Improvements in the Mechanism for Operating the Healds of Looms for Weaving.
Year: 1889

page_text: Date of Application, 24th Sept., 1889
Complete Specification Left, 23rd June, 1890-Accepted, 26th July, 1890
PROVISIONAL SPECIFICATION.
Improvements in the Mechanism for Operating the Healds of Looms
for Weaving.
1. MILES SOWDEN, of Sowdens Loom Works, Shipley, in the County of York.
Loom Maker, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in dobbies, or mechanism for operating the
healds in looms for weaving, and consists of an improved construction, and arrange-
ment of parts, whereby sufficient movement is given to the jack levers to open the
"shed the required distance, with a comparatively shorter movement, or traverse of
the draw hooks and bars and also to so construct and arrange the parts that less power
is required to operate the jack levers, and healds, than heretofore; and to improved
baulk stays or
** fulcrum bars" which are so constructed as to vary the position of
the several draw hooks in relation to the beam bars so as to ensure the several hooks
and connections having such variation in the degree of movement as to ensure a
corresponding effect on the shed whereby the latter is regularly and evenly
throughout.
According to this my said invention construct the bulk levers curved or recessed
at their lower ends, and the jack levers are attached to the same in the ordinary way,
that is, by a stud or pin fixed about midway the length of the said levers, or between
the ends to which the upper and lower draw hooks are secured; the cross shaft which
forms the fulcrum of the jack levers, and which has heretofore been below the bottom
joint of the latter, such shaft I am enabled to place above the joints of the draw hooks
by reason of the recessed or curved formation of the baulk levers, and it will be obvious
that as the fulcrum of the jack levers is thus nearer to the joint or connection between
the jack levers and baulk levers, less power is required to operate the jack levers, and
also less movement of the draw bars and hooks is requisite to secure the opening
the shed the requisite distance.
::
The improved baulk" stays or fulcrum bars" which also form a fulcrum for
the upper, or lower draw hooks, I step or recesses in varying depths there being
one of such steps or recesses for each of the draw hooks, by this construction of
ar the draw hooks which are of equal length assume practically different lengths
in relation to the draw bars, and each draw hook is successively operated by the
draw bar the variation of length is determined by varying the depths of the
recesses or steps which also serves to steady the baulk levers and draw-hooks
lateraly acting in a similar manner to grates.
Dated this 23rd day of September 1889.
WALIER BRIERLEY.
Central Chambers, Halifax, Agent for the Applicant.
Improvements in the Mechanism for Operating the Healds of Looms
for Weaving.
I, MILES SOWDEN, of Sowden's Loom Works, Shipley, in the County of York,
Loom 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 mechanism for operating
the healds in looms for weaving, and consists of an improved construction, and
arrangement of parts, whereby sufficient movement is given to the jack levers to

page_text: **
open the shed" the required distance with a less, or reduced angular movement
of the baulk levers, and also to so construct, and arrange the parts that less power
is required to operate the jack levers; and healds than heretofore; and to improved
baulk"
stays," or fulcrum bars which are so constructed as to vary the position
of the several draw hooks in relation to the draw bars; so as to ensure the several
hooks, and connections having such variation in the degree of movement as to ensure
a corresponding effect on the shed whereby the latter is made regular, and even
throughout.
Such being the nature, and object of my said invention the following is a complete
ilescription of same, reference being made to the accompanying drawings in
which
Fig. 1 is a side elevation of one of my improved baulk levers with draw hooks,
and jack levers attached thereto.
Fig. 2 is a plan view of a part of a dobby having my improvements applied
thereto.
Fig. 3 is a side elevation of Fig. 2 but shewing the several parts in different
positions.
Fig. 4 is a plan view of my improved baulk stay; and
Fig. 5 is a plan view of draw knife, or har.
According to this my said invention I construct the baulk levers 1 (see Fig. 1.)
curved or recessed at their lower ends 2, and the jack levers 3 are attached to the
same in the ordinary way, by stud, or pin 4 fixed about midway the length of the
said levers 1, or between the ends to which the upper, and lower draw hooks 5. 6 ara
attached the cross shaft 7 which forms the fulcrum of the jack levers 3, and which
has heretofore been below the bottom joint 6 of the latter, such shaft 7 I am enabled
to place above the joints of the draw hooks 6 by reason of the recessed, or curved
formation 2 of the baulk levers 1. and it will he obvious that as the fulcrum 7 of the
jack levers 3, is thus nearer to the joint, or connection 4 between the jack levers 3.
and baulk levers 1 less movement of the draw bars, or knives S, and hooks 5. G is
requisite to secure the opening of the "shed the requisite distance, and the jack
levers can be made much shorter, and lighter than heretofore, thereby effecting a
great saving in material, and wear and tear of the several parts.
The improved baulk stays or fulcrum bars 9 which form a fulcrum either for the
upper, or lower draw hooks 5. 6. I step, or recess as at 10. 10 (see sheet 2 Fig. 4)
in varying depths there being one of such steps, or recesses 10 for each of the joints
of the draw hooks 5. 6 and baulk levers 1. By this construction of bar 9 the draw
hooks 5. 6 which are of equal length assume practically different lengths to suit the
movement of the draw bars or knives S and each draw hook 5. 6 is operated by one of
the draw bars, or knives 8 which have a longer traverse, or movement at one end,
than at the other by reason of the adjustable joints or link studs 19 being set
differently on the arm 14 (nearer to or further from the rocking shaft 18 of the
arm 14.) and when operated by the T. or rocking lever 15 the end connected to the
link stud 19 will move further than the other end connected to the link stud 20 so
as to draw, when requisite. several draw hooks 5. 6 at the same time, and so as to
move to a parallel position with the recesses in the baulk stays, the variation of the
relative length of draw hook 5.6 is determined by varying the depths of the recesses.
or steps 10 which also serve to steady the baulk levers I and draw hooks 5, 6 latterally,
acting in a similar manner to grates, and the links or adjustable joint studs 19. 20 are
to make the draw bars of knives & correspond with the depth of such recesses,
or to the incline of the baulk stays 9 when the latter are inclined, or set at an angle,
not being a right angle, to the frame 15 of the dobby, or shedding mechanism as
shewn in Fig. 2. the inclined face of the baulk stays 9 being the equivalent of the
recessed baulk stays 9-thus the requisite variation in the position of the jack
levers 3 is obtained..
set
ני
On the face of the draw bars, or knives S I place anti friction bowls, or
runners 16. 16 which serve to guide, and steady the draw bars or knives & when

page_text: being moved to, and fro, the joints 12. 13 being made double so as to allow of free
movement of the said bars, or knives, and prevent locking" or binding."
"
44
::
In some cases I form, or cut recesses, or saw gates 17. 17 in the edge of the
draw bars, or knives 8 (see Fig. 5) that when engaging with the draw hooks 5. 6 the
latter are prevented moving laterally, but are held and drawn in a true line.
Having now particularly described, and ascertained the nature, and object of my
said invention, and in what manner the same is to be performed I declare that
what I claim is :-
1. Baulk levers as, and for the purpose herein described and substantially as
illustrated by Fig. 1 of the annexed drawings.
2. In shedding mechanism the combination therewith of inclined, or recessed baulk
stays 9 and inclined draw bars or knives S, with or without the notches, or saw
gates 17, 17, the anti-friction bowls or runners 16. 16 and double joinis 12. 13 all in
combination as and for the purpose herein fully described and substantially as
illustrated by sheet 2 of the accompanying drawings.
Dated the 21st day of June 1890.
MILES SOWDEN.
By his Agent, Walter Brierley,
Central Chambers, Halifax.