IMPROVE- MENTS IN THE MANUFACTURE OF YARNS USED FOR WEAVING TEXTILE FABRICS. AND IN THE MACHINERY OR APPARATUS EMPLOYED THERE
Year: 1867

page_text: LETTERS PATENT to Thomas Laidlaw, of Sillerbit Hall, in the County of
Roxburgb, North Britain, Gentleman, for the Invention of "IMPROVE-
MENTS IN THE MANUFACTURE OF YARNS USED FOR WEAVING TEXTILE FABRICS,
Sealed the 19th November 1867, and dated the 4th June 1867.
PROVISIONAL SPECIFICATION left by the said Thomas Laidlaw at the
Office of the Commissioners of Patents, with his Petition, on the
4th June 1867.
I, THOMAS LAIDLAW, of Sillerbit Hall, in the County of Roxburgh,
North Britain, Gentleman, do hereby declare the nature of the said Invention,
of "IMPROVEMENTS IN THE MANUFACTURE OF YARNS USED FOR WEAVING TEXTILE.
FABRICS AND IN THE MACHINERY OR APPARATUS EMPLOYED THEREFOR," to be as.
follows, that is to say :-
This Invention, which has for its object the production of yarns on which.a.
spot is formed at intervals by the more close overwinding of one yarn upon,
the other, the intervening spaces being twisted in the usual spiral manner,
consists as follows:-A wheel is fixed on the driving shaft of the twisting.
frame, and it actuates another wheel, on which a wiper is fixed, which during

page_text: one part of its rotation comes in contact with the end of a rod or bar, it forces
the rod forwards causing it to operate upon a lever that actuates the feeding
gear, so that during the time the wiper acts upon the rod the feed is stopped.
Another cam wheel is also used, which is driven off the wheel carrying the
first cam herein-before referred to, and it actuates a rod or wire, so that the
rod or wire may be moved in a direction to cause or force the twisting of the
two threads closer upon each other, thus producing a spot, after which, during
the remainder of its revolution, the cam ceases to act upon the wire or rod
when the ordinary spiral twist is produced, thus producing a continuous and
alternating spot and spiral twist on the yarn..
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Thomas Laidlaw in the Great Seal Patent Office on the
3rd December 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
LAIDLAW, of Sillerbit Hall, in the County of Roxburgh, Gentleman, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fourth day of June, in the year of our Lord One
thousand eight bundred and sixty-seven, in the thirtieth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Thomas Laidlaw, Her special license that I, the said Thomas Laidlaw,
my executors, administrators, or assigns, or such others as I, the said
Thomas Laidlaw, my executors, administrators, or 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
THE MANUFACTURE OF YARNS USED FOR WEAVING TEXTILE FABRICS AND IN THE
MACHINERY OR APPARATUS EMPLOYED THEREFOR," upon the condition (amongst
others) that I, the said Thomas Laidlaw, by an instrument in writing under
my hand and seal, 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 Thomas Laidlaw, do hereby declare
the nature of my said Invention, and in what manner the same is to be per-

page_text: formed, to be particularly described and ascertained in and by the following
statement, reference being had to the accompanying Drawing, and to the
letters marked thereon, that is to say:-
My said Invention, which has for its object the production of yarns on
which a spot is formed at intervals by the more close overwinding of one yarn
upon the other, the intervening spaces being twisted in the usual spiral
manner, consists as follows:-A wheel is fixed on the driving shaft of the
twisting frame, and it actuates another wheel, on which a wiper or cam is
fixed, which during one part of its rotation comes in contact with the end
of a rod or bar, it forces the rod forwards causing it to operate upon a lever
that actuates the feeding gear, so that during the time the wiper or cam acts
upon the rod a spiral twist is produced, and when the lever is drawn back by
means of a spiral spring a spot is produced.
And in order that my said Invention may be properly understood I 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 bad for the sake of more complete elucidation to the Drawing
which I have hereunto appended, that is to say:-
a
The Figure shown on the Drawing is an elevation, in part section, of a
twisting machine. A is the driving pulley, actuating by means of the belt B
the pulley B on the spindle C of the drum, from which the pirn spindles, not
shown in the Drawing, at either side of the machine are driven. On the spindle C
pulley D is placed, which drives the pulley E, and on the same shaft a cone
(not shown in the Drawing) drives the cone F. On the spindle of the cone F
a spur pinion G is fixedgearing into the wheel H; on this wheel a cam I is
fixed, which coming into contact with the small antifriction roller J on the
end of the rod K pushes the clutch L into gear by means of the lever M; as
soon as the can I has passed the pulley J the lever is drawn back by the
spiral spring N which is attached to the rod K, and the clutch L is drawn
out of gear. The consequence of the alternate throwing out and into gear of
the bevil pinions being to produce a spot on the yarn by stopping the
unwinding of the thread P, the unwinding of the thread Q being uniform,
and when the ordinary motion of the machine is restored a spiral twist is
produced.
Having now described the nature of my said Invention, and the manner in
or under which the same is or may be used or practically carried into effect, I
would observe in conclusion that what I consider novel and original, and
therefore claim as the Invention secured to me by the herein-before in part

page_text: recited Letters Patent is, the arrangement of mechanism for producing the
spot and twist upon yarns, as herein-before, described.
In witness whereof, I, the said Thomas Laidlaw, have hereunto set my
hand and seal, this Twenty-sixth day of November, One thousand
eight hundred and sixty-seven.
Witness,
ST. JOHN VINCENT DAY, C.E.,
166, Buchanan Street,
Glasgow.
THOMAS LAIDLAW. (L.S.)