AN IMPROVED SHEDDING MOTION FOR LOOMS
Year: 1885

page_text: We, DAVID BAILEY of Plymouth Grove, Pellon Lane, Halifax Yorkshire, Loom
Tuner and SQUIRE STEAD of Horne Street, Pellon Lane, Halifax Yorkshire, Loom
Tuner do hereby declare the nature of our invention for "AN IMPROVED SHEDDING
MOTION FOR LOOMS" to be as follows:-
Our invention has reference to improved construction and arrangement of
mechanism for opening and closing the shed in a positive and reliable manner.
To effect this object according to our invention we employ a toothed barrel to
which we give an intermittent rotary motion by means of space wheels or other
means. At a point above the toothed barrel and in gear therewith we employ a
number of pinion wheels (one for each heald) to which we connect eccentrically
one end of an arm, the other end thereof being connected to ordinary bell crauk
levers for operating the healds.
These pinion wheels are carried by and connected to one end of a lever, which
lever is raised by peg lags, or other pattern surface and caused to descend by
their own weight or assisted by springs, the said peg lags determining which of
the pinion wheels shall be in gear with the barrel, the arrangement being such that
when the pinion wheels are in gear, the healds will be operated when the barrel
revolves, and when the pinion wheels are not in gear but disengaged by the pegging
mechanism the healds remain stationary.
When therefore any of the healds require either lifting or lowering, intermittent
rotary motion is given to the barrel, and such of those pinion wheels as are in gear
with the barrel will be rotated one half of a revolution, and the healds operated
thereby, but those pinion wheels which are disengaged from the barrel will be
held rigid and immoveable by a locking bar, which enters the teeth of the pinion
wheels before they have left the toothed barrel, the said bar being so regulated in
its upward and downward movement that the said pinion wheels are at no time
loose or free to move accidentally, or by the pull of the healds in consequence of
the pinion wheels being always locked either by the toothed barrel or by the
locking bar.
The pinion wheels have a rotary and not an oscillatory motion, and they aro
caused to rotate one half of a revolution for each movement of the healds.
Dated this 10th dose of Ontahan 100%
TASKER & CROSSLEY,
Agents for the Applicants.

page_text: We, DAVID BAILEY, of Plymouth Grove Pellon Lane, Halifax, Yorkshire, Loom
Tuner, and SQUIRE STEAD of Horne Street, Pellon Lane, Halifax Yorkshire, Loom
Tuner do hereby declare the nature of our invention for "AN IMPROVED SHEDDING
MOTION FOR LOOMS" and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
Our invention has reference to an improved construction and arrangement of
mechanism for opening and closing the "shed" of looms in a positive and reliable
manner.
To effect this object according to our invention we employ a toothed barrel to
which we give an intermittent rotary motion by means of space wheels or other
means.
At a point above the toothed barrel and in gear therewith we employ a number
of pinion wheels (one for each heald) to which we connect eccentrically one end of
an arm, the other end thereof being connected to ordinary bell crank levers for
operating the healds.
These pinion wheels are carried by and connected to one end of a lever, which
lever is operated in one direction by its own weight or assisted by springs, and in
the other direction by a locking bar. Peg lags or other pattern surface is employed
to determine which of the pinion wheels shall be in gear with the barrel, the
arrangement being such that when the pinion wheels are in gear the healds will be
operated when the barrel revolves, and when the pinion wheels are not in gear but
disengaged by the pegging mechanism, the healds remain stationary.
When therefore any of the healds require either lifting or lowering, intermittent
rotary motion is given to the barrel, and such of those pinion wheels as are in gear
with the barrel will be rotated one half of a revolution, and the healds operated
thereby, but those pinion wheels which are disengaged from the barrel will be held
rigid and immoveable by a locking bar, which enters the teeth of the pinion wheels
before they have left the toothed barrel, the said bar being so regulated in its
upward and downward movement, that the said pinion wheels are at no time loose
or free to move accidentally, or by the pull of the healds in consequence of the
pinion wheels being always locked either by the toothed barrel or by the
locking bar.
The pinion wheels have a rotary and not an oscillatory motion, and they are
caused to rotate one half of a revolution for each movement of the healds.
Such being the nature and object of our Invention, we will now proceed to
describe the same more fully, and for that purpose make reference to the accom-
panying sheets of drawings which illustrate our improvements. Fig. 1 is front
elevation of a dobby or apparatus for opening and closing the "shed in looms for
weaving, Fig. 2 is plan view of same, and Fig. 3 (sheet 2) is end view thereof.
"
A represents the framework of the apparatus, and B a horizontal shaft which is
caused to revolve continuously from any convenient rotary part of the loom to
which the dobby is applied, C is a toothed barrel caused to revolve intermittently
by space bevel wheel D on the main shaft B, and by space bevel wheel E fixed on

page_text: the end of the said toothed barrel. F are pinion wheels corresponding in number to
the healds, which pinions are each connected to and carried by the lever G hinged
at H and working through the grate a so as to keep the levers clearly apart from
each other.
b
These pinions at a given time are all caused to descend and to be in gear with
the barrel C which is effected by the descent of the locking bar operated as herein-
after described, but the pinions are lifted out of gear with the barrel when at
liberty by the spiral springs 6 forcing the pins e down upon the opposite ends of
the lever G, whilst the pinions intended to be operated are held firmly into gear
with the barrel during the time they are being operated by the pegs c on the
pegging barrel I which holds or props up the rear ends of the lever G.
The pegging barrel I is rotated intermittently by star wheel K which is actuated
at every revolution of the shaft B by horizontal pin or finger d projecting from
the boss L fixed on the said shaft. As stated above the pinion wheels F are
connected to and carried by the levers G, but on one side of the said pinion wheels
are also connected one end of an arm M_placed horizontally, and which receives
the upper end of a bell crank lever N. To this lever the healds are attached by
cords, straps, or chains in the ordinary manner as is well understood. P is a
locking bar running the whole width of the toothed barrel C, such locking bar
being carried by the bell-crank lever R, and operated up and down at the proper
time by cam acting upon a small pulley at the bottom of the bell crank lever R,
such cam S receiving a rotary motion from the shaft B to which it is attached.
The modus operandi is as follows;
-
shall be
The locking bar P descends and places all the pinions in gear with the cylinder C
as shewn in Fig. 6, but the pegging barrel I determines which "shed
opened and closed, and the pegs c thereon are therefore arranged accordingley before
commencing to weave. Therefore when the "shed" has to be operated the pegs c
come under the levers G, and hold or prop up the rear ends thereof, whilst the
opposite ends and pinions F are in gear with the toothed barrel C.
The locking bar P then begins to ascend, and as soon as the pressure is removed
off those pinions not kept down by the pegging. barrel, or as soon as the pinions
are at liberty the springs b which are always ready for acting, force the pins e
down upon the rear ends of the levers G, and those pinions not kept in gear with
the pegging barrel C by the pegging cylinder, follow up with the locking bar P as
seen in Fig. 5, consequently at the next movement of the barrel the arms M con-
nected to those pinions in gear with the barrel C would be carried around one half
of a revolution as shewn in Fig. 4, and if the pegging barrel made no change in
the position of the lever G, the same pinions would again be operated one half
revolution at the next movement of the barrel C operated by the space wheels D
and E, and this would go on until the pegging barrel determined otherwise, but
when the pegs c are absent then the rear ends of the levers G would be at liberty,
consequently the spiral springs b would force the pin e down upon the levers G, the
effect of which would be that the opposite end of the said levers would be raised
at the proper time in such manner as to lift the pinions out of gear with the
toothed barrel (as seen in Fig. 5) consequently those pinions would be stationary
at the next movement of the barrel, and would remain stationary until the levers G
were propped up again by the pegging barrel.
We will now describe the object and utility of the locking bar P, which com-
prises one of the characteristic features to the success of our improved apparatus.
The action of this bar is as follows;
When the pinions F are out of gear with the toothed barrel C as shewn in Fig. 3,
they are in contact with the locking bar P, and prevented from rotating thereby,
but with the next downward movement of the locking bar which is effected at the
proper time by the cam S all the pinions are placed in gear with the barrel C as
seen in Figure 6.
33
The pegging cylinder I is now operated and if certain “sheds are to be opened
the pegs c which are arranged accordingley on the pegging cylinder come under

page_text: the levers Grand remain there. The locking bar now ascends, and with it those
pinions not held down by the pegging barrel, and when the pinions are clear from
the barrel, the said barrel rotates carrying the pinion with it as previously
explained, it must however be understood that the pinions are always in gear
either with the locking bar or with the barrel, and sometimes in gear with both
consequently the pinions are always locked and it would be impossible for the pull
of the healds to operate them accidentally.
Having now particularly described and ascertained the nature of our said
Invention, and in what manner the same is to be performed, we declare that what
we claim as our Invention is,
In a "shedding" motion of looms for weaving, the combination of the pegging
barrel or other pattern surface I toothed barrel O, pinion wheels F, and locking
bar P, operated substantially in the manner described and shewn in the Drawings.