Improvements in or relating to Loom Pattern Mechanism.
Year: 1890

page_text: Date of Application, 2nd July, 1890
Complete Specification Left, 1st Apr., 1891-Accepted, 2nd May, 1891
PROVISIONAL SPECIFICATION.
Improvements in or relating to Loom Pattern Mechanism.
We, JOHN WORMALD, of the firm of Wormalds & Walker, of Dewsbury, in
the County of York, Manufacturers, and GEORGE WASHINGTON, of the Textile
Department, Yorkshire College, Leeds, in the County of York, Assistant Lecturer,
do hereby declare the nature of this invention to be as follows:-
Our invention has reference to Jacquard harness looms employed in weaving,
but our improvements are applicable to other classes of pattern weaving loom,
the object of our invention being to provide means whereby the weaving of the
pattern may be discontinued and resumed at the will of the operative, and this we
accomplish by the use of mechanism for removing the card or pegging cylinder
beyond the reach of the needles or other pattern selecting mechanism. In pattern
weaving looms, it is customary for the card cylinder to be oscillated to and fro for
the purpose of striking the needles by means of rods and levers actuated by an
eccentric on the crank or other shaft of the loom and according to our invention
the connecting rod attached to the eccentric is broken or made in two parts,
jointed together and provided with a hand lever within easy reach of the weaver,
such jointed levers being bent or in an angular position when the loom is in
its normal position, but when it is necessary to stop weaving the pattern the hand
lever can be operated in such a way as to throw the jointed angular levers straight
or in a line with each other, the effect of which is to lengthen the distance between
two given centres, whereby the card cylinder is thrown beyond the reach of the
pattern selecting needles, and although the weaving of the loom continues, the
formation of the pattern is stopped, as the Jacquard needles have ceased to be
operated by the card cylinder, but as soon as the hand lever is reversed, the jointed
levers are again placed in an angular position, and the card cylinder allowed to
beat up against the pattern needles, for the formation of the pattern.
In addition to the advantages above named, the pattern cards are not damaged
by the needles, if the weaver should turn the card cylinder over during the time
the loom is standing, as the cards are temporarily beyond the reach of the needles.
Dated this 1st day of July 1890.
TASKER & CROSSLEY,
Halifax, Agents.
COMPLETE SPECIFICATION.
Improvements in or relating to Loom Pattern Mechanism.
We, JOHN WORMALD of the firm of Wormalds & Walker, of Dewsbury in the
County of York, Manufacturers, and GEORGE WASHINGTON of the Textile
Department, Yorkshire College, Leeds, in the County of York, Assistant Lecturer,
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:-
Our invention has reference to Jacquard harness looms employed in weaving, but
our improvements are applicable to other classes of pattern weaving loom, the object
of our invention being firstly to provide means whereby the weaving of the pattern
may be discontinued and resumed at the will of the operative; and secondly to
enable the card cylinder to be removed further away from the needles when it is
desired to revolve the card cylinder by hand, and thus avoid damaging the cards;
[Price 6d.

page_text: .T
and these objects we accomplish by the use of mechanism for removing the card or
pegging cylinder beyond the reach of the needles or other pattern selecting
mechanism.
In order that our invention may be more fully understood we will now make
reference to the accompanying drawing representing an end elevation of such
portions of a loom as are necessary to shew the application thereto of our improve-
ments. A represents the framework of the loom and B the crank shaft. The frame
of the Jacquard is shewn at C, where D are the ordinary horizontal needles, which
are operated for regulating the pattern being woven by means of the card cylinder E
made to reciprocate for the purpose of operating the said needles by means of lever
arm F and bell crank lever G actuated in the old manner by a connecting rod H
attached direct to the eccentric I fixed on the crank shaft B, so that each
revolution of the crank shaft caused the card cylinder E to beat up and operate
the needles.
Our invention consists in making the connecting rod H in two or more parts
jointed together at J provided with a horizontal connecting rod K attached to the
hand lever L so that when the pattern is being formed, the jointed levers occupy
the positions shewn in dotted lines, whereby the card cylinder beats up as the crank
shaft revolves and operates the needles D, but when it is necessary to stop the
weaving of the pattern the hand lever L is drawn forward in the direction of the
arrow, and made secure in a notch in the plate M, so as to throw the jointed levers H
in a straight line with each other, as shewn in full line of the drawing, the effect of
which is to lengthen the distance between the two centres B and N whereby the
card cylinder is thrown beyond the reach of the pattern needles and although the
weaving of the loom continues the formation of the pattern is discontinued, as
the Jacquard needles can no longer be operated by the card cylinder, but as
soon as the hand lever is reversed the jointed bars are again placed in the angular
position as shewn in dotted lines, whereby the card cylinder is again allowed to beat
up and strike the needles for the formation of the pattern.
In addition to the advantages above named, the pattern cards are not damaged
by the action of the needles as much as formerly, as when the weaver requires to
turn the card cylinder over during the time the loom is standing as is sometimes
necessary the cards can be temporarily placed further away from the needles than
in the ordinary Jacquard to allow the card cylinder to be revolved.
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 Jacquard looms the employment of a jointed connecting rod or rods such
as H for purposes herein described and operated in the manner substantially as
set forth.
Dated this 31st day of March 1891
TASKER & CROSSLEY,
Halifax, Agents.