IMPROVEMENTS IN ROTARY GILL APPARATUS FOR TREATING JUTE AND LIKE FIBROUS SUBSTANCES
Year: 1877

page_text: In the Matter of Letters Patent granted to WILLIAM PARELL BUTCHART
and JAMES FOOTE BUTCHART, both of Dundee, in the County of Forfar,
North Britain, for the Invention of "IMPROVEMENTS IN ROTARY GILL
APPARATUS FOR TREATING JUTE AND LIKE FIBROUS SUBSTANCES," bearing
date at Westminster the 12th day of May 1877, No. 1860.
DISCLAIMER AND MEMORANDUM OF ALTERATION proposed to be
entered by William Parell Butchart and Jaines Foote Butchart, of Dundee,
Scotland, pursuant to the Statutes in that case made and provided.
WHEREAS Her Majesty Queen Victoria by Her Letters Patent under the Great
Seal of the United Kingdom of Great Britain and Ireland, bearing date at West-
minster, the 12th day of May 1877, in the fortieth year of Her reign, did give and
grant unto us, the said William Parell Butchart and James Foote Butchart, our
executors, administrators, and assigns, the sole privilege of making, using,
exercising, and vending the said Invention of "IMPROVEMENTS IN ROTARY GILL
APPARATUS FOR TREATING JUTE AND LIKE FIBROUS SUBSTANCES," within the
United Kingdom of Great Britain and Ireland, the Channel Islands, and Isle
of Man, for and during the term of fourteen years thence next ensuing:
And whereas in pursuance of a proviso in the said Letters Patent contained, we,
the said William Parell Butchart and James Foote Butchart, did, within six
calendar months next after the date of the said Letters Patent, cause a Specification
in writing under our hands and seals, purporting to particularly describe and
ascertain the nature of the said Invention, and in what manner the same was to be
performed, to be duly filed in the Great Seal Patent Office:
And whereas since the filing of the said Specification, we, the said patentees,
have been advised that it is doubtful whether portions of the Specification define
the said Invention with sufficient precision, and that the Specification may be con-

page_text: strued as claiming certain arrangements of mechanism used prior to the date of the
said Letters Patent, but not in the manner and for the purposes contemplated by
us, the said patentees, in carrying out our said Invention:"
And whereas we, the said patentees, are desirous of rendering the said Specifica-
tion sufficiently precise, and of explicitly disclaiming the arrangements herein-before
referred to as having been used prior to the date of the said Letters Patent; and
we are also desirous of altering the said Specification consistently with such
disclaiming, and to correct certain clerical errors, all in manner following, and
without extending the exclusive right granted by the said Letters Patent.
For these reasons we make the following alterations in the wording of the said
Specification, referring to the several parts as they occur in the Queen's Printers'
copy of the Specification, that is to say; first, we substitute the word "roller" for
the word "rollers" which is in the fifteenth line of page. 2.; secondly, we substitute
the words "by means of which gills and supplementary roller" for the words "by
"which gills," which are at the end of the sixteenth line of page 2; thirdly, we
substitute the word "none" for the word "neither," which is in the forty-ninth
line of page 2; and fourthly, immediately after the word "claim," which is near the
beginning of the fiftieth line of page 2, we insert the words "nor do we claim the
arrangement of drawing rollers and rotary gills for enabling both sides of the
"sliver to be acted on as herein-before described, otherwise than when accompanied
by the use of a supplementary roller c, or means for guiding the sliver in a
straight, or nearly straight, course, equivalent to those which, as herein-before
stated, we use, by preference, as being the best known to us for our purpose."
And in order that the effect of this our Disclaimer and Memorandum of Alteration
may plainly appear we proceed to recite the said Specification as hereby amended,
but omitting the preamble and the original testing clause, as follows, that is to
say:
"
";
"
"
Our Invention relates to rotary gill apparatus for treating jute and like fibrous
substances, the object being to render rotary gills more effective than they are as
"at present arranged. For this purpose we employ two rotary gills, one to operate
on each side of the silver as it passes from the retaining to the drawing rollers,
"these two gills being so arranged that the sliver is not bent, or only very slightly
"bent, in passing over or through the teeth of the gills."
"
"
"
"And in order that our said Invention may be properly understood, we now
proceed more particularly to set forth the system, inode, or manner in or under
which the same is or may be used or practically carried into effect, reference
"being had to the annexed Sheet of Drawings and to the letters and figures
"marked thereon, that is to say,"
**
"
Figure 1 is a part longitudinal section of an improved rotary gill apparatus
arranged for operating upon material of which the fibre is short."
"The sliver, marked a, passes through the retaining rollers b, b, and thence by
preference over the supplementary roller c in a straight or nearly, straight line
"between the rotary gill & above and the other rotary, gille below it, by means of
"which gills and supplementary roller the fibres of the sliver are acted upon at both
"sides, and are evenly and thoroughly separated, opened out, and straightened.
"From the gills, the sliver a passes to, the drawing rollers f, g, whose surface of
" contact or grip, for the sliver being in the same straight line,, or nearly so, with,
"the line which the sliver takes in passing through or between the gills from over
"the roller c,. preserves the straight or nearly straight, line of the sliver through the
operating parts of the apparatus.
"
£6
Figure 2 is a part longitudinal section of an improved rotary gill apparatus
"arranged for operating upon material of which the fibres are long."
"In this case the rotary gills d, e, and the supplementary roller c are mounted in
"the same relative position to each other and to the drawing rollers as in the
"arrangement shewn at Figure 1; but the retaining rollers 6 being at a greater
"distance from the gills, other pairs of rollers h, i, are intervened to still further
"conduct the sliver from the retaining rollers 6 to the gills, the long, fibres being

page_text: "
"
supported intermediately by the endless carrying web J, which passes round and
is traversed by the lower rollers h, i. The rollers and gills being in the same
"relative positions as in Figure 1, it follows that in this arrangement also the
"sliver passes in a straight line or nearly so through the operating parts of the
apparatus."
"
"
"The retaining, carrying, and drawing rollers are or may be in both these
arrangements driven as in ordinary rotary gill apparatus."
"The rotary gills e, and the supplementary roller c, may be driven from the
"other revolving parts by spur gearing or the equivalent thereof."
"
"
"
"
"
"
It will be readily understood from the foregoing parts of this Specification
" that our Invention equally applicable to both roving and drawing frames."
Having now described and particularly ascertained the nature of our said In-
vention, and the system, mode, or manner of practically carrying out the same, we
"would observe in conclusion that we are aware that rotary gills have been pre-
viously constructed in which the said rotary gills operate upon both sides of the
sliver; in such previous arrangements, however, the rotary gills have been
arranged with their axes in the same, or nearly the same plane, the effect of
"which upon the sliver in passing through them is to bend and distort the fibres
thereof, and thereby to break the same; in illustrating our Invention we have
introduced the ordinary retaining rollers, carrying rollers, and travelling sheet,
"all of which form part of existing and well-known rotary gill machinery, but to
none of these parts do we lay any claim, nor do we claim the arrangement of
drawing rollers and rotary gills for enabling both sides of the sliver to be acted
on as herein-before described, otherwise than when accompanied by the use of a
supplementary roller c, or means for guiding the sliver in a straight, or nearly
"straight course, equivalent to those which, as herein-before stated, we use by
preference as being the best known to us for our purpose; but what we consider
to be novel and original, and therefore claim as the Invention secured to us by
"the herein-before in part recited Letters Patent is, the arrangement of the rotary
gills d, e, one to operate on each side of the sliver as it passes from the retaining
"rollers to the drawing rollers, these gills being so arranged that the sliver is not
bent, or only slightly bent, in passing over or through the teeth of the gills, as
"herein-before described and illustrated in the annexed Sheet of Drawings."
«
"
66
"
In witness whereof, we, the said William Parell Butchart and James Foote
Butchart, have hereunto set our hands and seals, this Eighteenth day of
March, in the year of our Lord One thousand eight hundred and seventy-
eight
5 I hereby grant my Fiat, giving leave to the above-named William Parell
Butchart and James Foote Butchart to file in the Great Seal Patent Office, with
the Specification to which the same relates, the above written Disclaimer and
Memorandum of Alteration.
1878

page_text: LETTERS PATENT to William Parell Butchart and James Foote Butchart, both
of Dundee, in the County of Forfar, North Britain, for the Invention of
IMPROVEMENTS IN ROTARY GILL APPARATUS FOR TREATING JUTE AND, LIKE
FIBROUS SUBSTANCES.".
"
Sealed the 24th July 1877, and dated the 12th May 1877.
Sealed the 24th July 1877, and dated the 12th May 1877.
PROVISIONAL SPECIFICATION left by the said William Parell Butchart and
James Foote Butchart at the Office of the Commissioners of Patents on the
12th May 1877.
WILLIAM PARELL BUTCHART and JAMES FOOTE BUTCHART, both of Dundee, in
the County of Forfar, North Britain. "IMPROVEMENTS IN ROTARY GILL APPA:
RATUS FOR TREAting Jute and LIKE FIBROUS SUBSTANCES.”
This Invention relates to rotary gill apparatus for treating jute and like fibrous
substances, the object being to render rotary gills more effective thereon than they
are as at present arranged. For this purpose we employ two rotary gills, one to
operate on each side of the sliver as it passes from the retaining to the drawing
rollers, these two gills being so arranged that the sliver is not bent, or only very
slightly, bent, in passing over or through the teeth of the gills.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said William Parell Butchart and James Foote Butchart in the Great Seal
Patent Office on the 9th November 1877.
WILLIAM PARELL BUTCHART and JAMES FOOTE BUTCHART, both of Dundee, in
the County of Forfar, North Britain. "IMPROVEMENTS IN ROTARY GILL-APPA-
RATUS FOR TREATING JUTE AND LIKE-FIBROUS SUBSTANCES."
Driss C31

page_text: Our Invention relates to rotary gill apparatus for treating jute and like fibrous
substances, the object being to render rotary gills more effective than they are as at
present arranged. For this purpose we employ two rotary gills, one to operate on
each side of the sliver as it passes from the retaining to the drawing rollers, these
two gills being so arranged that the sliver is not bent, or only very slightly bent, in
passing over or through the teeth of the gills.
And in order that our said Invention may be properly understood, we now proceed
more particularly to set forth the system, mode, or manner in or under which the
same is or may be used or practically carried into effect, reference being had to the
annexed Sheet of Drawings and to the letters and figures marked thereon, that is
to say,-
Figure 1 is a part longitudinal section of an improved rotary gill apparatus
arranged for operating upon material of which the fibre is short.
The sliver, marked a, passes through the retaining rollers b, b, and thence by
preference over the supplementary rollers c in a straight, or nearly straight line
between the rotary gill d above and the other rotary gill e below it, by which gills
the fibres of the sliver are acted upon at both sides, and are evenly. and thoroughly
separated, opened out, and straightened. From the gills the sliver a passes to the
drawing rollers f, g, whose surface of contact or grip for the sliver being in the same
straight line, or nearly so, with the line which the sliver takes in passing through
or between the gills from over the roller c, preserves the straight, or nearly straight,
line of the sliver through the operating parts of the apparatus.
Figure 2 is a part longitudinal section of an improved rotary gill apparatus
arranged for operating upon material of which the fibres are long.
In this case the rotary gills d, e, and the supplementary roller c are mounted in
the same relative position to each other and to the drawing rollers as in the arrange-
ment shewn at Figure 1, but the retaining rollers b being at a greater distance from
the gills, other pairs of rollers h, i, are intervened to still further conduct the sliver
from the retaining rollers 6 to the gills, the long fibres being supported interme-.
diately by the endless carrying web J, which passes round and is traversed by the
lower rollers h, i. The rollers and gills being in the same relative positions as in
Figure 1, it follows that in this arrangement also the sliver passes in a straight line,
or nearly so, through the operating parts of the apparatus.
The retaining, carrying, and drawing rollers are or may be in both these arrange-
ments driven as in ordinary rotary gill apparatus.
The rotary gills e and the supplementary roller c may be driven from the other
revolving parts by spur gearing or the equivalent thereof.
It will be readily understood from the foregoing parts of this Specification that
our Invention is equally applicable to both roving and drawing frames.
Having now described and particularly ascertained the nature of our said Inven-
tion, and the system, mode, or manner of practically carrying out the same, we
would observe in conclusion that we are aware that rotary gills have been pre-
viously constructed in which the said rotary gills operate upon both sides of the
sliver; in such previous arrangements however the rotary gills have been arranged
with their axes in the same, or nearly the same plane, the effect of which upon the
sliver in passing through them is to bend and distort the fibres thereof, and thereby
to break the same; in illustrating our Invention we have introduced the ordinary
retaining rollers, carrying rollers, and travelling sheet, all of which form part of
existing and well-known rotary gill machinery, but to neither of these parts do we
lay any claim; but what we consider to be novel and original, and therefore claim
as the Invention secured to us by the herein-before in part recited Letters Patent,
is, the arrangement of the rotary gills d, e, one to operate on each side of the sliver
as it passes from the retaining rollers to the drawing rollers, these gills being so
arranged that the sliver is not bent, or only slightly bent, in passing over or through

page_text: the teeth of the gills, as herein-before described and illustrated in the annexed Sheet
of Drawings.
In witness whereof, we, the said William Parell Butchart and James Foote
Butchart, have hereunto set our hands and seals, this Fifth day of November,
One thousand eight hundred and seventy-seven.
W. P. BUTCHART. (1.S.)
J. F. BUTCHART.
(L.S.)