IMPROVEMENTS IN JACQUARDS
Year: 1877

page_text: LETTERS PATENT to Joseph White, of the Town and County of the Town. of
Nottingham, Mechanist, for the Invention of "IMPROVEMENTS IN JACQUARDS."
Sealed the 15th Sentemba 1977 and dated the TALL T
PROVISIONAL SPECIFICATION left by the said Joseph White at the Office
of the Commissioners of Patents on the 14th June 1877.
JOSEPH WHITE, of the Town and County of the Town of Nottingham, Mechanist.
"IMPROVEMENTS IN JACQUARDS."
I employ one or more tiers of boxes; each tier consists of two or more boxes; in
each tier the inner ends of the upper ones are a little in advance of the lower ones,
and are slotted to allow the draw bits of the lower ones to slide therein; the
upper ends of droppers slide between the boxes, the selected ones being lifted by a
cylinder carrying cards in the usual way, or else by a plate or grid which falls to
allow of the passage of the cords over it, such passage being effected by a studded
plate or disk rotating at each end of the grid, the racking of the disk being effected
by a clawker or driver made reversible, when required, in the usual way; I employ
two driving bars to each tier of boxes; and to obtain a draw upon each bar the
jacquard operates the opposite way to the lift of the jacquard; instead of employing
an helically-coiled spring to each bar I use a concentrically-coiled spring. By these
means I am enabled to build a jacquard to operate any number of bars much
narrower than heretofore, besides effecting a considerable saving in the length of
room heretofore occupied by the jacquard and springs at each end of the machine to
which they are attached.

page_text: each tier the inner ends of the upper ones are a little in advance of the lower ones,
and are slotted to allow the draw bits of the lower ones to slide therein; the
upper ends of droppers slide between the boxes, the selected ones being lifted by a
cylinder carrying cards in the usual way, or else by a plate or grid which falls to
allow of the passage of the cards over it, such passage being effected by a studded
plate or disc rotating at each end of the grid, the racking of the disc being effected
by a clawker or driver made reversible, when required, in the usual way; I employ
two driving bars to each tier of boxes; and to obtain a draw upon each bar the
jacquard operates the opposite way to the lift of the jacquard; instead of employing
an helically-coiled spring to each bar I use a concentrically-coiled spring. By these
means I am enabled to build a jacquard to operate any number of bars much
narrower than heretofore, besides effecting a considerable saving in the length of
room heretofore occupied by the jacquard and springs at each end of the machine to
which they are attached.
DESCRIPTION OF THE DRAWINGS.
Figure 1 represents a sectional view of one tier of my improved boxes.
Figure 2 a view of the left end of one of my improved lifting plates or grids and
rotating disc looking at the right end of the jacquard; Figure 3, a front end view
of the same grid and disc; and Figure 4, a sectional view of some of my improved
draw springs.
At Figure 1 a tier of two boxes is shewn; the inner end of the upper box A is
in advance of the lower box B, and is slotted to allow the draw bit B₁ of the lower
box to slide therein. The boxes lie and slide in sleys C, secured to cross bars D,
attached to the framing of the jacquard, which is of the usual construction, as are
also the driving bars E, which are operated as heretofore. The upper ends of
droppers F slide between the boxes; the selected droppers may be lifted by cylinders
carrying cards in the usual way, or by plates or grids G, constructed and operated
as follows-Each grid, the inner one of which is shewn up and the outer one down,
is carried by the upper ends of two or more pair of rods G₁; the rods are passed
through and slide up and down in blocks G, the lower ends of the rods being
secured in and carried by a plate G³, which has a rising-and-falling movement given
it by means of a link G at each end attached to levers operated by cams in the
usual way. The blocks G² are bored out to receive the axle of the cylinder or
grid G, outside each end of which is a studded plate H, which may be racked by a
clawker or driver made reversible, when required, in the usual way, or else by
means of toothed racks I and J, the rack I receiving the teeth of a wheel secured on
the back end of the outer cylinder; and the rack J receiving the teeth of the lowest
of a pair of wheels carried by an eye bolt K at the front end of the inner cylinder,
which arrangement ensures the cylinders, as they alternately fall, being racked
towards each other. The eye bolts K, which carry the cylinder or grid axles, each
pass through a carrier K¹ secured to the slide bars of the jacquard, which carry the
driving bars in the usual way. I adjust the eye bolts in the carriers by means of a
slot in their upper ends, through which a key is passed, the said key also passing
through a nut L, thus allowing the eye bolt to be secured in position at each half
revolution of the nut.
In the above arrangement of apparatus, instead of the cylinders. making a partial
revolution to effect a change of cards, the plate or grid G and the studded plates H
fall sufficient to clear the lower end of the droppers, then the grid G falls to clear
the cards while they are racked, when both rise to select, and the movements are
repeated.
And in order to obtain a draw upon each bar operated by the jacquard the
opposite way to the lift. of the jacquard I employ to each bar, at the reverse end of
the machine to the jacquard, a concentrically-coiled spring L secured to a plate M
by a stud, there being a second stud in the same plate which acts as a stop to
prevent the spring from turning upon the first stud, the outer or horizontal. end-of
the springs being attached to the left end of the bars in the machine.
t

page_text: The plates M lie upon and are supported by bars O and rods N, the ends of which
are carried by and secured in the spring frame at the left end of the machine.
By the above arrangements of apparatus, and by employing my improved springs,
I am enabled to build a jacquard to operate any number of bars in a much narrower
space than heretofore, besides effecting a considerable saving in the length of room
heretofore occupied by the jacquard and springs at each end of the machine to which
they are attached.
Having now described the nature of my said Invention, and in what manner
the same may be performed, I declare that I claim, for the improved boxes and
lifting plate or grid, and for the concentrically-coiled draw springs applied to a
jacquard, operating as described and illustrated in the accompanying Drawings.
In witness whereof, I, the said Joseph White, have hereunto set my hand and
seal, this Eighth day of September, in the year of our Lord One thousand
eight hundred and seventy-seven.
Witness,
H. W. GOUGH, C.E.,
Nottingham.
JOSEPH WHITE. (L.S.)