Improvements in Apparatus for Cutting or Splitting Double Pile Fabrics in the Loom.
Year: 1894

page_text: Date of Application, 30th Jan., 1894
Complete Specification Left, 29th Oct., 1894-Accepted, 1st Dec., 1894
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Cutting or Splitting Double Pile
Fabrics in the Loom.
We THOMAS WATSON & SONS (Rochdale) LIMITED, and WILLIAM DOBSON
WATSON, both of Horse Carrs Silk Mill, Rochdale, in the County of Lancaster,
Manufacturers, do hereby declare the nature of this invention to be as follows:-
This invention relates to apparatus for cutting or splitting double pile fabrics as
they are woven in the loom, and especially to that class of apparatus which consists
of a knife attached to a small carriage driven rapidly to and fro across the width
of the piece, and cutting the pile which connects the two backs of the fabric
together; and the object of the said invention is to obtain easily driven and simple
mechanism for imparting the requisite motion to the knife, instead of using
reversing drums or pulleys, or a rack and pinion, as hitherto, and thereby causing
a great deal of unnecessary friction or breakage of parts in actuating the said knife
which is of itself very light and easily moved.
For this purpose we attach a cord to each side or end of the carriage, and we fix
the other end of each cord to or near to the free end of a lever which is caused to
rock on a suitable fulcrum by means of a heart-cam and bowl similar to those
employed on the loom for actuating existing knife motions.
The rocking of this lever causes the knife to move to and fro in its race and as
it is not possible to make this lever long enough to obtain the required length of
traverse we carry the cord from one end or side of the knife carriage over an idle
pulley fixed to the frame of the loom and then under a pulley mounted on the lever
aforesaid and finally over a pulley fixed to the loom side to its attachment to the
lever. The cord from the other side of the knife carriage is carried round a pulley
at the other end of the knife race and then round idle pulleys, preferably near to
the ground or floor, and back to the lever, passing however up from the last guide
pulley over a second pulley on the lever, or a second groove on the pulley first
named on the lever; thence the cord is passed down below an idle pulley fixed to
the loom side and up to its attachment to the loom.
The traverse of the end of the rocking lever is thus multiplied, and the knife
will go further and more rapidly than the said end of the lever; and this motion
will be found to work very smoothly and very easily and without tendency to
breakdown, besides being most simple and economical in its application even to
existing looms.
If less traverse is required the ends of the cords may be attached to the loom
side instead of passing over the last pulley on the loom side and being attached to
the lever, or they may pass over another pulley or pair of pulleys on the lever if
more traverse is required, according to the length of the rocking lever and its
motion.
By these means we are enabled to actuate the cord of the knife carriage directly
by the cam and lever without any intermediate gearing.
It will be evident that our invention is applicable to all widths of loom, but it is
especially advantageous when applied to very broad looms.
Dated this 29th day of January 1894.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicants.

page_text: Improvements in Apparatus for Cutting or Splitting Double Pile
Fabrics in the Loom.
We THOMAS WATSON & SONS (Rochdale) LIMITED, and WILLIAM DOBSON
WATSON both of Horse Carrs Silk Mill, Rochdale in the County of Lancaster,
Manufacturers, 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 apparatus for cutting or splitting double pile fabrics as
they are woven in the loom, and especially to that class of apparatus which consists
of a knife attached to a small carriage driven rapidly to and fro across the width
of the piece, and cutting the pile which connects the two backs of the fabric
together; and the object of the said invention is to obtain easily driven and simple
mechanism for imparting the requisite motion to the knife, instead of using
reversing drums or pulleys, or a rack and pinion, as hitherto, and thereby causing
a great deal of unnecessary friction or breakage of parts in actuating the said knife
which is of itself very light and easily moved.
In order that our invention may be clearly understood we have annexed hereto
two sheets of drawings illustrative thereof, and have marked the same with figures
and letters of reference corresponding with those in the following description
thereof.
Fig. 1 is a side elevation, partly in section, of so much of a loom used for the
weaving and severing of double piled fabrics as is necessary to illustrate our
invention. Fig. 2 is a front elevation thereof, and Fig. 3 is a plan of part of the
front end of the loom.
a is the frame of the loom, b the knife, and c the carriage moved to and fro as
usual in the race path or groove d.
For this purpose we attach a cord c¹² to each side or end of the carriage c, and
we fix the other end of each cord c³ c² to, or near to, the free end of a lever e which
is caused to rock on a suitable fulcrum e¹ by means of a heart cam f and bowle
similar to those employed on the loom for actuating existing knife motions.
The rocking of this lever e causes the knife b to move to and fro in its path d,
and as it is not possible to make this lever e long enough to obtain the required
length of traverse, we carry the cord c¹ from one end or side of the knife carriage c
over an idle pulley g fixed on the frame of the loom and then under a pulley g₁
mounted on the lever e aforesaid, and finally over a pulley 92 fixed on the loom
side a to its attachment (at c³) to the lever e. The cord c from the other side of
the knife carriage c is carried round a pulley h at the other end of the knife path d,
and then round idle pulleys h' h preferably near to the ground or floor, and back
to the lever e passing however up from the last guide pulley 2 over a second pulley
on the lever e, or a second groove on the pulley g' on the lever e as shewn; thence
the cord is passed down below an idle pulley ³ fixed on the loom side a, and up
to its attachment to the lever e at c³.
On the drawings the arrow heads indicate the direction of motion of the
cords c¹ while the lever e is rising.
The traverse of the end of the rocking lever e is thus multiplied, and the knife b
will go further and more rapidly than the said end of the lever e; and this motion
will be found to work very smoothly and very easily and without tendency to
breakdown, besides being most simple and economical in its application even to
existing looms.
If less traverse is required, the ends of the cords c¹ c² may be attached to the
loom side, instead of passing over the last pulley g² or h³ on the loom side and
being attached to the lever e; or they may pass over another pulley or pair of

page_text: pulleys on the lever e if more traverse is required, according to the length of the
rocking lever and its motion.
By these means we are enabled to actuate the cord of the knife carriage directly
by the cam fand lever e without any intermediate gearing.
It will be evident that our invention is applicable to all widths of loom, but it is
especially advantageous when applied to very broad looms.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
The combination of the carriage of a knife for splitting double piled fabrics in
the loom, with cords, pulleys, lever, and cam, substantially as and for the purposes
herein before described.
Dated this 27th dow of October 1901
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicants.