Improvements in Machines for Making Doubled or Folded and Twisted Bands or Cords employed for Driving the Spindles of Spinning and Twisting Machines, and the like.
Year: 1897

page_text: Date of Application, 18th June, 1897-Accepted, 18th Sept., 1897
COMPLETE SPECIFICATION.
Improvements in Machines for Making Doubled or Folded and
Twisted Bands or Cords employed for Driving the Spindles of
Spinning and Twisting Machines, and the like.
I, HENRY STUDLY COLE, residing at No. 320 Lonsdale Avenue, in the City of
Pawtucket, County of Providence, and State of Rhode Island, U.S.A., Manufac-
turing Machinist, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
by the following statement and accompanying drawings:-
My invention relates to improvements in Loop-banding Machines, so called,
and it consists in the novel construction and arrangement of certain devices
thereof, as hereinafter set forth and claimed. The improvements referred to
being more particularly applicable to the automatic type of loop-banding
machines.
In devising my improvements the object I have had in view is to simplify the con-
struction of loop-banding machines, thereby not only increasing their efficiency
and volume of product or output but at the same time cheapening the cost of
manufacture and maintenance. In my improved machine the twisting of the
yarn and the doubling or "laying up" of the same is effected wholly at the head
end of the machine and through the medium of mechanism actuating a single
twisting arbor or spindle.
It might be stated that in various kinds of machines employed in the produc-
tion of yarn for textile fabrics, as for example spinning and twisting machines,
as well as mules, the series of cop or bobbin-carrying spindles thereof are rapidly
rotated by means of individual bands passing around the driving-drum and the
spindle-whorls, in a manner analogous to a quarter-turn belt. The short small
bands or straps employed for thus driving the spindles are termed "spinning-
bands or loop-bands." The band is formed from a comparatively short length
of suitable cord or yarn; the latter is then twisted and afterwards doubled and
twisted, thus forming a loop at one end of the band into which loop the other end
is tied or secured after the band has been passed snugly around the drum and
whorl, thereby making the band endless.
"
In the accompanying five sheets of drawings, Fig. 1 is a front side elevation,
in reduced scale, of a loop-banding machine embodying my improvements, and
showing the relation of the parts at the instant the carriage has been propelled
rearwardly and locked in position immediately preceding the rotation of the
twisting jaws to twist the length of yarn held by them and the carriage; the
front side or board of the bed being omitted so as to more clearly show
the mechanism. Fig. 2 is a corresponding side view of the head portion of the
machine, in enlarged scale. Fig. 3 is a plan view. Fig. 4 is a partial side view
of the bed and rear portion, also in enlarged scale. Fig. 3 is a plan view.
Fig. 4 is a partial side view of the bed and rear portion, also in enlarged scale,
and forming practically a continuation of Fig. 2. Fig. 5 is a side view of the
carriage, detached, its front or apron being omitted. Fig. 6 is an end view of

page_text: the removing fingers, &c., and the supporting brackets therefor. Fig. 7 is a
transverse section, taken on line 7-7 of Tig. 2. Fig. 8 is a cross-section of the
twisting spindle, taken on line 88 of Fig. 2. Fig. 9 is a transverse section,
taken on line 99 of Fig. 2. Fig. 10 is a plan view, in partial section, of the
twisting head, jaws and spindle, showing the twisting-jaws projecting through
the holders, and the yarn-carrier extending transversely through the jaws. Fig. 11
is a similar view, showing the jaws retracted into the holder. Fig. 12 is a side
view of the improved adjusting cams, enlarged. Fig. 13 is an end view of the
same. Fig. 14 is a cross-section on line 14 14 of Fig. 12, and Fig. 15 is a
longitudinal section, taken on line 15 15 of Fig. 13.
I would state briefly that the various functions and operations of the machine
are performed automatically. That is to say, the free end of the yarn is first
fed through the twisting-jaws to the nippers or holding-jaws; the carriage then
recedes to its limit thereby drawing off the proper length of yarn from the spool;
the yarn is next severed from the spool, the two twisting-jaws at the same time
commencing to revolve on their axes to twist the yarn; before the twisting
operation has been completed the twisting head is revolved, thereby laying up
or doubling the yarn, when now the removing fingers seize the thus completed
band between them and detach it from the carriage and twisting-jaws, the latter
meanwhile opening for the purpose.
In the following description, A, again referring to the drawings, indicates an
automatic loop-banding machine complete, embodying my improvements. It is
supported on front and rear end legs L L, which in turn are connected by the
fixed frame or bed b. At the front end of the machine is located the several
driving or actuating mechanisms, the same being mounted on the base E; the
latter being united to the rear leg by means of the two fixed horizontal parallel
guide-rods a a.
.
The motive power or force for effecting the movements of all the various
devices (except the twisting means) is transmitted through the continuously.
traveling belt 28 and its pulley 77, the latter being secured to a short shaft f
revolving in bearings formed in the yoke f' secured to the stand G. See Figs. 2
and 3. To the inner or rear end of said shaft is secured a worm f meshing
into a wheel f³, the latter being fixed to a suitably mounted horizontal shaft bi
arranged transversely of the machine. To the front end of this shaft is secured
a worm w adapted to drive the longitudinally extending cam-shaft d through
the medium of the worm-wheel (shown by dotted lines); the latter being
secured to the shaft d and located below the worm.
The carriage B is adapted to be propelled in either direction by the con-
tinuously traveling chain c. This chain passes over suitable wheels c¹, 2, mounted
at the front and rear ends of the machine. The front wheel is fixed to a
suitably supported cross shaft which also carries a chain-wheel f; the latter
in turn being driven by an endless chain f³ passing upwardly through the base E
and over a sprocket-wheel f4, secured to said driven worm, shaft b. Thus it will
be seen that the cam-shaft d and carrier-chain shaft revolve in unison with
the said driving or primary shaft f, but at different rates of speed.
In my improved banding machine I employ two sets of laterally separated self-
closing twisting jaws. In the present device the jaws are mounted to revolve
in a head a capable of rotating in a capped bearing i formed in the upper portion
of the stand I. Each jaw consists of the toothed sleeve r and the endwise
movable spring-resisted holders; the rear end of the latter is enlarged and
flattened and has a hole therethrough adapted to freely receive the yarn-tube or
trumpet o. See Fig. 10. The end of the sleeve r is slotted and carries the said
flattened portion of the holder; the opposite end of the latter being sorew-
threaded and provided with adjusting nuts 3.
:
The twisting shaft or spindle e extends longitudinally of the head portion
of the machine, its outer or front end being mounted in the bearing formed in
the top of said stand G. At the rear of the latter fast and loose pulleys P, p¹,

page_text: are mounted on the spindle; from this point the spindle extends rearwardly
through the centre of a loose sleeve or hollow shaft a and carries at its rear end
a centre gear el meshing into the said toothed portions e2 of the jaw-sleeves r.
Thus it will be evident that the rotation of the spindle e produces a corresponding
movement to each of the twisting-jaws. The said hollow shaft is also provided
with fast and loose pulleys, h³, 1, motion being imparted to the shaft by means
of the continuously traveling belt when shipped on to the fast pulley h³.
Obviously when this shaft revolves the gears e carried by it travel around the
then revolving center gear e¹, thereby causing the strands of twisted yarn held
in the jaws to be doubled or "laid up.'
The combined holding and twisting jaws are opened and closed automatically,
as follows: To the shaft d is secured a suitable cam 8, this latter actuates the
lever through the medium of the truck roll mounted on a link jointed to the
lever; the portion cabote the fulcrum is forked and adapted to bear against
the forward ends of the holders s of the jaws. Thus it is clear that the rotation
of the cam forces both holders rearwardly (against the tension of the inclosed
springs) until they project beyond the rear ends of the sleeves r sufficiently to
receive the trumpet o, thus opening the jaws. After the trumpet has inserted
the yarn into the nipper-jaws the cam permits the springs to retract the holders
into the sleeves or annular spindles r, thus again closing the jaws..
The means for shipping the belts and at fixed intervals from the loose
pulleys and h onto the pulleys and, secured to spindles e and respec-
tively, for the purpose of revolving the spindles so as to twist and lay up the
yarn held between the jaws is substantially as follows: The two corresponding
shipper-levers 72, 2 are practically alike, and are fulcrumed to a bracket F, see
Fig. 9, &c. Each lever is provided with a horizontal arm having its, free end
in yielding engagement with a cam 7, constructed and arranged to actuate the
shippers at the proper time. Each of the said pulleys, 7, h³, is provided on its
rear end or face with oppositely arranged notches q; adapted to receive the upper
or hooked end of a bell-crank lever or latch 23, also pivoted to said bracket F.
The other arm of the lever extends rearwardly and bears upon the double cam 3
secured to said shaft d. A spring serves to ensure the engagement of the latch
with the notch of the pulley, the action of said cam being to force the latch from
the pulley.
In Figs. 12 to 14 I have represented the shipper and latch cams in detail.
In order to render these cams adjustable I make them in three independent
sections, viz., 1, 2, 3; the same being bored out and secured to a sleeve 4 mounted
on the cam-shaft d, as clearly shown. The middle section 2 virtually comprises
both the shipper-cam p and latch-cam and is rigidly fixed to the cam-shaft d.
I find it desirable at times to change the relation of the cams to each other, within
fixed limits, as for instance, so as to give more or less time to the twisting of the
yarn, as in doubling or laying it up; this is effected by first loosening the screw
in the cam section 1 and turning the latter axially the desired distance and then
resecuring it to the shaft. The cam sections 1 and 3 have a fixed relation to each
other, since they are both firmly secured to the bushing and to the shaft d. In
order that these said axial adjustments may be readily effected the bushing 4 is
cut away or slotted on opposite sides, at 5, contiguous to the securing pin 6, as
shown in Fig. 14. I would add that substantially the same cam device is em-
ployed for each of the two sets of said belt-shippers and latches, see also
Fig. 3.
The varn feeding device is as follows: the end of the yarn a first passcs through
the horizontal trumpet or hollow guide o and unwinds from a suitably located
spool, or even from a bobbin or reel. The trumpet is fixed to the feeder
carriage m2 and is adapted to travel back and forth on the bracket K. See
Figs. 7 and 3. To the said carriage m² is pivoted a jaw member m, its lower
portion, between the supporting ears, being toothed or adapted to engage the
yarn the arrangement being such as to allow the yarn to be drawn off freely

page_text: through the carriage m³ and trumpet o toward the twister, although preventing
the yarn from slipping rearwardly past the jaw toward the spool u. The lightly
weighted portion of the jaw maintains the latter in continuous engagement
(yieldingly) with the yarn. The arrangement of the trumpet is such that when
the twisting jaws or holders s are projected it passes through them and introduces
the yarn to the jaws of the then open nippers t. The means for reciprocating the
trumpet rearwardly consist of the suitably shaped and properly timed cam o³
secured to the continuously revolving shaft d, and the guided rod 03 in engage-
ment with said cam and jointed to the operating lever m¹ fulcrumed to the
stand m.
The forward movement of the lever is controlled by an adjustable 1
stop m', shown by dotted lines in Fig. 7. By this arrangement the trumpet is
forced rearwardly to its normal position where it remains until at the proper
time the cam 02 permits it to again advance. For the latter movement a weighted
connection m attached to the lever is employed. '
After the trumpet has been retracted to the said normal position the cutter
or knife n is swung across the end of the guide plate by means of the suitably
shaped cam o secured to the rear end of the shaft d; the action of the cutter
severs the yarn just before the holders s are set in motion.
The nipping-jaws t above referred to are jointed to a bracket secured to the
front side of the stand I; these jaws receive the free end of the yarn from the
trumpet and hold it immovably while the length of yarn to form the loop-band
is being unwound from the spool. The upper member t¹ of the nipper is bent
and terminates in an eye through which a vertical link freely passes. This
link is screw-threaded and provided with nuts or collars both above and below
the eye, see Fig. 2 and 3. The jaws are closed by means of a suitable cam y 2
fixed to the revolving shaft d acting through a pivoted connection or lever 55
fulcrumed to the stand I; the function of the cam being to lift the said lever.
The weight of the member t¹ &c., is utilized to automatically open the jaws
immediately following the disengagement of the cam from the lever.
The traveling carriage. B is employed for drawing off the length of yarn to a
produce the loop-band. While the carriage is at a state of rest at the rear of
the machine the yarn held by the loop-pins a8 of the loop-holder a² is twisted
and doubled, after which the slowly revolving removing jaws or fingers, soon to
be described, detach the finished band from the holder.
By
The mechanism for propelling the carriage B consists of an endless continuously 3
traveling chain c running over the front and rear sprocket wheels, c¹, c³, and
driven by the chain f³, primary shaft f &c., before described. The carriage is
supported on the pair of fixed longitudinally extending guide-rods a, and is
adapted to be intermittingly secured to and disconnected from the chain c.
referring to Fig. 5 it will be seen that the carriage is provided with upper and 4
lower freely turning sprocket wheels g¹, in continuous engagement with the
links of the chains. Each wheel member has a series of ratchet-teeth and
self closing pawls g² pivoted to the front of carriage apron adapted to engage said
teeth r². When the upper wheel g¹ is held from revolving through the medium
of the corresponding pawl, the carriage will be propelled rearwardly, and by 4
locking the lower wheel to the chain the carriage will be propelled in a reverse
direction, or towards the head or front end of the machine.
The following describes means whereby the carriage is detachably-secured to
the chain c. It will be seen that each pawl lever is provided with a notched
latch h³, pivoted to the apron. A spring serves to swing the pawl g2 into 5
engagement with the ratchet whenever the latch is tripped or lifted from the
pawl, thereby locking the carriage to the chain, as before stated.
Fig. 5 shows the carriage advanced to its limit, the forward pawl being released
from the lower ratchet by striking the end of the adjustable stationary stop o³,
thereby at the same time forcing the upper end of the pawl rearwardly into the
notch of the corresponding latch h², thus locking the pawl until the latch itself
is tripped. While the carriage, &c., are in the position shown in Fig. 5, the

page_text: yarn is introduced past the rear of the loop-pins a into the nipper-jaws, the
carriage meanwhile being held stationary by the hook-lever k¹ (not shown in this
Figure but represented in Figs. 1 and 4). After the trumpet returns to its
normal position the action of the suitably timed revolving cam d² secured to
front end of shaft d and operating through suitable connections and the depending
lever do (Fig. 2) quickly forces the horizontal rod g endwise in a rearward direc-
tion, thereby at the same time swinging the end of the hook-lever
from the carriage; said movement being effected by means of the engagement
of the dog 5, secured to the rod g, with the spring-resisted lever k.
upwardly
The continued movement of the rod trips the latch h² from the upper pawl,
the spring 3 then instantly swinging the pawl into the teeth of the corresponding
ratchet thus locking the carriage to the upper side of the chain, the latter then
propelling it to the rear end of the machine. Fig. 5 shows the carriage, &c.,
at the instant it is thus locked to the chain, preparatory to said rearward
movement.
The means for tripping the rear latch just referred to is as follows: In Fig. 4
is shown a swinging lever coupled to an arm adjustably secured to the rod g.
The upper portion of lever is provided with a flat table so arranged that
when the lever is swung upwardly by the rearward movement of rod g it engages
a laterally projecting pin secured to the rear latch, thereby forcing the latch
upwardly from the pawl, the spring then swinging the pawl into the upper
ratchet, as before stated.
The carriage in traveling rearwardly causes the rear pawl g³ to engage the rear
stop o adjustably secured to the depending arm 78 of the cross-head slidably
mounted on the guide-rods a. A hook-latch 2 fulcrumed to the carriage slides
over a lug of the cross-head, thereby locking the latter to the carriage, see
Fig. 4. The said cross-head enters a cushioned socket member n3 adjustably
secured to the rods a. To the cross-head is attached a cord or flexible connec-
tion 5, the same passing over a guide pulley o and having a weight of suspended
therefrom, shown by dotted lines in Fig. 4. This device operates to return the
cross-head to its normal position after being released from the carriage; it being
borne in mind that in doubling or laying up the loop-band the latter becomes
shortened, thus drawing the carriage ahead a corresponding distance.
The means for removing the finished bands from the machine consist of the
two sets of removing-fingers or jaws e³ secured to the continuously revolving
shaft d. The latter is driven through the medium of a sprocket-wheel c³ fixed
to shaft d, a similar wheel c secured to shaft and an endless chain 4 connecting
the wheels, see Figs. 2 and 3. The shaft d' is mounted in adjustable brackets J ;
each of the latter has a cam-shaped flange et on the periphery of which the inner
end of the radially movable jaw-members e bears. See Fig. 6. The outer ends
of the two members are extended to form jaws adapted to receive the band
between them. At the proper time the jaws close snugly upon the band by
means of the springs 6. Fig. 6 also shows in dotted lines the corresponding
relation of the parts; both sets of jaws or fingers being actuated simultaneously.
The revolving jaws carry the band over to the rear side of the machine where
it is discharged into suitable receivers. The jaws open when the members e
ride on to the said cams e.
While the band is still held in the removing-fingers the carriage B is detached
from the cross-head followed by locking the carriage to the lower side of chain c,
the latter then propelling it ahead to the position shown in Fig. 5. The
mechanism for effecting the said action is through the cam-actuated rod g, which
in moving towards the front end lifts the horizontal tripping-bar by means
of the connection uniting the rod and said bar. The upward movement of the
bar causes it to engage and lift the swinging lever 13 mounted in the carriage
and secured to the hook-latch 13, thereby forcing the latter from the lug 16 and
freeing the cross-head. The bar also engages a pin 3 of the forward latch-
lever and releases the latter from the forward pawl; the thus freed pawl then

page_text: by means of its spring swings into engagement with the teeth of the lower
ratchet, thus for the time stopping the rotation of the wheel and locking it
to the chain and causing the carriage to travel ahead until the pawl is released
by contact with the forward stop-pin 08, at which instant the latch again engages
the pawl, thus holding the latter and freeing the carriage from the chain.
It will be seen (Figs. 4 and 5) that the standard or bracket a is secured. to
the center of the carriage B, on the upper end of which is mounted the horizontally
swinging loop-holder 2; the same being located on the forward side of the
bracket, a flat spring a maintaining it in the normal position. To the holder
is pivoted a pair of T-shaped levers a³, each carrying at its front end a loop-pin a³
passing freely through a flange formed on the holder. Springs a connected 'to
the rear arms of the levers serve to keep the pins in position, as shown. The
central or depending member of each lever is arranged in the path of the
weighted tilting dogs 2 adjustably secured to the frame of the machine. While
the carriage is advancing toward the front end these members a successively
engage the dogs, thereby withdrawing the pins from the loop end of the band
after the latter has been seized between the jaws of the removing-fingers e³.
The springs a, however, immediately swing the pins again into, position.TI
may add that when the carriage is being propelled in the opposite direction the
levers are not tripped upon engaging the dogs, the latter in that case swing
rearwardly and return to the normal position after the levers have passed them.
In order to provide a convenient stopping device for the machine I employ a
suitably mounted swinging handle (Figs. 2 and 3) secured to a short crank
or lever n from which latter extends a flexible connection or chain ne adapted
to be attached to the shipper of the usual counter-shaft pulleys; the latter not
being represented.
In the following description of the action of the machine I would preface it
with the statement that while the various steps have been described separately
and in the order of their operation, it is to be understood that practically during
certain stages of the process two or more of the several devices, through which
the steps or functions are effected, are working simultaneously.
Assuming now that the several parts of my improved loop-banding machine
have been suitably arranged and adjusted the operation of the mechanisms in
automatically producing a loop-band is substantially as follows:
While the twisting-jaws (for the instant being non-revolving) are being ad-
vanced or projected beyond the toothed sleeves the carriage B is released and
through the medium of the continuously traveling chain e, it is propelled from
the opposite end of the machine and stops, the hook locking it in place, thus
placing the loop-holding pins 48 in position between the twisting-jaws and im-
mediately to the rear of the head a in which the jaws are mounted. The yarn-
carrying trumpet o then advances transversely through the twisting-jaws and
feeds the free end of the yarn into the open jaws of the nipper t, the yarn
thereby being placed across and at the rear of the said loop-pins; the nipper
jaws nen close onto the yarn, after which the trumpet recedes to its normal
position. The carriage is now locked to the said continuously traveling chain
and by it propelled rearwardly the desired distance, thus drawing off from the
spool or bobbin u the length of yarn (corresponding to the length of band to be
produced), at which instant the carriage is detached from the chain and is hooked
to the weighted slidable cross-head 2; while this is taking place the twisting-
jaws are retracted into the sleeves r, thus securing the yarn in place and preventing
it from slipping. The length of yarn is next severed from the spool at the point
where the yarn passes through the front end of the trumpet by means of the
swinging knife or cutter n. The two twisting jaws are next revolved rapidly
on their axes in the then stationary head a to twist the two strands of
yarn held
between them, the nipper jaws meanwhile opening, during this operation the
head itself is rapidly rotated, thereby causing the head and jaws to revolve in
unison, thus simultaneously twisting together or "laying up" the two strands

page_text: of previously twisted yarn and completing the band. The two pairs of normally
open slowly revolving removing fingers now close down onto the thus formed
band, the twisting jaws mcanwhile being again advanced thus opening them and
freeing the ends of the band held between them. At the same time too the
carriage is released from the cross-head and locked to the traveling chain c, the
action of the latter being to propel the carriage ahead to the twisting head, as
before stated, preparatory to making the next loop-band. During the forward
movement of the carriage the two spring-resisted loop-pins as are successively
withdrawn from the loop by contact with the fixed dogs b. I would add that
the twisting jaws are not opened nor the loop-pins retracted until the said
removing fingers have firmly seized upon the band. These fingers open at the
proper time and deliver the bands into a suitable holder or receptacle located at
the rear side of machine, thus completing the operation.
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:-
1. In an automatic loop-banding machine, combined twisting and doubling
jaws mounted in a revoluble head, and independently driven shafts arranged
one within the other and connected with said head and jaws, whereby the jaws
are.first revolved as in twisting the two strands of the yarn, the head meanwhile
remaining stationary, and then revolving the head in unison with the jaws to
twist or double the two strands together, substantially as described.
2. In an automatic loop-banding machine, the combination with the suitably
mounted driven annular shaft having a head member secured thereto, and two
laterally separated sets of twisting jaws provided with teeth e³ and mounted
in said head, of the suitably driven centre shaft e extending longitudinally through
said annular shaft provided with a gear el at its rear end and intergearing with
said twisting jaws, substantially as described and for the purpose set forth.
3. In an antomatic loop-banding machine, the combination with a belt driven
hollow shaft a and a head member secured thereto, of two sets of self-closing
twisting jaws revolubly mounted in said head, means substantially as described.
for opening the jaws, a belt-driven shaft e extending longitudinally through the
center of said shaft and intermeshing gears secured to the shaft e and to the
twisting jaws, substantially as described and for the purpose set forth.
4. In an automatic loop-banding machine, the combination with the inde-
pendently driven concentric shafts, a, e, one mounted to revolve within the
other, and the two sets of self-closing twisting jaws connected with and rotatable
through the medium of said shafts, of means for intermittingly opening the jaws,
a reciprocating trumpet o for introducing the yarn transversely into said jaws,
and an intermittently reciprocating loop-carriage adapted to draw off a length of
yarn and hold the same while it is being converted into a loop-band, substantially
as hereinbefore described.
5. In an automatic loop-banding machine, the combination with the loop-
carriage, and means substantially as described for intermittingly propelling it
back and forth, of the spring-resisted horizontally movable loop-holder a² attached
to the carriage, and one or more independently movable loop-pins Lounted in said
holder, substantially as described and for the purpose set forth.
6. In an automatic loop-banding machine, provided with a loop-carriage, the
combination with the loop-holder a² attached to and traveling in unison with the
loop-carriage, of a swinging loop-pin arm or lever, and a dog 2 adjustably secured
to the bed or frame of the machine, and arranged in the path of said lever, whereby
upon advancing the carriage the lever engages said dog and retracts the loop-pin,
substantially as described and for the purpose set forth.
7: In an automatic loop-banding machine,. the combination with an endless
chain continuously traveling in one direction, a loop-carriage and means for
detachably securing the carriage to the chain, of the cam actuated tripping rod g

page_text: extending longitudinally of the machine and carrying a dog 2, and a self-closing
pivoted hook-lever adapted to engage the carriage when it arrives at the
end of its forward stroke and hold it stationary, and further arranged whereby
the rearward movement of said rod causes its dog. to engage the hook-lever and
detach it from the carriage, preparatory to propelling the latter rearwardly.
8. In an automatic loop-banding machine, the combination with the cam-
actuated tripping-rod g, an endless chain c traveling continuously in one direction,
and a loop-carriage provided with upper and lower loosely turning ratchet-carrying
wheels g in continuous engagement with the corresponding sides of said chain,
of a pair of self-locking pawl-levers g2 adapted to engage said ratchets, swinging
latch-levers 2 arranged to hold the pawls out of action, and the front and rear
vertically movable tripping members 6, 1, connected with and actuated by said
rod g, arranged to release the said latch-levers from the pawl-levers at pre-deter-
mined points, thus locking the carriage to the chain, substantially as described
and for the purpose set forth.
9. In an automatic loop-banding machine, the combination with the suitably
mounted concentric twisting-jaw shafts, e, a³, each having fixed and loose belt-
driven pulleys mounted thereon, a shipper for the driving belt of each shaft
and a stop-lever for each of the fixed pulleys, of a continuously revolving shaft d,
a pair of suitably shaped cams 7 secured to the shaft for controlling the move- 2
ments of the said belt-shippers, and a pair of cams 3 also secured to said shaft
adapted to swing the stop-levers into engagement with the fixed pulleys to hold
their respective shafts stationary after the belts have been shipped onto the loose
pulleys.
10. In an automatic loop-banding machine, the combination with the cam-2
shaft d and peripherally slotted bushing 4 adjustably secured thereon, of the
double cam, 24, 23, consisting of the sections 1, 2 and 3, mounted on said bushing,
the center section, 2, being rigidly secured to the shaft itself and having the
outer sections 1 and 3 fixed with relation to each other and secured to the
bushing, substantially as described.
3
11. In an automatic loop-banding machine, the combination with yarn feeding,
cutting, twisting and band-removing mechanisms, and an endless belt or chain
traveling continuously in one direction, of the loop-holding carriage B, means
for detachably securing the carriage to said traveling belt or chain to propel it
back and forth intermittingly, a swinging loop-holder attached to the carriage, 3
vertically movable loop-pins mounted in the holder, and means for retracting
the pins while the carriage is being propelled towards the front end of the machine,
substantially as described.
12. In an automatic loop-banding machine, provided with revolving twisting
jaws actuated by a belt-driven center shaft and belt-driven hollow shaft through 4
which the former shaft extends, a loop-holding carriage B, means for propelling
it to and fro at pre-determined intervals, and a latch 2 pivoted to the carriage,
in combination with a counter-weighted slidable cross-head adapted to be locked
to the carriage by means of said latch, means for tripping the latch, and a
cushioned stop for arresting the cross-head after it has been detached from the 4
carriage, substantially as described.
13. In an automatic loop-banding machine, the two sets of suitably mounted
fast and loose spindle-revolving pulleys p p¹ and h³ h, the continuously running
belts 6 and 5 for operating said pulleys, and mechanisms actuated by said belts
for twisting and doubling the two strands of yarn drawn off from the spool to be 5
converted into a loop-band, in combination with the primary driving pulley p
its continuously traveling belt p³, and intermediate mechanisms for shifting the
said belts p and h, the said belt-shifting mechanisms being actuated and con-
trolled by the said primary driving belt, substantially as described.
14. An organized machine for producing loop-bands automatically, and having 5
the several devices employed therein arranged to operate in substantially the
following order, viz., feeding the yarn through the open twisting-jaws past the

page_text: loon-pins and into the open nippers; then closing the nippers, propelling the loop-
carriage rearwardly and locking it to the weighted cross-head, thus drawing off
the desired length of yarn; then closing the twisting-jaws and severing the yarn
from the spool; then twisting and doubling the yarn thus held by the jaws and
carriage, the latter together with the connected cross-head meanwhile gradually
advancing by means of the shortening of the band; then stopping the rotation of the
twisting-jaws and seizing the thus formed band between the slowly revolving
removing-jaws; then opening the twisting-jaws, releasing the cross-head from
the carriage and locking the latter to the traveling chain, and, finally, tripping
the loop-pins and propelling the carriage ahead to its limit, thus placing it in
position with relation to the twisting-jaws preparatory to making the next band,
substantially as described.
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