IMPROVEMENTS IN JACQUARD MECHANISM FOR OPENING AND CLOSING THE SHED IN POWER LOOMS
Year: 1884

page_text: We, JAMES CRABTREE of Croft Mills, Heckmondwike, Yorkshire Manufacturer,
and JIM BREARLEY of the same place, Foreman Mechanic do hereby declare the
nature of our invention for "IMPROVEMENTS IN JACQUARD MECHANISM FOR
OPENING AND CLOSING THE SHED IN POWER LOOMS" to be as follows:-
Our improvements in jacquards consists in simplyfing their construction, making
them positive and reliable in their action, and adaptable for weaving narrow and
broad pieces.
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In order to carry out our Invention we employ four "plane boards" of ordinary
construction pierced with holes through which the "nick bands" pass in the usual
manner. Each end of these "plane boards" fit into grooves or slots made in the
framework of the machine, up and down which they are caused to move when
operated; and at each end of these "plane boards" we hinge in suitable brackets a
vertical needle or rod provided with a hook at its upper end for purposes herein-
after explained.
Above the machine and at each side thereof we employ a horizontal shaft upon
which is secured hooked knives, or lever arms, one end being provided with double
catches and employed for catching under the hook on the top of the vertical needle
for lifting the "plane boards" and opening the warp. Suitable cross bars are
employed at each side of the machine one end of which passes through the frame-
work and is operated in one direction by the pegging cylinder, and in the opposite
direction by a spiral spring.
The shafts carrying the hooked knives are connected to the tappit shaft by a rod
which imparts to the said shaft a rocking or oscillatory motion, such oscillatory
motion giving to the hooked knives a continuous up and down movement, each
upward movement thereof catching under one or other of the hooked needles,
whereby one of the "plane boards" are lifted and the warp opened thereby.
In order that the proper needle may be presented to the hooked lifting knife,
the cross bar through which the needles pass are pegged in one direction by the
pegging cylinder, such pegging pushing the cross-bars forward so as to present the
hook of the needle intended to be lifted under the lifting knives; as soon however
as the knife descends and the "plane boards" lowered a spiral spring draws the

page_text: cross bars back again, presenting the hook of another needle under the lifting
knives, which is now lifted whilst the other remains, and so on, one after another
with great regularity and certainty of action.
As the cross bars are moved by the pegging cylinder to change the hooks, just
before the lifting knife has completed its descent, the double hook of the knife has
to pass down between the upper ends of the needles and in doing so, the newly
presented hook is pushed side ways to allow the lifting knife to pass; in order
however to make the said needle return to its place under the lifting knife a
suitably hinged casting is employed operated by spiral spring, which causes the
needle to return under the lifting knife immediately it is set at liberty; a similar
casting operated by spiral spring removes the needle which has just descended from
off the hooked knife, by this means as soon as the knife descends one needle is
pushed off and another is pushed on, and this occurs each time the knife descends,
consequently positive and self-acting lifting mechanism for opening and closing the
warp is obtained.
TASKER & CROSSLEY,
Patent Agents, Halifax,
Agents for the Applicants.

page_text: We, JAMES CRABTREE of Croft Mills, Heckmondwike, Yorkshire, Manufacturer,
and JIM BREARLEY of the same place, Foreman Mechanic do hereby declare the
nature of our invention for "IMPROVEMENTS IN JACQUARD MECHANISM FOR
OPENING AND CLOSING THE SHED IN POWER LOOMS and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement :-
Our improvements in jacquards consists in simplifying their construction, making
them positive and reliable in their action, and adaptable for weaving narrow and
broad pieces.
In order that our Invention may be better understood, we herein give reference
to the accompanying Sheet of drawings, wherein Fig 1 is end view of our improved
jacquard, Fig 2 front elevation, and Fig 3 plan of same. A is framing of
machine and B are four "plane boards" of ordinary construction and pierced with
holes through which the "nick bands" C pass in the usual manner. Each end of
these "plane boards" fit into grooves or slots D formed in the framework of the
machine for the purpose of sliding up and down therein when operated.
At each end of the "plane boards" we hinge in brackets a a vertical needle or
rod E having a hook bat its upper end for purposes hereinafter explained. On the
top of the machine and at each side thereof we fix brackets F carrying horizontal
shafts G upon which we secure hooked knives or lever arms H one end being
provided with double catches cand employed for catching under the hooks b on
the top of the vertical needles E for lifting the "plane boards" and opening the
warp. At each end of the machine we employ cross bars I. the front end of which
is provided with pins or studs d which pass through holes made in the front
rail J.
These pins are struck by the pegging cylinder K for the purpose of pushing the
cross bars I in the direction of the arrow e whilst spiral springs L operate them in
the opposite direction. Upon the top of the cross bars I we hinge four pairs of
small jaws which are closed by small spiral springs g and between these jaws the
vertical needles E pass so that when the cross bars are operated in either direction
the needles are carried with them whereby the books at the top are presented first
to one lifting knife and then to the other according to selection of the pegging
cylinder, and to the pattern being woven.
The horizontal shaft G carrying the hooked knives is connected to the tappit or
other suitable shaft of the loom by a rod M which imparts to the said shaft a
rocking or oscillatory motion, such motion giving to the hooked knives a continuous
up and down movement, each upward movement thereof catching under one or
other of the hooked needles whereby one of the "plane boards" are lifted and the
warp opened thereby meanwhile the other boards remain stationary until the
knives descend for another selected hook, and so on one after another with great
regularity and certainty of action.

page_text: As the cross bars I are pushed forward in the direction of the arrow e by the
pegging cylinder to change the needles C just before the lifting knife has completed
its descent so as to place the hooked end of the needles in position for being caught
and lifted (as shewn in dotted lines) the double hooked end of the knife has to pass
down between the upper ends of each pair of needles and in doing so the newly
presented hooked needles are necessarily pushed sideways to allow the lifting knife
to pass, but as soon as it has passed, one of the jaws f on the cross bar is closed
again by the action of the spiral spring g whereby the needles which have been
pushed sideways are caused to return again into the position of the dotted lines
and as soon as the knives have completed their descent and released the needles,
those which have just descended are removed from the knives by the spiral springs g
whilst the newly presented needles are in position to be taken hold of and at the
next upward movement of the knives they are lifted whereby the warp is opened
and another shed formed and so on one after another, therefore each time the knife
descends, one needle is pushed off and another needle pushed on, according to the
pegging mechanism, consequently positive and self-acting lifting mechanism for
opening and closing the warp is obtained.
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
Firstly. The employment of the needles C in combination with the lifting
knives H for opening and closing the warp, in manner substantially as herein
shewn and described.
Secondly. The employment of the jaws f when used in combination with the
cross bars I for purposes substantially as herein described.
Dated this 14th day of February 1885.
TASKER & CROSSLEY,
Patent Agents,
Commercial Street, Halifax,
Agents for the Applicants.
TASKER & CROSSLEY,
Patent Agents,
Commercial Street, Halifax,
Agents for the Applicants.