Improvements in Dobbies and Heald Operating Mechanism used in connection with Looms for Weaving.
Year: 1894

page_text: Date of Application, 2nd June, 1894
Complete Specification Left, 4th Mar., 1895-Accepted, 6th Apr., 1895
PROVISIONAL SPECIFICATION.
Improvements in Dobbies and Heald Operating Mechanism used in
connection with Looms for Weaving.
We JAMES HILL of 35 Ethel Street Keighley in the County of York Machine
Maker and EDWARD HILL of the same place Machine Maker do hereby declare
the nature of this invention to be as follows:-
It relates firstly to improvements in heald operating mechanism of the class
known as Non Positive Dobbys and consists of arranging and constructing the
parts forming said mechanism in such a manner that the tilting of the healds is
avoided and a perfect parallel lift obtained.
The second part of our invention relates to undermotions for looms and consists
of constructing and arranging the parts forming said motion in such a manner that
its action is made more perfect and at the same time only one spring is required
for every two healds instead of one spring to each heald as heretofore.
The first part of our invention is attained by extending the framework of the
mechanism so that when fixed in position on the loom the said framework extends
over the centre of loom.
In suitable positions in the extended parts of frames we arrange two holes and
in these holes two shafts are fixed, said shafts extending across from one frame
to the other. Upon each of the said shafts we mount heald levers, said levers
having openings in them for this purpose while over said openings are formed radius
holes through which pass guard pins.
The guard pins pass through the framework and being suitably fastened thereto
prevent the said heald levers from getting off the shafts upon which they are
mounted. By taking away the guard pins any lever can be removed and replaced
without disturbing any of the others.
The levers, which are fulcrumed on the shaft nearest the machine, are formed at
one side of their centre's with rounded ends which project towards the shaft upon
which the other heald levers are fulcrumed. In the other ends are formed holes
through which the heald cords are passed and secured.
The heald levers which are mounted upon the other shaft are formed with forked
ends at one side of the centre while at their other ends holes are formed for the
heald cords to be attached.
The heald levers with the forked ends have arms projecting at right angles over
their centre's and upon these arms are cast pins.
We make use of suitably shaped bell crank levers, in dobby, each having a pin
cast upon them, in a suitable position near the top, by which they are coupled up
to the vertical arıns of the levers, which are mounted on the shaft in extended
frame, by suitable connecting rods which hook onto the pins on said bell crank and
heald levers.
When the heald levers are placed on the shafts they extend horizontally and
their outer ends pass through and are held in position by grates which are suitably
fixed to the framework for this purpose.
The rounded ends of the heald levers fit into the forked part of the other heald
levers, so that when any of the bell crank levers are drawn forward, they also
draw forward the vertical arms of the heald levers to which they are coupled and
in so doing the forked ends of said levers are depressed while the ends to which

page_text: the heald cords are attached, are raised. The heald levers having the rounded
ends fit into the forked ends of the other heald levers and with the said levers
being fulcrumed on separate shafts, when the forked ends of levers are depressed
they also cause the rounded ends of the opposite levers to be depressed and by
these means the ends on the opposite side of the centre to the rounded ends, and to
which are secured the heald'cords, are raised exactly the same height, and in the
same radius, as the heald levers on the opposite shaft and the outer ends of each
of the said levers being coupled to one heald a perfect parallel lift in the healds is
obtained, and the tilting of the healds avoided.
The second part of our invention relates to a motion for pulling down the healds
after they have been lifted by the dobby.
This we attain by mounting two shafts-in-suitable frames and upon these shafts
we place levers similar to the beald levers we use in connection with the dobby,
they the said levers having openings for the shafts and radius holes for the guard
pins said guard pins being used to keep the said levers in position and so arranged
that any one lever can be taken out or replaced without disturbing the rest.
levers on one shaft are arranged with forked ends, while the levers on the other
shaft have rounded ends which fit into the forked ends of the before named
levers.
The
The outer ends of the levers on each shaft pass through grates, the said grates
being suitably fastened to the framework and so arranged as to keep the said levers
in position.
Every other lever on each shaft is arranged with an arm upon its underside, said
arms each being formed with a hook upon them, so that springs can be hooked
from the arm of the lever upon one shaft to the arm of the lever upon the other
shaft, that is, if the spring is hooked to the arm of the first lever upon one shaft
it would have to be hooked to the arm of the second lever on the other shaft, the
first lever not having any arm upon it to which the spring could be hooked. The
first two levers are coupled up to one heald and so forth through the whole series.
The forked and rounded ends of the heald levers coupling and working together
and the outer ends of each of these levers being coupled to one heald, after the
heald has been lifted, by the dobby and the shuttle passed through the shed, the
dobby goes back to its original position and the heald is pulled down by the spring
which is coupled to the arm of its lever.
Again by only having one arm on every other lever, on both shafts, we use
only one spring to pull down two healds, for instance for sixteen healds we only
require eight springs. If it is a strong cloth that is being woven and it requires
more spring, we can arrange the arms with two or more hooks each, so that if
required extra springs can be hooked onto the same arms directly under the other
spring.
Dated this 1st day of June 1894,
JAMES HILL.
EDWARD HILL.
Improvements in Dobbies and Heald Operating Mechanism used in
connection with Looms for Weaving.
We JAMES HILL of 35 Ethel Street Keighley in the County of York, Machine
'Maker, and EDWARD HILL of the same place 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 :-
It relates firstly to heald operating mechanism of the class known as Non Positive
Dobbys, and consists of arranging and constructing the parts forming said
-

page_text: Fig. 4 is a
Figs. 5, 6, 7 and 8 are views in detail of levers used in our improved under-
notion.
The first part of our invention we attain by extending the framework a of dobby
so that when fixed in position on the loom, the said framework extends over the
centre of said loom.
In suitable positions in the extended part of the said frames a, are arranged
holes, and in these holes, shafts b and c are fixed, said shafts and c extending
Upon the shafts b and c we mount
across the dobby from one frame to the other.
heald levers d and e having openings d¹ and e¹ in them for this purpose, while at
suitable distances from these openings d' and e¹ are formed radius holes d and e²
through which pass guard pins f and f¹ they, the said guard pins f and f¹ pass
through the framework a and being suitably fastened thereto prevent the levers d
and e from getting off the shafts and c upon which they are mounted. By
taking away the guard pins and f¹ the levers d and e can be readily removed or
replaced.
The heald lever d is made at one end with a rounded part d³ while in the
opposite end are formed holes d so that the heald cords may be readily attached.
The heald lever e is arranged with a forked end e at one side of its centre while
in the opposite end are arranged holes et so that the heald cords may be attached.
Over the centre of the lever e is formed an arme having its outer end cored so
as to leave a pin by which it is coupled by a suitable rod to the dobby lever h¹.
The levers d and e pass through the grates k and k¹ respectively and are thereby
held in position, they, the said levers d and e are also held in position in the
centre by suitable side binders k² and set screw k³.
The levers d and are so arranged that when placed on the shafts b and c the
rounded end d³ of the lever d fits into the forked end e of the lever e, so that
when the dobby lever h¹ is drawn forward, it draws up the lever e by reason of the
arme of the said levere being coupled by the connecting rod to the dobby
lever hand by reason of the rounded end d³ of the lever d fitting into the forked
end of the lever e and both the said levers d and e being fulcrumed on the
shafts b and c respectively, the outer end of the lever e is lifted and the forked
end is depressed, as is also the rounded end d³ of the lever d and by these
means the outer end of the lever d is raised at the same time as the outer end
of the lever e therefore a parallel lift is obtained and any tendency to tilt
avoided.
The second part of our invention relates to a motion for pulling down the
healds after they have been raised by the dobby. This we attain by mounting
two shafts m and m¹ in suitable framework n and extending across the motion.
Upon the shaft m and m' we mount levers p and p' and r and r¹. The levers r
and pl
aud 7 on the shaft m are arranged with forked ends 2 while the levers p
are arranged with rounded ends p² which fit into the forked ends of the
levers and r¹. We also make use of guard pins s and s¹ to keep the levers p
and p¹ and and r¹ on their respective shafts m and m³, while by removing the
said guard pins & and s¹ the levers p and p¹ and r and r¹ may be readily removed
or replaced.

page_text: The levers pl and are arranged with tail pieces underneath, while the levers p
and are made without. Upon the tail pieces are formed hooks. The outer
ends of the' lévers' and p and r and p pass through grates n' and n' they the
said grates keeping the levers in position, while they the said levers are also kept
up to the pitch on shafts m and m by side binders m² and set screws m³..
1
The levers p and pl and r and are so arranged in the motion that the rounded
end p² of the lever p fits into the forked end of the lever, while the rounded
end p of the lever p' fits into the forked end of the lever 7. We attach a
spring w to the hooks on levers r and p respectively and by these means, when the
levers P and are drawn up,
the spring pulls them down to their original position
by reason of the rounded end p2 of the lever p fitting into the forked end of
the lever r. If the levers p² and are lifted they also will be pulled down to
their original position, again if the levers p and " and p' and be all lifted, they
will be all drawn back to their original position by the spring w and by these
means we can pull down two healds with one spring. If required for a heavy
weave two springs can be hooked to the levers p' and r.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what
we claim is :-
1. The extended frame a the shafts b and c the levers d and e the connecting
rod h the dobby lever ', the guard pins f, and f1 and the grates and kin
combination, the same being formed and arranged in the manner and for the
purpose as herein described.
2: The heald lever d having the opening d¹ the radius hole d² the rounded
end d³ the holes d' and the heald lever e having the opening e' the radius hole e*
the forked end the holes e and the arm e, all constructed in the manner as
shown and illustrated by the accompanying drawings.
5.
3. The framework n the shafts m and m' the levers p and p¹ and and r¹ the
spring w the guard pins s and s' and the grates n' and n in combination, the same
being formed constructed and arranged in the manner and for the purpose as
described and illustrated by the accompanying drawings.
4. The lever p having the rounded end p the lever having the forked end²
and the tail piece with hooks the lever pl having the rounded end p² and tail
piece with hooks and the lever r having the forked end 2 in combination the
same being formed and constructed in the manner and for the purpose as set
forth.
Dated this 1st day of March 1895
JAMES HILL.
EDWARD HILL.