IMPROVEMENTS IN MACHINERY OR APPARATUS FOR PREPARING, SPINNING, AND DOUBLING COTTON. AND OTHER FIBROUS MATERIALS
Year: 1854

page_text: LETTERS PATENT to John Macmillan Dunlop, of Manchester, in the
County of Lancaster, Engineer, for the Invention of "IMPROVEMENTS IN
MACHINERY OR APPARATUS FOR PREPARING, SPINNING, AND DOUBLING COTTON.
AND OTHER FIBROUS MATERIALS."
Sealed the 30th March 1855, and dated the 5th October 1854.
PROVISIONAL SPECIFICATION left by the said John Macmillan Dunlop
at the Office of the Commissioners of Patents, with his Petition, on the
5th October 1854.
I, JOHN MACMILLAN DUNLOP, of Manchester, in the County of Lancaster,.
Engineer, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN MACHINERY OR APPARATUS FOR PREPARING, SPINNING, AND DOUBLING
COTTON AND OTHER FIBROUS MATERIALS," to be as follows:-
My Invention relates to such machines for preparing, spinning, and doubling
as are provided with revolving spindles, the bearings of which are variable as
regards their steadying effect, and consists in imparting a velocity to the said
spindles, so as to drive them at an accelerated rate accordingly as they become
more effectually steadied, and vice versa.
To illustrate my Invention, I will suppose it adapted to a slubbing or roving
frame. I drive the machine by conical pullies, placed overhead or mounted
upon the frame; at the time the bobbin is at the bottom of the lift the spindle

page_text: is the most unfavorably situated as regards its bearings, and the machine is
therefore driven at the slowest rate; as, however, the copping is effected and
the bearing rises, the driving strap is caused to traverse by connection with
the copping motion, so as to impart a quicker rate of revolution until the
lift is accomplished; the return downward will after the same manner be
accompanied by a decreasing rotatory velocity, until the the slowest motion is
again obtained.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Macmillan Dunlop in the Great Seal Patent Office on
the 5th April 1855.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
MACMILLAN DUNLOP, of Manchester, in the County of Lancaster, Engineer,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fifth day of October, in the year of our Lord One
thousand eight hundred and fifty-four, in the eighteenth year of Her reign,
did, for Herself, Eler heirs and successors, give and grant unto me, the said
John Macmillan Dunlop, Her especial license that I, the said John Macmillan
Dunlop, my executors, administrators, and assigns, or such others as I, the said
John Macmillan Dunlop, 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 "IMPROVE-
MENTS IN MACHINERY OR APPARATUS FOR PREPARING, SPINNING, AND DOUBLING
COTTON AND OTHER FIBROUS MATERIALS," upon the condition (amongst others) that
I, the said John Macmillan Dunlop, 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 John Macmillan Dunlop, do hereby
declare the nature of my said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement and accompanying Drawings, that is to say:-
My Invention relates to such machines for preparing, spinning, and doubling

page_text: as are provided with revolving spindles, the bearings of which are variable as
regards their distance or steadying effect, and consist in imparting a velocity
to the said spindles, so as to drive them at an accellerated rate accordingly as
they are more effectually steadied, and vice versa. In order to illustrate my
Invention, I will suppose the case of a slubbing or roving frame, referring to a
Sheet of Drawing accompanying this my Specification; in which, Figure 1 is
a partial elevation of the machine; and Figure 2, a detached view of the
apparatus by which it is driven. The fast and loose pullies of the machine by
which the spindles are driven are shewn at a, receiving rotatory motion from an
overhead shaft c. which is provided with a conical pulley d, over which a strap
passes to a second conical pulley e, mounted upon a shaft f, driven by connexion
with the motive power. The copping rail is shewn at 'g, to which is jointed a
rod h, the other end thereof being connected to a bell crank lever i, capable of
turning upon a fixed centre at j. One arm of the bell crank lever is provided
with a slot, within which is situate a pin, projecting from an arm k, attached to
a rod 1, capable of sliding to and fro in guides m. This rod is furnished with
two forks n. o, between which the strap runs. The operation of my improve-
ment is as follows:-According to the position shewn in the Drawing, the
bobbin P is at the bottom of the lift, and the spindle g therefore is in its most
unfavorable position for steadiness, there being the greatest amount of length
extending upward from the bearing r; as, however, the copping rail rises, the
said bearing will travel with it, and afford increased means of steadiness, and
simultaneously with this motion the rising of the rod h will cause the bell crank
lever i to turn upon its centre, thereby imparting a sliding motion to the rod 1,
so as to cause the forks n, o, to traverse the strap along the conical pullies d, e,
the consequence of which will be an increasing velocity of the shaft c, and
through that to the spindles 9; upon the dropping of the copping rail the
contrary effect will take place, until the velocity which was started with is
regained. I have in the above description alluded particularly to slubbing or
roving frames, but it will be evident that the same principle may be adapted
to throstles or other machines in which revolving spindles are employed,
the bearings of which are variable as regards their distance or steadying effect.
I would also observe, that, instead of conical pullies, other means, as friction
surfaces, for instance, may be employed for gaining the variable speed, and
that the necessary apparatus may, if desired, form a part of the machine,
instead of being detached therefrom.
Having thus described and ascertained the nature of my said Invention,
and the manner in which the same is to be performed, I desire it to be under-
stood that I claim, as secured to me under the above in part recited Letters

page_text: Patent, and as applied to such machines as above set forth, imparting to the
spindles thereof an increasing or decreasing speed, accordingly as they are more
or less effectually steadied.
In witness whereof, I, the said John Macmillan Dunlop, have hereunto
set my hand and seal, this Fourth day of April, One thousand eight
hundred and fifty-five.
JOHN M. DUNLOP. (L.S.)