IMPROVEMENTS IN OR CONNECTED WITH SPINNING FRAMES
Year: 1878

page_text: LETTERS PATENT to Leslie Cunningham Marshall, of Belfast, in the County
«
of Antrim, Ireland, for the Invention of IMPROVEMENTS IN OR CONNECTED
WITH SPINNING FRAMES."
<
PROVISIONAL SPECIFICATION left by the said Leslie Cunningham Marshall
at the Office of the Commissioners of Patents on the 5th November 1878.
LESLIE CUNNINGHAM MARSHALL, of Belfast, in the County of Antrim, Ireland.
IMPROVEMENTS IN OR CONNECTED WITH SPINNING FRAMES."
My Invention consists in reducing to a minimum the "waste" made on wet or
dry frames for spinning all classes of fibrous material by the introduction of forks
or "guides," which on the threads or "end" breaking shoot the "rove" into
grooves on the face of the top and bottom brass rollers, thus instantaneously
stopping the supply of "rove," and consequently preventing waste. The forks are
connected with a horizontal balance lever by means of an upright rod. This
upright lever is slightly overbalanced to the front side, and kept in position by_
bearing against the " yarn" or 'end." On the end breaking the lever topples
over, thus raising the upright rod, which shifts the forks (with the aid of slip
weight, spring power, or power derived by friction or otherwise from the boss
roller.

page_text: .
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Leslie Cunningham Marshall in the Great Seal Patent Office on the
☐ 5th May 1879.
LESLIE CUNNINGHAM MARSHALL, of Belfast, in the County of Antrim, Ircland.
"IMPROVEMENTS IN OR-CONNECTED WITH SPINNING FRAMES."
" waste
"
This Invention refers to an apparatus which reduces to a minimum the
-made-on dry or wet frames for spinning all classes of fibrous materials, such as flax,
tow, cotton, hemp, and jute, and it is applied to the existing style of frame as
follows:-
The
The sliver or "rove" instead of being contained in or guided through nitches cut
in the "rove traverse rod" is made to pass over guides or "forks" forming part
of or attached to what may be called a sliding carriage. This carriage works
The
upon the "rove traverse rod," which is remodeled to answer the purpose.
pressure of this carriage laterally with the finger along the top of the "rove traverse
rod" compresses a spiral spring placed between the carriage and a small cap or
bracket which is fixed on the rove traverse rod. The compression of this spring
allows the carriage with the guides attached to leave the rove in position over the
rollers. The rove is retained in this position by a catch rod pendant from the.
back of the carriage, dropping into a notch cut in the rove traverse rod.
catch rod is enclosed within another pendant rod hung from the "trough," or any
other part of the frame not affected by the alteration of the "reach," so that the
lower extremity of this "sheath rod" may always remain in the same place. This
is rendered necessary by the fact that it is the extremity of an over balance lever
coming in contact with or tipping the point of the sheath rod that gives freedom
to the carriage to draw the rove out of the rollers. This lever depends for its
balance upon the yarn or "end" as it spins in this way; the front extremity of
the lever bears on the outside of the thread, its fulcrum being set at the back of
the "thread plate." On the "end" breaking the lever topples over (upwards), and
in so doing increased momentum is given to it by a balance or slip weight attached,
being thereby thrown off its centerpoise, thus giving sufficient power to the
extremity of the lever to push back the sheath rod, liberating the carriage.
The rove is not only contained in the carriage, which may thus be designated
the "top fork," but it also passes through another fork dependant from the carriage,
and so constructed and hung as to bring the rove out of the top and bottom rollers
about the same time, irrespective of draught of frame, and also to ensure against any
licking" or lapping of the rove around the rollers.
$5
Figure 1 of the accompanying Drawings shows in end elevation so much of a
spinning frame as will be necessary-to-illustrate the manner of carrying my Inven-
tion into effect, representing the rove in position in the rollers, and spinning;
Figure 2 is a front elevation of same, representing the "end spinning," and also
the position of the apparatus after the "end" breaks and is drawn out of the
rollers.
A, A', is the trough lid and lip of trough; B is the sliding carriage or top
fork; C is the " rove," passing over or through the carriage down between the top
rollers D and D₁ through the bottom fork E, and through the bottom rollers F
and F; G is the rove traverse rod remodeled; H, H, is the cap or bracket
and spiral spring on the rove traverse rod; I is the notch in the "rove traverse
rod; "J is the catch rod dropping into notch I; K is the sheath rod hung from
the trough A³, and encircling the catch rod; L is the balance lever, the extremity
of which tips the sheath rod K; M is the fulcrum of the balance lever; N is the
centre pivot of the "thread plate; O is the thread plate; P is the yarn or
thread passing behind the lever extremity, and through the "thread plate eyc."
»
By having the balance lever fulcrum behind the centre pivots of the "thread
plate and the front of lever constructed as shewn in Drawing the doffing of the

page_text: frame is greatly facilitated, as the raising of the front of thread plate causes the
levers to shoot clear of the thread, and as by same movement the fulcrum of the
levers is lowered so they (the levers) fly back without coming in contact with
the sheath rod, thus allowing the rove in the rollers to remain undisturbed. The
downward friction of the "end" while spinning so entirely counteracts any strain
that might otherwise be imposed on it (the end) by the slight upward pressure of
the lever that it renders this arrangement an acquisition to the spin, instead of the
contrary, it becoming a sort of take up or regulator, preventing the "ends"
flying. The downward friction cannot predominate, as on the lever being poised
a toe or leg comes in contact with the thread plate. This leg also acts as a sort of
handle, easy of access, by which the lever may be drawn into position obviating the
necessity of any delicacy of touch that might otherwise be required in the balancing
of the lever.
Having now described the nature of my said Invention and in what manner the
same is or may be carried into effect, I declare that I claim,―
The balance lever L in combination with the top fork or sliding carriage B,
spring H¹, lower fork E, catch rod J, and sheath rod K, all substantially as and for
the purposes set forth.
In witness whereof, I, the said Leslie Cunningham Marshall, have hereunto set
my hand and seal, this First day of May, in the year of our Lord One
thousand eight hundred and seventy-nine.
L. C. MARSHALL. (L.S.)