IMPROVEMENTS IN LOOMS
Year: 1876

page_text: .
PROVISIONAL SPECIFICATION left by David Sowden and Reuben Calvert
Stephenson at the Office of the Commissioners of Patents on the 21st September
1876.
DAVID SOWDEN, and REUBEN CALVERT STEPHENSON, of Bradford, in the County
of York, Machine Makers and Ironfounders. "IMPROVEMENTS IN LOOMS."
The object of our Invention is to dispense with the use of knives, grifes, or
lifters, and hooks or claws attached to the healds for lifting the warps to use the
jacquard cylinder direct and positive, and to dispense with weights or springs used
for drawing the healds up or down when used in dobby or treading machines.
We accomplish our object in the following manner-To any convenient part of
a common loom we attach the framework of our apparatus; motion is imparted to
the apparatus by means of an endless chain or shaft; to the main shaft of our
apparatus we secure a bevel wheel which gears into another bevil wheel secured on one
end of a short shaft fixed at right angles to the aforesaid main shaft; at the other end
of this short shaft we attach a stud plate in which is secured a stud for giving a reci-
procating horizontal motion to the cylinder carriage; at each end of the said carriage
fitted in suitable bearings we place a jacquard cylinder having a number of holes
bored in the periphery at right angles to the axis; on to the framework between
the jacquard cylinders and the centre of our apparatus we secure two stays having
holes bored through them corresponding to the holes in the jacquard cylinders, one
row of holes being perpendicular above the other; through each of these holes we
place a spindle, in the centre of which is secured a plate having a slot cut in the
front edge of the same; into each of these slots is fitted one end of a double bell-
cranked lever centred on a stud secured to the framework of our apparatus, one
set of levers being perpendicular above the other; each of the top bell-cranked
Motion
levers is secured to the bottom one immediately under it by means of rods.
is imparted to the cylinders in the following manner :-Near to each end of the
main shaft of our apparatus we secure a wheel which gears into another wheel
secured to one end of cach jacquard cylinder; at the extreme end of every motion
of the carriage the cylinders are operated upon by the wheels alternately; the
carriage reciprocating bring the points of the aforesaid spindles in contact with the
cards upon the cylinder when the spindles pass through the holes in the cards
opposite to the points of the spindles; where no openings exist the spindles are
pressed against the solid part of the cards which causes the double bell-cranked

page_text: levers to lift the particular healds required. To one end of the bottom bell-cranked
levers is attached by means of a rod to one end of a lever centred on a stud fixed
to the bottom of the loom; the other end of said lever is attached to the under side
of the healds, thus drawing the healds as required without the aid of springs or
weights.
In our apparatus we use an improved metallic card arranged in such a manner as
to be capable of adjustment, which we accomplish as follows:- -We form a piece of
tin or other metal with a shallow flange longitudinally on each side, and in the
centre between the flanges the tin or metal is raised to about the same height as the
flanges, and pieces are cut out transversely down to the level of the plates; opposite
to these transverse openings holes are bored, one on each side; between the
transverse openings are fitted narrow plates of iron or other metal, of such a length
as to go between the longitudinal flanges with ease; each of these iron plates has
a hole bored or punched corresponding to the holes in the tin plate; these narrow
iron plates are put between the transverse openings in the manner required for
the pattern of the piece, and are kept in position by a wire passing under the
raised part of the tin plate, and over the tops of the iron plates; the tin plates are
thread together as ordinary cards.
We wish it to be distinctly understood that we do not limit qurselves to the
precise details herein-before mentioned, as the same may be varied without departing
from the nature of our Invention, but what we claim as our Invention is,-
A direct and positive motion both up and down, and direct action with the cards
without the intervention of catches or other connections.
And in addition we also claim the arrangement of our metal card.