IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1883

page_text: LETTERS PATENT to William Smith of the Sun Iron Works Heywood and
Joseph Wrigley of the Firm of Messieurs Wrigleys and Schofield Cotton
Manufacturers of Bury both in the County of Lancaster for an Invention of
IMPROVEMENTS IN LOOMS FOR WEAVING
PROVISIONAL SPECIFICATION left by the said William Smith and Josopli
Wrigley at the Office of the Commissioners of Patents on the 27th June
1883.
"I
WILLIAM SMITH of the Sun Iron Works, Heywood and JOSEPH WRIGLEY of the
firm of Messieurs Wrigleys and Schofield, Cotton Manufacturers, of Bury both in
the County of Lancaster. "IMPROVEMENTS IN LOOMS FOR WEAVING
»
The object of our Invention is to simplify the jacquard motion and to dispense
with springs and also to form a dwell for the shuttle to pass through the shed
In performing our Invention we use treadles (made in the form of angle levers)
pivoted on the treadle stud. The top and bottom jacks are coupled to the long
end of the treadles and the double hooks rest at the top end of the angle part.
These double hooks are acted upon by the chain of pulleys which form the pattern:
motion is given to the chain of pulleys by a peg and star wheel. The grifes are
also pivoted on the treadle stud and motion is given to them by means of a wheel
secured to the crank shaft with an enclosed cam cast on each side: theso enclosed
cams act upon levers connected to the front and back grifes and are made so as to
allow sufficient dwell for the shuttle to pass through the shed.
The chain of pulleys acts on the front part of the double hooks and holds them
on to the front grife until the next change takes place when as the pulleys leave
the double hooks the weighted ends of the hooks cause them to fall and to be
caught and held by the back grife.
By this arrangement no springs are required for pulling the hooks on to the
hack orife

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Smith and Joseph Wrigley in the Great Seal Patent
Office on the 26th December 1883.
WILLIAM SMITH, of the Sun Iron Works, Heywood and JOSEPH WRIGLEY of the
firm of Messieurs Wrigleys and Schofield, Cotton Manufacturers, of Bury,-both-in-
the-County-of-Lancaster "IMPROVEMENTS IN LOOMS FOR WEAVING
"
The object of our Invention is to simplify the jacquard motion and to dispense
with springs and also to form a dwell for the shuttle to pass through the shed.
In performing our Invention we use treadles (mado in the form of angle levers)
pivoted on the treadle stud. The top and bottom jacks are coupled to the long
end of the treadles and the double hooks rest at the top end of the angle part.
These double hooks are acted upon by the chain of pulleys which form the
pattern: motion is given to the chain of pulleys by a peg and star wheel. The
grifes are also pivoted on the treadle stud and motion is given to them by means
of a wheel secured to the crank shaft with an enclosed cain cast on each side:
these enclosed cans act upon lovers connected to the front and back grifes and are
made so as to allow sufficient dwell for the shuttle to pass through the shed.
The chain of pulleys acts on the front part of the double hooks and holds them
on to the front grife until the next change takes place when as the pulleys leave
the double hooks the weighted ends of the hooks cause them to fall and to be
caught and held by the back grife.
By this arrangement no springs are required for pulling the hooks on to the
back grife.
And in order that our Invention may be fully understood and readily carried
into effect we will proceed to describe the accompanying sheet of Drawings reference
being had to the figures and letters marked thereon.
Figure 1 is a front view and Figs. 2 and 3 are end views of the jacquard motion
of a loom to which our improvements are applied.
Similar letters refer to similar parts throughout the several views.
In these views a is the crank shaft of the loom upon which is keyed or secured
the cam wheel a¹: upon each side of this wheel a¹ is an inclosed cam a2 and a³
respectively the cam a² is connected by a lever a to and drives the front grife b
and the cam a³ is connected by a lever as to and drives the back grifo b¹ upon
which is the spring leveller 62: both the front grife b and back grifo baro pivoted
on the treadle stud d' each of the enclosed cams a² and a³ is so formed and pro-
portioned as to allow sufficient pause or dwell in the motion of the jacks to enablo
the shuttle to pass through the shed.
The double hooks c are fitted loosely and are free to rock on the short arms of
the treadle angle levers d pivoted on the treadle stud d¹ and are so weighted at
their back ends that they always fall on and hold the back grife b' unless depressed
by any of the pulleys e carried in the lattice e': these pulleys e are arranged so as
to form the required pattern. The cam wheel a' has spur teeth on its periphery
which gear into and drive the peg wheel secured to the shaft fl: the peg wheel f
gives motion to the star wheel g secured to the shaft g', upon which is also keyed
or secured the lattice drum h: the lattico e' with the pulleys e passes under and
round and is driven by the lattice drum and over and round the lattice bearer i
carried in suitable bearings in the adjustable forked bracket j. The top and
bottom jacks (not shown in the drawings) are coupled to the long arms.of the
treadle angle levers d. When motion is imparted from the cam wheel a¹ to the
peg wheel and so to the star wheel g and shaft g¹ on which is keyed the lattico

page_text: drum h, the lattice e¹ is driven and some of the pulleyse depress the front ends of
the corresponding double hooks c, thereby releasing the back grife b¹ and holding
the hooks on to the front grife b; the inclosed cam a' then drives the front grife b
which carries forward the double hooks a thus depressing the treadle levers d in
connection with them and so operating the top and bottom jacks: when the next
change takes place the pulleys e loave the front ends of the double hooks c the
weighted ends of which then fall when they are caught and carried back into
position by the back grife 6' driven by the inclosed cam a³.
By this arrangement no springs are required for pulling the double hooks c back
into their normal position.
Having stated the nature of our Invention and described the manner of
performing the same.
We declare that we claim
1.-The improvements in looms for weaving, substantially as and for the purposes
heroin shown and described.
2. In a loom for weaving, the cam wheel a¹ with the inclosed cams a³ a³ con-
nected to and actuating respectively the front grife b and back grife 6' substantially
in the manner and for the purposes herein shown and described.
3.-The double hooks c fitted loosely on the short arms of the treadle angle levers d
substantially in the manner and for the purposes herein shown and described.
In witness whereof I the said Joseph Wrigley for myself and on behalf of the
said William Smith have hereunto set my hand and seal this twenty fourth day
of December One thousand eight hundred and eighty three.
JOSEPH WRIGLEY (L&)