Improved Shuttle Relief Motion for Fast Reed Looms.
Year: 1889

page_text: Improved Shuttle Relief Motion for Fast Reed Looms.
1, JACOB JUCKER, of 60, Peter Street, Manchester, in the County of Lancaster,
mechanical 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 :-
The ordinary reed motion used in fast reed looms for stopping the loom when the
shuttle misses entering the shuttlebox frequently fails to act when said looms are run
fast, in consequence of the catches or pawls not dropping quickly enough. If strong
springs are applied to pull the catches or pawls down quickly, the pressure of the
finger on the shuttle tongue backswell and the friction of the shuttle is increased, so
that for picking it and causing it to enter fully into the opposite shuttlebox a very
strong pick must be given, which absorbs a great amount of driving power and leads
to rapid wear and tear of shuttles, pickers, and picking mechanism and to detrimental
vibration of the entire loom. The object of my invention is to relieve the shuttle of
the pressure of the shuttle tongue finger or its equivalent while the shuttle is being
picked, and my invention consists in mechanism for said purpose, which may be used
in combination with the ordinary arrangement of reed protector motion, but is preferably
combined with the arrangement of reed motion for which Letters Patent dated the 28th
December 1886 and numbered 16970 have been granted to me and which relieves the
shuttle from the pressure of the finger while it runs into the box, and my invention is
hereinafter more particularly described and illustrated by the drawings in said
combination.
On the two sheets of drawings appended hereunto, Fig. 1 shews a front view of one
end of the lathe and parts of the loom with my improved reed motion, the other end
being arranged symmetrically to the same.
Figs. 2, 3, and 4, show side views of the same partly in section with the loomcrank
and reed motion in different positions.
Fig. 5, shows a modification of my invention.
Fios 67 and 8 shew details.

page_text: carrying the lathe; e part of the rocking rail to which the swords are attached ; ƒ one
of the brackets in which the rocking rail swings (omitted in figs. 2, 3, and 4): g part.
of the stop rod; h one of the brackets in which the stop rod rocks; i one of the cranks
and one of the crank arms, these parts being arranged in the ordinary manner.
Near each end of the stop rod a catch or pawl / with a broad foot is forged to it.
The ends of the stop rod g are flattened and to each end a lent finger m is bolied, as
shewn separately by lig. 6 in side view and fig. 8 in plan, the bolt-hole in one of these
parts being made oblong so that the lover can be adjusted. The end of the finger is
widened to a square plate m' as shown which passes through an opening of the
buckswell . The latter is cranked at the back to allow the plate m² to pass, as shown,
but otherwise arranged as usual. On each loom side a frog o is arranged in the usual
manner. This frog is formed with the usual nose at the front end, but the back
part is raised as shown, the top of the raised part being curved to the are of a circle
struck from the centre of the rocking rail e aid of such height, that when the foot of
the pawl rides on this part the plate m' is drawn back into the shuttlebox so as to
be distant from the shuttle when the latter is in the box by ahont one sixteenth of an
inch. These positions are occupied by the pawl and finger m while the lathe is in
the position in which the shuttle runs into the box, so that on entering the latter has
only to push back the backswell and has not to overcome the pressure of the spiral
spring, which is attached to the bracket fixed to the sword and to a hook / fixed
in the stop rod g and tends to turn the latter towards the front. This arrangement of
frog, pawl, and finger, which has been already described in the specification of the
patent hereinhefore referred to, however, do not relieve the shuttle from the pressure
of the spring while it is being pickel, where an early picking is required, as is the
case with high speed looms. For as the lathe moves forward, the pawl passes from
the raised back part of the frog and the spring pulls the plate m' against the shuttle p
as shown on fig. 2 and in the absence of other arrangements continuos to do so while
the lathe heats up and returns till the pawl comes again upon the raised part of the
frog. The spring pressure would therefore be on the shuttle while the crank is near
to the hottom centre as shown in fig. 4 at or about which position the pick has be
given. I remove this pressure by the following arrangement;
On the stop rod ga lug 9 is forged opposite each sword. To each lug y a curved
arm r is bolted, as shown more particularly by fig. 7 in side view and fig. & in plan,
the boltholes in one of the parts being oblong so that the arm can be adjusted
relatively to the centre of the stop rol. To the underside of the crank arm & another
curved bracket or arms is attached. The underside of the arms and the upperside of
the arm rare both curved to arcs of a circle struck with the same radius from the
centre of the pint, connecting the crank arin & to the sword d and rounded or tapered
at the ends. While the crank moves from the back centre towards the front centro
through the upper part of its revolution, the arms r and are out of contact with each
other as represented in fig. 2, so that if the shuttle has failed to enter its box, the
springcan pull the pawl down into the notch of the frog as represented by fig. 3,
when the further movement of the lathe pushes the frog o forward against the pin
and laminated spring r and thereby stops the loom in the ordinary manner. When
the crank is at or near to the position marked .r on fig. 4, the arm & comes upon the
arm and slightly depresses its end, thereby turning the stop rod g backwards and
withdrawing the plate m from the shuttle p. The two arms then slide upon euch
other as shewn by fig. 4, without causing any movement of the stop rod in consequence
of the coinciding radial curvature of the sliding surfaces and remain in contact whilo
the crank moves from about the position marked to about that marked y on fig. 4, so
that the plate m is held away from the shuttlo, as shown by fig. 4, by the arms till the
pawl is again upon the raised part of the frog. In this way the shuttle is relieved from
the pressure of the spring while it is being picked at any position of the lathe during
its backward movement. In consequence of this, springs of any desired strength
may be used without affecting the strength of the pick and light picks suffice, so that
driving power is saved and fast. reed looms can he run much quicker than with the
ordinary arrangement of reed motion. The vibration of the stop rod g also is reduced

page_text: to a practically imperceptible amount, and the loom may be turned backwards without
the weaver having to disengage the reed protector motion.
Instead of a curved arms, a bracket with bowl or roller w¹ may be attached to
the crank arm as shewn on fig. 5, and the arm made longer and bent down at the
end as shewn, the upper side being curved to a circle struck from the centre of pin t
with a radius touching the outside of the bowl. This arrangement acts in a similar
manner to that previously described.
The arrangement of curved arm and devices attached to the crank arm for relieving
the shuttle from the pressure of the springs or their equivalent may also be used with
the ordinary reed motion having fingers pressing on the backswell and frogs without
the raised back part described, in order to ease the picking.
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,
In reed motions for fast reed looms, firstly, curved arms attached to the stop rod and
operated by the oscillation of the crank arms on the pins connecting said crank arms
to the swords by means of devices attached to said crank arms in such a manner that
the shuttle is relieved from the pressure of the springs actuating the stop rod, while
the shuttle is picked, substantially as hereinbefore described.
Secondly, the combination with curved arms attached to the stop rod of curved arms
attacked to the crank arms, substantially as herein before described and illustrated, and
for the purpose set forth.
Thirdly, the combination with curved arms attached to the stop rod of brackets and
bowls attached to the crank arms, substantially as herein before described and illustrated
for the purpose set forth.
Fourthly, the combination of the arrangements for relieving the shuttle from the
pressure of the springs actuating the stop rod during the picking hereinbefore
described and claimed with the arrangements for relieving the shuttle from the pressure
of said springs while entering the shuttle box herein before described.
Dated this 28th day of January 1889.
EMMOTT & Co.,
Agents for the Applicant.