Improvements in Warp Stop Motions for Looms.
Year: 1890

page_text: Date of Application, 18th Oct., 1890
Complete Specification Left, 20th July, 1891-Accepted, 3rd Oct., 1891
PROVISIONAL SPECIFICATION.
Improvements in Warp Stop Motions for Looms.
I, EDWARD SMITH, of 8 Brook Street, Bradford, in the County of York,
Manufacturers' Agent, do hereby declare the nature of this invention to be as
follows:-
--
This invention relates to certain improvements whereby looms may be auto-
matically stopped, and has for its object, the arrangement and combination with
looms, of a suitable apparatiis adapted to the requirements of the same and con-
structed in such a manner that, the loom will be automatically stopped when a warp
thread breaks.
I accomplish my object in the following manner:-1 mount in a suitable position
behind the healds or jacquard threads, a series of detector plates, each plate having
two slot holes therein through each of which a warp thread passes, the tension of
which retains the plates in an elevated position.
To the lay beam of the loom are secured two or more brackets having a rod
passing through same or studs secured thereto for supporting one end of a bar, the
opposite end of each bar being carried by any suitable support which will allow
the bars to reciprocate, and near to the end or in some convenient portion of the
said bars, is hinged a narrow bar extending the entire distance between the before
mentioned bars.
To the lay beam are attached one or more brackets for supporting a short shaft
to which are secured two arms-one extending some distance towards the back of
the loom, the outer end being carried by the before mentioned bar, the other aim
extending in the opposite direction; or in lieu of these arms a lever may be utilized
one end of which is slightly heavier than the other.
Should any warp thread break, the detector will descend some distance and
come in contact with the before mentioned narrow bar, and by the reciprocating
motion of the latter, the detector will cause it to turn on its bearings and the arms
or lever to move into such position that, on the return of the lay beam towards
the front of the loom, the end of an arm or lever will come in contact with some
portion of what is commonly known as the "knock off handle" and liberate the
same so as to stop the loom.
Dated this 17th day of October 1890.
JOHN WAUGH,⠀
Agent.
COMPLETE SPECIFICATION.
Improvements in Warp Stop Motions for Looms.
I, EDWARD SMITH of 8 Brook Street, Bradford, in the County of York,
Manufacturers' Agent, 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 has for its object, the arrangement and combination with looms
for weaving textile fabrics of certain mechanism whereby the loom is automatically
stopped when a warp thread breaks.
In the accompanying drawings
Fig. 1. represents a section of a loom through line a. b. in Fig. 3.
the loom not necessary for the elucidation of my invention are not
apparatus may be fitted to any loom of ordinary construction.
The parts of
shown as the

page_text: Fig. 2. is an end view of certain portions of a loom with part of the end frame
cut away.
Fig. 3. is a plan.
Figs. 4. and 5. detached details of the apparatus.
Fig. 6. a detail side elevation of one of the bars for retaining the dividing rods
in the position required and
Fig. 7. a diagram plan of a detector plate showing the manner in which the
warp threads are passed through the same.
I accomplish my object by mounting in a suitable position behind the healds or
other warp thread operating device actuated and mounted in the ordinary manner,
a series of detector plates, each plate having two slots therein, through each of
which a warp thread passes, the tension of the warp threads retaining the respective
detector plates in an elevated position in such a manner that, when a warp thread.
breaks, the support at one end of the plate is removed, therefore the detector plate
descends some distance into such position for the end to come in contact with a
transverse bar and thus operate the same and connections therewith, so that, the
driving belt is moved from one pulley to another thereby stopping the loom.
To the lay beam A. of the loom are secured two brackets B. B. to which are
hinged the respective rods C. C. made adjustable as regards length at D. the
opposite ends of the rods being carried by supporting upright bars E. E. arranged
so as to allow the rods C. to reciprocate therein. Near the outer end of said rods
is mounted on stud or trunnion pins F. a narrow transverse bar G. which extends
the entire distance between the rods C. C. and is kept in an elevated position
somewhat as shown by Figs. 1. 2. and 4. by the upper edge of one end of the
same engaging with an indent in the upper rod K. and is held therein by a spiral
spring H. attached to the upper and lower rods.
To the opposite side of the lay beam A. is secured a bracket J. for supporting
one end of the upper rod K. jointed thereto by a shaft L. passing through same,
to which the rod K. is secured. To the said shaft and near to one end of the lay
beam in addition to the upright arm of the rod K. is attached an arm M. adjustable
as regards length at M' which reciprocates along with the lay beam A. rods C C.
and K. attached thereto, and when the narrow transverse bar G. is dislodged by a
detector plate P. in the manner as herein before described, the support at one end
of the upper rod K. is removed, so that the outer end drops to the position shown
by Fig. 5. thereby operating the shaft L. a certain distance in its bearings and
elevating the end of arm M. into a position somewhat as shown by Fig. 5. thus
bringing the end at M² opposite à block N. secured to the ordinary stop or
knock off handle O. of the loom, attached to the belt fork R¹ in the ordinary
manner.
The detector plates P. are supported between the dividing rods Q: by the warp
threads W. one warp thread passing through a slot at one end of the plate, and
another warp thread through the slot at the other end of the plate in the manner
indicated by diagram plan Fig. 7. so that, should any warp thread break, the
support at one end of the plate is removed, which will then drop one way or the
other according to the end released by the broken warp thread to the position
shown by Fig. 5. one end being down in contact with one of the dividing rods Q.
and the other end elevated but in contact with the other dividing rod, so that,
by the dividing rods Q. with the detector plates P. between same being held
secure by rods R2 R2 secured to back rail T. or other cross beam of loom, and the
rods C. and K. and narrow transverse bar G. reciprocating, the upper edge of the
said bar will come in contact with the released and fallen end of the detector plate,
thereby causing the narrow transverse bar G. to turn on its trunnions or studs F.
and fall to the position shown by full lines when the relieved detector plate is in
the position shown by full lines: or if the opposite end of a detector plate be
released by the breakage of its supporting warp thread, it will fall to the position
shown by dotted lines, thus by these means of removing the support to the upper
rod K. the shaft L. is operated in its bearings and the arm M. elevated so that, the

page_text: end of same at M2 is in the position that, when the reed secured in the lay beam A.
in the ordinary manner, is beating up the weft, the end of arm will come in contact
with the block N. secured to the knock off handle O. and operate them in the
direction of the arrow such a distance that, the knock off handle O. is moved out
of the ordinary retaining notch R. as shewn in detail by Fig. 8. thus liberating
the said handle of the ordinary well known construction the bottom portion of
which is attached to the loom end frame V. as shewn by Fig. 9. so that when
liberated, the flat bar curved spring S. forming part of said handle will cause the
same to move to the position shewn by dotted lines, thereby operating the belt
fork R¹ and transferring the belt from the fast to the loose pulley of the loom,
thus automatically stopping the latter whenever a warp thread is broken.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In combination with the lay beam A. of a loom, the rods C. and K. narrow
transverse bar G. arm M. block N. and knock off handle O. all arranged sub-
stantially in the manner and for the purpose as hereinbefore set forth.
2. The detector plates P. supported by the warp threads between the dividing
rods Q. in combination with the rods C. and K. lay beam A. arm M. block N.
knock off handle O. and belt fork R' all arranged substantially in the manner and
for the purpose, hereinbefore set forth.
3. In a loom a series of detector plates P. supported by warp threads above a
reciprocating bar mounted in such a manner as to be displaced and automatically
stop the loom whenever a warp thread breaks.
4. Detectors placed between two dividing rods Q. each detector being supported
by two warp threads for the purpose as hereinbefore set forth.
Dated this 17th day of July 1891.
JOHN WAUGH,
Agent.