IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1870

page_text: PROVISIONAL SPECIFICATION left by David. Dalglisli at the Office
of the Commissioners of Patents, with his Petition, on the 11th
February 1870.
I, DAVID DALGLISH, of Glasgow, in the County of Lanark, North
Britain, Manufacturer, do hereby declare the nature of the said Inven-
tion for "IMPROVEMENTS IN LOOMS FOR WEAVING," to be as follows, that is
to say :-
This Invention consists, first, of improvements in the construction,
arrangement, and working of the pattern mechanism for making the
necessary changes of the double, triple, and other number of compound
shuttle boxes of power looms for weaving striped, checked, and other
ornamental fabrics, so as to reverse the pattern chain barrel and chain
of pattern cards when the pattern or any main part of it has a
" centre
or will reverse in the backward direction or be a repcat or multiple of
the said forward and backward whole or part of the pattern, by making
the pattern chain of the few cards forming the said repeat or multiple
part or parts of the pattern cards with one extra card for the change or
reversing action, all connected as a short endless pattern chain (instead
of the long chains containing a set of cards for every repeat throughout

page_text: the whole pattern, turned in the one direction) to be reversed along
with the barrel, as stated, at every repeat of the same, either backwards.
or forwards as often as the repeating part of the chain is contained in
the whole or part of the pattern of which it is a multiple. This re-
versing of the card barrel with its short chain of pattern cards is effected
by the addition of a second or backward turning pall working into the
teeth of the "star" wheol of the barrel (on the opposite sido to that.
of the ordinary pall) for turning it in the opposite direction, cither as
two separate palls or as a compound pall, the one being jointed to the
other, in either case actuated so that the ordinary or forward acting
pall is tilted (and held in its actuating position by a weight, spring, or
otherwise) while the backward acting pall is out of action, and vico.
versa, when the backward acting pall is tilted or thrown into gear the
other forward acting one is thrown out of gear, which would thus work
the barrel in either direction respectively according to whichever pall
was thrown into acting position in the ordinary manner, cither. by the
force and motion of the reciprocating barrel (when it is made the
actuator and the fulcrum of the pall or palls are stationary) or by the
reciprocating motion of the palls when they are made the motive agent,
and the fulcrum. of the card. barrel is stationary. The tilting of the
backward actuating pall is effected by one arrangement, as applied to
a two-shuttle box loom, by a fixed or stiff friction jointed rod attached
to the lever for working tho spear or shuttle box or other reciprocating
part in connection therewith, all so that when the pattern card makes
a-change and brings the shuttle box and coloured weft into action (in a
line with the "race") corresponding to that which is desired to bo
woven during the backward traverse of the barrel and pattern, this
motion makes the point of the said rod tilt the backward acting pall
into gear with the "star" wheel and removes the forward one out of
gear, which will cause the barrel to turn in the backward direction every
two "shots" of the said weft, until the next change or pattern pin reverses
the shuttle boxes, which motion would relieve the backward acting
pall out of gear, and throw in the forward one, or allow its weight or
spring to do so in the ordinary manner, and the tilting rod might be
turned out of its acting position laterally upon its stiff friction or other
équivalent joint by the hand of weaver, or by an-automatic, mechanism
when desired taken from the cloth " taking up" roller of the loom,
or the loom might be stopped by an equivalent automatic action taken
from. the said rolle or by a pattern or raised pin in the pattern chain,

page_text: "
which latter mode is more applicable to long reversing patterns with
a number of shuttles, all as will be herein-after more fully described.
When these improvements of tilting the actuating palls of the "star"
wheel and chain barrel are applied to three, four, and other compound
shuttle box mechanism and looms, it is preferred to throw the onc;out
and the other into gear simultaneously by a stepped or. duplex-long
and short pin, one inserted into or projecting up from one end of the
last card at each end of the reversing chain of cards, these pins being
right and loft handed, or having the long and short pins on their
reverse sides respectively, which pins as they come round and the
barrel is reciprocated are made to act on the heads of two rods, or it
may be levers, attached by a link or otherwise to the tilting palls
of the star wheel so as to reverse the pattern cards, all otherwiso
essentially as described in the former instance as applied to two boxes.
When it is a part of the whole pattern only which is worked by reversing
the card chain in this way (or a part of the pattern chain) and it is
found desirable to stop the loom when it has worked to the end of the
reversing part of the pattern and chain, as to allow the weaver to mako
any short change of a different weft and shuttle by hand, and set on
the loom with the pattern. mechanism stopped or out of action, so.as
to work the extra weft as for cords or narrow stripes of a few shots,
occuring only at great distances or intervals in the otherwise long
repeating pattern, which when worked and the regular pattern shuttle
replaced, the loom and pattern mechanism can then be set on, so as
to
go on weaving the repeating pattern, and the said stopping of tho
loom is effected for accurate patterns and purposes. by a special pro-
jecting pin in the last card of the repeating pattern chain, or it may
be at any other part of the pattern where such stoppage is desired
the purposes before referred to (and by preference fixed on the opposite
side of the cards to that of the pins for working the reversing palls),
which stopping pin when it comes round and is reciprocated with the
barrel moves or strikes the head of an actuating rod or lever connected
by a link or otherwise to a lever on the long oscillating stopping spindle
of the loom, and which when thus turned by the said stop pin stops.
the loom in the same manner, as when this spindle and its connections
are made to do it by the weft fork in disengaging the spring stopping
lever from its holding notch. But when it is not required to stop
the loom so accurately_at_the_completion-or other part of the reversing
pattern for a few shots of the weft, as before referred to, it is stopped

page_text: by another improved automatic arrangement derived or taken from the
regular motion of the cloth "taking up" roller by a small pinion
fixed on its spindle working into a larger wheel revolving on a fixed.
stud having a lateral projecting pin, which as it comes round acts
on a lever and holding and releasing pall so as to gradually disengage
the latter against the power of a weight or spring until it lets an abutting
lever or block instantaneously fall in the front and path of the re-
ciprocating stopping bar of the lathe, and thus stop the loom when
the proper length of cloth or repeats of the pattern is woven and
measured over the "take up" roller, when the weaver can make the
changes required and set on the loom and pattern mechanism again.
It is to be understood that hollows or depressions will answer in the
pattern cards instead of the special projecting pins described upon them
for engaging and disengaging the reversing palls and for stopping the
loom by and at the particular part of the pattern chain of cards where
these special pins or depressions are placed, the main features of novelty
in these being the making of the pattern chain to reverse the said palls
and to stop the loom, all otherwise substantially as herein-beforō
described.
'
These several improvements of this Invention when applied to ordinary
two and three shuttle box looms will make them capable of weaving a
great class of goods of comprehensive and long patterns, which they
have not heretofore done, and which heretofore have required to. be
donc in looms with a greater number of shuttle boxes and their con-
sequent complex mechanism, and looms fitted with the improved 2
reversing chain of cards are worked with much shorter and more con-
venient chains of these cards and with a correspondingly great deal
less expense in tho use and maintainance of such cards.