Improvements in Electric Stop Motions for Warping Machines.
Year: 1893

page_text: Date of Application, 2nd Nov., 1893
Complete Specification Left, 10th July, 1894-Accepted, 11th Aug., 1894
PROVISIONAL SPECIFICATION.
Improvements in Electric Stop Motions for Warping Machines.
We CLAYTON DENN, Machinist, JOHN COCKER, Machinist, and CHARLES
DENN, Machinist, all of Frankford, Philadelphia, in the County of Philadelphia,
and State of Pennsylvania, United States of America, do hereby declare the
nature of this invention to be as follows:-
Our invention relates to improvements in electrical stop motions which are
arranged to close electric circuits by the breaking of a yarn or thread in warping
machines, and which by the closing of said circuits, operate mechanism arranged
to stop the machine, the object being to prevent the manufacture of imperfect
goods which follows the breaking of a yarn unless the machine is stopped and the
break repaired.
Our invention relates more particularly to the sliding guides which are supported
by the yarns and which operate as circuit closers. An example of guides arranged
to operate in this manner is shown in the Letters Patent of the United States
No. 395,851, dated January 8, 1889. In the Patent referred to, the yarn guides
close a circuit when the yarn breaks, so that electrically controlled mechanism
stops the machine, but a serious objection to the arrangement of the guides as
circuit closers in the machine, illustrated in said Patent is, that when the guides
drop to close a circuit they always strike in the same place, and after repeated
contacts the abutting parts oxidize to such an extent that the circuit closers
fail to work after a time and the whole stop mechanism therefore becomes
inoperative.
The object of our invention is to overcome this difficulty and arrange the guides
so that when dropped by the broken yarns they will make a sliding contact with
adjacent terminals, and in this way there is always sufficient surface engaged to
insure the closing of the circuit, and the parts do not oxidize to such an extent as
to interfere with such closing.
The yarn spools are arranged in the usual way between the sections, the spools
being pivoted in a supporting frame and opposite each vertical row of spools is a
rail which is grooved longitudinally to receive the yarn-guides and circuit closers.
Each guide and circuit closer is adapted to slide vertically in the groove, the upper
end portion of said guide and circuit closer being bent outward and downward so
as to project beyond the face of the rail, this bent upper portion terminating in an
eye through which the yarn runs. The lower end of the circuit closer is bent
upward and outward, so as to adapt it to strike a contact pin, as described
below.
In the back of the groove is a contact strip which forms one terminal of an
electric circuit, the strip connecting by a wire which is wound around a magnet
for operating the circuit magnetism with a battery or other source of electricity,
and another wire leads from the battery to a conducting strip on one side of the
rail. Rivets or pins connect with this conducting strip and extend through or
across the groove so as to be in the path of the inclined or bent ends of the guides
or circuit closers when the latter are dropped. The upward movement of the
guides is limited by cross pins extending across the groove, these pins being
arranged in pairs for the purpose of retaining drop wires in the grooves and in
loose contact with the strips, thus forming metal guides for the drop wires.
The warp yarns extend from the spools around the bevelled corner of the

page_text: adjacent rail, thence through the eyes of the guides and circuit closers and across
the face of the rail, the yarns moving across a guide rod which prevents excessive
friction and through screw eyes on the rail, the latter acting as fulcrunis and
causing the yarns to lift the circuit closers and guides; from the guides the yarns
pass to the gatherer in the usual way. When one of the circuit closers and guides
is lifted, the inclined lower end strikes the lower pin, and as the inclined end is
held up against the pin, the guide is held out of contact with the strip, but if the
yarn breaks the guide is dropped and makes a sliding contact with the strip and
with the pin so as to close the circuit through the magnet and the stopping
mechanism is operated, as hereinafter described, so as to stop the machine.
The circuit closed by the dropping of the guide is as follows-
From the battery through the wire and magnet, the contact strip, the circuit
closer and guide, the pin, the conducting strip and the wire, back to the battery.
In a modified form of circuit closing guide and terminals, the rail is provided on
its face with a longitudinal groove in the back of which is laid a conducting strip
adapted to connect with the wire as above described, and secured to the conducting
strip is a plate having thereon a lug in which is pivoted an outwardly extending
swinging guide which is bent to make it assume the right elevation, and has its
free end bent into a vertical position and terminating in a thread eye.
The guide is provided with a depending bent toe which hangs below the lug and
is adapted to swing inward between the curved and oppositely arranged terminals
above mentioned so as to close the circuit. The one terminal is secured to the
plate and the other terminal to a conducting strip on one side of the rail and which
is adapted to connect with the wire of the battery. The guides are arranged in
relation to the spools and the gatherer, so that the tension of the yarns will hold
the outer ends of the guides in an elevated position, and when a yarn breaks, the
guide with which it is connected drops and the toe swings inward between the
curved terminals, thus closing the circuit.
The mechanism for stopping the machine controlled by the magnet may consist
of the following arrangement.
Adjacent to the driving shaft of the warping machine a shipper bar is mounted
to slide in a suitable support in a direction parallel with said shaft, said bar having
arms extending upward over the pulleys and adapted to engage with the belt which
drives said pulleys. The bar has a collar upon it and is pressed by a spring of
sufficient force to move the shipper bar and shift the belt. The bar is held against
the pressure of the spring by means of a stud on the bar and a lever whose upper
end is held between the stud and the support of the shipper har. The lever which
extends normally in a vertical position is fulcrumed at the centre, and to its lower
end is pivoted a laterally extending lever, projecting beneath the driving shaft,
and provided with an angular armature which extends horizontally above the core
of the magnet. The inclination of the lever is regulated by a screw which bears
against the back of the armature. The weight of the lever is sufficient to hold the
armature in an elevated position when the magnet is not energized. In a parallel
position with the vertical pivoted lever above mentioned is a vibrating lever which
is fulcrumed on the support of the shipper bar the lower end of which lever is
arranged to normally swing above the free end of the armature lever. The upper
end of the vibrating lever terminates in a rounded head which rides on an eccentric
on the driving shaft, the head being held in engagement with said eccentric by a
spring which is secured to the upper portion of the vibrating lever and to the
support. When the machine is running the lever will vibrate freely, but when
one of the yarns breaks, a guide and circuit closer is dropped, as above described,
the circuit through the magnet is closed and the armature is pulled down so as to
swing the lever upward and into the path of the vibrating lever, the lower end of
which strikes the free end of the armature lever, thus pushing the latter
longitudinally towards the magnet and swinging the vertical lever so as to move
its upper end out of the path of the stud, the spring then acting on the shipper

page_text: bar so as to cause the arms acting on the belt to shift the belt onto the loose
pulley and stop the machine.
Dated Namba and 1902.
COMPLETE SPECIFICATION.
Improvements in Electric Stop Motions for Warping Machines.
We, CLAYTON DENN, Machinist, JOHN COCKER, Machinist, and CHARLES
DENN, Machinist, all of Frankford, Philadelphia, in the County of Philadelphia,
and State of Pennsylvania, United States of America, 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 :-
Our invention relates to improvements in electrical stop motions which are
arranged to close electric circuits by the breaking of a yarn or thread in warping
machines, and which, by the closing of said circuits, operate mechanism arranged
to stop the machine, the object being to prevent the manufacture of imperfect
goods, which follows the breaking of a yarn unless the machine is stopped and the
break repaired.
Our invention relates more particularly to the sliding guides which are supported
by the yarns and which operate as circuit closers. An example of guides arranged
to operate in this manner is shown in the Letters Patent of the United States,
No. 395,851, dated January 8, 1889. In the Patent referred to, the yarn guides
close a circuit when the yarn' breaks, so that electrically controlled mechanism
stops the machine, but a serious objection to the arrangement of the guides as
circuit closers in the machine illustrated in said Patent is, that when the guides
drop to close a circuit they always strike in the same place, and after repeated
contacts the abutting parts oxidize to such an extent that the circuit closers fail
to work after a time and the whole stop mechanism therefore becomes inoperative.
The object of our invention is to overcome this difficulty and arrange the guides
so that when dropped by the broken yarns they will make a sliding contact with
adjacent terminals, and in this way there is always sufficient surface engaged to
insure the closing of the circuit, and the parts do not oxidize to such an extent as
to interfere with such closing.
To this end our invention consists in certain features of construction and com-
binations of parts, as will be hereinafter described and claimed.
Reference is to be had to the accompanying drawings forming a part of this
Specification, in which similar figures of reference indicate corresponding parts in
all the views.
Figure 1 is a broken sectional elevation showing the general arrangement of the
circuit closers and the stop mechanism;
Figure 2 is an enlarged detail sectional view on the line 2-2 in Figure 3,
showing one of the guide walls and the arrangement of the circuit closing guides
therein;
Figure 3 is a sectional plan on the line 3-3 in Figure 2;
Figure 4 is a broken perspective view of a modified form of yarn guide and'
circuit closer; and
Figure 5 is a broken plan of a portion of the stop mechanism.
The yarn spools 10 are arranged in the usual way between the sections, the
spools being pivoted in a supporting frame 11 and opposite each vertical row of

page_text: spools is a rail 12 which is grooved longitudinally, as shown at 13, to receive the
yarn guides and circuit closers 14. Each guide and circuit closer is made
preferably of wire and is adapted to slide vertically in the groove 13, the upper
end portion of the guide and circuit closer being bent outward and downward, as
shown at 15, so as to project beyond the face of the rail 12, and this bent upper
end 15 terminates in an eye 16 through which the yarn runs. The lower end of
the circuit closer is bent upward and outward, as shown at 17 in Figure 2, this
bent or inclined portion being adapted to strike a contact pin, as described
below.
In the back of the groove 13 is a contact strip 18 which forms one terminal of
an electric circuit, the strip connecting by a wire a which is wound around the
magnet 19 for operating the circuit magnetism with the battery A or other source
of electricity, and another wire a' leads from the battery to a conducting strip 20
on one side of the rail 12. Rivets or pins 21 connect with this conducting strip 20
and extend through or across the groove 13 so as to be in the path of the inclined
or bent ends 17 of the guides or circuit closers 14 when the latter are dropped.
The upward movement of the guides is limited by cross pins 22 extending across
the groove, as shown clearly in Figure 2, these pins being arranged in pairs for the
purpose of retaining drop wires in the grooves and in loose contact with strips 18,
thus forming metal guides for the drop wires.
The warp yarns 23 extend from the spools 10 around the bevelled corner 24 of
the adjacent rail 12, thence through the eyes 16 of the guides and circuit closers
and across the face of the rail, the yarns moving across a guide rod 25 which
prevents excessive friction and through screw eyes 26 on the rail, the latter acting
as fulcrums and causing the yarns to lift the circuit closers and guides; from the
guides the yarns pass to the gatherer 27 in the usual way. When one of the circuit
closers and guides 14 is lifted, the inclined lower end 17 strikes the lower pin 22,
and as the inclined end is held up against the pin, the guide 14 is held out of
contact with the strip 18, but if the yarn breaks the guide is dropped and makes a
sliding contact with the strip 18 and with the pin 21, so as to close the circuit
through the magnet 19 and the stopping mechanism is operated as hereinafter
described, so as to stop the machine.
The circuit closed by the dropping of the guide is as follows,-
From the battery A, through the wire a and magnet 19, the contact strip 18, the
circuit closer and guide 14, the pin 21, the conducting strip 20 and the wire a',
back to the battery. A modified form of circuit closing guide and terminals is
shown in Figure 4, where the rail 12 is provided on its face with a longitudinal
groove 28 in the back of which is laid a conducting strip 29 adapted to connect
with the wire a as above described, and secured to the conducting strip 29 is a
plate 30 having thereon a lug 31 in which is pivoted an outwardly extending
swinging guide 32 which is bent to make it assume the right elevation, and its free
end is bent into a substantially vertical position, as shown at 33, and terminates in
a thread eye 34.
The guide 32 is provided with a depending bent toe 35 which hangs below the
lug 31 and which is adapted to swing inward between the curved and oppositely
arranged terminals 36 and 37 so as to close the circuit. The terminal 36 is secured
to the plate 30 and the terminal 37 is secured to a conducting strip 38 which is
fastened on one side of the rail 12 and which is adapted to connect with the wire a¹
of the battery. The guides 32 are arranged in relation to the spools and the
gatherer 27, so that the tension of the yarns 23 will hold the outer ends of the
guides in an elevated position, and when a yarn breaks, the guide with which it is
connected drops and the toe 35 swings inward between the curved terminals 36
and 37, thus closing the circuit.
The machine is driven by a shaft 39 having tight and loose pulleys 40 and 41,
but the connection between the shaft and machine is not shown, as it may be of
any kind, and the mechanism for stopping the shaft is illustrated merely to show an
operative device, but such mechanism is not claimed as a part of this invention.

page_text: In a support 42, adjacent to the shaft 39, is a shipper bar 43 which is held to
slide in a direction parallel with the shaft 39 and this bar has arms 44 extending
upward over the pulleys and adapted to engage the belt which drives the pulleys.
The bar 43 has a collar 45 upon it and it is pressed by a spring 46 which is strong
enough to move the shipper bar and shift the belt. The bar is held against the
pressure of its spring by means of a stud 47 on the bar 43, and a lever 48,.
the upper end of which is held between the stud and the adjacent support 42. The
lever 48 extends normally in a vertical position and is fulcrumed in the center, as
shown at 49. To its lower end is pivoted, as shown at 50, a laterally extending
lever 51, the lever extending beneath the shaft 39 and on one end of the lever is
formed an angular armature 52 which extends horizontally above the core of the
magnet 19.
The inclination of the lever 51 is regulated by a screw 53 which projects through
the lever 48 and against the back of the armature 52. The weight of the lever 51
is sufficient to hold the armature 52 in an elevated position when the magnet 19 is
not energized. Extending in a position substantially parallel with the lever 48 is a
vibrating lever 54 which is fulcrumed on the support 42, as shown at 55, and the
lower end of this lever is arranged so as to normally swing above the free end of
the lever 51. The upper end of the lever 54 terminates in a rounded head 56.
which rides on an eccentric 57 on the shaft 39, the head being held in engagement
with the eccentric by a spring 54 which is secured to the upper portion of the
lever 54 and to the support 42. It will be seen then that when the machine is running
and the warp is all right, the lever 54 will vibrate freely, but when one of the
yarns 23 breaks, a guide and circuit closer is dropped, as above described, the
circuit through the magnet 19 is closed and the armature 52 is pulled down so as
to swing the lever 51 upward and into the path of the lever 54, the lower end of
which strikes the free end of the lever 51, thus pushing the latter longitudinally
towards the magnet 19 and swinging the lever 48 so as to move its upper end out
of the path of the stud 47, and the spring 46 then pushes the shipper bar 43 so
that the arms 44, acting on the belt, shift the latter upon the loose pulley 41 and
stop the machine instantly.
The stopping mechanism controlled by the magnet 19 forms no part of this
invention, and it will be understood that the guides and circuit closers described
may be used for operating any other suitable mechanism adapted to stop the
warping machine.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that we
claim is,
1. The herein-described stop motion for warping machines, comprising electrically
controlled stopping mechanism, and yarn guides dropped by the breaking of a warp
yarn and adapted to make a sliding contact with terminals arranged in the circuit
of the controlling mechanism so as to close the circuit through the same,
substantially as described.
2. The combination with the yarn spools, of the vertically grooved rail arranged
adjacent to the spools electrically controlled stopping mechanism for stopping the
machine, a contact strip arranged in the groove of the rail and forming one
terminal of the circuit as well as a metal guide for circuit closers which include
the stopping mechanism, pins extending across the grooves and forming the other
terminals of said circuit, and sliding guides supported by yarns, arranged in the
groove, the guides being adapted when dropped to make a sliding contact with the
contact strip and with the terminal pins, substantially as described.
3. In an electric stop motion for warping machines, the combination, of the
grooved rail having a contact strip in the back of the groove adapted to form one
terminal of an electric circuit, the transverse pins extending through the grooves
and forming the other terminal of the circuit, and the sliding yarn guides and
circuit closers held to slide in the groove, each guide having an inclined lower end

page_text: to contact with the terminal pins and an outwardly extending upper end terminating
in a yarn eye, substantially as described.
4. In an electric stop motion for warping machines, the combination of the
vertically grooved rail having a contact strip in its back forming one terminal of
an electric circuit, the transverse pins extending across the groove and forming the
other terminal of the circuit, the sliding guide and circuit closer held to slide in the
groove, the guide having an upwardly bent lower end and an outwardly bent upper
end terminating in an eye, and a second set of pins extending across the groove and
adapted to hold the circuit closer in loose contact with metal strips in the bottom
of the groove, substantially as described.
5. In an electric stop motion for warping machines, the combination of the
vertically grooved rail, the contact strip in the back of the rail forming one
terminal of an electric circuit, the contact pins extending across the groove forming
the other terminal of the circuit, the sliding guide and a circuit closer held to move
in the groove and engage a terminal, the guide having an outwardly extending
upper end which terminates in an eye, the guide rod arranged parallel with the
groove, and the guide eyes extending outward from the rail, substantially as
described.
Dated this on day of July 1994.
C. DENN,
J. COCKER,
CHAS. DENN,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.