IMPROVEMENTS IN MACHINERY POR DOUBLING YARN
Year: 1875

page_text: LETTERS PATENT to John Brown Moscrop, of Red Lumb Mills,
near Rochdale, in the County of Lancaster, Cotton Spinner, for
LLT.
AZÁRÐURUZA TV MACHINERY BAR DOUBLING VARN »
the Invention of " IMPROVEMENTS IN MACHINERY POR DOUBLING YARN
"
Sealed the 26th November 1875, and dated the 28th May 1875.
PROVISIONAL SPECIFICATION left by the said John Brown Moscrop
at the Office of the Commissioners of Patents, with his Petition,
on the 28th May 1875.
I, JOHN BROWN MOSCROP, of Red Lumb Mills, near Rochdale, in
the County of Lancaster, Cotton Spinner, do hereby declare the nature
of the said Invention for "IMPROVEMENTS IN MACHINERY FOR DOUBLING
YARN," to be as follows:-
The object of this Invention is to prevent waste in throstle doubling
frames.
The improved machinery consists in a bridle of wire, the ends of
which are fixed to eccentric cams which rest upon the upper surface of
the bottom roller; this bridle is held in position by the doubled yarn
passing from the rollers to the spindles.

page_text: When the yarn breaks or when snarls are formed the pressure on the
bridle is removed, the cams are then carried forward by the friction on
the bottom roller, thereby causing the upper edges of the cams to come
in contact with the pivots of the top roller, which is thus lifted out of
contact with the bottom roller, thereby 'stopping the supply of yarn 5
until the end has been pieced up or the snarls removed.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Brown Moscrop in the Great Seal Patent
Office on the 27th November 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN 1
BROWN MOSCROP, of Red Lumb Mills, near Rochdale, in the County of
Lancaster, Cotton Spinner, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-eighth day of May, in the
year of our Lord One thousand eight hundred and seventy-five, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said John Brown Moscrop, Her
special licence that I, the said John Brown Moscrop, my executors,
administrators, and assigns, or such others as I, the said John
Brown Moscrop, my executors, administrators, and assigns, should
at any time agree with, and no others, from time to time and
at all times thereafter during the term therein expressed, should and
lawfully might make, use, exercise, and vend, within the United
Kingdom of Great Britain and Ireland, the Channel Islands, and Isle
of Man, an Invention for "IMPROVEMENTS IN MACHINERY FOR DOUBLING
YARN," upon the condition (amongst others) that I, the said John
Brown Moscrop, my executors or administrators, by an instrument in
writing under my, or their, or one of their hands and seals, should
particularly describe and ascertain the nature of the said Invention, and
in what manner the same was to be performed, and cause the same to
be filed in the Great Seal Patent Office within six calendar months
next and immediately after the date of the said Letters Patent.
"
NOW KNOW YE, that I, the said John Brown Moscrop, do hereby
declare the nature of my said Invention, and in what manner the

page_text: same is to be performed, to be particularly described and ascertained
in and by the following statement (that is to say) :—
The object of this Invention is to prevent waste in throstle doubling
frames.
The improved machinery consists in a bridle of wire, the ends of
which are fixed to eccentric cams which rest upon the upper surface of
the bottom roller; this bridle is held in position by the doubled yarn
passing from the rollers to the spindles.
When the yarn breaks or when snarls are formed the pressure on the
bridle is removed, the cams are then carried forward by the friction on
the bottom roller, thereby causing the upper edges of the cams to come
in contact with the pivots of the top roller, which is thus lifted out of
contact with the bottom roller, thereby stopping the supply of yarn
until the end has been picced up or the snarls removed.
And in order that my Invention may be fully understood and readily
carried into operation, I will proceed to describe the accompanying
Sheet of Drawings.
Fig. 1 is an elevation of part of an ordinary throstle doubling framo
to which my improvements are applied, and Fig. 2 is a front view of
the same.
a is the delivering or feed roller; b, the top roller; c, the cap bar;
d, the rail with the glass studs; e, the rail with the guide hooks, and
f the flyers, all of which are made as usual.
My improved machinery for lifting the top roller and thus stopping
the supply consists in the bridle of wire h, similar to that described
in the Specification of former Letters Patent granted to me on
the Fifth day of March One thousand eight hundred and seventy-
four, Number 812, the ends of which are fixed to the eccentric
cams g, shown in plan in Fig. 3, which rest upon the upper surface of
the bottom roller a; this bridle h is held in the position shewn in full
lines in Fig. 1, by the doubled yarn passing from the rollers to the
spindles, thereby holding the upper edges of the cams clear of the pivots
of the top roller b, but when the yarn breaks or when snarls are formed
the pressure on the bridle is removed, the cams 7 are then carried
forward by the friction on the bottom roller, thereby causing the upper
edges of the cams to come in contact with the pivots of the top roller,
which is thus lifted out of contact with the bottom roller, as shewn in

page_text: dotted lines, thereby stopping the supply of yarn until the end has been
pieced up or the snarls removed. As soon as the broken end has been
pieced or the snarls removed the tension of the yarn brings the bridle
down again, and thus moves the upper edges of the cams 7 out of
contact with the pivots of the top roller, and the frame can then
continue its work as before. In putting the cams g into their places the
top roller is lifted up and the bridle is compressed to allow the tops of
the cams to spring into the slots of the cap bar, as shewn in Fig. 2.
The hooks g¹ on the cams 7 come against the lower side of the cap bar C
when the bridle h is up, as shewn in dotted lines in Fig. 1, and so
prevent the apparatus from being carried too far forwards.
Having thus stated the nature of my Invention, and described a
convenient mode of carrying the same into operation, I wish it to be
understood that I do not, limit myself to the details given, as they may
be varied, and that what I claim is the combination of the bridle with
the eccentric cams 9 resting upon the bottom roller a, the friction of
which causes the cams to advance when the yarn breaks or when snarls
are formed, and thus lifts the top roller to stop the supply, thereby
preventing laps, as shewn and described.
In witness whereof, I, the said John Brown Moscrop, have hereto
set my hand and seal, this Twenty-fourth day of November, One
thousand eight hundred and seventy-five.