IMPROVEMENTS IN THE CONSTRUCTION OF LOOMS FOR WEAVING "
Year: 1883

page_text: LETTERS PATENT to Robert Brownridge and Peter Bond both of Macclesfield
in the County of Chester for an Invention of "IMPROVEMENTS IN THE
CONSTRUCTION OF LOOMS FOR WEAVING "
PROVISIONAL SPECIFICATION left by the said Robert Brownridge and
Peter Bond at the Office of the Commissioners of Patents on the
12th September 1883.
ROBERT BROWNRIDGE and PETER BOND both of Macclesfield in the County of
Chester "IMPROVEMENTS IN THE CONSTRUCTION OF LOOMS FOR WEAVING
"
This invention relates to the construction of looms employed for weaving checks
and cross stripes by means of "drop boxes" with several shuttles; the object of
the Invention being to dispense with the cylinder and pattern chain usually
employed in connection with the "peg" for working the drop boxes, and to work
both the drop boxes and the picking motion from the Jacquard machine.
The invention is designed principally for looms for weaving silk but it is also
applicable to weaving woollen checks, ginghams and other similar fabrics.
For working the drop boxes, we dispense with the ordinary cylinder and pattern
chain and instead thereof we place beneath the "peg" the shorter arm of a bell
crank lever, the other end of which is connected by a cord to a hook in the
Jacquard machine. Whenever this hook is lifted, the cord pulls on the longer arm
of the bell-crank lever and draws the shorter arm of the same away from under
the peg and a catch lever holds it in this position until a change of shuttles is
required.
A cord attached to another hook in the Jacquard machine pulls the catch lever
and releases the bell crank lever which (on being released) is then caused (by
means of a spring) to bring its shorter arm beneath the "peg" and thus change
the "drop box" as required.
Thus it will be seen that the "drop boxes" are worked by two additional hooks
in the machine and two additional rows of holes in the pattern cards. The
picking motion is also worked by a cord connected to a hook in the Jacquard
machine.

page_text: The ends of the slide tappets against which the picking bowls act are connected
together by a sliding bar, near the centre of which is a projecting bracket or finger.
Against this bracket or finger acts a cam fixed on the boss of a spur pinion, and in
gear with this spur pinion is a toothed quadrant keyed on a short shaft. On this
same shaft is fixed a lever to the end of which the machine cord is attached; so
that whenever the hook in the Jacquard machine is raised, the cord acting on the
quadrant through the lever, causes the spur pinion to revolve the cam, and the
latter acting against the bracket or finger pushes the sliding bar in one direction,
and thus brings one of the slide tappets into action. And as soon as the hook in
the Jacquard machine falls and allows the cord to become slack, a spring attached
to the sliding bar draws the latter in the reverse direction and so puts the other
slide tappet into action, and thus the picking (as well as the changing of the
boxes) is effected by an additional row of holes in the pattern card.
This arrangement is capable of working a check pattern up, to five shuttles in
any variety of stripes or checks, without any danger of getting two shuttles into
one box, and is so simple that only one chain or card for the lifting boxes is
required to every stripe even when the colors are arranged in the most irregular
order; but when the colors are arranged in regular succession only as many cards
would be required as would make the circuit of the boxes.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Robert Brownridge and Peter Bond in the Patent Office on the
12th March 1884.
ROBERT BROWNRIDGE and PETER BOND both of Macclesfield in the County of
Chester "IMPROVEMENTS IN THE CONSTRUCTION OF LOOMS FOR WEAVING
This invention relates to the construction of looms employed for weaving checks
cross stripes and other designs by means of "drop boxes" with several shuttles;
the object of the invention being to dispense with the cylinder and pattern chain
usually employed in connection with the "peg" for working the drop boxes, and
to work both the drop boxes and the picking motion from the Jacquard machine.
The invention is designed principally for looms for weaving silk but it is also
applicable for weaving woollen checks, ginghams and other similar fabrics, and in
order that our invention may be clearly understood we have annexed hereunto a
sheet of drawings illustrative thereof in which Fig 1. is a side elevation of part of
our improved apparatus as seen from the inside of the loom.
Fig. 2 is a plan view and Fig. 3 is a front view of the apparatus which works
the picking motion.
•
a, a is the frame work of the loom, b is the crank shaft, and c the tappet shaft,
d is the lever which carries the peg as usual, e represents one of the ordinary
levers carrying a bowl f and connected at one end as usual by a link g to the
lever h which works the drop box in the looms now in use.
For working the drop boxes we dispense with the ordinary cylinder and pattern
chain, and instead thereof we place beneath the peg * the shorter arm of a bell
crank lever i, i the other end of which is connected by a cord jj to a hook in the
Jacquard machine, Whenever this hook is lifted, the cord j, j pulls on the longer
arm of the bell-crank lever i, i and draws the shorter arm of the same away from
under the peg
** and a catch lever k, k holds it in this position until a change of
shuttle is required.
A cord 1, attached to another hook in the Jacquard machine pulls the catch
lever k, k and releases the bell crank lever i, i which on being released is then
caused (by means of a spring m) to bring its shorter arm beneath the "peg" and
thus change the "drop box as required.
"
Thus it will be seen that the "drop boxes" are worked by two additional hooks
in the machine, and additional holes in the pattern cards thereof whenever the
changes are required to take place.
In working a pattern with four or five shuttles the lever_e and a similar lever
which lifts the drop at the other side of the loom are actuated in the usual
manner by a pair of pattern chains (not shown on the drawing) which lift the
bowls as required, but for a pattern with three shuttles, especially for weaving
pick and pick, we prefer to employ the apparatus as illustrated by Fig. 1. in
conjunction with the ordinary pattern barrel the chain of which is in this case
composed of links which lift and lower the lever e to the top and bottom positions.
These links may be only sufficiently numerous to complete the circuit of the barrel
over which they pass instead of being very numerous and composed of links
governing three positions of the shuttle box in varying order of succession as
hitherto.
In a suitable position (preferably at each end of the tappet shaft) we mount a
lever n, n provided with a bowl o, o working upon a cam p, p (at each end of a
shaft q, q) formed with four projections and four depressions so that as it is caused
to revolve an eighth part of a revolution by a lantern wheel at one side of the

page_text: "
:
loom, the lever n, n rises and falls alternately and being connected by a link r, r
in any convenient manner to the lever h, h and also to the lever which works the
box on the other side of the loom alternately lifts or lowers the same. These two
levers thus rise and fall together and therefore both pattern chains which work
the levers at e are alike. When more than three shuttles are required the link can
readily be disengaged from the levers h, h.
The projections and depressions on the cam p, p are such that the lever n, n is
raised into its middle position and lowered to the lowest thereby.
The lantern wheel is actuated by a catch on a lever 8, 8 worked by a bell crank
lever t, and link u, u from an excentric on the crank shaft of the loom, and thus
as there are eight pegs on the lantern wheel the same will be moved round an
eighth of a revolution at each revolution of the crank shaft.
-A cord from the Jacquard machine is attached to a wire w, w passing down to
a lever x, a on a short shaft at the other end of which is a second lever connected
by a link y, y to the lever 8, 8, a projection on the wire w, w is held when the said
wire is lifted by the Jacquard machine. by a spring latch s, z, which releases the
wire again when a cord ¹, z¹ is lifted by the Jacquard machine. Thus if the
pattern requires the top and middle shuttle to be changed alternately (pick and
pick) for some time the wire w, w is lifted and with it the lever a, thereby
raising the catch lever 8, 8 so that it does not actuate the cam p, p but leaves it in
the position shown on the drawings. The change is effected by the ordinary
pattern chain working against the bowl ff. If the bottom and top shuttles are
required to work alternately then the cam p; p is turned a quarter round by
dropping the wire w, w for one pick of the loom, and then raising it again; the
pattern chain works the lever e, e which can then drop to its lowest position.
If the bottom and middle shuttles are required to work alternately then the
lever is caused to come beneath the peg and thus stop the action of the
ordinary pattern barrel and the wire w, w being lowered the cam p, p alone works
the lever h, h. We prefer to put a constant break of any suitable construction
on the ordinary pattern barrel shaft and also on the shaft which carries the
cam p, p to ensure steadiness of action. The picking motion is also worked by a
cord 1, 1, connected to a hook in the Jacquard machine.
•
The ends of the slide tappets 2. 2. against which the picking bowls act are
connected together by the usual sliding bar 3. 3, near the centre of which is a
projecting bracket bracket or finger 4. Against this bracket or finger acts a cam 5
worked by a spur pinion 6, and in gear with this spur pinion is a toothed
quadrant 7. Keyed on a short shaft 8. 8, On this same shaft 8. is fixed a lever 9.
to the end of which the machine cord 1, is attached, so that whenever the corre
sponding hook in the Jacquard machine is raised, the cord 1, 1, acting on the
quadrant 7. through the lever 9. causes the spur pinion 6, to revolve the cam 5.
and the latter acting against the bracket or finger 4. pushes the sliding bar 3. in
one direction and thus brings one of the slide tappets into action as seen at Fig. 3.
And as soon as the hook in the Jacquard machine falls and allows the cord to
become slack a spring 10. 10. pulls down the lever 9. and a spring 11, 11, attached
to the sliding bar 3. 3, draws the latter in the reverse direction and so puts the
other slide tappet into action as seen at Fig 2. and thus the picking (as well as the
changing of the boxes) is effected by additional hooks in the Jacquard machine.
This arrangement is capable of working a check or pattern up to five shuttles in
any variety of stripes checks or designs without any danger of getting two shuttles
into one box, and is so simple that only one chain or card for the lifting boxes is
required to every stripe in the pattern even when the colors are arranged in the
most irregular order.
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
First. The general arrangement of mechanism hereinbefore described and
illustrated by the annexed drawings, or equivalent means, whereby the changing of

page_text: the shuttles and the picking motion are controlled by hooks and cards in the
Jacquard machine.
Secondly. The bell crank lever i, i or its equivalent actuated substantially as
herein before described and illustrated by the annexed drawing, by means of hooks
and cards in the Jacquard machine for the purpose of controlling the action of the
"peg" and thereby changing the shuttles, whether the said apparatus is used in
combination with the ordinary pattern chains or with the arrangement of
mechanism described and illustrated for working three shuttles.
Thirdly The apparatus substantially as above described and illustrated by the
annexed drawings for working the picking motion by hooks and cards in the
Jacquard machine.
In witness whereof we the said Robert Brownridge and Peter Bond have
hereunto set our hands and seals this tenth day of March in the year of our Lord
one thousand eight hundred and eighty four