Improvements appertaining to Loom Shedding Mechanism.
Year: 1898

page_text: Date of Application, 23rd Aug., 1898
Complete Specification Left, 23rd May, 1899-Accepted, 15th July, 1899
PROVISIONAL SPECIFICATION.
Improvements appertaining to Loom Shedding Mechanism.
We, JOSEPH BROWN, of 23, Moss Street, Holy Croft, Keighley, in the County of
York, Mechanic, and FRANK SCOTT, of 3, Third Avenue, Victoria Road, Keighley,
aforesaid, Mechanic, do hereby declare the nature of this invention to be as
follows, that is to say:-
Relative to the first part of our invention, in connection with
certain of the forms in which the shedding mechanism for looms known as the
"Keighley dobby" is produced, the operating catches therein are put into and
out of action by the pattern mechanism through the medium of needles or lifting
bars in which clongated slots or eyes are made for said catches to pass through.
Heretofore these needles have been formed either by two strips of metal being
rivetted together or by being made of cast metal, in the former case they are
very liable to become damaged by use so that they are rendered almost inope-
rative, while in the latter case they are clumsy, unsightly, and very fragile; to
obviate these disadvantages and produce needles or bars that shall be durable,
efficient and less liable to become inoperative, is the object of this invention.
This invention we attain by taking a strip of metal (preferably of mild sheet
steel) of the desired width and length and folding same lengthwise upon itself,
thus the whole length of the strip is of double thickness.
We then separate one part of the strip from the other in those positions on
same where the loops are to be formed, by which means said loops are produced
and yet the parts of the needle between and extending beyond same are integ-
ral and so are undetachable and firm without requiring any rivets or other
holding means or devices for securing one to the other.
This method of construction may also be followed in the production of needles
wherein the outer ends have to be formed broader for the operating catches to
rest upon at one end or for the lever or parts that transmit motion to the said
needles to come in contact with at the other end. These parts being produced
by the strips of folded metal being split down at one or at both of its ends, and
then by each side being bent over laterally to form the desired increased size of
outer end, or still further one or other of these ends may be bent to form a
bifurcation to receive the catch or its operating lever as desired.
Respecting the second part, of our invention we make use of similarly slotted
needles in connection with those "Keighley dobbies" wherein a series of levers
intervenes between the "peg-lag" mechanism and said needles, but instead of
forming the slots in position therein for the dobbies' operating catches to pass
through, these catches are made to pass over the outer ends of the slotted needles
while one arm of each interceding lever above referred to is made to pass
through the slot made in such needle at the proper place or position for it so
to do, by which means whenever the pegs on the pattern barrel come into con-
tact with the interceding levers these latter are moved to force their respective
needles to descend so that the inconvenience and damage heretofore done to the
pieces being woven by reason of said needles being held by friction from
descending when their pattern barrel indicated for them to be put into opera-
tion is entirely avoided

page_text: The slotted needles used as described by the second part of our invention,
are constructed in the manner herein first before described.";
Dated this 22nd day of August 1898.
Improvements appertaining to Loom Shedding Mechanism.
We, JOSEPH BROWN, of 23, Moss Street, Holy Croft, Keighley, in the County of
York, Mechanic, and FRANK SCOTT, of 3, Third Avenue, Victoria Road, Keighley,
aforesaid, Mechanic, 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, that is to say:-
Relative to the first part of our invention, in connection with
certain of the forms in which the shedding mechanism for looms known as the
"Keighley dobby" is produced, the operating catches therein are put into and
out of action by the pattern mechanism through the medium of needles or lifting
bars in which elongated slots or eyes are made for said catches to pass through.
Heretofore these needles have been formed either by two strips of metal being
rivetted together or by being made of cast metal, in the former case they are
very liable to become damaged by use so that they are rendered almost inope-
rative, while in the latter case they are clumsy, unsightly and very fragile. To
obviate these disadvantages and produce needles or bars that shall be durable,
efficient and less liable to become inoperative, is the object of this part of our
invention.
Respecting the second part of our invention we make use of means hereinafter
described whereby the needles or lifting bars are positively operated so as to
avoid any possibility of their being held from falling so as to cause."mislifts'
or inaccurate working of the heddles.
دو
In order that our said invention may be readily understood, we have hereunto
appended sheets of drawings illustrative thereof in which:-
Fig. 1 is a sectional elevation of a sufficient portion of a dobby to show the
application thereto of our improved form of needle forming the first part of
our invention.
Figs. 2, 3, 4, 5 and 6 are side and front elevations, enlarged scale, illustrating
the formation or construction of our said improved needle under varied forms
during its production.
Fig. 7 is a sectional end elevation (drawn to a greatly enlarged scale) of our
improved needle.
Fig. 8 is a side elevation of a dobby showing the application thereto of the
improved form of needle constituting the second part of our invention.
Figs. 9 and 10 are detail drawings, same scale as Figs. 2 to 6, of the improved
form of needle illustrated in Fig. 8.
Fig. 11 is an end view (drawn to a greatly enlarged scale) of the needle or
bar shown by Figs. 9 and 10.
Similar letters and figures of reference indicate similar parts throughout the
several views.
We attain the object of our invention by taking a strip of metal as shown
at a Fig. 2, and preferably of mild sheet steel, of the desired width and length
and folding same lengthwise upon itself as shown by Figs. 3 and 7, thus the
whole length of the strip a is of double thickness, as shown by sectional drawing
Fig. 7.

page_text: We then cut the folded edge and separate one part a¹ of the strip a from the
other a² in those positions on same where the loops a³ (through which take the
catches b 6) are required, by which means said loops a³ are produced and yet
the parts of the needle a between and extending beyond same are integral and
so are undetachable and firm without requiring any rivets or other holding
means or devices for securing one to the other.
This method of construction may also be followed in the production of needles
wherein the outer ends have to be formed broader for the operating catches b to
rest upon and not to take within as shown by Fig. 1, or for the lever c moved
by the pattern chain d (or other parts that may be employed to transmit motion
to the needles a) to come in contact with, as shown by Fig. 1. These parts are
produced by the strip of folded metal a being split down at one or both of its
ends as may be required, and then by each side being bent over laterally as
shown at a Fig. 5, to form the desired increased size of outer end. Further,
one or both of the outer ends of the needle a may be bent to form a bifurcation a³
(see Fig. 6) to receive the catch b or the lever c as may be desired.
As to the second part of our invention we make use of needles e similarly
slotted as at e¹ in connection with those "Keighley dobbies" wherein a series
of levers 9 intervenes between the "peg-lag" mechanism h and said needles e,
but instead of forming the slots in position therein for the dobbies' operating
catches to pass through as is the case with the needles a above described, these
catches are made to pass over the outer ends of the slotted needles e (these
outer ends being preferably constructed by the sheet metal being folded round
a central pink as shown by Fig. 11) while the arm g¹ of each interceding
lever g is made to pass through the slot e¹ by which means whenever the pegs
on the pattern barrel come into contact with the interceding levers g, these
latter are moved and bring down their respective heddles so as to leave the
catches free to fall into contact with their draw-bar m in order to operate their
respective heddles, so that the inconvenience and damage heretofore done to the
pieces being woven by reason of said needles e being held by friction from
descending when the pattern barrel indicated for them to be put into operation
is entirely avoided.
The needles e and the slots e¹ are constructed in the same manner as are the
needles a and slots a³ above described.
Instead of forming the outer ends of the needles a and e which bear against
the catches or f as shown by Fig. 5, they may be formed of circular shape
in cross section as shown at 2, Figs. 9 and 10, and in such cases the circular
part is produced by the sheet metal being folded around a central core k if
desired.
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. Needles or lifting bars for use in loom shedding mechanism, the same being
constructed substantially as herein specified.
2. Needles or lifting bars for use in loom shedding mechanism, the sanie
being constructed and arranged to operate substantially as herein specified.
Doted this 2nd law 1900