Improvements in Shedding Mechanism of Looms for Weaving.
Year: 1894

page_text: Date of Application, 21st Nov., 1894
Complete Specification Left, 16th Aug., 1895-Accepted, 21st Nov.. 1895
Improvements in Shedding Mechanism of Looms for Weaving.
I, JOHN WARD, of Ingham Street Iron Works, Blackburn, in the County of
Lancaster, Machine Maker, do hereby declare the nature of this invention to be
as follows:-
This invention relates to improvements in dobbies or shedding mechanism of
looms for weaving, and to improvements in appliances connected therewith, and
consists,
:-
Firstly Of improved combination and arrangement of parts whereby the shed
is before each pick closed to "half-centre" before being again fully op ned; the
healds are always kept level, and the warp threads are slackened at every pick for
convenience in weaving what are known as "lenas," or "split ups."
Secondly-Of improved combination and arrangement of parts constituting the
under motion for maintaining an equable tension on the healds at a given time, and
for removing the strain from the healds at the time the latter are to be raised,
the greatest amount of tension being on the healds when in the lowest position.
According to this invention, I employ ordinary jack levers, to which the healds
are attached, and each jack lever is by a double hooked link connected to two
cranked baulk levers, ou each of which is a draw hook operated by tumbler lever.
The draw hooks and their knives are lineable and the tumbler levers are operated
by one or two barrels. When one barrel only is employed, needles are used to
transfer the motion from one set of tumbler levers to the other. The draw hooks
may be worked in a vertical position, and in this case, the draw bars are worked
from a horizontal rocking bar. By this arrangement the shedding mechanism can
be brought nearer the centre of the loom, which in many cases is a great
convenience.
When the draw hooks of one set are operated, the cranked baulk levers engage
with one side of the double hooked links and operate the jacks: and when the
second set of draw hooks operate, the first set partly lower the jacks before the
second set of draw hooks cause the cranked baulks to engage with the other side of
the double hooked links, which are met when descending, by the ascending cranked
baulk levers.
The improved under motion consists of bell-cranked levers, on each of which are
two projections or hooks on opposite sides of the said levers. The projections or
hooks are by spring links or rods connected to fixed points or rods. The spring
links pull in opposite directions, and should one of the springs break, the other
will prevent the heald moving violently upwards and damaging the warps. The
healds are by cords attached to the ends of the levers, and the opposite ends or
tail pieces are connected together by links, so that each pair of levers work in
unison. In order to remove tension from the lower part of the healds at the time
of raising the latter, I connect to the jack levers, cords which passing over guide
pulleys are attached to arms of the bell-crank levers, so that when the jacks are
raised, the cords pull the bell-crank levers, turning the latter on their fulcrum
studs, expanding the spring links, and slackening the lower connecting cords of the
healds.
When jack levers are employed for under motion, the projections or hooks are
formed on each side of such incks

page_text: The arrangement of under motions above described, allow of the parts being
placed more compactly, and occupying less space beneath the loom.
Dated this 20th day of November 1894.
BRIERLEY & HOWARD,
Penny Bank Chambers, Halifax, Agents for the Applicant.
Improvements in Shedding Mechanism of Looms for Weaving.
I, JOHN WARD, of Ingham Street Iron Works, Blackburn, in the County of
Lancaster, Machine Maker, 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 :-
This invention relates to improvements in dobbies or shedding mechanism of
looms for weaving, and to improvements in appliances connected therewith, and
consists :-
"
Of improved combination and arrangement of parts whereby the shed is, before
each pick, closed to "half centre before being again fully opened, the healds are
always kept level and the warp threads are slackened at every pick for convenience
in weaving what are known as "lenas or "split ups."
"
According to this invention, I employ ordinary jack levers to which the healds
are attached, and one of each pair of jack levers is by a double hooked link,
connected to two cranked baulk levers, on each of which is a draw hook operated
by tumbler lever. The draw hooks and the tumbler levers are operated by one
barrel, needles being used to transfer the motion from one set of tumbler levers to
the other. The draw hooks may be worked in a vertical position, and in this case
the draw bars are worked from a horizontal rocking bar.
Such being the nature and object of my said invention, the following is a
complete description of same, reference being had to the accompanying drawings,
in which :-
Fig. 1 is a side elevation of the improved horizontal appliances for controlling
the healds or shedding mechanism of looms for weaving.
Fig. 2 is a side elevation of the improved vertical appliances for controlling the
healds or shedding mechanism of looms for weaving.
Fig. 3 is a similar view to Figs. 1 and 2, but the draw hooks are lineable with
one another.
According to this invention, and referring first to Fig. 1 of the accompanying
drawings, I employ ordinary jack levers 1. 1 to which the healds are attached by
cords 2. 2. One of each pair of jack levers 1. 1 has a short arm 3 cast to it, and
this short arm 3 is jointed at 4 to a double hooked link 5, the two hooks 6. 6
engage with two baulk levers 7. 7 pivoted at 8 on a stud or shaft fixed in the
frame of the dobby. Each baulk lever 7 is jointed at 9 to a horizontal draw
hook 10 operated by tumbler lever 11 in the ordinary manner from the pattern
barrel, needles being employed to transfer the motion from the lower tumbler
levers, to the upper draw hooks. The draw hooks 10. 10 are operated in the
ordinary manner by draw bars 12. 12, operated from the tee rocking lever 13.
In Fig. 2 the appliances illustrated are similar to the above described, but the
draw hooks 10. 10 are shewn in a vertical position, the two baulk levers 7. 7 being
in a horizontal position, and in this case the draw bars 12. 12 are operated from a
horizontal rocking lever 13. By employment of the appliances illustrated by Fig. 2,
the shedding mechanism can be brought nearer to the centre of the loom, which
in many cases is a great convenience.
7
In Fig. 2 the weight of the tumbler lever 11 moves the draw hooks 10 when no
peg occurs in the pattern barrel 14, and when a peg does occur, the nose of the
な

page_text: tumbler lever is removed from the draw hook 10, and the latter moves, through the
force of gravity, in the reverse direction; by this arrangement the tumbler levers
can be operated at any time without the use of springs, or other like devices.
In Fig. 3 only one jack lever 1 is employed, and this is pivoted at 1ª on a stud
or shaft, and the appliances are similar to those hereinbefore described, but the
draw hooks 10. 10 are lineable one with the other, one draw bar 12 operating as a
pulling bar, and the other as a push bar. The cranked baulk levers 7.7 are pivoted
at 7 7. The joints of the draw hooks, baulk levers, and jack levers, are con-
structed to secure as wide a bearing surface as possible at the part 15, the curved
portion 16 preventing backward movement, and the tongue 17 lateral movement.
The action is as follows:-When the draw hook 10 of one set of healds are
operated, the baulk levers 7. 7 engage with one side or hook of the double hooked
link 5, and so operate the jack levers and healds, and when the second set of draw
hooks 10 operate the first set partly lower the jacks and healds before the second
set of draw hooks 10 cause the cranked baulks 7. 7 to engage with the other side
of the double hooked link 5. In other words, say the upper draw hook 10 is
allowing the baulk lever 7 to move backwards, and the healds to be lowered until
such time as the other hook of the link 5 is met by the baulk lever operated by
the lower draw hook, moving in the reverse direction. By this means the shed is,
before each pick, closed to "half centre "before being again fully opened, the
healds are always kept level, and the warp threads are slackened at every pick
for convenience in weaving what are known as "lenas," or "split ups."
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.) The general construction, arrangement, and combination of parts constituting
the improved appliance for controlling the shedding motion of looms for weaving,
as and for the purpose herein described, and substantially as illustrated by Figs. 1, 2,
and 3 of the annexed drawings.
(2.) The jack levers 1. 1, double hooked link 5, cranked baulk levers 7. 7, and
draw hooks 10. 10, all in combination, as and for the purpose herein described, and
substantially as illustrated by Figs. 1, 2, and 3 of the annexed drawings.
Dated this 15th day of August 1805
JOHN WARD,
By his Agents, Brierley & Howard,
Penny Bank Chambers, Halifax.