CERTAIn Improve- MENTS IN LOOMS FOR WEAVING
Year: 1870

page_text: LETTERS PATENT to John Storey Davies and Walter Edward Yates,
both of Manchester, in the County of Lancaster, for the Invention
W
COMPLETE SPECIFICATION filed by the said John Storey Davies and
Walter Edward Yates at the Office of the Commissioners of Patents,
with their Petition and Declaration, on the 11th August 1870,
pursuant to the 9th Section of the Patent Law Amendment Act,
1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOHN
STOREY DAVIES and WALTER EDWARD YATES, both of Manchester, in
the County of Lancaster, send greeting.
WHEREAS we are in possession of an Invention for "CERTAIn Improve-
MENTS IN LOOMS FOR WEAVING," and have petitioned Her Majesty to grant
unto us, our executors, administrators, and assigns, Her Royal Letters
Patent for the same, and have made solemn Declaration that we are the
first and true Inventors thereof.
NOW KNOW YE, that we, the said John Storey Davies and Walter
Edward Yates, do hereby declare that the following Complete Specifica-

page_text: tion, under our hands and seals, fully describes and ascertains the nature
of the said Invention, and in what manner the same is to be performed,
in and by the following statement and accompanying Drawings, that is
to say:
-
Our present Invention is designed for the purpose of effecting various
additional improvements upon Letters Patent previously granted to us
on the Twenty-eighth day of March, One thousand eight hundred and
seventy, No. 908, the first of which is for the purpose of arranging and
adapting to looms having ordinary weights and levers employed for
giving tension to the warp threads of the improved arrangement of
vibrating tension bars, described and set forth in our Specification
accompanying our before-recited Letters Patent, and which, as therein
described, were employed for regulating and governing the tension of the
warp threads as they were delivered from the beam.
To effect this arrangement to looms having the ordinary weights and
levers the whole of the apparatus governing and regulating the
intermittent tension of the warp in the manner and for the purpose
described in such Specification are in the present instance retained, with
the exception of the lower coupling spring, to which the cords or chains
passing around the drag pulleys of the warp beam were attached, in lieu
of which, and according to our present arrangement, such cords or chains
are attached and connected with the levers supporting moveable weights
in the ordinary manner.
Secondly. The Invention is designed for the purpose of providing an
additional apparatus in connection with the lower helical spring giving
tension to the warps, as described in the before-mentioned Specification,
that will enable the operative to relieve the warp threads of tension
when required for the purpose of recovering the "pick," or what is
termed " weaving back," and also to obtain the original tension on again
commencing to weave.
This part of our improvement consists in forming the attachment or
coupling between the back helical spring and the rope or chain passing
around one of the warp beam drag pullies by means of a hook link and
swivel lever having its fulcrum arranged upon the hook in such a
manner that when the lever connected by the link to the spring is
pulled over its centre into a position from the spring the required
amount of tension will be exerted upon the warp threads through the
medium of the spring ropes or chains and bars previously referred to;

page_text: but when it is required that the tension upon the warp threads shall be
temporarily relieved the lever is reversed into a position on the opposite
side of its centre, the action of which reduces the tension in order that
any float or other accident that has happened whilst weaving may be
remedied, upon the completion of which the ordinary tension can readily
be resumed by again placing the lever in its former position. This
arrangement of adjustable coupling may be modified to suit the various
circumstances or requirements of the loom to which the Invention may
be applied.
Lastly. The Invention relates to further improvements upon the reed,
forming the second claim of our former Specification before recited, and
in which was described and set forth a series of peculiarly formed dents
in which oval holes were formed top and bottom for the purpose of
placing them one by one on parallel bars with washers between them
for the purpose of spacing the whole when secured upon such bars by
means of screws or other equivalent composed the "reed" the subject
of the additional improvement consists in constructing the dent with
a recess or opening, top and bottom, in lieu of oval holes, by which
they can be readily slipped into their supporting parallel rods with-
out the necessity of removing any but the one that requires changing,
with this exception the arrangement and construction of the "reed" as
previously described is retained.
In order that the Invention may be better understood and explained
in detail, we have hereunto attached a Sheet of Drawings made upon
a scale of about three inches to the foot, similar letters of reference.
being marked upon corresponding parts on all the Figures alike.
Figure 1 represents a back elevation of the loom, shewing our improved
arrangement of vibrator tension regulators in combination with the
ordinary weights and levers employed for giving tension to the warps;;
Figure 2 represents a transverse section of the loom; Figure 3 represents
a detached portion of Figure 2, shewing the vibrating bars regulating
the tension of the warps, disconnected from the levers and weights,.
forming the medium through which the tension is transmitted to the.
warps.; Figure 4 represents an enlarged elevational view of the variable
coupling employed for connecting the ropes or chains with the helical
spring forming the medium through which tension is given to the
warps, as described in the Specification of Patent previously mentioned;
Figures 5 and 5ª represent a plan views of same, shewing the reverse

page_text: position; Figure 6 represents a full sized elevational view of a portion
of the improved "reed;" Figure 7 represents an end view of the same;
and Figure 8 represents a section of the "reed," shewing the side view of
the improved construction of dent."
65
Figures 1, 2, and 3 relate to the first part of these additional improve-
ments, in which a, a, is the framing of the loom; b, the top vibrating
bar; c, the bottom vibrating bar; d, d, the levers by which they are
connected to their fulcrum bar e, from which also project the arms or
brackets by which the connection is formed with the medium giving
tension to the warps, and are all parts previously described and referred
to in the Specification of Patent previously recited. The additional
improvement consists in connecting the ropes or chains I after passing
around the drag pullies of the warp beam h with the levers i, i, which
are weighted in the ordinary manner in Figure 3. The ropes or chains
are shewn as connected at the point with the frame a, in lieu of the
arms projecting from the fulcrum e of the levers supporting the vibrating
bars.
Figures 4, and 5, and 5ª relate to the second part of the additional
improvements in which is a hook connected to the rope or chain g,
forming the support and fulcrum for the lever m. A point on this hook
near the lever fulcrum is connected by means of the link m to one end
of the helical spring n; the opposite end of the lever m from its fulcrum
is supplied with a handle; thus, when the lever is turned into a position
from the spring, as shewn in Figure 5, the full tension required is
put by the expansion of the spring upon the warps.
When it is desired
to relieve the warps from tension for the purpose of " weaving back"
the handle is reversed into a position on the opposite side of its centre
or fulcrum, shewn at Figure 5ª, which allows the spring n to collapse,
thereby temporarily relieving the warps, the original tension of which
being again obtained on replacing the lever n in its first position.
Figures 6, 7, and 8 relate to the reed farming the third part of our
improvements, and consists in constructing the "dent," as seen in
Figure 8, with an opening top and bottom for the purpose of slipping or
placing the dents on the top and bottom parallel bars o, o, the space
or opening between them being formed by washers by constructing
dents. According to this form they are readily placed on or taken off
their parallel bars without disturbing any but the one that requires
removing.

page_text: Having now described the nature of our Invention forming the
additional improvements upon Letters Patent previously granted to us,
we would wish it to be distinctly understood in conclusion that we
claim,-
First. The employment and adaption to looms supplied with the
arrangement of vibrating bars regulating and governing the tension of
the warps during weaving, as previously claimed and described in our
previously recited Specification of Patent, No. 908, in the year of our
Lord One thousand eight hundred and seventy, of the ordinary weights
and levers as a medium for producing tension upon the warp threads, as
herein-before described and set forth.
Secondly. We claim the novel employment, use, and adaptation to the
apparatus forming the subject of our first Patent herein-before referred
to of a variable connection between the helical spring giving tension to
the warps and its connection with the rope or chain acting upon the
drag pulley of the warp beam, for the purpose and in the manner (or any
slight modification thereof) as herein-before described and set forth.
And, lastly. We claim the peculiar construction of the "dents"
forming the "reed," together with the general arrangement and con-
struction of the several parts forming the subject of these additional
improvements, as herein-before described, set forth, and fully illustrated
in the accompanying Drawings.
In witness whereof, we, the said John Storey Davies and Walter
Edward Yates, have hereunto set our hands and seals, this
Tenth day of August, in the year of our Lord One. thousand eight
hundred and seventy.
Witness,
(L.S.)
JOHN STOREY DAVIES.
WALTER EDWARD YATES. (L.S.)
THOMAS WRIGLEY,
Agent to the Petitioners,
Imperial Chambers,
.
Manchester.