Year: 1895

page_text: We, EMIL SAURER and ADOLF SA URER, carrying on business in co-partnership
under the style of F. Saurer's Sohne of Arbon, Switzerland, do hereby declare the
nature of this invention to be as follows:-
This invention relates to automatic apparatus for determining the stitches in
embroidering machines wherein the driving motion is transmitted to the two
devices for producing the horizontal and vertical movements of the movable
embroidering frame, by means of two series of bars, the arrangement being such
that the bars of each series are capable of being moved longitudinally in suitable
guide-ways by means of a part acting upon them. in the manner of an inclined
surface, in such a way that the stroke of each succeeding bar of the series is
successively greater, whereby each of the two aforesaid frame-driving devices is
enabled to have imparted to it in every instance the driving motion corresponding
to a determined length of stitch, the arrangement being such that the respective
driving device is coupled with that bar (of the series of bars operating said
driving device) the length of whose stroke corresponds to the motion to be given
to the embroidering frame.
The accompanying drawings illustrate by way of example one arrangement of
stitch-determining apparatus constructed according to the present invention.
Fig. 1 being a front elevation,
Fig. 2 a side elevation, and
Fig. 3 a plan of the same.
Fig. 4 shows one working position of oue of the series of bars;
Fig. 5 shows a mode of connecting the embroidering frame with the two devices
for effecting its horizontal and vertical motion; and
Fig. 6 illustrates a detail.
In embroidering machines adapted to automatically determine their stitches, the
embroidering frame is usually connected to two shafts in such a manner that a
rotary motion of one shaft in one or the other direction of rotation produces a
horizontal movement of the embroidering frame to the right or to the left, whilst
rotation of the other shaft in one or the other direction of rotation produces an
upward or a downward vertical movement of the embroidering frame; and when
both shafts are rotated at one and the same time, the embroidering frame receives
a movement resulting from the two separate or single movements, such resulting
movement taking place from right to left, or from left to right with an upward or
downward inclination, according to the direction of the separate or single
movements. The extent of these movements depends on the extent of the rotary
movement of the shafts. Fig. 5 illustrates one of the possible modes of connection

page_text: of the two shafts with the embroidering frame. In this arrangement, the
embroidering frame 2 is suspended from rollers 1 by means of stirrup-shaped parts
or links 3 that allow of the horizontal movement of the embroidering frame.
These rollers are, for the purpose of permitting vertical movement of the
embroidering frame, carried by two-armed levers 4 which are suitably weighted so
as to balance the embroidering frame. Connected to the rollers 1 are bands 5
attached to the peripheries of two discs 7 mounted on a shaft 6. This shaft 6
serves to move the embroidering frame 2 in a vertical direction. According as
the shaft 6 is rotated in one or the other direction, the bands 5 are wound up on
their discs 7 or are unwound therefrom, assuming that the weight of the
embroidering frame 2 is somewhat greater than the counter-balancing weight.
Horizontal motion of the embroidering frame is derived from a shaft w whose end,
which is formed as a screw-spindle, works in a nut 8 provided on the embroidering
frame, in such a manner that the shaft w acts to move the embroidering frame to
the right or to the left, according to the direction of rotation of the shaft w. The
connection of the nut 8 with the embroidering frame must of course be such as not
to interfere with the vertical motion of the latter.
For the purpose of producing an automatic motion of the frame whilst
embroidering, these two shafts 6 and w must be connected to power-driven
mechanism which is caused by the governing action of a pattern card or the like
to automatically impart to these shafts, periodically, the rotary movements by
means of which the embroidering frame is caused to assume the positions suitable
for effecting the desired stitches in their proper order. For this purpose there is
employed the small auxiliary machine marked A in Fig. 5. In this auxiliary
machine there is arranged co-axially with the shaft w and immediately behind
that shaft a shaft w', Figs. 1 and 2, from which the shaft 6 which serves to
produce the vertical movements of the embroidering frame, is driven through the
medium of an intermediate shaft 9 which receives its motion by means of spur-
wheels 10, 11, from the shaft w' and transmits its motion to the shaft 6 by means
of a band 12, Fig. 5, running over suitable pulleys. On each of the two shafts w
and w¹ there is arranged a double-sided clutch the central sleeve m or m' of which
is capable of moving along its shaft w or w¹, but is feathered thereto so that it
cannot rotate thereon, whilst the two side sleeves or parts p q or p¹ q¹ are loose on
their shafts. When, as is hereinafter described, the two side portions p q or p' q
of each clutch are rotated in opposite directions, the respective shaft w or w² will
be carried round in one or the other direction-and, consequently, the shaft w will
cause the embroidering frame to move to the right or to the left, and the shaft w¹
will cause the frame to move upward or downward, according as the corresponding
central sleeve m or m³ is moved along on its shaft into engagement with one or the
other side sleeve.
In order to rotate the sleeves p q, or pl q¹ of each clutch only just so much as is
requisite for the desired movement of the embroidering frame, the following
arrangement is employed. In connection with each of the shafts w, w¹, there is
provided a set of bars 7 or which are arranged in a row and are guided so as to
move vertically. Engaging with the bars of each set is a one-armed lever a or a¹,
having a longitudinal rib 6 or 6 engaging in suitable notches in the bars 1 or 1, So
that when the respective lever a or a' is rocked upwards out of its lowest position
shown in Fig. 1, the said bars will be moved longitudinally to an extent increasing
with their distance from the centre of rotation of the lever. Fig. 4 illustrates the
position of the bars of a set on the completion of a stroke of the lever.
levers a, a¹ are driven by means of rocking beams c and c', which are connected by
means of connecting rods d and d with the ends of the levers a and a' and by.
means of connecting rods e and e¹ with the crank pins f and f¹ of a shaft g
by which the small machine A is driven. The levers a, a and bars 1, therefore
always have the same length of stroke. Behind the bars of each set there is
arranged transversely to the bars and so as to slide in vertical slots in the machine
framing, a rail s or s¹, with horizontal holes in which there are as many pins h as
The

page_text: there are bars or in one set, the arrangement being such that their ends nearest
to the bars are, for the initial position of the bars, situated opposite to horizontal
holes i provided in said bars. The rear ends of the pins are bent to a U-shape
at for reasons hereinafter stated.
When one of the pins of one of the rails s, s¹ is pushed forward into engagement
with a bar or 1 of one of the levers a or a', the corresponding rail must share
stroke of the said bar, and the said rail will have a greater or shorter stroke
according as the bar is situated further from or nearer to the pivot of the respective
lever a or a¹.
Fig. 4 illustrates with reference to the set of bars, two different lengths of stroke,
which the rail s makes, starting from the initial position a on a complete or full
stroke of the respective lever a. In one case, a bar 1 m, at about the middle of
the set, serves to carry the rail s up into the position y; and in the other case the
outermost bar 1 z moves the rail up to z. Thus each of the rails s, s may be
caused to travel through a succession of different heights between the two extreme
positions and. The rails s, sl serve to produce simultaneous rotation of the
two side sleeves of the claw-clutches. For this purpose one of the side sleeves of
each of the two claw-clutches, viz., q or pl, engages by means of a disc k or r² fixed
thereto with a disc-segment n or n which is mounted as the arm of a lever on a
shaft o or o'. The other side sleeve p or q¹ engages by means of a corresponding
disc or with a disc-segment t or which is mounted on a shaft u or u'.
The engagement between the discs k, r¹, kl, r, and the disc-segments n, n', t, t¹,
is such that no slipping can take place between them. This is effected by means
of two steel bands in each case, which are applied to the peripheries of each pair
of co-operating disc-elements in such a manner as to cross one another at the
point of contact, so that when the elements roll over each other, one band will
always act with a pulling force whereby the rotation of one disc-element is
positively effected.
The segment n or n' of each claw-clutch is, by means of a rod 13 or 13¹ and an
arm 14 or 14 mounted on the shaft u or u', connected in such a manner with the
other segment t or t' of this clutch, that the two segments nt or n't belonging to
one clutch, shall, when the segment n or n' is rotated, rotate in opposite directions,
but to the same extent, so that consequently also the two side-sleeves p q or p¹ q₁
of each clutch shall rotate to equal extents but in opposite directions. Each of
the rails S, is connected by means of two rods 15, 15 and two arms 16, 16' with
one of the shafts o and o' in such a manner that on the rising of the rails s, s' there
will be produced a rotary movement of the segments n, n', t, t' dependent upon the
amount of the said rise, and in consequence thereof also a similar rotary movement
of the side sleeves p¹, q and p, q' of the claw-clutches. This rotary movement is
transmitted to the shafts w, w, which are thereby caused to rotate in the same
direction or in opposite directions according as the central sleeves m, m' of the
claw-clutches are thrown into gear with the one or the other of the two side
sleeves. The movement of the embroidering frame is dependent on the rotary
movements of the shafts w, w¹, as herein before described.
The extent of the motion of the embroidering frame thus depends on the
selection of the bars or which control the stroke of the rails s, s'. For this
reason, a sufficiently large number of bars or 1 must he provided in each of the
two sets, in order that the greatest movement of the embroidering frame caused by
the outermost bar (12) shall correspond to the greatest length of stitch which can
occur in embroidery work to be performed with the aid of the apparatus, whilst
within the greatest length of stitch there shall be available sufficiently small
gradations of length of stitch. It should be noted that the strokes of the bars 1, 1
are reduced by intermediate gearing in transmission to the embroidering frame 2,
so that very small differences in the length of the stitches can be produced.
The said intermediate gear consists in the example shown in the one case, of a
shaft 9 which is interposed between the shafts and 6, and which receives
a reduced rotary movement by means of the toothed wheels 10 and 11, and

page_text: transmits the same to the shaft 6. In the other case the shaft w acts as a screw
upon the embroidering frame 2, thus constituting of itself a reducing gear. The
insertion of the pins & into the bars 7 or 1, is effected automatically by means of a
jacquard-apparatus. The function of the latter is, before the commencement of
each separate movement of the embroidering frame 2, when the said frame is to
execute only a horizontal movement or only a vertical movement, to push a pin h
into one of the bars or lof one or the other set, so that during the stroke, one of
the rails S, s shall remain at rest. When, however, the embroidering frame is to
receive a motion resulting from the combination of a horizontal and a vertical
motion, the jacquard-apparatus has to push a pin into one of the bars 1 or lof each
set, so that both rails s, s' shall be raised simultaneously.
The jacquard-apparatus comprises a cylinder 18 suspended, so as to be capable
of oscillating, by means of arms 17 from the framing of the machine. A row of
needles 19, movable longitudinally in needle-beds 20 fixed to the said arms and
corresponding in number to the pins h, are adapted to remain in an upper position
or assume a lower position, according as the pattern-card of a chain of cards 21
hung over the cylinder presents in the well known manner to the bases of the
needles 19 an imperforate spot as abutment or a perforated spot. Each needle 19
has an arm 22 facing one of the pins', which arm, when the cylinder 18 swings
forwards towards the pins h, strikes, when the corresponding needle is in its lower
position, against the corresponding pin, that is to say, against the rear vertical leg
of its U-shaped bent end 7º. According to the preceding description, only one
needle 19 at most can, for each set of bars, be allowed to be in the lower position
at the moment of insertion; all the other needles must be raised. The insertion of
the pin is effected in opposition to the action of a spring 23, which bears against
the other vertical leg of the U-shaped bent end hº of the pin, and has a tendency
to push the pin out of engagement with the corresponding bar or . On the
upward movement of the rail s or s (coupled by the pin with one of the bars
or ), during the first portion of which the pressure of the needle-arm 22 upon the
pin continues, the pin is relieved of the influence of the spring 23, whilst at the
end of the downward movement of the rail the pin is drawn by the spring out of
engagement with the respective bar, the U-shaped end 1° of the pin running upon
a kind of inclined plane formed by the spring.
The to and fro oscillation of the cylinder 18 is derived from cam-discs 24, 24¹
mounted on the shaft g, the said cam-discs acting upon rollers 25 mounted on the
arms 17.
When the cylinder swings away from the pins h, a stirrup-shaped
lever 26; which is fixed on a shaft 27 arranged between the arms 17, lifts up all the
needles 19. This is effected by the oscillation of the lever 26 towards the right-
hand by an arm 28 fixed on the shaft 27 and rod 29 connecting the arm 28 with
the framing of the machine. When the cylinder 18 is in its rearmost position,
there is no engagement between the needles 19 and the cylinder, so that the latter
may be rotated in the well known manner during the first part of the forward
movement, so as to present a fresh pattern card of the chain 21 of cards to the
needles 19.
For the complete automatic action of the machine there is still requisite the
automatic operation of the two claw-clutches. This is also effected by the
jacquard-apparatus.
The middle sleeve m or m¹ of each of the claw-clutches is provided with an
annular groove, which, in the present case, is arranged between one of the claw-
peripheries of the middle sleeve and a ratchet-wheel 41 fixed on the said sleeve
and having an object to be mentioned hereinafter. Into these grooves there
engage respectively arms 30, 30¹ of vertical shafts, 31, 31', which carry on their
lower parts two diametrically opposite lateral arms 32, 33 and 32, 33¹ respectively.
With each of these arms a hook 34 rotatably mounted on a shaft 43 of the
jacquard-apparatus, can be made to engage (there being, consequently, four of such
hooks) and be thereby enabled, when the jacquard-cylinder swings forward, to
rotate the shaft 31 or 311, and by means of the arm 30 or 30¹ to move the middle

page_text: sleeve of the respective claw-clutch into gear with one of the side sleeves. Which
one of the latter is thus engaged, that is to say, in what direction the shaft w or w
is rotated, depends on which of the two hooks 34 belonging to each shaft 31 or 31¹
is thrown into gear.
The hooks are thrown, into gear by means of four needles 35.
which are arranged behind the row of needles 19, are guided in the same manner
as these, and are each connected with one of the hooks 34. The hooks 34 catch.
over the arms 32, 32¹ or 33, 331 when the needles 35 assume their lower position,.
that is to say, when the jacquard pattern-card situate on the cylinder 18 presents a
perforation in the well known manner to the bases of the needles 35. The
hooks 34 are thrown out of gear with the arms 32, 321 or 33, 33' and their pins 35.
at the same time lifted out of the holes of the cylinder 18, during the return of the
said cylinder. This is effected by means of a stirrup-shaped lever 36 which is
Oscillated upwardly by means of a small spur-wheel 37 mounted on the axle of the
said lever, the said wheel 37 rolling over a fixed portion of an internally toothed
ring 38. Each of the shafts 31, 311 is returned into the middle position, (in which
the middle sleeves m, m' of the claw-clutches are out of engagement with the side
sleeves of the said clutches) by means of two disc-sectors 39 and 391 which are
fixed on the shaft g and which at each revolution move with a radial sharp edge in
between the two legs of each of two forked arms 40, 40¹ of the shafts 31, 31', so
that, in their passage through these forks, they force the respective levers and
shafts into their middle positions, whether the oscillations of the said levers and
shafts have taken place in one or the other direction of rotation.
Fig. 6 illustrates the two positions of oscillation of the legs of the fork of one of
the levers 40, and shows the sharp edge of the sector 39 at the moment of entry in
between the same. The disc-sectors 39 and 39¹ are so keyed on the shaft 9 and
are made of such dimensions, that as long as the jacquard-apparatus is able to act
upon the shafts 31, 31¹ these sectors are out of engagement with the levers 40, 40¹.
In order to prevent the middle sleeves m, m¹ of the claw-clutches when thrown out
of gear, from accidentally rotating with the shafts w, wl, which would cause a
wrong setting of the embroidering frame 2, there is fixed to each middle sleeve.
a ratchet wheel 41 or 41' in which engages a pawl 42 or 42' attached elastically to
the framing of the machine.
Instead of the levers a, a', inclined surfaces may be employed, which are pushed.
parallelly to themselves and which, in the course of their travel or stroke, carry
with them the bars of each set in succession.
Improvements in or in connection with Embroidering Machines.
We, EMIL SAURER and ADOLF SAURER, carrying on business in co-partnership.
under the style of F. Saurer's Söhne, of Arbon, Switzerland, 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 automatic apparatus for determining the stitches in
embroidering machines wherein the driving motion is transmitted to the two.
devices for producing the horizontal and vertical movements of the movable
embroidering frame, by means of two series of bars, the arrangement being such
that the bars of each series are capable of being moved longitudinally in suitable
guide-ways by means of a part acting upon them in the manner of an inclined
surface, in such a way that the stroke of each succeeding bar of the series is

page_text: successively greater, whereby each of the two aforesaid frame-driving devices is
enabled to have imparted to it in every instance, the driving motion corresponding
to a determined length of stitch, and the respective driving device is coupled with
that bar (of the series of bars operating the said driving device) the length of
whose stroke corresponds to the motion to be given to the embroidering frame.
The drawings filed with our Provisional Specification illustrate by way of
example one arrangement of stitch-determining apparatus constructed according
to this invention.
Fig. 1 being a front elevation.
Fig. 1 being a front elevation.
Fig. 2 an end elevation, and
Fig. 3 a plan of the same.
Fig. 4 shows one working position of one of the series of bars;
Fig. 5 shows a mode of connecting the embroidering frame with the two devices
for effecting its horizontal and vertical motion; and
Fig. 6 illustrates a detail._
In embroidering machines adapted automatically to determine their stitches, the
embroidering frame is usually connected to two shafts in such a manner that a
rotary motion of one shaft in one or the other direction of rotation produces a
horizontal movement of the embroidering frame to the right or to the left, whilst
the rotation of the other shaft in one or the other direction produces an upward or
a downward vertical movement of the embroidering frame; and when both shafts
are rotated simultaneously, the embroidering frame receives a movement resulting
from the two separate or single movements, such resulting movement taking place
from right to left, or from left to right, with an upward or a downward inclination,
according to the direction of the separate or single movements. The extent of
these movements depends on the extent of the rotary movement of the shafts.
Fig. 5 illustrates one of the possible modes of connection of the two shafts with the
embroidering frame. In this arrangement, the embroidering frame 2 is suspended
from rollers 1 by means of stirrup-shaped parts or links 3 that allow of the horizontal
movement of the embroidering frame. These rollers are, for the purpose of
permitting vertical movement of the embroidering frame, carried by two-armed
Levers 4 which are suitably weighted so as to as nearly as possible balance the
embroidering frame. Connected to the rollers 1 are bands 5 attached to the
peripheries of two discs 7 mounted on a shaft 6. This shaft 6 serves to move
the embroidering frame 2 in a vertical direction. According as the shaft 6 is
rotated in one or the other direction, the bands 5 are wound up on their discs 7 or
are unwound therefrom, assuming that the weight of the embroidering frame 2 is
somewhat greater than the counterbalancing weight. Horizontal motion of the
embroidering frame is derived from a shaft w whose end, which is formed as a
screw-spindle, works in a nut 8 mounted on the embroidering frame, in such a
manner that the shaft w will move the embroidering frame to the right or to the
left, according to the direction of rotation of the shaft w. The connection of the
nut 8 with the embroidering frame must of course be such as not to interfere with
the vertical motion of the latter.
For the purpose of producing an automatic motion of the frame whilst
embroidering, the two shafts 6 and w must be connected to power-driven
mechanism that is caused, by the governing action of a pattern-card or the like,
to impart automatically to these shafts, periodically, the rotary movements by
means of which the embroidering frame is caused to assume the positions suitable
for effecting the desired stitches in their proper order. For this purpose there is
employed the small auxiliary machine marked A in Fig. 5. In this auxiliary
machine there is arranged, co-axially with the shaft w and immediately behind
that shaft, a shaft w' (Figs. 1 and 2) from which the shaft 6, that serves to produce
the vertical movements of the embroidering frame, is driven through the medium
of an intermediate shaft 9, which receives its motion by means of spur-wheels 10
and 11, from the shaft w' and transmits its motion to the shaft by means of an
endless band 12 (Fig. 5) running over suitable pulleys. On each of the two

page_text: shafts w and to there is arranged a double-sided clutch the central sleeve m or m²
of which is capable of moving along its shaft w or w¹, but is feathered thereto so
that it cannot rotate thereon, whilst the two side sleeves or parts p q or p' q' are
loose on their shaft as regards rotation thereon but not as regards longitudinal
displacement. When, as is hereinafter described, the two side portions p q or p¹ q
of each clutch are rotated in opposite directions, the respective shaft w or w' will
be carried round in one or the other direction-and, consequently, the shaft w will
cause the embroidering frame to move to the right or to the left, or the shaft w¹
will cause the frame to move upward or downward-according as the corresponding
central sleeve m or m¹ is moved along on its shaft into engagement with one or the
other side sleeve.
In order to rotate the sleeves p q or p¹ q' of each clutch only just so much as is
requisite for the desired movement of the embroidering frame, the following
arrangement is employed. In connection with each of the shafts w, w¹ there is
provided a set of bars or 1, which are arranged in a row and are guided so as to
move vertically. Engaging with the bars of each set is a one-armed lever a or a²,
having a longitudinal rib bor b¹ engaging in suitable notches in the bars 1 or 1, so
that when the respective lever a or a¹ is rocked upwards out of its lowest position,
shown in Fig. 1, the said bars will be moved longitudinally to an extent increasing
with their distance from the centre of rotation of the lever.
Fig. 4 illustrates the position of the bars of a set on the completion of a stroke
of the lever a. The levers a, a¹ are driven by means of rocking beams c and c¹,
which are connected by means of rods d and d¹ with the ends of the levers a and a¹,
and by means of rods e and e¹ with the crank pins fand f¹ of a shaft g by which
the small machine A is driven. The levers a, a¹ and bars 1, therefore always
have the same length of stroke. Behind the bars of each set there is arranged,
transversely to the bars and so as to slide in vertical slots in the machine-framing,
a rail s or s, provided with horizontal holes in which there are as many pins h, as
there are bars or in each set, the arrangement being such that the ends of the
pins nearest to the bars are, when the bars are in their initial or lowest position,
situated opposite to horizontal holes i provided in the said bars. The rear ends of
the pins are bent to a U-shape at 4° (Fig. 2) for reasons hereinafter stated.
When one of the pins of one of the rails 8, is pushed forward into engagement
with a bar lor of one of the levers a or a¹, the corresponding rail s or s¹ must
share the stroke of the said bar, and the said rail will have a greater or shorter
stroke according as the bar is situated further from or nearer to the pivot of the
respective lever a or a¹.
Fig. 4 illustrates with reference to the set of bars l, two different lengths of
stroke, which the rails can make, starting from the initial position during a
complete or full stroke of the respective lever a. In one case, a bar 1 m, at about
the middle of the set, serves to carry the rail s up into the position y; and in the
other case the outermost bar z moves the rail up to z. Thus each of the rails s
and s may be caused to travel through a succession of different heights between
the two extreme positions x and z.
.
Each of the rails s and s¹ serves to produce the simultaneous rotation, in opposite
senses, of the two side sleeves of one or other of the claw clutches. For this
purpose one of the side sleeves of each of the two claw clutches viz. q or p¹ engages
by means of a disc k or r¹ fixed thereto, with a disc-segment n or n' mounted on the
arm of a lever on a shaft o or o'. The other side sleeve p or q¹ engages by means
of a corresponding diser or with a disc-segment t or t¹, mounted on a shaft u or u¹.
The engagement between the discs k, r¹ k₁r, and the disc segments n, n', t¹, t, is
such that no siipping can take place between them. This is effected in each case
by means of two steel bands which are applied to the peripheries of each pair of
co-operating disc elements in such a manner as to cross behind one another opposite
the point of contact, so that when the elements roll over each other, one band will
always act with a pulling force whereby the rotation of one disc element is
positively effected. The segment n or n of each claw-clutch is, by means of a

page_text: rod 13 or 13 and an arm 14 or 14¹ mounted on the shaft u or u¹, connected in such
a manner with the other segment or t¹ of this clutch, that the two segments n t
or n't belonging to one clutch, shall; when the segment n or n¹ is rotated, rotate
in opposite directions, but to the same extent, so that consequently also the two
side sleeves pg or pl q' of each clutch shall rotate to equal extents but in opposite
directions. Each of the rails s, s' is connected by means of two rods 15 or 15' and
two arms 16 or 16' with the corresponding shaft o or o¹ in such a manner that on
the rising of the rails s, s¹ there will be produced a rotary movement of the
segments n, n', t, t' dependent upon the amount of the said rise, and, in consequence
thereof, also a similar rotary movement of the side sleeves p', q and p, q' of the
claw-clutches. This rotary movement is transmitted to the shafts w, w', which are
thereby caused to rotate in the same direction or in opposite directions according
as the central sleeves m, m' of the claw-clutches are thrown into gear with side
-sleeves that rotate in the same directions or in opposite directions.
The movement of the embroidering frame is dependent on the rotary movements
of the shafts w, w¹, as herein before described. The extent of the motion of the
embroidering frame thus depends on the selection of the bars and which control
the stroke of the rails s and s¹. For this reason, a sufficiently large number of
bars or must be provided in each of the two sets, in order that the greatest
เ
movement of the embroidering frame caused by the outermost bar (1) shall
correspond to the greatest length of stitch which can occur in embroidery work
to be performed with the aid of the apparatus, whilst within the greatest length
of stitch there shall be available sufficiently small gradations of length of stitch.
It should be noted that the strokes of the bars 1, are reduced by intermediate
mechanism in transmission to the embroidering frame 2, so that very small differences
in the length of the stitches can be produced.
The said intermediate mechanism in the example shown comprises in the one
case a shaft 9 which is interposed between the shafts wo¹ and 6 and receives a
reduced rotary movement by means of the toothed wheels 10 and 11, and transmits
the same to the shaft 6. In the other case the shaft w acts as a screw upon the
embroidering frame 2, thus in combination with the nut in which it works,
-constituting reducing mechanism.
The insertion of the pins h into the bars or is effected automatically by means
of a jacquard-apparatus. The function of the latter is, before the commencement
of each separate movement of the embroidering frame 2, when the said frame is to
execute only a horizontal movement, or only a vertical movement, to push a pin h
into one of the bars or l¹ of one or the other set, so that during the next stroke of
the levers a, a', one of the rails s or s¹ shall remain at rest, whilst the other is
operated. When, however the embroidering frame is to receive a motion resulting
from the combination of a horizontal and a vertical motion, the jacquard apparatus
has to push a pin into one of the bars of each set, so that both rails s, s² shall
be raised simultaneously.
The jacquard apparatus comprises a cylinder 18 suspended by means of arms 17
and 17 from the framing of the machine; so as to be capable of oscillating. A
row of needles 19 (Fig. 3) that are movable longitudinally in needle-beds 20 fixed to
the said arms and corresponding in number to the pins h, are adapted to remain in
an upper position or to assume a lower position, according as the pattern-card of a
chain of cards 21 hung over the cylinder presents in the well known manner to the
bases of the needles 19, an imperforate portion as abutment, or a perforated portion.
Each needle 19 has an arm 22 facing one of the pins h, which arm, when the
cylinder 18 swings forwards towards the pins h, strikes, when the needle is in its
lower position, against the corresponding pin, that is to say against the rear
vertical leg of its U-shaped bent end h°. According to the preceding description,
only one needle 19 at most can, of each set of bars, be allowed to be in the lower
position at the moment of insertion; all the other needles must be raised. The
insertion of the pin is effected in opposition to the action of a spring 23, which
bears against the other vertical leg of the U-shaped bent end 4° of the pin, and has

page_text: a tendency to push the pin out of engagement with the corresponding bar 1 or F.
On the upward movement of the rails or s', (coupled by a pin with one of the
bars or ), during the first portion of which the pressure of the needle-arm 22
upon the pin continues, the pin is relieved of the influence of the spring 23, and at
the end of the downward movement of the rail, the pin is forced by the spring out
of engagement with the respective bar, the U-shaped end of the pin running
upon what may be called an inclined plane, formed by the spring.
The oscillation of the cylinder 18 is derived from cam-discs 24 and 24' which are
fixed on the driving shaft 9 and act upon rollers 25 mounted on the arms 17 and 171.
When the cylinder swings away from the pins h, a stirrup-shaped lever or frame 26,
which is fixed on a shaft 27 arranged between the arms 17 and 17', lifts up all the
needles 19. This is effected by the oscillation of the lever or frame 26 towards the
right hand by an arm 28 fixed on the shaft 27 and a link 29 connecting the arm 28
with the framing of the machine. When the cylinder 18 is in its rearmost position,
the needles 19 are clear of the cylinder, so that the latter can be rotated in the
well known manner during the first part of the forward movement, in order to
present a fresh pattern card of the chain 21 of cards to the needles 19.
For the complete automatic action of the machine, there is still requisite the
automatic operation of the two claw-clutches. This is also effected by the jacquard
apparatus. The middle sleeve m or m¹ of each of the claw-clutches is provided
with an annular groove, which, in the example shown, is arranged between one of
the claw-peripheries of the middle sleeve and a ratchet-wheel 41 or 41' fixed on
the said sleeve. In these grooves there engage respectively horizontal arms 30
and 30' fixed on vertical shafts 31 and 31', which carry at their lower portions
two diametrically opposite lateral arms 32, 33 and 321, 33' respectively. Four
hooks 34, rotatably mounted on a shaft 43 of the jacquard apparatus, can be made
to engage severally with the arms 32, 33 and 32, 33 and can be thus enabled, to
rotate the shaft 31 or 31' when the jacquard-cylinder swings forward, and by
means of the arm 30 or 30¹ to move the middle sleeve of the respective claw-clutch
into gear with one or other of its side sleeves. Which one of the latter is thus
engaged that is to say, in what direction the shaft w or w¹ is rotated depends on
which of the two hooks 34 belonging to each shaft 31 or 311 is thrown into gear.
The hooks are thrown into gear by means of one or other of four needles 35 which
are arranged behind the row of needles 19, are guided in the same manner as' the
needles 19 and are each connected with one of the hooks 34. The hooks 34 catch
over the arms 32, 321 or 33, 331 when the needles 35 'assume their lower position
that is to say, when the jacquard pattern-card situate on the cylinder 18 presents
a perforation in the well known manner to the bases of the needles 35. The
hooks 34 are thrown out of gear with the arms 32, 32¹ or 33, 331 and their
needles 35 at the same time lifted out of the holes of the cylinder 18, during the
return movement of the said cylinder. This is effected by means of a stirrup-
shaped lever or frame 36 which is oscillated upwardly by means of a small spur-
wheel 37 fixed on the axle of the said lever or frame, the said wheel 37-rolling
over a fixed portion of an internally toothed segment 38. Each of the. shafts 31
and 31 is returned into the middle position, in which the middle sleeves m and m¹
of the claw-clutches are out of engagement with the side sleeves of the said
clutches, by means of two disc-sectors 39 and 391 (see Figs. 2 and 6) which are
fixed on the shaft grand which at each revolution move with a radial sharp edge in
between the two legs of each of two forked arms 40, '40' on the shafts 31, 311, so
that in their passage through these forks; they force the respective levers and
shafts into their middle positions; whether the oscillation of the said levers and
shafts have taken place in one or the 'other direction of rotation.
$
Fig. 6 illustrates the two positions of oscillation of the legs of the fork of one
of the arms riz. 40, and shows the sharp edge of the sector 39 at the moment" of
entering the fork at the end thereof. The disc-sectors 39 and '39' are so keyed on
the shaft g and are made of such dimensions that as long as the jacquard-apparatus
B

page_text: is able to act upon the shafts 31 and 31¹, these sectors are out of engagement with
the levers 40 and 40¹.
In order to prevent the middle sleeves m, m² of the claw-clutches, when thrown
out of gear, from accidentally rotating with the shafts w, w¹, which would cause a
wrong setting of the embroidering frame 2, there is fixed to each middle sleeve a
ratchet-wheel 41 or 41' in which engages a pawl 42 or 42' attached elastically to
the framing of the machine.
Instead of the levers a, a¹, inclined surfaces may be employed, which are pushed
parallelly to themselves and which, in the course of their travel or stroke, carry
with them the bars of each set in succession.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. An automatic stitch-determining apparatus for embroidering machines,
wherein two series of bars are provided for transmitting the driving-motion
to the two devices for producing the horizontal and vertical movements of the
embroidering frame, the bars of each series being arranged to be moved end ways
in suitable guide-ways by means of a part that can act upon them after the manner
of an inclined surface so that the strokes of the successive bars gradually increase
in length from one end of the series to the other whereby each of the frame-
operating devices is enabled to have imparted to it at any time the driving-motion
corresponding to a determined length of stitch by coupling the respective driving-
device with that bar, of the series of bars operating that device, the length of
whose stroke corresponds to the movement to be given to the embroidering frame,
substantially as herein before described.
2. A stitch-determining apparatus of the kind specified in the preceding claim,
in which the bars of each set are connected with a lever in such a way that they
can, by the rotation of this lever about its axis, be so moved endways that the
lengths of their stroke will be proportional to their distance from the said axis,
substantially as herein before described.
3. A stitch-determining apparatus of the kind specified in Claim 1, in which, for
transmitting the motion of the bars of each set to one of the frame-driving devices,
there is provided for each set of bars, a rail, which is placed transversely to the
bars and is adapted to be coupled with each of the bars of the corresponding set,
by pins that are movable in the said rail and are moved into the coupling position
by a jacquard-apparatus substantially as herein before described.
4. A stitch-determining-apparatus of the kind specified in Claim 1, in which the
bars of each set are connected with a lever in such a manner that, by the rotation
of this lever about its axis, they can be so moved end ways that the stroke of the
bars will be proportional to their distances from the said axis and in which, for
each set of bars, there is a rail, which is placed transversely to the bars and which
can, by means of pins movable within it, be coupled with each of the bars of the
corresponding set, a jacquard-apparatus being provided for operating the said pins,
substantially as described.
5. A stitch-determining apparatus of the kind specified in Claim 1, in which for
each of the two driving-devices of the embroidering frame there is a double-sided
claw-coupling the two side sleeves of which are adapted to receive simultaneously
the motion transferred by the corresponding set of bars through intermediate
mechanism so arranged that the two side sleeves will receive movements that are
equal in magnitude but opposite in direction, so that the corresponding frame-
driving device will be operated in the one or the other direction according as the
middle sleeve of the claw-coupling be made to gear into the one or the other of
the two side sleeves, substantially as herein before described.
6. A stitch-determining apparatus of the kind specified in Claim 1, in which the
bars of each set of bars are connected with a lever in such a manner that by the

page_text: rotation of this lever about its axis they can be so moved end ways that their strokes
will be proportional to their distances from the said axis, in which for transmitting
the motion of the bars of each set to one of the frame-driving devices, there is, for
each set of bars, a rail placed transversely to the bars and adapted by means of
pins movable within it, to be coupled with each of the bars of the corresponding
set, a jacquard-apparatus being provided for operating said pins, and in which, for
each of the two driving-devices of the embroidering frame, there is a double-sided
claw-coupling, two side sleeves of which are adapted to receive simultaneously the
motion transferred by the corresponding set of bars through intermediate mechanism.
so arranged that the two side sleeves will receive movements that are equal in
magnitude but opposite in direction, so that the corresponding frame-driving
device will be operated in the one or the other sense according as the middle
sleeve of the claw-coupling be made to gear into the one or the other of the two
side sleeves, substantially as herein before described.
7. The improved stitch-determining apparatus for embroidering machines,.
constructed, arranged and operating substantially as herein before described with
reference to and shown in the drawings referred to.
D1
1
TA
1000