Improvements in Jacquards employed in Weaving.
Year: 1897

page_text: We, GEORGE PRIESTLEY and FREDERICK PRIESTLEY, both of Mount Street Shed,
Leeds Road, Bradford, in the County of York, Manufacturers, do hereby declare
the nature of this invention to be as follows:-
66
This invention relates to improvements in that class of jacquard machines
for effecting the shedding in weaving looms generally known as single lift
jacquards," and its object is to keep the uprights or wires lifted" during
the whole of the time it requires to remain " up" instead of letting them down
between each "pick."
"
For this purpose we make the uprights with a hook or projection to engage
the "bottom board" and we impart a rising and falling motion to the bottom
board between each pick. We may use U shaped uprights with one limb longer
than the other and a hook is formed on the longer limb to engage the "grates
and a hook is also formed on the shorter limb to engage the end of a slot, one
of which is made for each upright, through the bottom board. Wires may be
secured close to the ends of the slots for the said hooks to engage.
The bottom board is lifted sufficiently each time to raise the upper hooks on
the uprights clear of the grate free to be pushed off by the "needles" but when
the said board descends they again engage the hooks unless held clear by the
needles.
The bottom board may be fixed to an arm or arms pivoted in front and arranged
to be lifted and lowered by a lever or its equivalent operated in any convenient
way.
Detal L
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Improvements in Jacquards employed in Weaving.
We, GEORGE PRIESTLEY. and FREDERICK PRIESTLEY, both of Mount Street Shed,
Leeds Road, Bradford, in the County of York, Manufacturers, 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 class of jacquard machines
for effecting the shedding in weaving looms generally known as single lift
Prins 71
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jacquards," and its object is to keep the "uprights" or wires "lifted" during
the whole of the time they require to remain up." instead of letting them
clown between each pick."
66
To fully describe our invention reference is made 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 side elevation of such parts of a single lift jacquard
machine as are necessary to illustrate the application of our improvements.
Figure 2, is a separate plan view of the bottom board.
Figure 3, is a separate view of one of the uprights.
Figure 4, is a view illustrating a modification herein after referred to.
The sheet metal Bottom board A of the jacquard is fixed to the arms A², A2
supported at the back by a rod A3 at each side hinged between the lugs A+, A*
fixed at each side of the bottom board. The rods A3 slide vertically up and down
in guide eyes formed in the lugs B, B projecting inside each side frame B² of
the jacquard. To allow of the bottom board lifting vertically with the rods we
support the front end of the arms on a cross rod C held at each end in a sliding
bearing C2 mounted in a horizontal slot C³ formed in the standard C fixed to
each gantry or bearing rails C5 supporting the jacquard.
The uprights, one of which is shown separately in Figure 3, are made with a
long limb and a short limb D2. The long limb D has a hook D3 at the top
to engage one of the bars E of a top grate fixed across between the side frames
of the jacquard. The double part of the upright passes through slots A5 made
in rows all along the bottom board by the sides of the parallel cross wires A
soldered or otherwise secured to the top of the board. A few only of the slots A5
are shown in Figure 2. The hooks D4 on the upper ends of the shorter limbs D³
engage the cross wires A6 and are lifted with the bottom board sufficiently to
raise the hooks D3 above the bars E of the fixed grate. The parts are so rela-
tively arranged that all the uprights the hooks D³ of which are not pushed
clear of the bars E by the needles H engage such bars and are supported thereby
until released by the needles and the bottom board is lifted sufficiently each time
to just lift the hooks D3 off the grate bars E to permit of them being pushed
clear of the bars by the needles if they are required to be lowered. The bars E
of the top grate are each fixed slightly lower than the one behind them so as to
be all the same distance from the bottom board when the latter is at the top
of its stroke. The neck cords are tied to the bottom D5 of the uprights.
In the modification shown in Figure 4 the neck cords J pass through the
bottom board instead of the uprights, the hooks 1) may therefore be dispensed
with and the U shaped bottoms D5 of the uprights rest in little recesses A7
formed in the bottom board.
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:-
In a single lift jacquard the combination with the rising and falling bottom
board of the fixed grate above, substantially as herein shown and described.
Dated this 15th day of August 1898.
DRACUP & NOWELL,
Patent Agents, Bradford.