Improvements in Mechanism for the Formation of Loop Cloth in Looms for Weaving.
Year: 1897

page_text: Date of Application, 11th Nov., 1897
Complete Specification Left, 4th Aug., 1898-Accepted, 1st Oct., 1898
Improvements in Mechanism for the Formation of Loop Cloth in
Looms for Weaving.
We, THOMAS HYDE, of Derby Street Mill, Colne, in the County of Lancaster,
Cotton Manufacturer and MICAII HODGSON, of 47, Derby Street, Colne aforesaid,
Foreman Overlooker, do hereby declare the nature of this invention to be as
follows:-
This invention relates to certain improved mechanism for the formation of
what is known as loop cloth in looms for weaving; a small loop being formed
in the cloth at intervals by the warp threads from a second or supplementary
warp beam. A dobby has hitherto been usually employed to effect this result.
In carrying our invention into effect, we bolt to the top rail of a loose reed
loom, a L bracket, and mount on a stud at the bent portion thereof a toothed
quadrant.
This quadrant is operated tooth by tooth by a catch, which takes up a tooth
for every two picks in the loom. This catch is actuated by what is known as
the "pump" in the change box mechanism. On a stud on the L bracket is a
retaining catch, which is held in gear with the teeth of the quadrant by a spring.
When the quadrant has been drawn forward in the manner described for a certain
distance, a small lug on the quadrant raises a lever, causing it to bear against
the retaining catch, and disengaging it from the teeth of the quadrant.
On the quadrant is also a short stud, upon which the arm of the back bearer
of the loom rests. Now when the retaining catch has been disengaged from the
teeth of the quadrant as aforesaid, the weight of the quadrant and the pressure
of the arm of the back bearer cause the quadrant to fall back the whole number
of teeth, which have been taken up, a small projection on the quadrant again
determining the fall.
The said arm or lever, which disengages the retaining catch from the teeth
of the quadrant is connected by a wire rod to one extremity of a two armed
lever mounted on the loom. Attached to the other extremity of the said two
armed lever is a cord or wire, whose other end is attached to a slotted piece of
buffalo hide or the like, which is slipped over the end of a knife or lever having
a snecked end. This knife or lever is pivotted to the reed rail of the loom, and
moves with it; its snecked end working to and fro in a slotted bracket fixed
to the loom.
So long as the toothed quadrant is being operated tooth by tooth by the catch
actuated by the "pump" as aforesaid, the snecked end of the lever is held free
of the slot in the bracket by the cord and slotted attachment as described, but
the moment the lever, which disengages the retaining catch, is raised by the lug
on the quadrant, the wire connection to it has the effect of raising one extremity
of the two armed lever, and depressing its other end. By this means the knife
suspended by the cord and slotted attachment is lowered, and its snecked end
engages with the slot of the bracket,

page_text: On the backward movement of the loom slay, the knife draws forward the
reed rail, and by such action relieves the reed, which remains in the shed, and
fails to beat up the weft. Simultaneously with this movement, the toothed
quadrant being free by the disengagement of the retaining and taking-up catches
falls to its original position and the short stud cast to it lowers the back bearer
of the loom, thereby causing a slack shed of the warp threads of the second or
supplementary warp beam. The retaining catch becoming re-engaged with the
teeth of the quadrant, the small lever, which lifted it, falls, and by its connections
raises the snecked end of the knife from the slotted bracket.
.
By the next return movement of the slay the reed reassumes its correct
position, and at the same time not only beats up both picks, but also takes up
the slack shed of the supplementary warp, thus producing the loop formation..
We wish it to be understood that our apparatus may be operated by a dobby
instead of by change box mechanism,
Dated thin 10th law of Nazamhan 100%
RICHMOND & Co.,
Agents for the Applicants, 12, Standish Street, Burnley.
Improvements in Mechanism for the Formation of Loop Cloth in
Looms for Weaving.
We THOMAS HYDE, of Derby Street Mill, Colne, in the County of Lancaster,
Cotton Manufacturer and MICAH HODGSON, of 47, Derby Street, Colne aforesaid,
Foreman Overlooker, 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:-
This invention relates to certain improved mechanism for the formation of
what is known as loop cloth in looms for weaving; a small loop being formed
in the cloth at intervals by the warp threads from a second or supplementary
warp beam. A dobby has hitherto been usually employed to effect this result.
In carrying our invention into effect, we bolt to the top rail of a loose reed
loom a bracket, and mount on a stud at the bent portion thereof a toothed
quadrant.
This quadrant is operated tooth by tooth by a catch, which takes up a tooth
for every two picks in the loom. This catch is actuated by what is known as
the pump in the change box mechanism. On a stud on the L bracket is a
retaining catch, which is held in gear with the teeth of the quadrant by a spring.
When the quadrant has been drawn forward in the manner described for a certain
distance, a small lug on the quadrant raises a lever, causing it to bear against
the retaining catch, and disengaging it from the teeth of the quadrant.
On the quadrant is also a short stud, upon which the arm of the back bearer
of the loom rests. Now when the retaining catch has been disengaged from the
teeth of the quadrant as aforesaid, the weight of the quadrant and the pressure
of the arm of the back bearer cause the quadrant to fall back the whole number
of teeth, which have been taken up, a small projection on the quadrant again
determining the fall.
The said arm or lever, which disengages the retaining catch from the teeth
of the quadrant is connected by a wire rod to one extremity of a two armed
lever mounted on the loom. Attached to the other extremity of the said two
armed lever is a cord or wire, whose other end is attached to a slotted piece of

page_text: buffalo hide or the like, which is slipped over the end of a knife or lever having
á snecked end. This knife or lever is pivotted to the reed rail of the loom, and
moves with it; its snecked end working to and fro in a slotted bracket fixed
to the loom.
33
So long as the toothed quadrant is being operated tooth by tooth by the catch
actuated by the " pump' as aforesaid, the snecked end of the lever is held free
of the slot in the bracket by the cord and slotted attachment as described, but
the moment the lever, which disengages the retaining catch, is raised by the lug
on the quadrant, the wire connection to it has the effect of raising one extremity.
of the two armed lever, and depressing its other end. By this means, the knife
suspended by the cord and slotted attachment is lowered, and its snecked end
engages with the slot of the bracket.
On the backward movement of the loom slay, the knife draws forward the
reed rail, and by such action relieves the reed, which remains in the shed, and
fails to beat up the weft. Simultaneously with this movement, the toothed
quadrant being free by the disengagement of the retaining and taking up catches
falls to its original position, and the short stud cast to it lowers the back bearer
of the loom, thereby causing a slack shed of the warp threads of the second or
supplementary warp beam. The retaining catch becoming re-engaged with the
teeth of the quadrant, the small lever, which lifted it, falls, and by its connections
raises the snecked end of the knife from the slotted bracket.
By the next return movement of the slay, the reed re-assumes its correct
position, and at the same time not only beats up both picks, but also. takes up
the slack shed of the supplementary warp, thus producing the loop formation.
We wish it to be understood, that our apparatus may be operated by a dobby
instead of by change box mechanism.
In the accompanying drawings,
Fig. 1 is a side elevation, and Fig. 2 a front elevation of our improved
mechanism for the formation of loop cloth in looms for weaving.
Referring to Fig. 1, A is the toothed quadrant mounted at the bend of the L
bracket B. The toothed quadrant A is operated tooth by tooth by the actuating
catch C, which is suspended from a stud C₁ on the lever D. This lever is
actuated by what is known as the pump or box lifter rod in the change box
mechanism, and the quadrant A is moved one tooth during every two or more
picks in the shed. The actuating catch C is held in the teeth of the quadrant by
a spring E. On the stud F on the L bracket B is retaining catch F¹, held in
gear with the teeth of the quadrant by a spring as shewn.
In this way the quadrant is drawn forward for a certain distance, until a
small lug or pin G fixed or cast to it comes against and raises lever G¹ pivotted
to the bracket, and causes the said lever or a projection thereon to bear against
the retaining catch F¹, and disengage it from the teeth of the quadrant A.
The arm H of the back bearer of the loom rests upon another small stud H',
and when the retaining catch has been disengaged as aforesaid, the pressure of
the back bearer and the weight of the quadrant causes the latter to fall back the
whole number of teeth which have been taken up, the fall of the quadrant being
determined by the small lug or pin J.
To the lever G¹, a wire or rod K is connected, its other end being attached
to a two armed lever L (see Fig. 2) mounted on the loom. To the other extremity
of the said two armed lever L is suspended by means of cord M a slotted piece
of buffalo hide or the like M, which is slipped over the end of a knife or lever N
having a snecked end N¹ (see Fig. 1). This knife or lever is pivotted to the
reed rail of the loom, its snecked end working to and fro in the slotted bracket ()
fixed to the loom.
The snecked end N¹ of the knife or lever N is thus held free to move in the
slot of the bracket O by the cord and slotted attachment M while the toothed
quadrant is being turned tooth by tooth as described, until the lever G¹ is raised
by the lug or pin G on the quadrant, which thereby not only disengages the

page_text: retaining catch F¹, but also raises one extremity of the two armed lever L. This
has the effect of depressing the other end of the said lever, so as to lower the
snecked end N¹ of the knife N, and cause it to engage with the slot of the
bracket O.
Consequently with the backward movement of the slay, the said knife N being
held fast by its snecked end N¹ in the slot of the bracket O draws forward the
reed rail Q, and the reed fails to beat up the weft. Being disengaged from the
actuating, and retaining catches, the toothed quadrant at the same time falls
to its original position, and the short stud H cast to it lowers the back bearer
of the loom, causing a slack shed in the warp threads of the second or supple-
mentary warp beam P.
The reed with the return movement of the slay becomes locked in position by
the slav forcing the reed rail Q against the weight or pressure of the knife N
(which bears upon it), and besides beating up both picks, also takes up the slack
shed of the supplementary warp, thus producing the loop formation.
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:
-
1. The improved mechanism for the formation of loop cloth in looms for
weaving, substantially as described and illustrated in the accompanying
drawings.
2. The toothed quadrant A actuated as described in combination with means.
for freeing the reed, and also lowering the back bearer of the loom to 'cause a
slack shed, substantially as described and illustrated.
Datad in 00h 1 of Tule 1908
RICHMOND & Co.,
Chartered Patent Agents, 12, Standish Street, Burnley.