Improvements in Heald Machines or Shedding Mechanism of Weaving Looms.
Year: 1893

page_text: Date of Application, 4th July, 1893
Complete Specification Left, 4th Apr., 1894-Accepted, 12th May, 1894
PROVISIONAL SPECIFICATION.
Improvements in Heald Machines or Shedding Mechanism of
Weaving Looms.
I, WILLIAM DEIGHTON, of 74, Laisterdyke, near Bradford, in the County
of York, Mechanic, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in that type of heald machines or
shedding mechanism of weaving looms in which the healds are each connected to a
vertical guide attached to a hook and these hooks are brought into position by
cards or their equivalent to engage a rising and falling lever as the nature of the
pattern requires the several healds to be raised and lowered. A lower rising and
falling lever has also been employed (working in unison with the upper lever) to
lower the healds not lifted by the upper lever and thereby lower such of the warp
threads as the weft requires to pass over-to form the pattern or design-at the
same time as the upper lever raises those warp threads that the weft passes under.
But this lower lever has not been very largely used principally because it was
found that occasionally it lowered the said hooks before the upper lever had
sufficient time to engage such of the hooks that the nature of the pattern required
to be lifted. And the object of this invention is to remedy this defect.
lever
For this purpose I employ a tappet or cam to raise the lower lever and this
tappet is formed with a "dwell" upon its acting face so arranged that when the
lower lever is raised it remains stationary at its highest point until the upper
has had ample time to engage and commence to lift such of the said hooks as the
nature of the pattern requires.
The said tappet may be mounted upon a rocking shaft operated in any
convenient manner. And the lower lever preferably carries an anti-friction roller
to engage the tappet.
Dated this 2nd de' of Tule 1802
DRACUP & NOWELL,
Bradford, Agents.
COMPLETE SPECIFICATION.
Improvements in Heald Machines or Shedding Mechanism of
Weaving Looms.
I, WILLIAM DEIGHTON, of 74, Laisterdyke, near Bradford, in the County of
York, Mechanic, 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 that type of heald machines or
shedding mechanism of weaving looms in which the healds are each connected to
a vertical guide attached to a hook and these hooks are brought into position by
cards or their equivalent to engage a rising and falling lever as the nature of the
pattern requires the several healds to be raised or lowered. A lower rising and
falling lever has also been employed (working in unison with the upper lever) to
lower the healds not lifted by the upper lever and thereby lower such of the warp
threads as the weft requires to pass over-to form the pattern or design-at the
LD071

page_text: same time as the upper lever raises those warp threads that the weft passes under.
But this lower lever has not been very largely used principally because it was found
that occasionally it lowered the said hooks before the upper lever had sufficient
time to engage such of the hooks as the nature of the pattern required to be lifted.
And the object of this invention is to remedy this defect.
For this purpose I employ a tappet or cam to raise the lower lever and this
tappet is formed with a "dwell" upon its acting face so arranged that when the
lower lever is raised it remains stationary at its highest point until the upper lever
has had ample time to engage and commence to lift such of the said hooks as the
nature of the pattern requires.
Reference is to be had to the accompanying sheet of drawings forming a part of
this Specification in which similar letters of reference indicate corresponding parts
in each of the figures.
Figure 1, represents a back view of a heald machine with my improvements
applied thereto.
Figure 2, is a plan view of the same.
Figure 3, represents a view looking towards the left hand side of Figure 1.
Figure 4, represents a separate view of the herein mentioned tappet on a larger
scale in which the operating arm is shown broken away.
As usual in this machine the lever A is pivoted by the link B to the bracket C
projecting from the frame-work D of the machine and said lever is raised and
lowered by the lever E coupled to it by the rod F. The lever E is shown broken
away in the drawings but it is operated in the ordinary way by a rod connecting it
to a crank upon the crank shaft of the loom. The card "cylinder" H is also of
usual type and is operated from the lever E, and the "needles" J are arranged to
The hooks or
be moved horizontally by the cards thereon in the usual manner.
"uprights" J pass through the eyes J in the needles and are hooked below to
the pendent pieces K to which the heald bands are attached as usual.
The pendent pieces K are passed through holes L in the lower lever M and the
latter is pivoted by a link B¹ to the bracket C' in a similar manner to the upper
lever A. The lever M is supported at the back upon the tappet N and is lowered
(whilst the upper lever is being lifted) by the movement of said tappet. The
tappet is mounted on the stud 0 projecting from the framework and is provided
with an arm P coupled by the rod Q to the arm R on the operating lever E so that
each movement of the lever E vibrates the tappet upon its stud and allows the
anti-friction roller S, mounted at the end of the lever M and resting upon the
tappet, to pass from the position shown in the drawings to the position represented
by the broken lines Figure 4 and thus lowers the lever M. The reverse movement
of the tappet of course raises said lever again. To prevent the lever M being
lowered before the hooks that require lifting have engaged the upper lever A the
tappet is made with a portion n formed concentric with the stud upon which caid
tappet is mounted so that the lever M does not begin to lower before the anti-friction
roller has passed off the portion n.
The rollers U, U mounted upon the lever M are provided to bear against the
outer sides of the framework and keep the said lever from moving horizontally.
It is obvious that the position of the tappet N and anti-friction roller S may
be reversed that is to say, the tappet face may be formed on the end of the
lever M and the roller mounted upon the vibrating arm P but I prefer the
arrangement shown.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is :
1. In a heald machine, an arrangement whereby the hooks which do not
require to be lifted are lowered after the other hooks have begun to be lifted,
substantially as herein shown and described and illustrated in the accompanying
drawings.

page_text: 2. In a heald machine, the combination with a lever for lowering the hooks, of
an anti-friction roller arranged to bear upon a tappet or the like, substantially as
herein shown and described.
"
DRACUP & NOWELL,
Bradford, Agents.