Improvements in Looms for Weaving Lappet Cloths and the like.
Year: 1895

page_text: Date of Application, 5th July, 1895
Complete Specification Left. 7th Jan., 1896-Accepted, 22nd Feb., 1896
PROVISIONAL SPECIFICATION.
Improvements in Looms for Weaving Lappet Cloths and the like.
We, JOSEPH DUGDALE, of the Firm of John Dugdale and Sons, of Soho
Foundry, Blackburn, in the County of Lancaster, Machine Makers, and RICHARD
TALBOT, in the employ of the said Firm, Engineer, do hereby declare the nature
of this invention to be as follows:-
Our invention relates to improvements in looms for weaving what are known as
lappet cloths in which the pattern is produced by needles fixed upon bars, and the
chief objects of our improvements are to simplify the motions for reciprocating and
disengaging the needle bars and also to enable the pattern to be readily changed
without employing the present expensive wooden pattern wheel.
In carrying our improvements into effect we employ a pattern lattice placed
preferably outside the frame of the loom and actuated preferably from the
oscillating shaft upon which the lathe is mounted or from the crank shaft. The
pegs on the lattice act upon pivoted weighted levers which are connected by
flexible couplings to the traverse bars on which are mounted the needle bars
actuated by the ordinary lifting motion. The traverse bars when released by
the weighted levers are moved in one direction by springs and in the other direction
by the reverse movement of the weighted levers which are all raised by means
of a stud on an arm secured to the oscillating shaft for the purpose of allowing
the pattern barrel to be turned easily. To another arm on the oscillating shaft
is pivoted a lever which has a hook at its other end that engages the teeth of a
ratchet wheel secured to the shaft of the lattice barrel and by which the latter is
caused to rotate intermittently.
The pegs on the lattice also actuate a disengaging lever (or two or more such
levers) which is employed when weaving spot and similar patterns connected by a
floated thread this lever being connected by wires or their equivalents to the
ordinary pivoted fingers which act as fulcra when in their normal positions to the
lifting levers for the needle bars.
Dated this 4th day of Tμl 1005
H. B. BARLOW & GILLETT,
Agents for Applicants.
We, JOSEPH DUGDALE, of the Firm of John Dugdale and Sons, of Soho
Foundry, Blackburn, in the County of Lancaster, Machine Makers, and RICHARD
TALBOT, in the employ of the said Firm, Engineer, 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 looms for weaving what are known
as lappet cloths in which the pattern is produced by needles fixed upon bars, and
the chief objects of our improvements are to simplify the motions for reciprocating
I Di Q77

page_text: and disengaging the needle bars and also to enable the pattern to be readily changed
without employing the present expensive wooden pattern wheel.
In carrying cur improvements into effect we employ a pattern lattice placed
outside the frame of the loom and actuated preferably from the oscillating shaft
upon which the lathe is mounted, or from the crank shaft.
And in order that our invention may be fully understood and readily carried
into effect we will describe the accompanying sheet of drawings reference being had
to the figures and letters marked thereon.
Fig. 1 is a side elevation, and Fig. 2 a front view of part of a loom to which our
improved lappet motion is applied.
a is the frame of the loom, b the crank shaft, c the lathe mounted upon the
Oscillating shaft e¹; d is a lattice pegged with pegs of different lengths by which
the lappet pattern is produced, e is the lower and e¹ the upper lattice barrel; on
the shaft of the barrel e is secured a ratchet wheel e² and below the barrel e are
four weighted levers f fulcrumed upon a stud f³, the weighted ends of the levers
being connected by flexible couplings 9 to bars g'; these bars are connected as
usual at the other side of the loom to springs, not shown; ou each of the four
bars is mounted a pair of upright guides 92 in which are fitted four needle bars h
which carry needles /¹. The needle bars h are lifted as usual from the shaft c¹ by
means of levers ; secured upon it; to the levers are pivoted levers k which
actuate lifting bars the upper ends of which are bent over the bars g' upon
which ends the needle bars / rest; the other ends of the levers k rest under
fingers m pivoted at m¹ which when in their normal positions form fulcra for the
levers and cause them at every oscillation of the shaft to raise the lifting bars
and needle bars h. On the oscillating shaft c¹ is secured an arm n to which is
pivoted a lever n' with a catch at its other end which engages with the ratchet
wheel by which an intermittent rotary motion is imparted to the lattice barrel e;
to another arm o secured to the shaft c is secured a stud o' the function of which is
to support the levers and take their weight off the barrel e whilst the latter is
being turned by the catch lever n¹ and ratchet wheel e2, but the stud o' is not an
essential feature of our invention as it can be dispensed with if preferred in which
case the weight of the levers would be borne by the barrel e.
Pivoted on a stud carried by the frame are a pair of levers P for disengaging
the needle bars when weaving spot and similar patterns; these levers are actuated
by pegs on the lattice d and the other ends of these levers are connected by wires
or equivalents g which pass over swing arms 9' to the fingers m so that when the
end of a lever p is depressed by a peg the connected finger or fingers will be moved
away from its lever & and the corresponding lifting bar and needle bar will not
be raised until the finger m is set at liberty.
9
In operation the lattice barrel e turns while the lathe beats up and as the lathe
goes back the needle bars are raised, the pegs if any, on the bottom lattice bar
hold down the ends of these levers on which they act and thus prevent their
weighted ends moving downward with the stud o' so that the flexible connection
between each lever which is held down by a peg is slackened and the connected
reciprocating bar g' is moved or traversed by the action of the spring at its other
end a greater or shorter.distance according as to whether the peg is a long or a
short one, the needle bar corresponding to the reciprocating bar g¹ being raised
by its lifting bars l. After the lattice barrel e has turned and carried the peg (or
pegs) clear of the lever (or levers) the weighted end of said leverf falls on to the
stud o' and draws back the reciprocating bar g' and its needle bar / to their normal
positions.
The warp for the needles which produces the lappet pattern is placed upon a
small beams and the warp threads ŕ are woven into the cloth when the bar and
needles h' are raised.
When weaving a continuous lappet pattern the disengaging levers p are not
operated but when a spot or similar pattern is being woven one (or both) of the
disengaging levers p is employed to prevent the spot needle bar or bars being lifted

page_text: between the spots as during this time the needle bar remains down and the threads
are floated which floats are afterwards removed.
Although we have shown two disengaging levers, one would be sufficient in nearly
every case.
By employing a pattern lattice we are enabled to dispense with the costly pattern
wheel commonly employed in a lappet motion and by placing the pattern lattice
outside the frame of the loom we are enabled to use a very long pattern lattice and
consequently patterns of practically any length can be woven; also by changing the
pegging of the lattice or by changing one lattice for another any variety of patterns
can be readily produced.
In place of pegs we could employ bowls of different diameters on a lattice or
chain to act in conjunction with the pivoted weighted levers.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
:-
In a loom for weaving lappet cloths-
1. The arrangement use and application of a pattern lattice placed outside the
frame of the loom substantially as and for the purposes herein described with reference
to the accompanying drawings.
2. The combination with a pattern lattice, of pivoted weighted levers for actuating
the reciprocating traverse and needle bars substantially as and for the purposes
herein set forth.
3. The combination with a pattern lattice and pivoted weighted levers for actuating
the reciprocating traverse and needle bars, of the stud o¹ or its equivalent for
raising and supporting said levers substantially as and for the purposes herein set
forth.
4. The combination with a pattern lattice, of a lever or levers for engaging or
disengaging the lifting motion for the needle bars substantially as and for the
purposes herein set forth.
5. The general arrangement and combination of parts embodying our improve-
ments substantially as herein set forth.
Dated this 6th day of Tona 1900
H. B. BARLOW & GILLETT,
17 St. Ann's Square, Manchester, Agents for Applicants.