Improvements in Embroidering Machines.
Year: 1888

page_text: Date of Application, 7th Feb.. 1888
Specification Accepted, 13th Apr., 1888
Improvements in Embroidering Machines.
I, OLIVER LMRAY of No. 28 Southampton Buildings, Chancery Lane, in the County
of Middlesex, Follow of the Institute of Patent Agents (a communication to me from
abroad by Roswell Tenney Smith, Manufacturer, of Nashua in the County of
Hillsborough and State of New Hampshire, United States of America) do hereby
declare the nature of this invention, and the manner in which the same is to be
performed to be particularly described and ascertained in and by the following
statement:
The invention relates to that class of embroidering machines commonly known as
the Heilmann, or Swiss machines, wherein all the several movements, adjustments and
reversals are offected by an operator guided by a pantograph. The purpose of tho
prosent invention is to render the mechanism automatic so that an operator can be
dispensed with whilst the efficiency of the machine is improved.
"The movements rendered automatic are as follows:-The stitch adjustments of the
tambour frame are governed by a moving "stencil" or pattern.
The reversal of the needle carriage upon the railway is governed by the tension of
the working threads through the make and break of an electric circuit, the retrograde
movement of the needle carriages being thus checked at the instant when the stitch is
drawn up to, or into, the fabric, so that the tension is uniform and the work is
regular.
The transfer of the needles from the one carriage to the other is also effected by
automatic devices, the mechanism being such that the needle clamps release the needlos
in one carriage and lock them in the other, the locking being a little in advance of
the release.
The reversal of the "railway" is also governed by the tension of the working
threads, and the stitch adjustment is controlled by a stencil.
The transfer of the needles from one carriage to another is effected by devices
worked by the belts by which the carriages are moved in one direction, and thus an
operator is not required except to supply the needles with thread and for similar
purposes.

page_text: Generally the invention contemplates governing the action of an embroidering
machine by the make and break of an electric circuit or circuits by the automatic
devices hereafter described.
It also includes automatic means for checking the needle carriages in their approach
toward the web when it is in motion, the needles being thus prevented from piercing
the fabric while the tambour frame is making the stitch adjustment.
It also includes means for effecting the reversal of the railway at any required
tension, so that the same machine may be adapted to work upon different fabrics and
to produce various patterns, and the two carriages may be adjusted to work at a
different thread tension if desired.
The accompanying drawings shew the construction and arrangement of the
mechanism.
Figure 1 is a plan showing the general arrangement of the machine.
Figure 2 is an elevation of the tambour frame and its adjusting devices, with the
stencil driving mechanism.
Figure 3 is a side view shewing the central part of fig. 1, portions of the mechanism
being omitted.
Figure 3 shews part of the driving shaft of the railway with its pulloys and
clutches.
Figure 4 is an end elevation to an enlarged scale of the head of one of the needle
carriages.
Fig. 5 is a part plan of the end portion showing only the carriage.
Figs. 6, 7 and 8 are respectively plans and a back olevation illustrating the action
of the electric switch shown in Figs. 4 and 5.
Fig. 9 is a front view of the needle clamping jaws.
Fig. 10 is a side view of one of the central standards, showing the electric switch
mounted thereon.
Fig. 11 is a back view of the standard.
Fig. 12 is a perspective shewing the centering plates connected with the guard lever
in figs. 10 and 11.
Fig. 13 is a slide elevation, enlarged of the clutch throwing pulley, locking the
clutclies which reverse the railway.
Fig. 14 is a plan of the same.
Fig. 15 is a side view of parts shown in figs. 13 and 14.
Fig. 16 is a diagram shewing the stencil driving mechanism and its connections,
with part of the electric circuits.
Fig. 16 is a view of the stencil driving devices and a diagram of the circuit by
which the stencil is started.
Fig. 17 is a part plan of the underside of the stencil driving mechanism.
Fig. 18 is a plan of the stencil separately.
Fig. 19 is a detail elevation and plan showing certain modifications in construction
of the electric switch shown in Figs. 10 and 11.
1 is the frame of the machine having at its ends shafts 2 and 2ª the latter driven
from a motor shaft 3. Loose on the shaft 2ª are two pulleys 4 and 5 connected to
pulleys 8 on the shaft 3 by a straight belt 6 and a crossed belt 7.
On the shaft 2ª are two clutches 9 and 10 adapted to lock the pulleys 4 and 5 to
the shaft, each clutch being worked separately by a lever 11, pivotted at 14, each
lever having a fork 12 which engages with a groove 13 on the clutch.
According as the one or the other pulley 4 or 5 is clutched, the shaft 2" is
made to revolve in the one or the other direction.
At each end of the shaft 2 are pulleys 15 connected by belts 16 to pulleys 17
on the shaft 2.
Extending between the bearings of the shafts 2 and 2ª are rails 18 on which
the frames or supports 19 of the needle carriages, slide or roll.
The bolts 16 pass freely through the supports 19 but have fixed on them
blocks 20 (see Fig. 3) which engage with the supports 19 and carry them in one
direction on the rails 18. There are two separate needle carriages, one on each

page_text: side of the web on which the pattern is to be worked, and the blocks 20 reciprocating
between the supports of the carriages cause them to recede from the web, their
movement in the other direction being produced by weighted cords 21, running
over pulleys 22. As the two needle carriages are alike one only need be described
and as each carriage is merely a series of needle clamps and the parts holding them,
it is not necessary to show in detail moro than a part of one of the carriages.
•
The supports 19 of each carriage are connected by shafts 23 upon which are
mounted the carriage arms 24. These arms support a rigid needle-jaw 25, extending
from end to end of the carriago and having at regular intorvals "V" shaped seats or
grooves 26 (fig. 9) which receive the needles 27.
The number of these needles may vary, but each carriage generally is capable of
carrying from one thousand to sixteen hundred.
Upon lugs 28 on the arms 24 are pivoted levers 28" (seo Figs. 4 & 5) which
carry the movable jaw, or jaws 29, this jaw being either a single bar or a series of
separate clamping fingers, one for each needle. The movable jaw 29 is moved in one
direction by cams 30, acting on the lovers 28" and in the other direction by springs 31.
The cams 30 are mounted on a cam shaft 32 journaled in lugs 33, and operated by
levers 34 on each end of the shaft which projects beyond the arms 24.
Connecting bars 35 jointed to the lovers 34 extend down to links 36, each bar
having a projecting stud 37.
The carriages have double pointed needles 27, with an eye in the middle; as ench
carriage arrives at the web all its noedles aro driven through the fabric, the free ends
of the needles passing into the needle grooves 26 of the carriage, on the other side of
the web. Outside the middle standards of the machine are placed posts 39 which
support a rock shaft 40 carrying levers 41 having a fork 42 at each end, and also
arms 43 having forked ends 44 and projecting upward toward the belts 16. As the
needle carriage arrives at the web it is arrested by a stop-bar 45, the stud 37 being
then engaged with the fork 42. At the same time the blocks 20 leave the supports 19
of the carriage just stopped, and begin to travel toward the supports 19 of the carriage
on the other side of the web. As they travel they engage with the forks 44 of the
arms 43, and swing over the levers 41 by the forked ends 42 of which acting on the
studs 37 one of the connecting bars 35 is thrown upward and the other downward.
This movement operates the cams 30 on both carriages at the same time, but in
opposite directions, releasing the needles in the carriage by which they have just been
driven, and locking thom in the other.
The blocks 20 then pass out of the forks 44 and engage with the supports 19 of
the carriage last named and cause it to recede from the web. After each operation
the levers 41 are left in position for the next succeeding transfer of the needles.
When the carriage has receded from the web far enough to draw the threads up
to, or into, the fabric and properly form the stitch, its movement is reversed, making
it approach the web and transfer its needles back to the other carriage.
This is done in the following manner.
The clutch levers 11 for the pulloys 4 and 5 which run loose upon the shaft 2"
in opposite directions are moved to lock their clutches, alternately, by the arrange-
ments shown in figs. 13, 14, and 15. 46 is a shaft journalled in bearings 47 and
driven continuously by a pulley 48 by a belt from a pulley 49 on the power shaft.
Loose on the shaft 46 is a pulley 50, held between friction disks 51 which turn
with the shaft and may be forced against the pulley 50 by nuts 52 so as to grip it
with any required degree of friction.
A belt 53 is carried partly around pulley 50 and one end is secured to the lever
throwing the clutch, the other end being loose.
A bracket 53ª supports the belt above.
A casing 54 partly surrounds the pulley 50 and supports the belt close to, but not
in working contact with the pulley. On the front of the casing 54 is pivoted a
lever 55 having at one end an armature 56 and at the other a roller 57 which bears
against the free end of the belt 53. Near the armature 56 is placed an electro
magnet 58.
When this magnet is excited it presses the roller 57 against the

page_text: belt 53 causing it to engage with the pulley 50 which instantly throws the clutch
lever 11 and locks the pulley 4 (or 5 as the case may be) with the shaft 2. When
the magnet 58 is cut out of circuit the roller 57 releases the belt 53, which aided by
a spring 59 drops from the pulley 50. After the clutch lever has been thrown its
full stroke the pulley 50 can slip between its discs 51 maintaining the pull on the belt
and holding the clutch engaged as long as the magnet 58 remains in circuit.
Each of the levers 11 is worked by an independent arrangement of this kind. In
fig. 3ª which illustrates the control of the machine by electric action, the lovers 11
are shown straight and having armaturos attracted by magnets. In practice, it is
better to employ a bell crank, as shown at the right hand of fig. 16, and in fig. 1.
Thus in fig. 1, the clutch lovers 11 are actuated by bell cranks 11ª rocked by the
belt 53. This modification is simply for the purpose of obtaining more power.
fig. 1 only one of the pulleys and electric devices for reversing the shaft 2ª is shewn,
the others being merely duplicates.
In
The magnets 58 are connected with one or more batteries by a switch worked by:
the tension of the working threads produced by the carringes alternately. Each
switch and its operating devices being the same on each carriage, one only need be
described.
Upon the ends of the shaft 32 outside the cam levers 34, are mounted arms 60
curved over in front of the needles and carrying a tension bar 61. These arms are
mounted on sleeves 62 free to turn on the shaft 32; one of the sleeves carries a
ring 63, which may be turned round upon the sleeve and can be fixed thereon by a
set screw 64. The ring 63 has arms 65 between which is pivoted a switch bar 66
having an insulation 67. A spring 68 presses the switch in one direction. On a
bracket on the carriage arm 24 is mounted a contact post 69 having an adjustable
contact point 70. One of the circuit wires is attached to the switch 66 and the other
is in connection with the contact 70. By raising or lowering the bar 61 the switch 66
is moved toward or from the contact 70 closing the circuit at a certain point of the
movement.
This contact however, is only momentary, whereas in order to throw the clutch
lever 11 and hold it until the carriage reaches the web the circuit of the magnet 58
must be maintained for a time.
For this purpose, on the central standards 71, or elsewhere, is mounted a second
switch 72 (see Figs. 10 and 11) which has an armature 73 moving between the
opposite poles of electro magnets 74 and 75. The switch 72 is insulated and in con-
nection with one pole of the battery by wire 76. On each side of it is a contact 77
one of which closes the circuit of one of the magnets 58 and the other closes the
circuit of the other magnet. The switch lever 72 carries a weight 72ª above its
fulcrum 78 so that when its armature 73 is attracted by one of the magnets 74,
or 75, the switch is brought against one of the contacts 77 and held there by the
weight 72 after the attraction of the armature 73 has ceased. The magnets 74 are
in circuit with the switch 66 on one needle carriage and the magnets 75 with the
switch of the other carriage, and thus the momentary closing of the circuit by the
rise of the tension bar 61, excites the magnet 74 (or 75 as the case may be) and
throws the switch 72 which is held against one or other of the contacts 77 until the
other needle carriage reaches the limit of its back stroke and closes the circuit for
the opposite magnet. In this way the circuits of the magnets 58 are alternately made
and broken and the successive reversals of the "railway" are effected.
As the carriages are brought up to the web the tension bars 61 must be raised
out of the way. This is done by fingers 144 mounted on the arms 60 and engaging
with pins 145 on a rigid support 146. As the tension bar rises the switch 66 is
thrown against the contact 70, but this is of no importance as the circuit in which
the switch lies is already closed and will remain so until the carriage stops.
After the retrograde movement begins, however, the tension bars are thrown down
again, and as the switch swings towards the rear of the carriage it must not make the
circuit at contact 70 as that would immediately cut the excited magnet 58 out of
circuit bring the other magnet in, and carry the needle carriage back to the web.

page_text: To avoid this, a throw off arm 147 (see figs. 4, 5, 6 and 7) is pivoted on a stud 148
and thrown against the insulated part of the contact post 69, and held there by a
spring 149, coiled on the stud 148.
This arm is non-conducting and as the switch 66 sweeps forward, when the tension
bar is thrown up, it strikes the throw off 147, turns it forward passes and releases it.
The throw off swings back against the post 69 and as the tension bar is again brought
down in front of the needles and upon the threads, the pivoted switch slides over the
edge of 147, is thrown outward in opposition to the spring 68, and passes to its normal
position without making contact with the post 69.
Between the reversals of the railway, the tambour frame must be moved to bring
the web into position to receive the next passage of the needles, and this must be done
while each carriage departs from and returns to the web.
This is accomplished as follows :
The tambour frame 79 (see fig. 2) is hung between the standards 71, supported by
wires 80, from a rail 81, having horizontal movement on rollers 82, which are
journalled in frames 83, that move vertically in guides in the truss frame 84, which
connects the standards 71.
Upon the truss frame are mounted levers 85 the outer ends of which lie under
friction rollers 86 in the frames 83.
The inner ends of the levers 85 are raised and lowered by a traveller 89 moved by
a nut 87 screwed on a vertical shaft 88.
The screw shaft 88 which is journalled in a support 90 can be turned in either
direction by pulleys 91 and 92 as will hereafter be shown.
The rail SL is moved on the rollers 82 by a horizontal screw 93 one end of which
bears on an arm 95 on a rail 81. The screw 93 is prevented from turning by a koy
in its bearing 94 and on it is a double pulley 96. 97. working as a nut 98 moving
the shaft 93 horizontally. A weighted cord 99 attached to the rail 81. and running
over a pulley 100 draws the rail one way.
The double pulley 96. 97. is driven by straight and cross belts from pulleys 96*
and 97 which are loose on the constantly revolving shaft 3 but are locked to it by
clutches worked by levers 104 in the same way as already described in respect of the
pulleys 4 and 5, and operated by similar means, that is, by friction-slip pulleys like
that shown in Figs. 13, 14, and 15 and driven by pulleys 49" on the shaft 3.
The proper clutch lever is selected and brought into action, in order to move the
rail 81. and tambour frame 79. to the right or to the left in the following manner.
Each of the levers 104" being moved by a slip pulley brought into action by
switching one or the other of electro magnets into a circuit the circuit wires of these
magnets are connected from one pole of the battery to a conductor 105. (fig. 16).
The other wires are connected respectively to separate fingers 106. insulated from
each other. Between the conductor 105 and these fingers is moved a " stencil 22 107
of non-conducting material such as paper, having openings 108 of varied arrangement
and length. As these openings pass the fingers 106 they close the circuits of their
magnets alternately, the movement caused by the excited magnet depending upon
the length of the opening in the stencil and the speed at which it travels.
The stencil 107. (Fig. 18) is a long sheet of paper or other non-conducting material
having five longitudinal sets of perforations marked a, b, c, d, and e.
The set a,
and b, close the circuits of the magnets by which the pulleys 101, and 102 are
brought into action, and the set c, and d, close the circuits of magnets for thic
pulleys 96 and 97 which drive the pulleys 96 and 97. for moving the tambour frame
horizontally.
The perforations in a and bare never brought side by side, nor in c and d, but a
vertical and a horizontal movement may take place simultaneously.
The stencil 107. being moved in the direction of the arrow, fig. 16, the perforations
required for the stitch adjustment pass the fingers 106. simultaneously, being in the
same transverse line. For example if an adjustment upward, of one tenth of an
inch and to the right of a half inch, are needed, then the openings in the sets a and
are of proportional lengths as indicated by the shaded openings, Fig. 18.
"

page_text: The stencil is moved by any suitable mechanism, as for instance by two rollers 110
and 111. The roller 110 is driven from cone pulleys 112, and 113, through an
intermediate pulley 112 which is locked to its shaft by a clutch 114 and clutch
lever 115 worked as already described by a magnet 116, attracting an armature 116ª
on the lever, or it may be worked by a slip pulley, as described in reference to Fig. 13.
The magnet 116 is in a circuit closed by a finger 117 governed by openings 118 in
the set e of the stencil, these openings being somewhat longer than those in the other
sets in order to make sure that the action of the circuits closed by these openings is
complete and that these circuits are opened as soon as the stitch adjustment is
finished. As soon as the finger 117 reaches the end of an opening in series e the
circuit of the magnet 116 is broken and the stencil is stopped the clutch 114 being
thrown off by a spring 119 acting on the lever 115. During the time the stencil
rests, the needles are passed through the web and transferred from one carriage to the
other. The initial movement of the stencil for the succeeding stitch adjustment is
effected as follows:-
On one of the rails 18, on each side of the central standard 71, is placed a switch
composed of a contact 120 (see Figs. 3 and 16") and a pivoted switch lever 121. one
end of which lies in the path of a prolonged boss 122. on the support 19 of the
needle carriage.
On this end of the lever 121. is pivoted a dog 123, held against a lug 124, on
the lever by a light spring 125. The switch is in the circuit of the magnet 116,
and as the needle carriage recedes from tho web the boss 122 strikes the dog 12%,
closes the circuit and excites the magnet 116 (see Figs. 2 and 16") holding the circuit
closed until the stencil has passed over the space separating one transverso set of
openings in the stencil from the next. As soon as this is done the finger 117. passes
through a hole and the magnet 116 being now switched on the connection through
the switch lever 121. which is not needed is broken by the boss 122 passing off the
dog 123. As the carriage comes toward the web the boss 122 trips the dog 123
without operating the lover 121. The switches 121. are at such a distance from the
web, on each side that the circuit is not made until the carriages have moved far
enough to fully withdraw the needles from the web.
By shifting the belt on the cones 112 and 113, the speed of the stencil may be
varied as required and thus the stitch adjustments of the tambour frame may be made
of greater or less extent; for example an opening in the stencil which, at one rate of
spood, gives a stitch adjustment of half an inch will when the stencil moves at twice
the speed give a movement of only a quarter of an inch to the tambour frame.
In this manner may be produced patterns which though alike in design vary in sizo
to any desired degree.
The means described for effecting the reversal of the railway may obviously be
applied to the Heilmann, or Swiss machines, and the pantograph used in that kind
of apparatus may be operated, automatically, by a stencil such as has been described,
the several movements of the pantograph index being effected like those of the
tambour frame.
To avoid confusion the devices for actuating the clutch levers 104 are not shown,
but they are precisely like those used for the clutch levers 11 and shown in Figs. 13,
14 and 15. The pulleys which throw each of the clutch levers 104, are worked by
pulleys 49 on the shaft 3, and the clutch levers 104ª which lock the pulleys 96*
and 97 to the shaft are thrown by slip pulleys, driven by pulleys 49 on shaft 3.
To prevent the needle carriages from approaching the web so closely as to drive
the needles into it while the tambour frame is in motion the devices are employed as
shown in Figs. 10 and 11. A lever 126 pivoted on the central standard 71. has a
fork 127. in which lies the switch 72, by the action of which the needle carriages
are reversed, as described. The fork is wide enough to allow the switch to work
without obstruction, and it is centered by plates 128 and 129 each having a finger 130
engaging with opposite edges of the lever 126. These plates are hung on the
pivot 131 of the lover and are drawn in opposite directions by springs 132 and 133.
One of the plates has an arm 134, having a slot 135. which receives a pin 136. on

page_text: the standard 71. When the pin is at the end of the slot the fork 127 is centered
relatively to the contacts 77.
The plate having the slotted arm 134 is so much shorter than the other that it can
swing clear of the finger 130 thereon. The longer plate is held by a stop pin 136*
bearing against its edire In this manner the plates are free to swing independently
of each other and will always centre the lever 126 relatively to the contacts 77.
At the lower end of the lever 126 are pivoted two arms 137 extending toward the
needle carriages and supported by wires or cords 138, which (see Fig. 2) pass up to
a bell crank lever 139 and thence by bell cranks 139 and 139° are connected to the
clutch lever 115 which locks the stencil driving pulley with its shaft (Fig. 2).
The arrangement is such that when the clutch is thrown and the stencil is moving
the wires 138 are slackened and the arms 137 are lowered slightly bringing them into
the path of lugs 140 on the foot of the carriage arms 24.
Those lugs as the carriages approach the web strike the ends of the arms 137. and
swing the lever 126 until its fork 127. strikes the switch 72 and throws it off the
contact 77, which instantly cuts the magnet 58 out of circuit and checks the needle
carriage which is in motion, the stoppage taking place a little before the needles touch
the web. The moment the stencil stops the wires 138 are drawn tight and raise the
arms 137 so that the lugs 140 can pass without striking them.
In lieu of the form of contacts and switch shown in figs. 10 and 11. the modified
form shewn in fig. 19 may be employed. 141 indicates the switch composed of a
roller of conducting material connected to the wire 76. which is shewn in Figs. 10 and 11
as being connected to the switch 72. This roller moves over lovers 141" pivoted at 141°
and pressed by a weight 142 against the roller. Each of the outer levers 141" is in
electric connection with a wire of the magnets 58, and the central contact is connected
to one pole of the battery. On the outer levers are insulated parts 143 so arranged
that as the roller 141, moves it is alternately in electric connection with the central
and outer lever, and the central and inner, thus exciting the magnets 58 alternately
and cutting one magnot out of circuit as the other is brought in.
The arms 60 of the tension bars 61. may be loaded by weights 150 adjusted at any
part of the arm by a set screw 151 whereby the tension upon the throads may bo
regulated as desired. Also in order to secure a reversal of the railway at any given
point of thread tension the switch arm 66 is made adjustable, relatively to the position
of the arms 60, by turning the rings 63, and fastening it at any point by the set
scrow 64. In this way the switches may be adjusted to reverse the carriages as soon
as the desired tension is produced, and the two carriages inay be caused to work at the
same or at different tensions.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed 1 declare that what I claim in respect
of an embroidering machine is :-
1. The combination with a moveable tambour frame of a vertical, and a horizontal
screw connected to supports of the frame and pulleys arranged to turn these screws
or their nuts in opposite directions according as they are brought into action by
clutch lovers actuated by electro-magnets as determined by a stencil sheet having
openings of varied length and arrangement corresponding to the degree and character
of the movement to be given the tambour frame.
2. The combination with a moveable tambour frame and mechanism by which
the successive stitch adjustments are effected of gearing actuating said mechanism,
clutches by which said gearing is brought into action and electric circuits by the make
and break of which the clutches are locked and unlocked.
3. The combination with a vertically and laterally adjustable tambour frame of
mechanism for giving the successive stitch adjustments a stencil sheet having as
many sets of longitudinal openings as there aro different adjustments each opening
having a length which determines the degree of the stitch movement, and electro
magnets in circuits which are made and broken by the progressive steucil.
4. The combination with needle carriages which alternatel approach and reco.le
i

page_text: from the wob, of reversing pulleys with clutches actuated by electro magnets
which are excited, as determined by a perforated stencil sheet making and breaking
contacts.
5. In combination with mechanism for reversing the railway of electro magnets by
which the mechanism is brought into action, a switch by which the magnets are
alternately switched into and out of circuit, a guard lever having a fork straddling
the switch, arms hinged to the lover and supported by wires connected with the clutch
lever of the pulley which drives the stencil, and lugs on the needle carriages which
strike these arms when lowered by the engagement of the clutch.
6. The combination with the needle actuating mechanism, of a stencil by which the
movements of the tambour frame are controlled and timed, and stencil feeding
mechanism set in motion by the needle actuating mechanism, and arrested by the action
of the stencil itself.
7. The combination with the needle carriages and mechanism for moving them
toward and from the web, of reversing devices, electro-magnetic apparatus actuating
the same and tension devices resting on and operated by the working threads, by
which the said magnets are switched into circuit.
8. The combination with the mechanism by which the several adjustments of the
tambour frame are effected, of a stencil sheet having openings which control the
degree of adjustment and gearing for driving said stencil at different rates of
speed.
9. The combination with the needle carriages and their needle clamping jaws of
cam levers locking and releasing said jaws a centrally fulcrumed lever engaging with
the cam-lever connections, and a driving block on the railway belt by which the said
lever is actuated and the needles locked in the one carriage, at, or before they are
released by the other.
10. The combination with the needle carriages and their needle clamping-jaws, of
levers centrally fulcrumed and arranged cams locking and releasing the needlo jaws,
and levers oporating the cams and blocks on the railway belts by which the cam levers
are actuated simultaneously in opposite directions by the central lovers.
11. The combination with the needle carriages and the mechanism by which they
are alternately moved toward and from the web, of tension bars resting upon the
working threads, electrical contacts engaged and disengaged by the rise and fall of
those bars electro magnets in the circuits of which these contacts form part, and devices
actuated by these magnets to lock the oppositely revolving pulleys to the power shaft
alternately.
12. The combination with two separato sots of electro-magnets of electrical contacts
in the circuit of one set of these magnets, tension bars engaging and disengaging those
contacts by their rise and fall, a switch having an armature between the magnets of
the first set and connected with one pole of the battery of the second set of magnets,
contacts connected to the other pole with which contact the switch is alternately engaged
by the attraction of its armature, and reversing mechanism which is brought into
action by closing the circuits of the magnets.
13. The combination with the needle carriage and mechanism by which it is moved
to and fro of a tension bar resting on the working threads a rigid electrical contact on
the carriage arm a pivotted spring actuated contact, carried by the parts supporting the
tension bar and a throw off engaging with the rigid contact, and permitting electric
connection upon the rise of the tension bar.
14. The combination with the stencil feeding mechanism, and the clutch lever
bringing the mechanism into action, of an electro-magnet actuating the clutch
lover, and electrical contacts engaged by the retrograde movements of the needle
carriages.
15. The combination with a tension bar resting on the working threads, of an
electrical circuit made by the rise of said bar; an electro magnet in said circuit,
reversing mechanism brought into action by the attraction of such magnet, and a switch
actuated by a toe on the needle carriage to close the circuit of the magnet and arrest
or reverse the carriage to prevent its approach while the web is in adjustment.

page_text: 10. In combination with a tension bar resting on the threads an electrical circuit
made by the rise of the bar, a magnet in the circuit reversing mechanism brought into
action by the magnet and an automatic switch by which the circuit is maintained until
the action of the railway is again reversed.
17. In combination with a tension bar resting on the working threads, an electrical
circuit closed by the rise of the bar, a magnet in the circuit, a pulley mounted between
friction discs on a revolving shaft a belt normally loose ou the pulley, and a lover
actuated by the magnet to bind the belt on the pulley.
18. In combination with the needle carriages and the needle clamping jaws, lovers
carrying the moveable jaw, connecting bars on each carriago having studs engaging
forked ond of a lever fulcrumed at the middle of the machine, a forked bar operating
the lever and a block on the belt actuating the bar, whereby the jaw on the one
carriage is opened as that on the other is closed.
19. In combination with the railway reversing mechanism and the electro-magnetic
devices whereby it is brought into action, a switch consisting of separate parallel
contact levers having alternated insulating surfaces, and a contact roller moving along
the lever.