Year: 1886

page_text: Date of Application, 31st Dec., 1886
Complete Left, 30th Sept., 1887
Complete Accepted, 1st Nov., 1887
I, SAUL ISAAC, of Blomfield House, London Wall, in the City of London, Chairman
of the Moldacot Pocket Sewing Machine Company, Limited, do hereby declare the
nature of this invention to be as follows:-
This invention relates to improvements in a so called pocket lock stitch sewing
machine in which the shuttle cradle is carried upon an oscillating sector driven
by the vertical reciprocating movement of the needle bar; and consists in an
improved arrangement of parts by which the shuttle can be removed from the cradle
whon desired without the employment of a spring support to the cradle or spring
hinged cradle.
This object is attained by enabling the head of the sector carrying the shuttle cradle
to be thrown over beyond its point of usual travel, so that the face of the shuttle
basket or cradle is beyond and clear of the face plate or apron, behind which it travels
when at work, and the shuttle can be thus removed.
The shuttle cradle or basket may he thus formed in one part with the sector, or
rigidly attached thereto, the support being formed so as to prevent the cotton loop
from getting behind the basket. The basket may be provided with a light spring in
the centre to keep the shuttle up to the face plate. The sector may be caused to
throw over beyond the extent of its usual travel in the following various but equivalent
methods:
The driving pin on the needle bar may be caused to pass farther down the driving
slot than usual, or enter into a side recess or slot (which is guarded when in work)
and thus throw over the plate beyond its usual travel. Or the pivot centre of the
sector or driving pin of the needle bar may be made so as to slacken, and allow
a rotating movement of the plate about one or other of the said pins, a side slot or
recess being provided in the sector opposite to one pin or the other, to permit of such
rotation. The said sido recess or slot is so made that when the pins are tightened
home, the plate cannot shift from its proper pivotting point in the one case, or in the
other, the driving pin cannot enter the said side slot or recess.

page_text: In the first above named arrangement the operating needle bar is allowed to make
the further required travel by the screwing back of the finger knob or other collar or
stop which forins the check to the usual length of stroke. The shuttle sector is thereby
thrown further over, so that the shuttle is clear of the face plate, and can thus be with-
drawn from the cradle. On screwing down the finger knob or stop, the travel of the
driving needle bar is limited to the usual stroke.
An equivalent modification is effected by the application of a spring guard, pivotted
at one end and secured at the other when in use, by a steady pin or other detent, so as
to act as a guard to the driving slot in the oscillating shuttle sector. The guard
spring so applied prevents the driving pin, which works in the said slot, from passing,
when in ordinary work, into a side slot or recess formed in the said driving slot.
When it is desired to remove the shuttle from the cradle, the said guard spring is
released from its steady pin or detent and moved on its pivot out of the way.
The driving pin is then free to enter the said recess in the driving slot and shuttle
sector, which, allowing the sector to throw further over than its normal travel, carries
the shuttle at the head of the apron plate and thus permits it to be removed with case
from the cradle.
Dated 1:01.
1
1006
FELL & WILDING,
1, Queen Victoria Street, London, E.C.,
Agents for the Applicant.

page_text: I, SAUL ISAAC, of Blomfield House, London Wall, in the City of London, Chairman
of the Moldacot Pocket Sewing Machine Company, limited, 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 improvements in a so called pocket lock stitch sewing
machine in which the shuttle cradle is carried upon an oscillating sector driven by the
vertical reciprocating movement of the needle bar, and consists in an improved
arrangement of parts by which the shuttle can be removed from the cradle when
desired, without the employment of a spring support to the cradle, or spring hinged
cradle.
This object is attained by enabling the head of the sector carrying the shuttle
cradle to be thrown over beyond its point of usual travel, so that the face of the
shuttle basket or cradle is beyond and clear of the face plate or apron behind which it
travels when at work, and the shuttle can be thus removed.
The shuttle cradle or basket may be thus formed in one part with the sector, or
rigidly attached thereto, the support being formed so as to prevent the cotton loop
from getting behind the basket. The basket may be provided with a light spring in
the centre to keep the shuttle up to the face plate.
The sector may be caused to throw over beyond the extent of its usual travel in the
following various but equivalent methods; and in order that this invention may be
the better understood I now proceed to describe the same in relation to the drawings
hereunto annexed, reference being had to the letters and figures marked thereon.
Like letters refer to like parts throughout the drawings.
Figure 1 shows the under part of such a pocket lock stitch machine with the sector
in place for ordinary work.
Figure 2 represents the same machine with the sector thrown over so that the shuttle
may be removed.
Figure 3 represents a detail of the sector plate and spring catch removed from the
machine.
Figure 4 represents a modified arrangement of sector to enable the same effect to
be produced.
Figure 5 represents also a detail of the sector detached from the frame as employed
in a third modified but equivalent arrangement, and:—
Figure 6 shows this device in position and thrown over for the extraction of the
shuttle.
A is the sector plate oscillating by the pivot screw B upon the frame C, the shuttle
in the shuttle basket D resting upon and working behind the apron plate E. In the
first arrangement (figures 1, 2 and 3) a spring guard F is pivotted at one end upon
the sector plate A, and is secured at the other end when in use by a recess G in the
sector plate A, or by a steady pin or other detent. The guard spring so applied and
fixed when in work prevents the driving pin H which works in the slot of the sector
plate from passing into a side recess or sloth formed in the said driving slot. When
it is desired to remove the shuttle from the cradle D, the said guard spring F is

page_text: released from its steady pin or detent, and moved on its pivot out of the way, thereby
permitting the driving pin H to enter the side recess or slot-h-and the sector plate
to fall over as in figure 2. The shuttle may be thus readily removed from the cradle
or shuttle basket.
An equivalent effect may be produced by slackening and partially or wholly with-
drawing the pivot screw B on which the sector oscillates, so that the sector plate, by
the freeing of its lower end, may be made to pull over around the driving pin H when
the latter is at the bottom of its travel, and the shuttle cradle is thus caused to travel
beyond the surface of the apron.
An arrangement to effect this purpose is shown at figure 4, where the pivot screw B
is provided with a screwed shank of small diameter, and a turned shoulder b of larger
diameter upon which the sector normally works. The boss of the sector is conveniently
provided with a conical recess K to guide the shoulder-b-of the pivot screw B back
into its place when screwed home. When the pivot screw is screwed back as shown
in the drawing, figure 4, and the driving pin of the machine is forced to the bottom
of the slot of the sector A, the cradle can be pulled still farther over about the driving
pin by the play of the pivot hole at the bottom of the sector upon its pivot scrow B.
This play may be made sufficient so that the shuttle cradle may be pulled over past
the apron.
A third and equivalent modification by which the throw-over of the sector beyond
its normal position may be effected, is by screwing back the finger knob or other
collar or stop L (figure 6) which forms the check to the usual length of stroke of the
needle bar, the slot in the sector, as shown in figures 5 and 6, being of slightly longer
length than is necessary for the completion of the working stroke of the needle bar.
By the slacking back of the finger knob, collar, or stop L, on the needle bar, l,
the driving pin in the slot of the sector plate A is allowed to travel still farther down
the slot towards its extremity, and thus to throw the sector farther over, as in figure 6,
so that the shuttle is clear of the face plate and can be withdrawn from the cradle.
Upon screwing down the finger knob or stop once more, the travel of the driving
needle bar is again limited to the usual stroke, and the shuttle does not travel beyond
the face of the apron plate.
Having now particularly described and ascertained the nature of this said invention
and in what manner the same is to be performed I declare that what I claim is :-
1st. In a pocket lock stitch sewing machine the combination of a slotted shuttle
sector plate, driven direct from the needle bar with a pivotted guard spring and side
recess to the said slot, so that the shuttle sector may be thrown over when desired to
remove the shuttle therefrom, substantially as described.
2nd. In a pocket lock stitch sewing machine the modified but equivalent combina-
tion of a slotted shuttle sector plate driven direct from the needle bar, with a
shouldered pivot screw, upon partial withdrawal of which the shuttle sector may be
thrown over when desired to remove the shuttle, substantially as described.
3rd. In a pocket lock stitch sewing machine the modified but equivalent combination
of a slotted shuttle sector plate driven direct from the needle bar, with an adjustable
finger knob or other stop or collar determining the normal stroke of the said needle
bar, and by the slackening or removal of which the stroke of the driving needle bar
may be lengthened at will, so that the shuttle sector may be thrown over and the
shuttle removed substantially as described.
Dated this 30th day of September 1887.
FELL & WILDING,
1, Queen Victoria Street, London, E.C.,
Agents for the Applicant.