Year: 1896

page_text: We JAMES HILL of Cavendish Works Keighley in the County of York Machine
Maker and EDWARD HILL of the same address Machine Maker do hereby declare the
nature of this invention to be as follows:-
Our invention relates to dobby mechanism for operating the healds of looms and
consists of means whereby, when long patterns or designs are to be woven, the
number of lags and pegs or pattern surface required for their production are greatly
reduced.
In carrying into effect our invention we use the heald levers, baulks, draw hooks
and draw bars in the usual manner. We make use of two pattern cylinders which
we mount upon swing levers, they the said swing levers, being mounted or fulcrumned
upon a shaft passing through the framework of dobby. We also make use of two
setts of feelers or indicating levers, the inner sett coming over one pattern cylinder
and indicating upon the drawhooks in the usual manner, while the outer sett come
over the second pattern cylinder and, are so arranged that they may indicate upon
the first or inner sett of feelers or indicating levers and thus indirectly indicating
upon the draw hooks. We pass a suitable shaft through the framework of dobby,
said shaft extending parallel, but at a suitable distance from the outer extremities of
the bottom draw hooks.
Upon this shaft we mount a catch wheel which when placed in position comes
lineable with the bottom drawhook at the back of dobby, & upon this drawhook we
mount a finger which projects over the end of said draw hook.
When this drawhook is lowered so as to come into contact with, and drawn forward
by, the draw bar, the finger mounted on the said draw hook engages with and turns
the catch wheel one tooth, and by reason of the catch wheel being fixed to the shaft,
the said shaft is also turned. To this shaft, and towards the front of dobby, we fix
a chain wheel over which we pass a suitable chain and upon the driving shaft of
dobby we mount a lever which projects over and rests upon the boss of the chain
wheel. If desired a lug may be formed upon said lever and a pulley mounted
thereon, in this case the pulley would rest upon the boss of chain wheel.
The lever which is mounted upon the driving shaft is cranked, towards its outer
end, so that it comes directly over the swing lever, which carries the pattern
cylinders on the front of dobby. The inside end of this swing lever we allow to
project beyond the inner pattern cylinder, and this end we couple, by suitable
connecting rod to the lever mounted upon driving shaft.

page_text: We make use of a suitable cam which we nount upon one of the links in chain,
so that when this cam is moved into contact with the lever mounted upon driving
shaft, said lever is lifted thereby, and by reason of the inner end of the swing lever,
upon which the pattern cylinders are mounted, being coupled up to the said lever,
this the inner end of the said swing lever is lifted causing the inner pattern cylinder
to be lifted into contact with the inner feelers or indicating levers, while at the
same time the outer pattern cylinder will be lowered out of contact with the outer
feelers or indicating levers. When the cam passes from under the before named
lever we make use of a suitable spring which depresses the inside end of the swing
lever causing the outer end to be raised and by these means the inner pattern
cylinder is lowered out of contact with its series of feelers or indicating levers while
the outer pattern cylinder is raised into contact with the outer feelers or indicating
levers.
To lock the outer pattern cylinder when it has been sprung into position, we extend
the lever, mounted upon the driving shaft, past the pin by which it is coupled up to
the swing lever, and upon this extended part we form a lug, or pin.
We place a shaft in a suitable position extending over the top draw hooks and
upon this shaft we mount two levers, one being fixed to the shaft at the front of dobby
and the other towards the back.
The lever at the front of dobby we make sufficiently heavy, that it falls with its own
weight, and we arrange upon said lever a hook in such a manner that when the lever
falls into position, said hook comes over the lug or pin formed upon extended part
of lever mounted upon driving shaft, and by these means holds the outer pattern
cylinder into contact with the outer feelers or indicating levers.
The other lever is also fixed to the shaft passing over the top draw hooks and hangs
down in front of the baulk to which the back bottom draw book is attached, and to
this lever we binge another lever having a hook formed upon it which comes in front
of a pin placed in heald lever of dobby, and a tail piece which rests upon a binding
screw in dobby, in such a manner that when the baulk is drawn forward by the
bottom draw hook, the pin in heald lever presses against the hook formed on the lever
hinged to the lever, fixed to the shaft passing over the top draw hooks, and by these
means the lever fixed to the said shaft at the front of dobby, is moved off the lug or
pin formed upon the lever mounted upon the driving shaft, so that when the tail
piece attached to the bottom draw hook turns the catch wheel and the cam, attached
to the link of chain, presented to the lever fulcrumed upon the driving shaft of dobby,
the inside pattern cylinder may be lifted into contact with the inside feelers or indicating
levers.
We mount a catch wheel upon the shafts of each of the pattern cylinders in the
usual manner and we also make use of two push catches which we fulcrum upon studs
fixed to the driving lever of dobby, said push catches being arranged so as to engage
with the catch wheels mounted upon the shafts of pattern cylinders.
By means of a stand fixed to the framework of dobby the push catches are only
allowed to engage with the catch wheels, when the pattern cylinders are raised into
contact with the feelers or indicating levers.
When the pattern cylinders are lowered out of contact with said feelers or indicating
levers, the push catches ride upon the stand fixed to framework of dobby and are thus
prevented from turning the pattern cylinder through the medium of the catch
wheel.
By pegging the pattern surface so as to indicate upon, and cause, the bottom draw
hook at the back of dobby to engage with the draw bar, thereby turning the catch
wheel and chain wheel and by attaching too, or leaving off, the cam from chain, we
can put into or out of contact either of the pattern cylinders at will.

page_text: COMPLETE SPECIFICATION.
Improvements in Heald Operating Mechanism of Looms for
Weaving.
We JAMES HILL of Cavendish Works, Keighley in the County of York Machine
Maker and EDWARD HILL of the same address 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 :-
Our invention relates to dobby mechanism for operating the healds of looms and
consists of means whereby, when long patterns or designs are to be woven, the
number of lags & pegs or pattern surface required for their production are greatly
reduced.
In the accompanying sheets of drawings Fig. 1 is a side elevation of a dobby with
our improved mechanism attached.
Fig. 2 is a sectional view showing arrangement of feeler or indicating lever catch
wheel back bottom drawhook & baulk & heald lever.
Fig. 3 is a view in detail showing part of arrangement for locking outer cylinder
when in contact with its series of feelers or indicating lever.
Figs. 4 & 5 are views in detail showing detachable chain with cam, and Fig. 6
is a detail view showing back bottom drawhook with finger mounted thereon.
In carrying out our invention we use the heald levers a, baulk b, draw hooks c, c'
and draw bar d, d¹ in the usual manner. We make use of two pattern cylinders e & f
which we mount upon the swing lever g said lever being placed on each side of dobby
and fulcrumed upon the shaft g' said shaft passing through holes formed in the
dobby framework. We also make use of two setts of feelers or indicating levers,
the inner feeler or indicating lever coming over the pattern cylinder f and
indicating upon the drawhooks c, c¹ in the usual manner, while the outer feelers
or indicating lever h¹ come over the pattern cylinder e and are so arranged that they
indicate upon the inner feelers or indicating levers h and thus indirectly indicate
upon the draw hooks c, c'.
We pass a shaft k, through framework of dobby, extending parallel, and at a
suitable distance from, the outer extremities of the bottom drawhooks c. Upon the
shaft we mount a catch wheel k¹, which when placed in position, comes lineable
with the bottom drawhook c at the back of dobby, and upon said back bottom draw
hook c, we mount a finger piece c² which projects over the end of said drawhook c.
When the drawhook c is lowered so as to come into contact with and be drawn forward
by the draw bar d the finger c² mounted on said draw hook c engages with and turns
the catch wheel k' one tooth, and by reason of said catch wheel / being fixed upon the
shaft k, said shaft k is also turned. To the shaft k and towards the front of dobby
we fix a chain wheel me over which we pass a chain m¹. The chain m¹ is so arranged
(see Fig. 4 & 5) that by placing the links at a suitable augle to each other they may
be readily attached or detached.
Upon the driving shaft n of dobby we mount a lever o upon which is mounted
a pulley o' which rests upon the boss of chain wheel m. Said lever o is cranked
so that the outer end o2 comes directly over the inner end g² of lever g which
carries the pattern cylinder e & f and said end g2 is coupled up to the lever o by
the connecting rod p.
We make use of a suitable cam m2 which is attached to the side of one of the
links in chain m¹ and when the cam m² is moved into contact with the pulley o
mounted upon lever o,the outer end o² of said lever o is raised,and by reason of the end
g' of the lever g being coupled to the lever o by the connecting rod p this the inside

page_text: end g of lever g is raised thereby lifting the pattern cylinder /, into contact with the
feelers or indicating levers & and at the same time lowering the pattern cylinder e
out of contact with the feeler or indicating lever h¹. When the cam m' passes from
under the pulley o', mounted upon lever o, the inner end g of lever g is depressed
by means of the spring q which is fixed upon a bracket attached to framework of
dobby, and by these means the pattern cylinder e is placed in contact with its feelers
or indicating levers & while the pattern cylinder is lowered out of contact with its
feelers or indicating levers h. To lock the pattern cylinder e when sprung into
position by the spring q, we form a lug or pin o³ upon the extended part o² of the
lever o.
We place a shaft r in a suitable position on top of dobby and extending over the
top draw hooks c¹ and upon this shaft we mount two levers, the lever r¹ being fixed
upon the shaft at the front of dobby, and the lever (see Fig. 3), being fixed upon
said shaft r towards the back of dobby. The lever r is made sufficiently heavy that
it fall with its own weight, and upon said lever r¹ we arrange a hook 2 so that when
said lever falls into position the hook comes over the lug or pin o' formed upon
the lever o and by these means said lever o is locked down and the pattern cylinder e
held firmly in contact with its feelers or indicating levers h¹. The lever 8 is so
arranged that it hangs down in front of the baulk b to which the back bottom draw
hook c is attached and to said lever 8. We binge another lever at having a hook &',
which comes in front of a pin b¹ fixed to baulk b, and a tail piece 83 which rests upon
a binding screw & placed in dobby frame.
When the baulk 6 is drawn forward by the back bottom draw hook c, the pin 6¹ in
baulk b presses against the hook 82 formed on lever s', and moves the lever a forward,
and by reason of the levers 7 and 8 both being fixed onto the shaft r the said lever 21
is also moved forward so as to clear the pin or lug o³ formed upon the lever o, so that
when the tail piece c², mounted upon the back bottom draw hook c, turns the catch
wheel and the cam m² fixed to link of chain m¹ is presented to the pulley o¹
mounted on lever o, the inside pattern cylinder f may be lifted into contact with its
feelers or indicating levers h. We mount catch wheels e¹ & fupon the shafts of
pattern cylinders e & f, and we make use of push catches w & which we fulcrum
on studs w & ¹ fixed to the driving lever u of dobby. By means of a stand z fixed
to framework of dobby the push catches w and x are only allowed to engage with the
catch wheels e¹ and f, when the pattern cylinders e or fare raised into contact with
their respective feelers or indicating levers h or h. When the pattern cylinders e or f
are lowered out of contact with their respective feelers or indicating levers, the push
catches ride upon the stand s and are thus prevented from turning the pattern cylinder.
By pegging the pattern surface so as to indicate upon the back bottom draw book
c causing said draw hook to engage with and be drawn forward by, the draw bar d
thereby turning the catch wheel and chain wheel m and by attaching or leaving off
the cain links m² from chain m¹ we can put into or out of contact either of the
pattern cylinders e or fat will.
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 is :-
(1) The improvements in dobbies of looms for weaving consisting of the combination
of mechanism substantially as herein described and illustrated by the annexed
drawings.
(2) In dobbies of looms for weaving a pair of pattern cylinders and means for
directly putting either of them into operation substantially as herein described and
illustrated by the accompanying drawings.
(3) In dobbies of looms for weaving the two pattern cylinder, and the chain wheel
and chain with cam, or their equivalent, for automatically actuating the lever which
puts either of the pattern cylinders into action as herein described and illustrated by
the accompanying drawings.

page_text: (4) The stand for blanking the push catches w or x when the pattern cylinders e
or f are lowered out of contact with their respective feelers or indicating levers h or h¹
as herein described and illustrated.
(5) The finger piece c² attached to the draw hook c for directly turning the catch
wheel k¹, as herein described.
(6) The means for locking the pattern cylinder e when placed in contact with the
feeler h' as herein described and illustrated by the annexed drawings.
(7) Chain carrying cams and the links of said chains so arranged that they may be
readily attached or detached substantially as, and for the purpose herinbefore
described.