Improved Regulating Mechanism for Tulle or Bobbin-net Frames.
Year: 1889

page_text: Date of Application, 17th May, 1889
Complete Specification Loft, 17th Foh h 1800 Accepted, 22nd Mar
1890
PROVISIONAL SPECIFICATION.
Improved Regulating Mechanism for Tulle or Bobbin-net Frames.
I, AUGUSTE DESIRE THIRION of No. 23 Boulevard de Strasbourg, Paris France,
Manufacturer do hereby declare the nature of this invention to be as follows:-
My invention relates to a simple mechanism which allows of the production of
tulle fabrics in a perfectly uniform manner from one end of the piece to the other.
Up to the present time, for regulating the greater or less degree of fineness of tulle
fabrics, there have been used different kinds of toothed wheels, the sizes of whose teeth
are numbered and a wheel with larger or smaller teeth was employed, according as the
fabric was required to be of a greater or less degree of fineness. But such degree of
fineness is not always maintained throughout the whole piece; as the tulle fabric is
rolled up on the roller or cloth beam the degree of fineness alters owing to the
increased speed of winding up and it is consequently necessary to alter the wheels 4, 5
or 6 times in the course of the manufacture of a single piece, in order to bring back
the texture of the fabric to its original condition. By this means a fabric of average
equal texture has been obtained, but not one of uniform texture throughout. According
to my present invention I obtain such uniform texture throughout by means of the
following mechanism. Upon the roller or beam on which the tulle fabric is wound
up rests a small roller carried by pivotted arms so that it can rise and fall vertically,
so that as the tulle is wound up on the beam, and the diameter of the latter conse-
quently increases, the small roller gradually rises. The axis of this roller is connected
by connecting rods and a bell crank lever to a disc-cam, so that the roller gradually
actuates the latter, which in its turn operates a stop or abutment presented to a lever
receiving a continuous rocking motion, the lever being moved in one direction by a
revolving cam, and being drawn back in the contrary direction by a spring which
brings it against the before mentioned stop. Thus as the latter is gradually moved
forward by the before mentioned disc-cam, the reciprocating motion of the lever will
be varied according to the position of the stop. The lever is connected by a rod to a
ratchet gear acting on a shaft that effects the rotation of the cloth beam by means of
worm gear, so that as, owing to the increase in diameter. of the cloth beam, the roller
resting thereon causes the gradual advance of the stop, and the consequent reduction
of the stroke of the reciprocating lever, this will at each return stroke, turn the
cloth beam through a gradually decreasing angle this decrease being in such
proportion to the increase of diameter of the cloth beam that the surface speed
of the latter, and consequently the winding on of the tulle will always remain
constant.
The stop is provided with a screw adjustment for adjusting the surface speed of the
cloth beam to the required degree at first starting.
The ratchet gear for actuating the cloth beam consists by preference of a toothed
wheel fixed on the worm shaft, with which gears a pinion carried by two cheeks loose
on the worm shaft, the pinion being fixed to a ratchet wheel with which gear pawls
carried by the cheeks. The latter have arms to which the connecting rod of the
reciprocating lever is pivotted, so that as this turns them through a certain angle in
one direction the ratchet wheel allows the pinion to roll upon the toothed wheel of
the worm shaft without rotating it, while when the cheeks are turned in the contrary
direction by the lever, the ratchet wheel prevents the pinion from turning, and
consequently this carries the toothed wheel and worm shaft round with it.
As the roller is always rotated at a constant speed by the cloth beam, it may be
made, to actuate, a counter that will indicate at any moment the length of the fabric
wound on the beam

page_text: Instead of using a roller as described a pivotted arm may rest with its end upon
the surface of the cloth beam, and actuate the stop in the same manner as the
roller.
Dated: 171
M
1001
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improved Regulating Mechanism for Tulle or Bobbin-net Frames.
I, AUGUSTE DESIRE THIRION, of No. 23 Boulevard de Strasbourg, Paris, France,
Manufacturer, do hereby declare the nature of this invention and in what manner
the same is to be performed to be particularly described and ascertained in and by the
following statement:-
My invention relates to simple mechanism which allows of the production of
tulle fabrics in a perfectly uniform manner from one end of the piece to the other.
Hitherto for regulating the greater or less degree of fineness of tulle fabrics, there
have been used different toothed wheels, having teeth of numbered sizes, and one or
other of those wheels was employed, according as the fabric was required to be of a
greater or less degree of fineness. But such degree of fineness is not always main-
tained throughout the whole piece; as the tulle fabric is rolled up on the roller, the
degree of fineness alters owing to the increased speed of winding up and it is conse-
quently necessary to alter the wheels 4, 5, or 6 times in the course of the manufacture
of a single piece in order to bring back the texture of the fabric to its original
condition.
By this means a fabric of average equal texture has been obtained, but not one of
uniform texture throughout.
According to my present invention I obtain such uniform texture throughout by
means of mechanism such as is shewn on the accompanying drawings. Fig. 1 is a
front view, Fig. 2 an end view and Fig. 3 a plan. Figs. 4 and 5 shew the regulating
gear to an enlarged scale.
Upon the roller or beam C on which the tulle fabric is wound rests a small
roller E having its axis b carried by arms a, so that as the tulle is wound up on the
bean C, increasing its diameter, the roller E gradually rises. The axis of E is
connected by rods I K and a bell crank J to a disc cam L which the ascent of the
roller gradually turns. The disc L acts on an abutment N in which is adjusted the
stop screw T which limits the oscillation of the rocking lever O.
The lever is moved in one direction by a revolving cam, and is drawn back by a
spring which brings it against the stop T.
The lever is connected by a rod F to the mechanism R S V which works the
worm H effecting the rotation of the beam C. Thus as, owing to the increase in
diameter of the beam C, the roller E causes the gradual advance of the stop T, and
the consequent reduction of the stroke of the lever O, the beam C is turned through
a gradually decreasing part of a revolution this decrease of angular motion being
so proportioned to the increase of diameter of the beam, that the surface speed
of the latter, and consequently the winding on of the tulle always remains
constant.
The stop is provided with a screw adjustment, for adjusting the surface speed of the
cloth beam to the required degree at first starting.
The gear for actuating the beam E consists of a toothed wheel V fixed on the
worm shaft, with which gears a pinion S carried by a cheek P loose on the
worm shaft the pinion S being fixed to a ratchet wheel R engaged by pawls e e
mounted on the cheek P which is connected by a rod F to the reciprocating
lever O.
As the cheek P is turned in the one direction, the pawls allow the pinion S to
roll upon the wheel V without rotating it, but when the cheek P is moved in the

page_text: opposite direction the pawls and ratchet prevent the pinion S from turning, and
consequently the wheel V is moved by it.
As the roller E is always rotated at a constant speed by the cloth beam, it
may be made to actuate a counter to indicate the length of fabric wound on the
beam.
Instead of using a roller E as described a pivotted arm may rest with its end upon
the surface of the cloth beam C and actuate the stop in the same manner as the
roller.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
↓
Regulating mechanism för tulle or bobbin net frames consisting of a roller or its
equivalent, which, resting on the beam that winds the fabric actuates by means of a
cam a stop so as to limit the oscillation of the lever that works the beam gearing,
thus rendering the winding speed constant, substantially as described.
Dated this 17th day of February 1890.
ABEL & IMKAY,
Agents for the Applicant.