuttle race, in which the shuttle is held by an annular plate suitably
secured to the face of the 1ace, or in any other convenient manner.
The shuttle is formed in two parts, which, when put together, form a case,
which, seen in edge view, has the appearance of a double truncated cone.
One of these parts is fixed, in the sense that it does not rotate, and the other
rotates. The rotating part is formed with a rim or flange, a portion of which
18 cut away, and one side or end of this rim, where cut away, is bevelled off, or
otherwise formed, to make a hook, to take into the loop of the needle thread.
The face of this flange is recessed to receive the edge of the other part of the
shuttle, which thus, for the greater part of its circumference, underlies or fits into
the rim or flange
The rotating part callies an internal pin or peg, on which the ieel is mounted,
and which pin or peg may be tubulai, to receive a short pin on the fixed part,
so that the two parts shall always maintain the same relative positions, or the
pins may be reveised.
The rotary part 18 driven by two moveable fingers suitably carried on the end
of a rotary shaft below the table, the movement being effected by a fixed cam,
which acts on the fingers, or in any other convenient manner
A nose or point on each finger enters a corresponding hole in the side of the
case, and the cam 18 timed to let the nose of one finger withdiaw while the other
is driving, in order to allow for the passage of the needle thread loop over the
shuttle, as 18 well understood
The fixed pait of the shuttle may be adjustably attached to the latch, so as to
fall over with it, when it is desired to place a fresh reel in the case
Dated this 23rd day of December 1898
NEWTON & SON,
Agents for the Applicants.

page_text: We, MAURICE LACHMAN, of 291, Gillingham Street, Pimlico, in the County of
London, Engineer, and CHARLES BRANSTON HUNT, of 1, 2 and 3, Dufferin Street,
Golden Lane, in the City of London, Merchant, do hereby declare the nature of
this invention and in what manner the same is to be performed, to be particularly
descubed and ascertained in and by the following statement:―
This invention relates to that class of sewing machines known as two-reel
machines, the object of the invention being to provide simple and efficient means
constituting a case for carrying the reel of the locking thread and for driving
such reel саве
In the accompanying drawing
Fig 1 is a side elevation, partly in section, of so much of a sewing machine as
is necessary to illustrate the invention
Fig 2 is a front view of the head; and
Figs 3 to 8 are details which will be more particularly referred to hereafter.
a is the head of the machine, 6 the table of the machine, and c the driving shaft
for operating the reel case.
To the underside of the table b, and transversely thereof, we secure, in any
convenient manner, a vertical recessed ring, which we may term a race, d, which
receives a part of the reel case, the same being held in any convenient manner,
by a plate e secured by screws to the face of the race d (see Fig 2)
8&Y,
The reel case is composed of two hollow comical or dish-shaped parts f, g,
which, when put together, form a case resembling in external appearance, and
when seen in edge view, two truncated cones placed base to base
The part of the case 18 fixed, in the sense that it does not rotate, and the
part rotates under the influence of the driving shaft c, as will be presently
explained
g
The part is formed with a rim or flange h, the face of which is recessed, as
shown at Fig 3, to receive the edge of the part f, which fits and lies snugly in
the recess
This flange fits in the race d, and the plate e overlies it and retains
it in the race.
A portion of the flange h is cut away, as seen at Fig 4, and one end is pointed,
to form a hook i, to take into the loop of the needle thread, to draw the loop
round the reel case
The thread from the reel is brought out through a hole in the fixed part of
the case, and passes under a tension plate or spring k, as seen at Fig. 2
One part of the case carries a central hollow pin or peg, which receives a solid
pin or peg carried by the other part; thus, the two parts are always maintained
in the same relative positions, and the reel ? 18 mounted on the hollow peg
The part of the reel case is held in the recess of the part g, and its rotation is
prevented by a spring finger or latch m, of the usual or any convenient construction,
as indicated in Figs 1, 2, 3, and 5
n is a grooved cam (see Fig. 6), which 18 secured to the back of the race d, or
in any other convenient position, and in the groove work two pins, forming part
of a driving device, which will now be described.
On the end of the shaft c is mounted a piece o, having two arms set at an
angle (see Fig 8) These arms are formed to receive slides p, each of which is
provided with a pin q, so placed or arranged as to enter the groove of the cam n.
Each slide p also carries a pin or finger r, the nose or point of which takes into
a hole or recess formed in the part g of the reel case (see Figs 3, 4, and 6)
cam n 18 timed to cause the nose of one finger to withdraw while the other is
The

page_text: driving, in order to allow for the passage of the needle thread loop over the case,
as is well understood
The fixed part f of the case may be adjustably attached to the latch 'm, so as
to fall away with it from the part g, when it is desired to place a fresh reel in
the case
The two parts or cones f, g, of the reel case are equal in all respects, and the
hook is placed centrally; consequently, the loop 18 evenly formed, both threads
of the loop being of equal length, instead of one being almost straight, while
the other bulges, out as heretofore
The strain on the thread is thus equally distributed, and there is less tendency
for the thread to break than 18 the case under ordinary circumstances, where the
two threads are necessarily of unequal lengths.
For the same reason, it has been found that in the present invention the
tendency of the threads of the loop to twist or kink 18 practically overcome, such
twisting or kinking constituting a disadvantage well known to manufacturers
of sewing machines, and which often causes the breaking of the thread.
The part f, being stationary, acts as a spreader, to open the loop, and helps the
cotton to run over both parts of the case
This is an important feature, for it has been found that when the case is
enlarged to the extent necessary to enclose a reel carrying, say, 250 yards of
thread, and the reel case is in one piece, so that both halves rotate, the machino
will not work, the reason apparently being, that the friction on the enlarged
surface of the reel case causes an undue drag on the thread, which prevents the
loop sliding over the case.
By the above construction of reel case, the difficulties experienced in getting
the loop round the reel, and which have hitherto necessitated a special fooping
device independent of the reel carrier, are hereby overcome.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is,-
1 A locking-thread reel case for a two-reel sewing machine, consisting of two
hollow conical or dish-shaped parts of equal dimensions (the larger diameters
being juxtaposed), containing pins on which the reel is mounted, a rib oi flange
formed at the base of one part, and thus situated centrally of the case, and a
hook formed from the said rib or flange, as herein shown and described
2 A locking-thread reel case for a two-reel sewing machine, as described in
Claim 1, in combination with a race in which one part is fitted so as to rotate,
and a spring latch device for holding the other pait stationary, as shewn and
described, and for the purpose set forth
3 In a two-reel sewing machine, a 10tating hook and a locking-thread ieel case
combined, as shewn and described
4 A driving mechanism for the reel case described in Claim 1, consisting of
two slides carried by a diven shaft, and provided with fingers to take into recesses
in the reel case, and with pins to take into the groove of a fixed cam, as set forth.
Dated this 1st day of May 1899
NEWTON & SON,
Agents for the Applicants.