MENTS IN LOOMS
Year: 1881

page_text: PROVISIONAL SPECIFICATION left by the said Edwin Jackson at the Office
of the Commissioners of Patents on the 16th February 1881.
"
EDWIN JACKSON, of Bradford, in the County of York, Engineer. IMPROVE-
MENTS IN LOOMS."
The object of this Invention is to supersede the use of catches and ratchet wheels
hitherto used in the taking up the cloth in weaving, and to wind the cloth direct
on to the cloth beam, dispensing with friction rollers, levers, and weights, where
now in use.
I accomplish the above object by substituting a groove wheel in lieu of ratchet
wheel, which is centred upon the shaft carrying change wheels now in ordinary
use. This grooved wheel is pushed forward by an eccentric pawl on a lever
centred on the axis of the grooved wheel. This lever is pushed forward by another
lever working in slot of a rat tail lever, which latter has motion imparted to it by
a stud projecting from sword of loom. Another lever is centred on axis of grooved
wheel carrying eccentric pawl, which locks the grooved wheel when the upper
pawl is released.
In order to prevent the loom taking up cloth when the weft breaks I attach a
small lever to the present slackening rod. The end of this lever I connect with
a curved lever centred on a stud in side of loom. When the weft fork actuates
slackening rod in the ordinary way, the small lever upon it is lifted, and at the
same time the curved lever is lifted by means of the connection above referred to;
the driving pawl is thereby lifted by the curved lever acting upon a projection
upon the same.
take up, I attach
cloth beam, and
Upon one end of
In order to regulate the amount of cloth the cloth beam is to
a rod passing from end to end of loom. This rod rides upon the
as the cloth increases in diameter upon it the rod is lifted up.
this rod I attach a lever; a chain from the end of same is passed round a small
pulley, and again over another pulley on rat tail lever stud, and connected to lever
working in the slot above mentioned on the rat tail lever.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Edwin Jackson in the Great Seal Patent Office on the 16th August
1881.
EDWIN JACKSON, of Bradford, in the County of York, Engineer. "IMPROVE-
MENTS IN LOOMS."
The object of this Invention is to supersede the use of catches and ratchet wheels
hitherto used in the taking up of the cloth in weaving, and to take the same direct
on to the cloth beam, dispensing with friction rollers, levers, and weights, where
now in use, and consists in substituting a wheel without teeth, by preference a
grooved wheel, and other mechanism in lieu of ratchet wheel and pawls or catches.
This grooved wheel is fixed on a shaft in lieu of a racket wheel; on the other end
of which is the change wheel gearing into wheels in connection with the piece
beam, and this beam is revolved by the intermittent action of an eccentric driving
pawl actuated by the sword of the loom through a series of levers.
When the weft breaks, or is used from off the bobbin in the shuttle, I prevent
the loom taking up the cloth by means of levers in connection with the ordinary
slackening rod, which, when actuated by weft fork in the usual manner, raises the
before mentioned driving pawl from off the grooved wheel, the wheel being
prevented from revolving in the opposite direction by means of another eccentric
pawl locking in the wheel and keeping the same stationary.
In order that the amount of cloth to be taken up by the cloth beam may be
regulated in proper proportion to the increase in the diameter of cloth wound on
cloth beam I pass à rod from end to end of loom which rests with its own weight
on the cloth on the piece beam, and is suitably arranged to slide on brackets fixed
to ends of loom, the rod being free to rise, so that when the cloth beam increases
in diameter by the rolling on of the cloth, the rod is raised, the same being
connected to a weighted lever by a rope or chain which passes round a small pulley,
and again over another pulley mounted on a suitable stud, consequently the weighted
Jever is raised nearer to the stud, thereby reducing the length of the pick or stroke
in the proportion required as the cloth beam increases in diameter.
In the accompanying Drawings, Figure 1 represents the end elevation of such
portions of a loomi as are required to make clear my Invention, and Figure 2 is a
front view of the same. The frame or loom ends are indicated by letter A ; secured
to one end of loom is bracket B, carrying a short shaft or driving spindle, on to
one end of which is secured grooved pulley C, and to the other end a change
wheel D geared into a train of wheels D' (shewn by dotted lines) in connection
with piece beam E, to which motion is communicated in the following manner:—
To the ordinary sword F, or other suitable oscillating part of the loom I secure a
slotted bracket F!; to this bracket is secured what is usually termed rat tail F,
one end of which passes into bottom slot hole of rat tail lever G, and by the action.
of the sword an oscillating motion is given to the rat tail lever. To the. upper
portion of lever G is attached weighted lever H, which is made to slide freely in
top slot hole G1; to weighted lever H I connect by rod J pawl levers J¹ centred
on the axis or shaft carrying grooved wheel C, the levers J¹ being on each side of
grooved wheel C, and between these levers is mounted an eccentric pawl K which
fits the groove in wheel C, so that when the loom is in motion the levers J¹ with
pawl K will have motion imparted to them by sword F through the intermediate
levers G, H, and rod J, thus when moving in one direction the eccentric pawl will
be pressed into the groove in wheel C, and locking therein will cause the same to
turn slightly on its axis, moving the piece beam which is connected there with by
gearing, as before described, the distance of a pick.

page_text: In order that the grooved wheel C may retain its position on the reversal of the
motion of levers J', I mount on shaft to which grooved wheel is secured another
pair of levers L, which are prevented from turning round by lug L' in contact with
boss of bracket B. Between the aforesaid levers L I mount another eccentric
pawl M mounted in the opposite direction to the driving pawl, so that when
pawl K is released; pawl M locks with groove wheel C, and retains the same in a
stationary position.
By altering the position of rat tail F2 in bracket F'; the numbers of picks in a
given distance can be regulated to suit the class of goods being woven.
In order that the amount of cloth to be taken up may be regulated in the exact
proportion to the increase of cloth on bean, I pass rod N over length of piece beam
resting on the cloth. On one end of rod is fixed collar N', and on the other end I
fix lever P, having a boss acting as a collar. These collars are made to slide on
brackets N; and to lever PI attach a cord or chain P', which passes round small
pulley R over another pulley mounted on stud S, and is finally secured to weighted
lever H. As the cloth is wrapped round the piece beam this rod N is raised, and
consequently raises the weighted lever H nearer the stud S, thus gradually shortening
the traverse or stroke of levers and driving pawl K, and the distance revolved by
grooved wheel C at each separate pick.
In order to prevent the eccentric driving pawl actuating the grooved wheel C
when the weft is broken or used from off the bobbin in the shuttle I secure
lever T (the top end of which rests against the ordinary weft fork mechanism) to
the ordinary slackening rod T on the end nearest weft fork. On the other end
of rod T¹ I bx curved lever U. This last rained lever acting upon a stud fixed
in the side of driving pawl K raises the said pawl out of groove in pulley C when
actuated by weft fork mechanism, the wheel C being retained in its position by
bottom pawl M, so that no take up of the cloth can occur.
What I claim as my Invention is,-
The arrangement and combination of the several parts of mechanism for actuating
the grooved wheel C, substantially as and for the purposes described.
The arrangement and combination of the parts for regulating the amount of pick
in proportion to the increase in the diameter of the roll of cloth on the beam,
substantially as described.
The arrangement of slotted bracket F¹ in combination with rat tail Fº,
substantially as and for the purpose described.
The arrangement of the parts for liberating pawl K when the weft is broken,
substantially as described.
In witness whereof, I, the said Edwin Jackson, have hereunto set my hand
and seal, this Fifteenth day of August, in the year of our Lord One thousand
EDWIN JACKSON: (L.S.)