improvements in Lappet Looms.
Year: 1896

page_text: Date of Application, 10th Nov., 1896-Accepted, 12th Dec, 1896
improvements in Lappet Looms.
I, JAMES ROBERTON MACCOLL, of 144 Broadway, Pawtucket in the County of
Providence, State of Rhode Island, United States of America, Agent, 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 :-
My improvement in lappet looms is adapted for application to ordinary cotton and
woollen looms already in use, whereby the principle of lappet weaving may be
successfully employed in such looms. And it consists in the employment of a pattern
cbain, provided with adjustable pattern screws or pins, to govern the form and position
of the lappet pattern, and in the improved construction and arrangement of the
lappet mechanism as hereinafter set forth.
Fig. 1, represents a detail front elevation of a lappet loom embodying my
improvement.
Fig. 2, represents an end view of the same.
Fig. 3, represents a section taken in the line 3, 3, of Fig. 1.
Fig. 4, represents a'detail section taken in the line 4, 4, of Fig! 1.
Fig. 5, represents a top view of the needle-bar guide, taken from the line 5, 5, of
Fig. 4.
Fig. 6, represents an enlarged section taken in the line 6, 6, of Fig. 5.
Fig. 7, represents an enlarged detail section of the needle-bars, and the lay beam,
taken in the line 7, 7, of Fig. 1.
Fig. 8, represents an enlarged detail section taken in the line 8, 8, of Fig. 1.
Fig. 9, represents a vertical section taken in the line 9, 9, of Fig. 8.
Fig. 10, represents a detail front view of a portion of the mechanism for actuating
the needle-bars.
Fig. 11, represents a side view of the same.
Fig. 12, represents a séction taken in the line 12, 12, of Fig. 11.
Fig. 13, represents an enlarged detail section taken in the line 13, 13, of Fig. 1.
Fig. 14, represents an enlarged end view of the sprocket roll for the pattern chain.
Fig. 15, represents a detail séction taken in the line 15, 15, of Fig. 1.
Fig. 16, represents a side view of one of the needle-bars.
Fig. 17, represents an enlarged top view, and Fig: 18, a side view of one of
the bar links of the patfern chain, and Fig: 19 represents a modification.
In the drawings, A represents one of the end frames of the loon, B the lay,
C the cam shaft, and D the crank shaft. To the bottom of the lay heam e, are secured
the pendent guide-brackets a, a, which serve to hold the needle-bars b', 62, and
also the shuttle guide bar b, to which latter are attached the shuttle guide pins c, c,
which serve to prevent the contact of the shuttle, with the needles, the shuttle-guide
bar b, being guided at its ends for up and down movement by means of the guide-
brackets d, d; and the needle-bars 6, 63, left free at their ends, and adapted for both
up and down and end wise movement. The shuttle-guide bar bis also supported
against the lateral strain caused by the contact of the travelling shuttle with the
shuttle-guide pins c, c, by means of the pendent guides fifif, which are rabbeted
at their edges, the bar b, being connected to the said guides so as to slide up and
down thereon, by means of the guide pieces g, g, which are attached to the side of
the har, and lap over the rabbeted edges of the said guides f, f.

page_text: Immediately under the needle-bars 61, 62, and the shuttle-guide bar b, are placed
the lifting rods h1, h2, and h, respectively, the said lifting rods being held loosely
at their upper ends, in a lateral extension i, of the guide-bracket a, and at their
lower ends in the holder j, attached to the pivoting-rod k, of the lay B, the said
holder being provided with the slot 1, adapted to receive the forward end of the
lifting arm m, which is secured to the rock-shaft n, having its bearings in suitable
standards o, attached to the floor; the said rock-shaft being actuated to cause the
required up and down movement of the lifting arm m, by means of the upright
arm p, and the cam g, secured to the cam-shaft C; the lifting arm m, being
shown in its elevated position in Figs. 2 and 3, in which position the needless,
will be at their highest position in the shed. The lifting rods h, h, which serve
to cause the up and down movement of the shuttle-guide bar b, are provided with
projecting lugs t, shown in Fig. 8, which are held in continuous engagement with
the top of the lifting arm m, so that the shuttle-guide bar b, will be caused to rise
and fall uniformly at each beat of the lay. The lifting rods h', h', and h², h³,
which serve to raise the needle-bars b', 62, are guided at their lower ends in the
slots u, u', made in the upper end of the holders j, j, the said lifting rods being
each provided with a projecting lug t, adapted for engagement and disengagement
with the lifting arm m; the said lifting rods h', h, and h2, h3, being actuated for
disengagement with the lifting bars m, m, by means of the pins v, vl, of the pattern
chain F, which is held for progressive movement in the projecting frame A', at
the end of the loom; suitable operative connection being made between the lifting
rods and the pins v, 1, of the pattern chain, by means of the levers w, w, pivoted
to the stud, attached to the projecting frame A', the vertical connecting wires a¹, a³,
the parallel bell crank levers c', c, and the horizontal connecting wires d', d², to
the outer ends of which are attached the spiral springs e, e, the wire d', being
attached to the lifting rods h, h, which serve to raise the forward needle bar b',
so as to cause their simultaneous movement for engagement or disengagement with
the lifting arms m, m; and the wire d being similarly attached to the lifting rods h2, h3,
which serve to raise the rear needle-bar 6. The needle-bars 6 and 63, are each,
provided with the downwardly extending arms f, f, from which connection may be
made to the floor, by means of the spiral springs 2, 3, which serve to draw the needle-
bars 61, 63, downward, the endwise movement of the needle-bar being effected by
means of the pattern screws or pins j,j, which are arranged longitudinally in the
bar-links of the pattern chain, and operate upon the cams 1, 13, attached to the
engaging rods m³, m², which are loosely held in the bearings n', n2, of the frame A¹,
the opposite ends of the engaging rods being similarly supported in suitable bearings
at the opposite end of the loom, not shown in the drawing.
Upon the sliding rods m¹, m³, are secured the guides G, G, for the reception of
the downwardly extending arms f, f, of the needle-bars, the said guides being
formed of an arm p', which is secured to either one of the engaging rods m', m²,
by means of the hub p2; and the outer end of the arm p' is provided with a perforation,
whereby it is enabled to slide loosely back and forth on the guide-wire 9', which is
held in the fork 9 of the bracket r, attached to the under side of the breast-
beam H, of the loom. The arm p¹ of the guide G, is provided with the lateral
bosses 2,2, as shown in Fig. 5, the said bosses being made hollow as shown in
the enlarged section Fig. 6.
The bars is secured to the side of the arm p', by means of the belts t³, under
the heads of which are placed the compressed springs u2, which serve to press the
bars toward the side of the arm p', as shown in Fig. 6, so that when either of
the downwardly extending arms f1, 2, of the needle-bars 6', 63, are held in the
space, between the side of the arm p', and the pressure bar s', all backlash
between the engaging rods m¹, m², and the needle-bars 61, 63, connected therewith,
will be prevented; the downwardly extending arms for fof the needle-bars, as
the case may be, sliding back and forth in the space u³, at each movement of the lay;
and this removal of backlash in the joint between the engaging rods m', m³, and the
needle-bars 1, 3, is an important feature.

page_text: The engaging rods m², m², are carried toward the pattern chain by means of the
spiral springs, which are secured to the floor, and the intervening leather
straps, 2, attached to the levers w³, 103, which serve to actuate the arms a³, a',
the said levers and the said arms being loosely pivoted upon the pin y, of the
standard g, and from the upper ends of the said arms a³, a, connection is made
to the engaging rods m', m³, by means of the cords or straps 63, 6; the resilience
of the springs 2, 3, being thus transmitted to the engaging rod m³, m³, and
causing the forward movement of the said rods, in opposition to their backward
movement, which is caused by the action of the pattern screws or
pins ',, of the
pattern chain F, upon the cams 1, P, attached to the engaging rods m, m³, respectively.
The lever d³, is pivoted to the tie beam d³ and operated by means of the cam d',
and the levers 2, 3, are provided with the backwardly extending arms c³, c, from
which connection is made to the forward end of the lever d³, by means of the strap
or cord y', so that upon the upward movement of the lever d³, caused by the action
of the cam d thereon both of the connecting cords or straps 6 and 64, will be
slackened by the backward movement of the upright armis 2 of the levers w³, w³,
from the arms a³, a, as shown in Fig. 12, whereby the engaging rods m', m³,
will be relieved from the pull of the springs v2, v3, so that the said rods and the
needle-bars connected therewith, may be readily moved by the action of the pattern
screws or pins, 3, of the pattern chain F, upon the cams P, 1, and upon the
completion of the forward movement of the pattern chain, the action of the cam d,
will cause the depression of the lever d³, whereby the springs v2, v3, will be again
brought to bear upon the engaging rods m', m³, to hold the cams 1, 2, firmly
against the screws or pins i, j, of the pattern chain, while the needles are being
carried upward into the shed.
The projecting frame A', which serves to support the pattern chain F, is provided
with the bearings e³, e, for the shaft 3, of the sprocket roll, which carries the
pattern chain; the outer end of the shaft f3 of the sprocket roll, being provided
with the hand wheel z, for turning the sprocket roll by hand, when desired; and
the inner end of the said shaft is provided with the ratchet wheel g', by means of
which the sprocket-roll is operated the said ratchet wheel being actuated to turn the
sprocket roll, by means of the pawl g, one end of which engages with the teeth of
the ratchet wheel, and the other end held upon the eccentric 9³, of the crank
shaft D.
Upon the outer end of the shaft 3, of the sprocket-roll is secured the notched
wheel, the notches of which are adapted to receive the roller 3, of the spring
actuated pawl, which is pivoted to the frame A', and serves to hold the sprocket-
roll f firmly in its set position, in which the screws or pins j' and are in proper
engagement with the cams 11, 12, and also serving to prevent the backward movement
of the sprocket-roll.
The sprockets, of the sprocket-roll f', enter the vacant spaces between the
parallel bar links k', of the pattern chain F, the said bar links being connected
to each other by means of the wire links 6, 6. The bar-links k¹, are provided
with the screw-threaded split lugs r, in which are inserted the pattern screws or
pins jj, extending lengthwise of the bar-links, the said pattern screws or pins
being clamped, in their proper position by means of the tightening screws,
which operate to draw the sides of the split lugs together against the sides of the
screws or pins, and the pattern to be formed in the woven web by the action of
the needles, will be governed by the relative position of the forward ends of the
pattern screws or pins of the chain, the said forward ends coming successively
into engagement with the cams l, P, attached to the engaging rods m', m², which
are connected with the needle bars. The rear ends of the bar links k', are
supported against backward movement and held in the same plane, by means of
the head of the sprocket wheel f*.
The screws or pins j',, of the pattern chain may be made to extend outwardly
from the bar-link, instead of longitudinally, as shown in the drawing, Fig. 19
and in that case the sprocket roll, may be arranged with its axis transversely

page_text: of the loom, for action upon the engaging rods m³, m²; and the sprocket roll and
pattern chain may be arranged to move back and forth with the lay instead of
being separately supported.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what
I claim is:
1. In a pattern chain for lappet looms, the combination of the bar-links, with
adjustable pattern screws or pins, the varying positions of which relatively to the
bar-links govern the form and position of the lappet pattern, substantially as
described.
2. In a pattern chain for lappet looms, the combination of the bar-links, with
adjustable screws or pins arranged either longitudinally or transversely in the bar-
links to form the pattern, and the screw pins arranged to govern the lifting of the
needles, substantially as described.
3. In a lappet loom, the combination of a pattern chain, with a needle bar, an inter-
mediate connection between the needle bar and pattern chain, means for holding the
intermediate connection against the pattern chain and means for withdrawing said
holding means, from its action upon the intermediate connection, preparatory to the
forward movement of the pattern chain, substantially as described.
4. In a lappet loom, the combination of a pattern chain, with a needle bar, a cam
connected with the needle bar and bearing against the pattern chain, means for
holding the cam against the pattern chain, and means for withdrawing said holding
means from its action upon the cam, preparatory to the forward movement of the
pattern chain, substantially as described.
5. In a lappet loom, the combination of the lay and a needle-bar carried by the lay,
with the pattern chain and the engaging rod held independently of the lay, and a
sliding connection between the needle bar and the engaging rod, substantially as
described.
6. In a lappet loom, the combination of the lay, and a needle bar carried by the
lay, with the pattern chain, and the engaging rod held independently of the lay,
means for holding the engaging rod against the pattern pins or projections and
a sliding connection between the needle bar and the engaging rod, substantially as
described.
7. In a lappet loom, the combination of the lay, and a needle bar carried by the
lay, with the pattern chain, and the engaging rod held independently of the lay,
means for holding the engaging rod against the pattern projections of the
chain, a sliding connection between the needle bar nd the engaging rod;
and means for preventing backlash at the sliding conection, substantially as
described.
8. In a lappet loom, the combination of a needle-bar, a vibrating lever for causing
the movement of the needles into the shed, with pattern chain mechanism adapted to
govern the longitudinal position of the needle-bar, and control the operative connection
of the needle bar with the vibrating lever, and a bar provided with the shuttle guide
pins, arranged in continuous operative connection with said lever, substantially as
described.
יזי
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.