IMPROVEMENTS IN APPARATUS FOR REGULATING THE TENSION OF THE WARPS IN LOOMS
Year: 1879

page_text: LETTERS PATENT to Julius Allınann, of Manchester, in the County of Lan-
caster, Patent Agent, for the Invention of "IMPROVEMENTS IN APPARATUS
FOR REGULATING THE TENSION OF THE WARPS IN LOOMS." A communication
from abroad by H. Vogt, of Reutlingen, in the Kingdom of Wurtemberg.
Sealed the 4th July 1879, and dated the 7th March 1879.
Sealed the 4th July 1879, and dated the 7th March 1879.
PROVISIONAL SPECIFICATION left by the said Julius Allmann at the Office
of the Commissioners of Patents on the 7th March 1879.
re
JULIUS ALLMANN, of Manchester, in the County of Lancaster, Patent Agent.
IMPROVEMENTS IN APPARATUS FOR REGULATING THE TENSION OF THE WARPS IN
LOOMS." [A communication from abroad by H. Vogt, of Reutlingen, in the
Kingdom of Wurtemberg.]
The Invention relates to apparatus for regulating the frictional resistance to the
rotation of the warp-beam of a loom with the object of obtaining an uniform tension
of the warp. Upon one end or upon each end of the warp-beam is fixed a pulley
which is acted upon by a pair of gripping levers, which are partly curved to suit
the pulley, and are or may be lined with felt, leather, wood, or other suitable
material. The said levers are hinged together at one end, or are so arranged as that
each lever furnishes a fulcrum for the other. In one arrangement an adjustable
screw on one lever bears against the end of the other lever. The other end of one
lever is connected with the frame, the connection being preferably rendered elastic
by means of caoutchouc or of a suitable spring. A bell crank lever is mounted on
the corresponding end of the other lever, and the shorter end of the said bell-crank
lever engages with a hook or link which is jointed to the other gripping lever.
The longer arm of the bell crank lever is connected with a weighted lever, and a
contact bar, roller, or part which is in contact with the warp upon the beam, by
following up the coiled warp as it lessens in diameter, shifts the point of suspension
of the load nearer to the fulcrum of the bell crank lever. In the arrangement
devised for the purpose a horizontal rod rests by each end upon the two bell crank

page_text: levers, or upon the lever and upon a suitable support in case the apparatus is
applied only to one end of the beam. To this rod is attached an arm or arms
which carries or carry the said contact bar or part. A rod or link connects the said
borizontal rod with the weighted lever. The parts are so proportioned as that the
movement of the horizontal rod upon the bell-crank lever shall bear the same pro-
portion to the reduction in the radius of the coiled warp as the distance between
the fulcrum of the bell-crank lever and the point of suspension of the load when
the beam is empty bears to the radius of the empty beam. When so proportioned
the pressure of the gripping levers upon the pulley is reduced in proportion to the
reduction in the radius of the coiled warp upon the beam.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Julius Allmann in the Great Seal Patent Office on the 5th September
1879.
JULIUS ALLMANN, of Manchester, in the County of Lancaster, Patent Agent.
"IMPROVEMENTS IN APPARATUS FOR REGULATING THE TENSION OF THE WARPS IN
LOOMS." (A communication from abroad by H. Vogt, of Reutlingen, in the
Kingdom of Wurtemberg.)
This Invention relates to apparatus for regulating the frictional resistance to the
rotation of the warp-beam of a loom with the object of obtaining an uniform tension
of the warp.
Upon one end or upon each end of the warp-beam is fixed a pulley
which is acted upon by a pair of gripping levers which are partly curved to suit
the pulley, and are or may be lined with felt, leather, wood, or other suitable
material. The said levers are hinged together at one end, or are so arranged as that
each lever furnishes a fulcrum for the other. In one arrangement an adjustable
screw on one lever bears against the end of the other lever. The other end of one
lever is connected with the framing, the connection being preferably rendered elastic
by means of caoutchouc or of a suitable spring. A bell crank lever is mounted in
the corresponding end of the other lever, and the shorter end of the said bell-crank
lever engages with a hook or link which is jointed to the other gripping lever.
The longer arm of the bell-crank lever is loaded, and a contact bar, roller, or part
which is in contact with the warp upon the beam, by following up the coiled warp
as it lessens in diameter, shifts the point of suspension of the load nearer to the
fulcrum of the bell-crank lever.
And in order that the said Invention may be fully understood I have attached
hereunto a Sheet of Drawings made to a scale of about two inches to the foot and
marked with letters of reference, to which Drawings I will now refer. Fig. 1
represents a side elevation, and Fig. 2 a back elevation of part of an ordinary loom,
the parts not necessary to the illustration of the Invention being omitted. In the
said Figs., A is the warp beam; b is the warp proceeding from the said beam; and
c is the aforesaid pair of gripping levers consisting of two levers c and c¹. The
upper portion of each lever is curved to fit upon the periphery of a metal pulley d,
which is fixed upon the end of the warp beam, as is usual. The upper end of
lever c¹ passes through a slot in the corresponding end of the lever c, and a screw
in the lever c bears against the lever c¹, and constitutes an adjustable fulcrum for
both levers. A slot is formed in the lower end of the lever c, and a jaw in the lower
end of the lever c'. A hook or link e passes through the slot in the lever c, and is
jointed or pivoted by one end to the said lever. In the jaw of the lever c¹ is
mounted a bell-crank lever f which is provided with trunnions which rest in
bearings in the lever c². The said bell crank lever is formed with a long arm and
a short arm, and the latter engages with the hook e. It will be seen that a down-
ward pressure applied to the longer arm off will cause the gripping levers to be
tightened upon the pulley d. There is a corresponding arrangement at the other
end of the warp beam which does not appear in the Drawing. A rod g extends
from one lever f to the other, and rests upon the two levers. The said rod is
connected at each end by means of a rod h with a weighted lever i, which furnishes
the load for the lever fat each end of the warp beam. The surface upon which
the rod g rests is inclined so that the said rod tends to slide inwards towards the
fulcrum of the lever f. To the said rod is fixed an arm which carries a presser
bark which bears upon the warp on the beam, and thereby keeps the rod g in
position on the arm f. As the diameter of the warp upon the bearer decreases, the
presser k, by following up the warp, permits the rod g to slide inwards towards the
fulcrum of the lever f, and thereby to decrease the effect of the load upon the
gripping lever c. When the warp beam is empty the rod g and the presser k will
be in the position indicated by the dotted lines. The parts are so proportioned as

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that the movement of the rod g upon the arms f shall bear the same proportion to
the reduction in the radius of the coiled warp as the distance between the fulcrum
of the bell-crank lever and the point of suspension of the load when the bearer is
empty bears to the radius of the empty beam. When so proportioned the pressure
of the gripping levers upon the pulley d is reduced in proportion to the reduction
in the radius of the coiled warp upon the beam. To prevent the gripping lever
from-being carried around by the warp beam the lower end of the lever cis-con-
nected by a bolt to a bracket fixed to the framing, a spring of caoutchouc or a
spiral spring being interposed to render the connection elastic. Fig. 3 illustrates a
modification in the method of connecting the lever c with the framing. In this
example a curved spring m is attached to the lower end of the said lever, and passes
through a slot in one end of a radius rod n which is jointed by the other end to
the framing. A cord or chain passing over a pulley is attached by one end to the
rod n, and by the other end to the rod g, so that as the last named rod moves
towards the fulcrum of the lever f the rod is lowered as indicated by the dotted
lines. This lowering of the rod n increases the play of the spring m, and thereby
regulates the vibration of the warp beam. In Figs. 4 and 5 the lower end of the
lever c is connected by means of a plate spring with fixed part attached to the loom
framing. The rod g.is dispensed with, and a rod o is cranked at one end to receive
a roller k, and at, the other end to fix in a block p which slides upon a rod which
forms the long arm of the lever f. The load is suspended by means of the rod h
from the rod o. Fig. 6 illustrates a further modification. In this example a positive
vibratory movement is imparted by means of an excentric and link g to the gripping
levers. The end of the link g enters a curved slot in the lever c. A cord or. chain
connects the said link with the sliding block on the arm f, so that as the warp beam
empties, the end of the link is lowered in the slot, the vibratory movement of the
beam being thereby increased in order that the to and fro movement of the warp
may be uniform. Fig. 7 illustrates another modification, wherein the rod g is
attached to a rod r which slides in an eye at s at each side of the loom, so that the
arm and presser k are compelled to move nearly in a straight line instead of radially,
as in Fig. 1. A cranked bar t attached to the weighted lever presses the rod g
downwards upon the arm f. In Fig. 8 the weighted lever is dispensed with, and
the load is directly suspended from the rod g.
Having now fully set forth and indicated the nature of the said Invention and
methods whereby the same may be carried into effect, I would have it to be under-
stood that I claim,
First. The combinations of parts acting substantially as and for the purpose set
forth and indicated.
Secondly. The friction clip tightened by means of a lever, the load upon which
lever is shifted nearer to the fulcrum as. the yarn is unwound from the beam, sub-
stantially as set forth and indicated.
And, lastly. The friction clip formed in two parts arranged to clip a pully fixed
on the yarn beam, one part being elastically attached to the loom framing, and the
two parts being drawn together by means of a bell-crank. lever, and the arrange-
ments for shifting the load upon the said lever in proportion as the yarn
unwound, substantially as and for the purpose set forth and indicated.
In witness whereof, I, the said Julius Allmann, have hereunto set my hand
and seal, this First day of September, in the year of our Lord One thousand
eight hundred and seventy nine.
JULIUS ALLMANN. · (L.S.)