An improved Link Motion for Rising Boxes in Looms for Weaving.
Year: 1888

page_text: Date of Application, 31st Oct., 1888
Complete Specification Left, 30th July, 1889-Accepted, 7th Sept.,
1889
PROVISIONAL SPECIFICATION.
An improved Link Motion for Rising Boxes in Looms for
Weaving.
1 JOHN LEWIS BYROM of Slackcote Mills, Delph near Oldham in the County of
York Woollen Manufacturer do hereby declare the nature of this invention to be as
follows
This invention relates to the shuttle box motion of looms for weaving and more
especially to what are known as Hollingworth and Knowles looms, and similar looms
wherein the shuttles are controlled by a pattern chain provided with bowls or discs
upon which rest a series of levers or jacks carrying toothed wheels which gear
with an upper or a lower driving wheel according as the levers or jacks are raised
or not by the pattern chain.
The object of my invention is to dispense with a number of the links and bowls
of this chain. which has hitherto been necessarily of great length when weaving
patterns for which the shuttle requires to be changed frequently and irregularly for
a certain time and then to remain unchanged or to change often and regularly;
for example when weaving the cross border of a shawl or large checks or stripes.
For this purpose I mount two or more chains upon a pattern barrel or barrels
capable of sliding on the barrel shaft so that it can when desired be moved beneath
the levers or jacks aforesaid.
The latter are raised when a change of pattern chain is to be effected by a
sliding bar which is beneath the ends of the levers and is provided with an inclino
or inclines which act against a fixed stud or projection to raise the said bar and
the levers so that the pattern chains can be moved beneath them.
The pattern barrels are preferably connected together so as to move simultaneously
and are provided with suitable means for fixing them in position upon the shaft.
201 1
1000
GEORGE DAVIES,
4, St. Ann's Square, Manchester, Agent for the Applicant.
COMPLETE SPECIFICATION.
An Improved Link Motion for Rising Boxes in Looms for
Weaving.
1 JOHN LEWIS BYROм of Slackcote Mills Delph near Oldham in the County of
York Woollen Manufacturer do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
This invention relates to the shuttle box motion of looms for weaving and more
especially to what are known as Hollingworth & Knowles' looms, and similar looms
wherein the shuttles are controlled by a pattern chain provided with bowls or discs
upon which rest a series of levers or jacks carrying toothed wheels which gear with
an upper or a lower driving wheel according as the levers or "jacks" are raised or
not by the pattern chain.
The object of my invention is to dispense with a number of the links and bowls of
this chain which has hitherto been necessarily of great length when weaving patterns
for which the shuttle requires to be changed frequently and irregularly for a certain
time and then to remain unchanged or to change often and regularly, for example
when weaving the cross border of a shawl or large checks or stripes.

page_text: In order that my invention may be clearly understood I have annexed hereunto
a sheet of drawings illustrative thereof, and have marked the same with figures
and letters of reference corresponding with those in the following description.
Fig. 1 is a sectional elevation of so much of the ordinary link motion above
mentioned as is necessary to illustrate the application of my invention thereto..
Fig. 2. is a plan view of the same and Fig. 3 a sectional view taken through about
the line A. B on Fig. 1.
In carrying out my invention I mount two or more chains a, a¹ (see Fig. 2)
upon a pattern barrel or barrels b, b' capable of sliding on the barrel shaft c so that
it can when desired be moved beneath the levers or jacks d aforesaid.
The drawing shows two chains a, a¹; if three chains are required the bearing e
of the barrel shaft c will be made of such a form as to allow room for the third
barrel.
The jacks d are raised when a change of pattern chain is to be effected by a sliding
bar which is beneath the ends dx of the levers d and is provided with an incline or
inclines each of which when the bar f is drawn outwards acts against a fixed
stud or projection g to raise the said bar and the levers d so that the pattern
chains a, a can be moved beneath them.
The pattern barrels b, are preferably formed or connected together so as to
move simultaneously and are provided with suitable means for fixing them in position
upon the shaft.
In the arrangement shown on the drawing one end of the pattern barrel is provided
with a boss having a circumferential groove in which is engaged a fork attached to
or forming part of a block i which slides on a square or other bar k. This block i is
provided with a set screw with a cross or other convenient handle, so that the screw
can be easily slackened.
The pattern barrel then slid along the shaft until the desired pattern chain is
brought under the levers or jackets & when a slight turn of the screw will fix the
same in the required position.
The jacks are then brought down by sliding the bar f inwards and the weaving
can then proceed at once.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what
I claim is :-
First. The improved link motion for rising boxes in looms for weaving consisting
in the combination together of two or more short pattern chains and barrels side by
side upon one shaft arranged (substantially as herein before described and illustrated
by the annexed drawings) so that they can slide end wise upon the said shaft so as to
bring the required pattern chain beneath the "jacks."
Secondly. I claim the sliding lever with inclined slots acting on fixed pins for the
purpose of raising the "jacks" simultaneously whilst the pattern chains are being
changed, and lowering them again into working order.
Dated this 29th day of July 1889
GEORGE DAVIES,
4, St. Ann's Square, Manchester, Agent for the Applicant.