Year: 1892

page_text: Date of Application, 16th Feb., 1892-Accepted, 19th Mar., 1892

page_text: fed from right to left by means of a feed screw C, driven from the main or driving
shaft D of the machine, through the medium of suitable gearing and other con-
nections not shown. The shaft D is provided with the ordinary fast and loose
pulleys, as shown in Fig. 1.
Between vertical end pieces or standards b, b, rising from the bed A are secured
four horizontal tubular rods c, upon which slide the hangers G, which support the
heddles H. H, the upper and lower bars of which fit within rectangular eyes or
vokes at the ends of said hangers.
I is the heddle-cord separating mechanism, and J the reed dent separating
device, constructed and operating as fully described in my aforesaid Letters Patent.
dated October 20, 1891.
K represents the reed, which is supported in a suitable frame secured to the
standards; and L is the warp-drawing needle, which is a flat steel bar pointed
and barbed at its front end, said needle being reciprocated in a tubular casing by
suitable mechanism fully described in my aforesaid Letters Patent dated 1
October 20, 1891.
The warp-threads are wound upon the warp beam M, journaled in bearings in a
suitable stand on the floor as seen in Fig. 2, and said warp-threads pass over a long
guide bar d. supported by suitable brackets projecting from the framework of the
machine. Over this guide bar is pressed an inverted U or trough-shaped spring 2
metal clamp e, the warp threads being confined between the bar d and the clamp e.
The lower clamping bar or device N for the warp-threads is supported by a tubular
rod 100 secured at its opposite ends to suitable brackets on the framework, and
said clamping device consists of a long stationary flat bar f, and a removable
clamping bar g, the latter being held tightly in place against the face of the flat?
bar by removable spring metal clamps /, the warp-threads being confined between
the two bars; and the inner side of the bar g which presses against the warp-
threads being covered with felt, cloth, or other material to allow each thread to be
easily and independently withdrawn by the needle L without disturbing any of the
adjacent threads, this clamping device being substantially like that shown and
described in my aforesaid Letters Patent dated October 20, 1891. In addition to
the two clamping bars or devices above described, 1 employ in my present invention
an intermediate or supplementary clamping bar or device P, composed of two
bars 101, 102, constructed and held together in the same manner as the bars of the
lower clamping device N, the inner side of the bar 101 being covered with felt or
cloth. This clamping device l' is supported at a suitable distance above the lower
clamping device, and is rigidly connected therewith by means of a series of vertical
connecting bars i extending from one to the other, as seen in Figs. 1, 2, 3, and 4,
whereby when the lower clamping device N is adjusted longitudinally by turning
the hand wheel k of the screw shaft, (not shown), connected therewith, the inter-
mediate clamping device P will be simultaneously moved in the same direction,
thus keeping the warp-threads in their proper vertical position. The mechanism
by which the warp-threads 20 are successively selected and carried one at a time
against the barbed needle L into a position to insure their being caught by its
hook 21 as the needle is retracted so as to be drawn thereby through the eye of the
heddle and between the dents of the reed, will now be described.
Qis a standard or frame which is bolted to the carriage B, and carries at its
upper end a table R forming a part of said frame, upon which is mounted a rotary
disk S, which carries the rotating sliding selecting hook m, by means of which the
warp-thread is carried against the reciprocating needle L in a manner to be par-
ticularly described hereafter. To a central hub or projection 15 on the upper side
of the disk or carrier S is secured eccentrically an elliptical gear n, which engages
with a corresponding elliptical gear p immovably secured eccentrically upon a spur
gear 9, which revolves on a headed stud r. This gear 9 is driven through the
medium of an intermediate gears by a gear t, fast on the upper end of the vertical
shaft T, driven from the main or driving shaft of the machine through the medium
of suitable gears and shafts not shown.

page_text: The table R is provided with two jaws or extensions 25, 26, Figs: 8 and 9, forming
between them a narrow slot u, and on these extensions are placed two adjustable
plates 27, 28, having bevelled edges, upon which plates are secured two narrow
plates 29, 30, also having bevelled edges, four bearing edges being thus formed
upon which the warp threads are caused to bear as they pass into the space u
between the two jaws 25, 26. The upper pair of bearing edges are located just
above the level of the selecting-hook m, while the lower pair of bearing edges are
located just below the level of the said hook, which as it is rotated, passes
horizontally between the inner ends of said upper and lower pairs of bearing edges
so as to catch the portion of the warp-thread which is between the same, the inner
ends of the plates 29 and 30 overlapping, and the inner ends of the plates 27, 28,
underlapping said selecting-hook, as seen in Fig. 14. The plate 27 carrying the
narrow plate 30 is made adjustable by means of screws w, w, to enable it to be set
at the required distance from the edge of the plate 28. The plate 28, which forms
the movable portion of the jaw is connected to a slide 31, moving in a guideway in
the table R, and to this slide is pivoted a lever 32, also pivoted at its opposite end to
the table R, a projection 33 of this lever being acted upon by a cam disk 34 on the
shaft T, whereby the plates 29 and 28 are advanced sufficiently to cause them to
respectively overlap and underlap the plates 30 and 27, which movement causes
the plates 28 and 29 to press the warp-threads out of a straight line and cause them
to bear against the edges 27 and 30, as well as the edges 28 and 29, as seen in
Figs. 8 and 9, the two clamping devices N, P, readily permitting the threads to be
drawn out as they are pressed out of a vertical line by the said bearing edges. By
thus causing the warp-threads to be tightly stretched over four bearing edges as
described, they are kept parallel or side by side, without liability of riding over
each other as the table R is fed forward with the carriage B, and at the same time
these warp-threads are held tightly in place above and below the selecting-hook
simply by their friction against the said bearing edges, and without being clamped
between the same, and the said threads are thus held firmly in position while being
caught by the selecting-hook m. The warp-threads are however still further held
tightly in place while being acted upon by the selecting-hook by the intermediate
or supplementary clamping device P before described, which is located, as seen in
Figs. 3 aud 4, a short distance only below the level of the selecting-hook, and serves
to support the threads and prevent them from becoming slack at this point, and
also prevents said threads from being jarred and thrown out of line by the
concussion produced by the descent of the nippers W, to be hereafter described,
and their carrying slide.
The disk or carrier S is made in two pieces held together by screws as seen in
Fig. 17, the under and smaller portion of which fits and rotates within a circular
recess in the table R, the disk rotating upon a stud 36, the head of which rests
upon the hub 15 of the disk S, and fits within a recess formed for its reception in
the underside of the elliptical gear n, which is securely fastened, as before
described, to the hub 15 of the disk eccentrically with respect to the centre thereof.
Within a shallow groove in the lower portion of the disk S is fitted a slide 37,
which is provided at one end with a hook shaped portion forming the warp-thread
selecting hook m, within which is formed an eye or aperture 38 upon its outer side,
said opening being closed by a light spring 39, the free end of which extends
beyond the eye, and lies against the edge of the hook m in such manner as to
permit the entrance of a single thread only at a time into the eye 38 as the hook m
is carried by the rotation of the disk S past the line of warp-threads stretched over
the four hearing edges 27, 28, 29, and 30, before described. The selecting-hook m
is forced out beyond the periphery of the disk S by a light flat spring 40, and at
the end of the slide opposite to the hook m is a pin 41, which projects up through
a slot in the disk, and, during a portion of the rotation of said disk, rides over the
edge of a cam plate 42, by which means the slide 37 is retracted against the
influence of the spring 40. When however the point of the hook m reaches
the warp-threads, the pin 41 rides down an incline 43 at the end of the cam plate 42

page_text: which permits the slide 37 to be forced outward by the spring 40, causing the
inclined side 44 of the hook m to bear against the foremost warp-thread, producing
a tension thereon, which thus insures the thread passing into the eye of the said
selecting-hook. The single thread thus selected and separated from the series is
then carried by the selecting-hook along the guide rod a', and against the lower edge
of the needle L, which has by this time completed its outward movement, and into
a position as before described, to insure its being caught by the hook or barb of the
needle, as seen in Fig. 6, which as it is retracted, carries the thread back through
the eye of the heddle and through the reed.
The eye or aperture 38 of the selecting-hook is placed near to its corner 46, thus
leaving the least possible portion of metal projecting behind it compatible with
strength, and this corner 46 is rounded off, as seen in Figs. 5 and 6, the advantage
of this construction being that there is no angular projecting portion left behind the
eye to come into contact with the thread immediately following that which has
been caught by the hook, and consequently all liability is avoided of its being struck
and thrown out of position by the rear end of the selecting hook as the latter is
carried past it.
Just before the reciprocating needle L commences to draw back the warp-thread
the plates 28 and 29 are drawn back from the opposite plates 27 and 30, thus
relieving the strain upon the warp-threads produced by the bearing edges, and
leaving these plates in a position to permit of the free entrance between their front
ends of the line of warp-threads as the table R is fed forward with the carriage B.
It is obvious that the best results can be attained by causing the selecting
hook to move slowly at the time it is taking a warp-thread, as the liability of its
skipping or taking more than one thread at a time is thus avoided, and that after
the thread has passed into the eye, a quick motion to compensate for the time thus
lost is necessary to cause the selecting-hook to complete its revolution within
the required time. This I attain by rotating the selecting-hook m at a variable
speed through the medium of elliptical gears as before described, these gears being
so arranged as to cause the disk S to move slowly at the time the selecting-hook is
operating upon or catching a warp-thread, while as soon as said thread has been
caught by the hook, the speed of the latter is quickened to make up for the time
lost in reducing its speed before catching the thread, the motion being so regulated
that the complete revolution of the selecting-hook will be effected in the exact
time required to bring it again into the position to catch the next thread at the
proper moment, no actual loss of time resulting from the reduction of speed of the
hook, as it completes its revolution in the same time as would be the case if it was
rotated at a uniform speed by means of ordinary circular gears.
Beneath the bearing plates 27, 28, 29, and 30, are a pair of horizontal nippers W,
which have a vertical movement toward and from said bearing plates, and are
alternately opened and closed so as to take up any slack in the warp-threads as
they are presented to the selecting device. The jaws of these nippers are both
mounted upon a slide 50, moving in vertical guideways on a side extension of the
standard Q, said jaws being pivoted at 51, 52, and connected by a link 53, Fig. 13,
whereby the motion of one is communicated to the other to cause them to move
simultaneously in opposite directions. The slide 50 is moved by a cam 54 on a
short shaft 55, to which is secured a bevelled wheel 56, which meshes with a
bevelled wheel 57 on the shaft T, said cam acting on an anti-friction roll on the
lower end of an arm 58, projecting down from the slide 50, a spring 59 serving to
retract the slide after it has been raised by the cam. The nippers W are opened
against the influence of a spring 60, by a wing or plate 61 projecting from a
vertical rod 62 passing up between the nippers and supported at its opposite ends
in suitable bearings. This rod 62 is partially rotated on its axis to cause the
wing 61 to act upon and open the nippers by a cam 64 on the short shaft 55, which
is brought into contact with a pin 65 on the shaft 62, and as soon as this pin drops
off the projection of the cam, the rod is returned to its normal position by a
spring 67, which encircles said rod. These nippers are similar in construction and

page_text: mode of operation to those described in my aforesaid Letters Patent dated
October 20, 1891, serving in the same manner to stretch and take up any slack in
the warp-threads before the latter are presented to the selecting device, and form
no part of my present invention.
The two bars 101, 102, which form the intermediate clamping device P are kept
tightly together at the point where the threads are being taken by the selecting
hook, by the pressure thereon of two anti-friction guide rollers b, c, on the table R,
and standard Q, the guide roller being mounted upon a stationary stud secured
to the underside of the table R, and being adapted to bear against the inner edge
of the inner bar 102, while the guide roller e' bears against the outer side of the
outer bar 101. This latter roller c¹ is mounted in the outer end of a swinging
frame e pivoted at f' to the standard Q. This frame e¹ takes a bearing upon the
outer leaf of a spring 9' secured to the standard Q, which spring forms a yielding
rest therefor, and serves to keep the roll at all times firmly against the said
clamping bar with a yielding pressure, and in this manner the two bars of the
intermediate clamping device are kept at all times firmly in contact with each
other in order to maintain the desired tension upon the warp-threads close to the
point where they are being drawn out by the selecting-hook so that each thread
can be easily and independently withdrawn by the needle L without disturbing or
slackening any of the adjacent threads.
The outer side of the outer bar of the lower clamping device N bears against an
anti-friction guide roller d', which is mounted in a frame n', similar to the frame e¹,
and likewise resting against a spring i similar to the spring g¹, this roll serving to
keep the two bars of the lower friction device closely together as required, the
inner bar being stiffened and prevented from springing by the tubular rod 100 by
which it is supported. These springs g¹, i¹, are each provided with an adjusting
screw ¹, by means of which the pressure of the guide rollers upon the bars of the
clamping devices may be regulated as desired.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a warp-drawing machine, the combination, with the warp-drawing needle>
of a warp-thread selecting-hook and elliptical gearing for rotating the same at.
variable speed, substantially as and for the purpose set forth.
2. In a warp drawing machine, the combination, with the warp-drawing needle,
of a warp-thread selecting hook mounted upon a disk or carrier, and elliptical
gearing for rotating the same at variable speed, substantially as described.
3. In a warp-drawing machine, the combination, with the warp-drawing needle,
of a horizontally rotating disk or carrier, a slide moving horizontally in said disk
or carrier, and provided at its outer end with a warp-thread selecting-hook having
an inclined face and an eye, a light spring covering said eye, means for projecting
the slide to cause the selecting-hook to take a single warp-thread, and afterward
retracting said slide, and elliptical gears for rotating the disk or carrier and
selecting-hook at variable speed-substantially as and for the purpose set forth.
4. In a warp-drawing machine, the combination, with the warp-drawing needle
and the rotating disk or carrier, of the slide 37, carrying at one end the selecting
hook m provided with an eye or aperture 38, a light spring for closing one side of
said aperture, said selecting-hook having that portion immediately in the rear of
the eye rounded to avoid contact with the warp-thread immediately following that
which has passed into the eye, substantially as set forth.
5. In a warp-drawing machine, the combination, with the warp-thread selecting
hook, of a pair of plates having bearing edges arranged to pass one over the other,
whereby the warp-threads are drawn out of a straight line and caused to bear upon
and be stretched over said edges without being clamped between the same, sub-
stantially as set forth.
6. In a warp-drawing machine, the combination, with the warp-thread "selecting

page_text: hook, of a pair of jaws provided with an upper and a lower pair of bearing edges,
the former located above and the latter below the path of the selecting-hook which
passes horizontally between the inner ends of the said upper and lower pairs of
bearing edges, the two bearing edges of a pair being arranged to pass one over the
other, whereby the warp-threads are drawn out of a straight line and caused to
bear upon and be stretched over said four bearing edges, two above and two below
the path of the selecting-hook, at the time the latter is taking a thread, and with-
out being clamped between said bearing edges, substantially as described.
7. In a warp-drawing machine, the combination, with the warp-thread selecting
devices, the nippers W, and the upper and lower warp-thread clamping bars, of an
intermediate or supplementary clamping bar or device connected to and adapted to
move with the lower clamping bar when the latter is adjusted, whereby the warp-
threads are kept in a vertical position; said intermediate clamping bar being
located below and near the level of the warp-thread selecting-hook, whereby the
warp-threads are prevented from being jarred and thrown out of line by the con-
cussion produced by the descent of the nippers W and their carrying slide,
substantially as described.
8. In a warp drawing machine, the combination, with a warp-thread selecting-
device, the nippers and the upper and lower warp-thread clamping bars, of the
intermediate clamping device P, consisting of an outer bar 101, and an inner
bar 102, the latter connected with the lower clamping device N by means of vertical
connecting pieces or bars, substantially as described.
9. In a warp-drawing machine, the combination, with the intermediate warp-
thread clamping device consisting of two bars between which the threads are held,
of the traversing frame or standard carrying the warp-thread selecting device and
provided with anti-friction guide rollers adapted to tear upon the inner and outer
bars of said intermediate clamping device near the point where the threads are
being taken by the selecting-hook, whereby said threads are kept at the required
tension, substantially as set forth.
10. In a warp-drawing machine, the combination, with the intermediate and
lower warp-thread clamping devices, of the traversing frame or standard provided
with the inner anti-friction guide roller ', mounted upon a stationary stud and the
outer anti-friction guide rollers c, d, mounted in movable frames, springs forming
yielding rests for said movable frames, and adjusting screws bearing upon said
springs, whereby the pressure of the guide rollers upon the said clamping devices
may be varied, substantially as set forth.
Dated thie 16th dow of Februa1909