Improvements in Embroidery Machines.
Year: 1893

page_text: COMPLETE SPECIFICATION.
Improvements in Embroidery Machines.
I, HEINRICH SPÜHL, of St. Fiden, near St. Gallen, in the Republic of
Switzerland, Engineer, 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 that class of embroidery machines
which are known as "Heilmann embroidery machines and which improved
machine may be adapted to be worked by motive or foot power.
The invention is illustrated in annexed five sheets of drawings, in which―
Fig. 1 is a front view and Fig. 2 a side view of the machine.
Fig. 3 shows the levers and rods actuated by the outer cam groove of the driving
wheel 7.
Figs. 4 & 6 are respectively a plan and side view of the driving mechanism for
motive power.
Fig. 5 shows the same for foot power and Fig. 7 actuated by an electromotor.
Fig. 8 shows the fabric frame with fabric rollers and protection boards arranged
as heretofore and Fig. 9 shows the same arranged in a novel manner.
Fig. 10 is a side view of the fabric rollers, protection boards and thread pull
device as taken from the place of the embroiderer.
Fig. 11 is a front view and Fig. 12 a partial section of Fig. 10.
Figs. 13-24 are views of details which will be referred to hereinafter.
In general the improved embroidery machine possess a peculiar driving mechanism,
characteristic means for the outward travel of the carriage, reduced to about 75 milli-
metres, for the thread pull downwards and for the tensioning of the thread itself and
the governing of the same.
The means which assist in what is called "the treading off" are also a part of this
invention, whilst the parts which effect the same as well as the pantograph and the
remainder of parts necessary for a complete embroidery machine do not present any
novel features and are therefore not particularly referred to in the description.
For the same reason the boring and festooning apparatus has been left out in the
drawing; existing "Heilmann" embroidery machines can be altered to my system
without particular difficulty.
DRIVING MECHANISM.
The strap cone 11 with loose pulley 2 driven from the countershaft cone 1,
transmits motion by means of the bevel wheels 3 to the driving shaft 4, which has a
fly wheel 5 and toothed pinion 6, which latter is in gear with the spur wheel 7,
Figs. 2, 4 & 6. To obtain a uniform displacement of the strap 8 on the two cones I
& the following device has been provided: The arm 10 having a fork 11,
oscillating on the fulcrum 9, Fig. 6, is connected to the starting lever 13, by means
of the link 12, to the side arm 13 of which is fastened a chain or rope 15, and its
other end passed over the pulley 14 and connected to the oscillating fork arm 10',
Thus if the starting lever 13, Fig. 6, is turned to the right both forks 11 & 11' move
to the left, i.c. the former owing to the link 12 and the latter owing to the weight 16
acting onto the arm 10. If the starting lever is turned again to the left, both strap
forks move to the right, the lower fork 11 owing to the slot 12' formed in the
link 12, being left at rest until the upper fork 11' has moved the strap 8 a little to
the right so as to become loose and permit of its being displaced.
The wheel 7, which turns on the shaft 17, has a cam groove 18, Figs. 2, 17 & 18,

page_text: DEVICE FOR THE THREAD PULL.
In embroidery machines in which the thread loop is drawn downwards provision
is made that the thread is drawn at least for a certain distance vertically to the
fabric and to attain such, the following device is provided:-The cam disc 25,
Figs. 1, 2 & 11, previously mentioned, actuates the two cross levers 43 & 43°,
and
which by means of suitable pull mediums 44 & 44, Figs. 1 & 10, move up
down the rails 45 & 45°. When the thread pullers 46, draw downwards the
thread, the respective rails come simultaneously into the top position, so that the
threads guided above the same are drawn vertically to the fabric. As soon as
the thread pullers commence their upward movement, the said rails come into their
lowest position, so that the needles and needle pincers have free access.
In festoon work it is of advantage to raise the front rails 45 above the height of
the needles. For this purpose a second cam 48 is arranged adjustable on the cam
disc 25, by means of the screw 47, Figs. 19 & 20. The cam 48 is formed with a
gap 49 in which lies the projection 50 of the stud 52 turned by the hand lever 51.
If the latter is turned to the left, Fig. 19, the projection 50 forces the cam 48, on
which slides the widened periphery of the bowl 53, downwards, so that the rails 45
are raised above the heights of the needles. If the lever 51 is positioned to the
right, the cam is turned again upwards and the bowl 53 lies on the cam of the
disc 25 which raises the respective rails only to the height of the needle.
DEVICE FOR GUIDING THE THREAD.
The protection boards 54, Fig. 8, heretofore customary, have the drawback that
the thread rubs against the curved part and thereby becomes weak. To obviate
this defect, i.e. in employing straight protection boards, the lower roller 55 of each
pair is not placed vertically below the upper one, but its axis placed in the plane of
the fabric, Figs. 9 & 10. This displacement is particularly necessary to retain the
customary height of embroidery, i.e. so as not to reduce the embroidery space by
the protection boards, as otherwise the vertical movement of the fabric frame
would be limited by the protection boards. To still retain the fabric in a vertical
plane, guides 56 are arranged. In order to cause the thread to be pulled down
same, three
parallel to the protection boards and that they will not rub against the
to four guide supports 58 & 58, Figs. 1, 2, 10, 13 & 15, are fastened on the
carriage tubes 57 & 57 for the thread puller arms 59 & 59ª, the function and
arrangement of which are identical and thus the description of one support only is
sufficient. The thread puller 59, connected movably to the guide support 58, by
means of the link 60, is guided by means of the bowl 62 running in the cam.slot 61,
in such a manner that each point thereof, would describe a line parallel to the cam
slot 61, if the carriage were at a stand still. But as the carriage moves outward
during the pulling of the thread, the thread puller 46 describes no curve, but a line
parallel to the protection boards, Figs. 10 & 13.
An arrangement is provided which prevents the lowering of the thread pullers
until the carriage has run out sufficiently far so that the former does not knock
against the needles. For this purpose the cam slot 61 has a horizontal rest 61ª
which receives the bowl 62 fixed upon the thread puller arm, when the carriage
runs in. At the commencement of the outward run of the carriage an arm 63
employed on the support 58, Figs. 2, 16 & 22, under the influence of a spring,
acting on the boss of the bowl stud 62, Fig. 16, holds the rails 64, which connect
the two thread puller arms 59 together, against the fixed abutments 65 & 65',
Figs. 10 & 11. When the carriage has travelled outwards in distance equal to the
length of the rest, the needles will be sufficiently far away from the fabric, to
permit of the thread pullers passing the same freely. On the inward travel of the
carriage the abutment rail 64 will vice versa abut against the fixed abutments
before the carriage has travelled in completely. This prevents the thread pullers

page_text: free access to the fabric frame.
DACA ZUT we purpose
SLYING
DEVICE FOR THE THREAD Pull.
On the outer side of the wheel 7, Figs. 2, 3 & 18, is arranged a cam groove 67
which receives the bowls 69 & 69, positioned diametrically opposite each other
on the levers 68 & 68ª. The latter have their fulcrums on the covers 72 of the
wheel 7. To the levers 68 & 68 are jointed the vertical rods 73 & 73, which
move alternately up and down and cause the oscillation of the double levers
74 & 743, Figs. 1, 2 & 11. The thread pull mediums on the front of the machine
operated by these double levers being quite analogous with those on the back,
the description is limited to those on the front and it may be remarked that the
pull mediums on one side of the machine are shown at rest, whilst those on the
other side are in function.
The double lever 74, by means of the link 75 moves the fork 76 up and down
which latter imparts to the vertical rod 77, Figs. 1, 2, 10, 11, 12, 14, 15, & 23, an
always equal large movement. in the same direction. The rod 77 carries on a
short arm a trap with two arms adapted to move on a stud 78, Figs. 15, 22 & 23,
the lower part of which is constantly pressed back from the rail 77, by means of
the spiral spring 80. Next to the rod 77 is arranged a second differential rod 81
which is moved by the rod 77 but may be uncoupled therefrom and which carries
a nose 82 with an incline 83. In the normal positions the trap hook 84 of the
trap 79 engages the nose 82 so that at the beginning, i.e. up to a certain way both
rods 77 & 81 move together downwards and draw, by means of the angular
lever 85, shaft 86, lever 87, leg 88 & arm 59, Figs. 1, 10, 11 & 14, the thread
pullers 46 downwards. On each side of the machine are arranged 6-8 thread puller
arms 59, i.e. 3-4 above and 3-4 below, of which the two positioned over each other
are connected together through the rails 61. Each three of the thread puller
arms positioned at the same level, carry on their ends which point towards the
fabric, a thread puller 46 formed of a bar or tube, which serves to form the loops
of a row of threads and to give tension to the threads. The thread puller has
its position of rest above the needle pincers and moves only downwards between
the fabric and needles, when the carriage has nearly completed half of its outward
travel, so that it cannot come into contact with the needles; whilst the carriage
completes its outward travel, the thread puller moves towards its lowest position,
pulls the thread tight and moves, during the short rest of the carriage, upwards
again, so that it will reach its upper position, before the carriage with the needle
pincers has completely travelled in. This advanced movement of the thread
puller is necessary to prevent a stitching on of the same.
In order to cause the throw of the thread pullers to decrease in the same
proportion as the length of the thread, i.e. in order that the travel of the
differential rod 81, shortens in the same proportion, as the length of the thread,
the following shortening device is arranged: Into the carriage tube 57 is screwed
a vertical guide rail 89, Figs. 15, 22 & 23, the upper end of which is fastened
to the guide support 58 by means of the bolt 90. Along side the rail 89 is a
slide 91 which carries the swivel 93 arranged to turn on a stud 92. The swivel 93
is furnished with two contact surfaces 94 & 95 and carries a locking bowl 96

page_text: This
positioned in the slide 91 which presses itself wedge like between the rod 89 and
the inclined inner side 97 of the slide 91, when pressure is exerted onto the
surface 94 of the said swivel parallel to the rail 89 and thus the downward
movement of the slide 91 on the pail 89 prevented. When pressure and pull are
exerted on the swivel 93 in a reverse direction, i.e. upwards, the bowl 96 is
withdrawn, so that the slide 97 can be readily slid upwards on the rail 89.
upward movement of the slide 97 takes place in the same proportion to which the
thread shortens at each stitch and in the following manner: Assuming both
rods 77 & 81 move together downwards, the lower trap hook 98, after a certain
travel of the said rods, abuts against the inclined surface 94 of the said swivel and
is pressed by the latter against the rods 77 & 81, so that the upper trap hook 84
is pressed away from the rods, the nose 82 released and the rod 81 uncoupled
from the rod 77. The rod 77, the travel of which is fixed pushes with its stud 99
against the knee lever 100, Figs. 10, 11, 15 & 23, which locks the double
lever 102 having its fulcrum at 101 with the rod 103, as will be hereinafter more
fully described. On the rod 103 is a spring 104, Figs. 10, 11 & 14, one end of
which is fastened to the rod 103 and the other to an angular lever 85 fixed on
the shaft 86. The rod 103 is guided in the locking bushes 105 & 106 which are
rendered rotary movable, Figs. 11 & 24. On the downward movement of the
rod 77, .e. on the stud 99 coming in contact with the knee lever 100, the double
lever 102 is thus turned in the direction of the arrow Z', Fig. 15, and the rod 103
raised. As long as the rod 77 is coupled with the rod 81 the latter effects a
rigid descent of the thread pullers 46 by medium of the angular lever 85, shaft 86
and lever 87, but which descent does not cause the final thread pull. Whilst
both rods 77 & 81 move rigidly downwards, the rod 103, when not locked with
the double lever 102, is released in the bush 105 by means of the angular lever 85,
but as soon as the stud 99 presses into the knee lever 100, the double lever 102
is locked with the rod 103 by means of the slide 107. As the throw of the
double lever 102 is always the same, the stroke of the rod 103 effected thereby, as
well as the expansion of the spring 104 by the latter, must also remain the same.
The final thread pull for a fixed predetermined tension of the spring 104, must thus
also be the same, independent of the length of the piece of thread. If the
stud 99 comes into contact with the knee lever 100, before the rod 81 has been
uncoupled from the rod 77, the spring 104 will be already partly expanded, before
it can come into action, thus not altering anything in the principal.
Supposing when at the commencement of embroidering, the needles have been
pushed from the front side of the machine through the fabric and their fresh
thread pieces have been delivered to the back needle pincers and a stitch made in the
usual way the rod 77, Fig. 15, with the aid of the means described will be lowered,
after the needles have been delivered to the front needle pincers and the front
carriage has travelled in a little. The trap 79 draws downwards rigidly the rod 81
and with it also the thread pullers 46 until their ends 98 come into contact
with the incline 94 of the swivel 93. The trap hook 84 will thus be
pushed back and the rod 81 uncoupled from the rod 77. The stud 99 of
the rod 77 presses onto the knee lever 100 and couples the double lever 102
with the rod 103, which is then raised by the oscillating lever 102. The
expansion of the spring 104 thereby completed, causes through the aforesaid
intermediate connections, an elastic pull of the rod 81 also of the thread pullers 46
downwards and thus produces the final pull of the threads desired. A portion of
the thread having been used for the first stitch it is correspondingly shortened, so
that the thread puller cannot make its full throw and the rod 81 has descended
correspondingly less. When pulling the rod 77 up, the trap hook 98, which is
pressed from the rods 77 & 81 by the spring 80, positions itself under the swivel
projection 108, disengages the locking bowl 96 and lifts the slide 91, until the trap
hook 84 runs off the incline 83 of the nose 82, whereby the trap hook 98 leaves
the swivel projection 108 simultaneously. It will be evident that the higher up
the rod 81 stops, i.e. the larger the consumption of thread has been by the

page_text: preceding stitch, the larger the travel of the slide 91 will be. The travel of the
slide 91 is thus proportionate to the consumption of thread for each stitch. Owing
to the ascent of the slide 91 the trap hook 98 is pushed correspondingly sooner
from the incline 94 against the rods 77 & 81 on the successive descent of the
rod 77, and the rod 81 also uncoupled correspondingly sooner from the rod 77, so
that the former stops in a little higher position, than previously. On the second
ascent of the rod 77 the trap hook 98 will raise again the slide 91 in proportion
to the consumption of thread, before the hook 84 is forced back by the nose 82.
This repeats itself on the front and back side of the machine until the piece
of thread has been used up. and the slide 91 has arrived in its highest position.
As soon as the trap hook 84 has passed the incline 83 of the nose, it will again
fall into the latter." At this moment the nose 109, Figs. 1, 10 & 11, at the
bottom of the rod 77 comes also into contact with the slot 110 of the rod 81 and
lifts the latter to its original height.
When the thread puller has a large throw the co-operative action of its weight,
in the pulling of the thread, is not considerable (see dotted position Fig. 14) owing
to its unfavorable position. The lever arm on which the spring 104 acts is
therefore so much more favorable.
By a small throw of the thread puller the weight in advance of the same comes
however more to the front, in lieu of which the lever arm, on which acts the
spring 104, is less favorable. By a large or small throw of the thread puller, i.e. by
a long or short piece of thread, the pull of the thread will thus be always the
same.
To prevent an accidental engagement of the trap hook 84 in the nose 82, if the
rod 81 when arrived in its lowest position, should lift a little, owing to repulsion of
the thread pullers from the thread, a device is employed which keeps back the
hook 84 until the rod 77 has arrived in its lowest position. For this purpose an
angular lever 111, Figs. 15 & 22, is arranged on the rod 77, upon one arm of which
acts the one end of the spring 80 and the other arm of which is furnished with a
nose 112 and a finger 113. Thus when the rod 77 descends and the hook arm 98 is
pressed from the swivel surface 94 against the rod 77, the lateral extension 114 of
the hook arm 98 catches behind the nose 112, Fig. 22, so that the double trap 79 is
held in its vertical disengaged position. When the rod 77 is in its lowest position,
the finger 113 pushes against the carriage tube 57, see Fig. 15, whereby the
horizontal arm of the angular lever 111 will be lifted a little so that the lateral
extension 114 is liberated and the trap 79, brought again to its required inclined
position by the spring 80.
The device named which permits a periodical locking of the double lever 102,
Figs. 10, 11, 15, 23 & 24, with the rod 103 embodies the following features:-In the
double lever 102 is employed a spiral spring 115 which presses upon the projection 116
of the slide 107 guided laterally in the lever 102. A second lateral projection 117
engages under the double lever 102 in such a manner, that the same can receive the
pressure of the knee lever 100 arranged to oscillate in the lever 102. The slide 107
carries on the end which points to the rod 103 a press bowl 118. On the locking
bush 105, which is adapted to oscillate in the lever 102, is arranged a locking
piece 119, the surface 120 of which is formed cylindrically to conform with the
axis of rotation of the bush 105 and receives the pressure of the slide 107 and the
other concave surface 121 presses the rod 103 into the bore of the bush 105 which
is enlarged in section conically (Fig. 24). Thus if the stud 99 presses on the long
arm of the knee lever 100, the shorter arm thereof moves the slide 107 against the
rod 103 so that through the pressure of the bowl 118 onto the locking piece 119,
the rod 103 becomes locked with the bush 105. Whilst the lever 102 oscillates in
the direction of the arrow Z³, the bowl 118 can roll on the cylindrical surface 120,
without interrupting the pressure exerted onto the locking piece 119. As soon as
the pressure on the long arm of the knee lever 100 ceases the spring 115 throws
back the slide 107 whereby the rod 103 and bush 105 become unlocked.
By means of the spiral spring 122, one end of which is fixed and the other end

page_text: hooked to the double lever 102, the oscillation of the lever 102 is prevented before
the locking of the rod 103 in the bush 105. The downward inovement of the
lever 102 is limited by means of the set screw 123. In order to regulate the amount
of thread pull as required from time to time a governing device is employed, which
5 permits in a handy and quick manner the variable expansion of the spring 1C4.
For this purpose the fulcrum stud 101 of the double lever 102 is fastened upon the
vertically adjustable rail 124, Figs. 10 & 11, which carries on its upper end a
bowl 125 and is suitably guided vertically. The bowl 125 rests on an eccentric 128,
which is actuated by means of the hand wheel 126, Figs. 11, 21 & 23, and shaft 127,
which on being turned to the left, Fig. 10, lifts the bowl and thereby the rail 124
with everything suspended thereon. Owing to the higher position of the knee
lever 100, the stud 99 will reach it sooner, which has for its consequence a
larger throw of the lever 102 and a correspondingly stronger tension of the
spring 104.
Vice versa on turning the eccentric 128 to the right the rail 124
will be lowered whereby the throw of the lever 102 will be correspondingly
shortened and the tension of the spring 104 decreased. The normal tension, i.e.
the tension of the spring 104 when at rest can be regulated by the nut 129 on
the rod 103. 130 is a ring adjustable on the rod 103, which resting on the
guide bush 106, limits the downward movement of the rod 103 effected by the
spring 104 on the unlocking of the rod 103.
When feeding the fabric or also otherwise it happens that the piece of thread
before being quite used up must be cut off. To prevent the cut thread from
being drawn quite through the fabric by the thread pullers, a device is provided
by means of which the throw of the thread pullers can be correspondingly
shortened. On the governor shaft 127 is mounted loosely on angular lever 131,
Figs. 1, 11, 21 & 23, the position of which can be determined by a click which
engages a segment 132 fixed to the carriage. The short horizontal arm of the
angular lever 131 carries a stud 133 adapted to be gripped by the hook arm 135,
fixed onto the hollow shaft 134. An arm 136 also fixed onto the latter, is jointed
by means of the leg 137 to the rod 81. The up and down movement of the
rod 81 produces therefore an oscillation of the arm 136. Thus if the latter
reaches the stud 133 sooner or later, the travel of the rod 81 and thereby also
that of the thread pullers will be more or less shorter. If it is intended to
continue embroidering with the thread cut off and prevent the end of the thread
being drawn through the fabric, the angular lever 131 is set back a few teeth
(in Fig. 21 to the right) whereby the throw of the thread pullers is limited.
In embroidery machines with automatic driving it is of advantage to build
the machine considerably longer than heretofore; it will however be necessary
to employ on the opposite end of the machine the thread puller, mediums, the
hooks 76, the rods 77 & 81 as well as the other mediums necessary for the pull.
WORKING OF THE MACHINE.
In this embroidery machine with automatic driving the embroiderer has only
to guide the pantograph and to set the governing device for the thread pull.
The fro and to travel of the carriage is effected automatically by means of the
oscillating levers 21 & 21ª actuated by the cam of the spur wheel 7, in connec-
tion with the links 33 & 33* and the levers 34 & 34ª, the opening and closing
of the needle pincers taking place also automatically by means of the projection 26
and leg 27. Assuming the needle pincers of the front carriage have hold of the
needles, the front carriage 37 travels outwards. The thread puller remains in
its upper position of rest, until the carriage has made a travel equal to the one
described by the horizontal rest of the cam slot Whilst the carriage completes
its outward travel, the rods 77 & 81 descend and thereby also the thread pullers,
which pull the threads formed into loops downwards. When the trap arm 98
pushes against the swivel 93, the rod 81 is uncoupled from the rod 77, whereby
the rigid movement of the former ceases. The expanded spring 104 acts then

page_text: At the
onto the thread pullers and performs the pulling of the threads onto the fabric.
The thread pullers 46 remain in their lowest position until the nose 109 of the
rod 77 has engaged the slot 110 of the rod 81 and pulls the latter upwards,
whereby the thread pullers arrive again at their upper position. In the mean-
time the double trap 79 has moved the slide 91 upwards in distance equal to
the decrease of the length of thread, but the double trap 79 is then brought
out of contact with slide 91 by means of the nose 82 of the rod 81.
beginning of the inward travel of the carriage, the abutment rails 45, which have
been raised during the pull of the thread, are lowered. Before the carriage
has travelled in completely the rails 64 abut against their abutment 65 & 65',
so that the thread pullers are checked in their movement towards the fabric.
At the end of the travel of the carriage the abutment rails 64 force the guide
bowls 62 of the thread puller arms 59 into the horizontal rest 611 of the
cam slot 61. The needle pincers of the back carriage then receive the needles
and the same functions repeat themselves at the back of the machine.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim, is―
1st. The method of guiding the thread pullers, which form the thread loops, in
such a manner that the thread pullers are at rest at the beginning of the outward
travel of the carriage, during the completion of the latter are guided parallel to the
straight protection boards and on the inward travel of the carriage can be stopped
in front of the fabric, substantially as and for the purpose set forth.
2nd. The method of effecting the pull of the threads in such a manner, that the
rigid motion of a rod which actuates the thread pullers can be interrupted previous
to the final pull of the threads drawn to a loop by uncoupling it from a rod with a
fixed lift and the final pull of the threads on the fabric is performed by a spring
having a fixed expansion acting upon the thread pull mediums, substantially as and
for the purpose set forth.
3rd. An embroidery machine characterised by a device for the uniform
displacement of the strap on the counter shaft cone and the driving cone, consisting
of the oscillating arms 10 & 10¹ carrying the strap forks 11 & 11', the lower arm
of which is operated, through the leg 12 having a slot 12¹, by the starting lever 13
and the upper arm of which, connected by a pull medium to the starting lever 13,
is under the influence of a weight 16, substantially as and for the purpose set
forth.
4th. An embroidery machine characterised by the driving wheel 7 with cam
groove 18 and the oscillating levers 21 & 21" actuated by the bowls 19 & 19" from
the cam groove 18, which levers turn the pin rollers 35 & 35ª by means of the
links 33 & 33ª and arms 34 & 34ª and effect the fro and to travel of the carriage,
substantially as and for the purpose set forth.
5th. An embroidery machine characterised by the double clutch 38 & 38*,
rendered laterally movable on each of the pin roller shafts and rotary therewith
and the crank handle 40 placed loosely onto either of the pin roller shafts 39 & 39",
which clutch can be coupled with or uncoupled from the boss of the arm 34 & 34*
or the crank handle 40, as may be required to move the carriage automatically or
by hand, substantially as and for the purpose specified.
6th. An embroidery machine characterised by the projection 26 fixed onto the
driving wheel 7, formed in such a mauner that the leg 27 furnished with bowls 28
& 28' and guide slot 27' and connected with the fork lever 29, is moved alternately
from the left to the right and that in the first case the needle pincers on the right
are closed and those on the left are opened by means of the leg 30 and angular
lever 31 and in the latter case the opposite takes place, substantially as and for the
purpose set forth.
7th. An embroidery machine characterised by the guide supports 58 fixed onto
each carriage tube, with upper and lower cam slots 61, the thread puller arms 59,

page_text: guided in the cam slot 61 by means of the bowl 62, connected movably to the
supports 58 by a link 60, which thread puller arms owing to the said cam and
outward travel of the carriage, impart to the thread pullers, a motion in a straight
line, parallel to the protection boards 54 and motion to the shaft 86 mounted in the
supports 58, for the joint movement of the thread pullers, substantially as and for
the purpose set forth.
8th. An embroidery machine characterised by the horizontal rest 61' in connection
with the cam slot 61, the spring lever 63 fixed adjustable on the support 58 and acting
onto the bowl stud 621, the abutment rails 64 connecting together the thread puller
arms 59 positioned over each other and the fixed abutments 65 & 65¹ arranged in
such a manner, that during the first half of the outward travel of the carriage the
abutment rails are forced against the fixed abutments and the thread pullers are
retained at rest and that the rails 64 abut against their abutments before the thread
pullers come into contact with the fabric, substantially as and for the purpose set
forth.
9th. An embroidery machine characterised by a device for the positive action of
the thread pullers 46 which form the thread loops and for the successive shortening
of their throws, consisting of a cam groove 67 arranged on the driving wheel 7, the
levers 68, 73 & 74, the leg 75 with fork hook 76, carrier rail 77, with a fixed
vertical course and double trap 79 under the influence of a spring, the differential
rod 81 adapted to be engaged by the rod 77 and uncoupled therefrom, having a
nose 82 and a slide 91 vertically adjustable on the guide rail 89 and provided with
a swivel 93 and locking bowl arranged in such a manner that when the double
trap 79 comes into contact with the swivel 93 it will liberate the rod which actuates
the thread pullers through the lever system 85, 86, 87, 88 & 59, and on the ascent
of the rod 77 lifts the slide 91, in proportion to the thread shortened by each stitch
by engaging the swivel 93 and disengaging by the nose 82, substantially as and for
the purpose set forth.
10th. An embroidery machine, characterised by a device for the elastic and final
thread pull on the fabric, consisting of a double lever 102 furnished with a knee
lever 100 and locking device 107, 118, 119 & 105, and of a spiral spring 104 acting
upon the pull mediums 85, 86, 87, 88 & 59, partly guided on the angular lever 85
and partly guided on a rod 103 arranged to rotate in bushes 105 & 106 adapted to
be locked with the double lever 102, in such a manner, that a stud 99 fixed on the
carrier rod 77 and pressing against the knee lever 100 causes the slide 107 employed
on the double lever 102, under the influence of a spring, to be locked to the rod 103
and afterwards the double lever, which is drawn down by a spring 122, expands the
spring 104, substantially as and for the purpose set forth.
11th. An embroidery machine characterized by a device for governing the
amount of the thread pull, consisting of an eccentric 128 actuated by a shaft 127
and hand wheel 126, and a vertically movable rail 124, carrying the fulcrum of the
double lever 102 and resting with its bowl 125 on the eccentric 128, substantially as
and for the purpose specified.
12th. An embroidery machine, characterized by a safety device, which prevents the
re-engagement of the double trap 79 with the nose 82 of the rod 81, consisting of
an angular lever 111, arranged movably under the influence of the spring 80, of the
trap 79 on the carrier rod 77, the horizontal arm of which is furnished with a
finger 113 and a nose 112, in such a manner, that the lateral extension 114 of the
double trap 79 catches behind the nose 112, on the same being disengaged by the
swivel 93, and in the lowest position of the rod 77, can move again into its
unsecured position, owing to the catch 113 coming into contact with the carriage
tube 57, substantially as and for the purpose set forth.
13th. An embroidery machine characterized by a governing device for the throw
of the thread pullers, consisting of an angular lever 131, arranged to turn loosely
on a governor shaft 127 and furnished with an adjusting arrangement 1311 & 132
and catch studs 133 and of a hollow shaft 134 mounted on the shaft 127 and having
a catch arm 135 and lever 136 connected to the rod 81, by means of the leg 137,
B

page_text: which catch arm 135 retains in position the rod 81 and thereby the thread
pullers 46, as soon as it has reached the stud 133, substantially as and for the
purpose set forth.
14th. An embroidery machine characterized by the vertical shaft 23 rotated by
means of the bevel wheels 22 & 24 and having a cam disc 25, and the abutment
rails 45 moved vertically from the cam disc 25, by means of the lever 43 and pull
mediums 44 which during the pull of the thread in the raised position permit of
pulling the thread vertically to the surface of the fabric and during the inward
travel of the carriage are in a lowered position, the cam disc being furnished with a
second adjustable cam 48, which effects the lift of the front abutment rods in
festoon work, above the height of the needles, substantially as and for the purpose
set forth.
15th. An embroidery machine characterized by the straight protection boards 54
positioned at an incline to the fabric and the lower fabric rollers 55 of each roller
pair, the shafts of which are positioned in a line with the fabric, for the purpose of
permitting the fabric frame to play freely and suitable guiding mediums 56 being
arranged to retain the fabric at a vertical level, substantially as set forth.
Dated this 15th day of May 1893
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.