IMPROVEMENTS IN APPARATUS FOR STOPPING THE FEED ROLLERS OF SPINNING MACHINES FOR FLAX OR SIMILAR FIBRES
Year: 1879

page_text: LETTERS PATENT to Hugo Martiny, of Adersbach, in Bohemia, Austria, for the
Invention of "IMPROVEMENTS IN APPARATUS FOR STOPPING THE FEED ROLLERS
OF SPINNING MACHINES FOR FLAX OR SIMILAR FIBRES."
Sealed the 25th May 1880, and dated the 8th December 1879.
PROVISIONAL SPECIFICATION left by the said Hugo Martiny at the Office
of the Commissioners of Patents on the 8th December 1879.
HUGO MARTINY, of Adersbach, in Bohemia, Austria. "IMPROVEMENTS IN
APPARATUS FOR STOPPING THE FEED ROLLERS OF SPINNING MACHINES FOR FLAX
OR SIMILAR FIBRES."
The Invention relates to devices for automatically disengaging the feed rollers of
spinning machines for flax or other fibres as soon as a rupture of the thread or
other irregularity occurs which removes or reduces the tension of the thread, and
consists in mounting the feed rollers loose on their axle, and setting them in motion
by clutch boxes or equivalent coupling devices which turn with the axle, but can
be set out of contact with the feed rollers by a lever acting as soon as the corre-
sponding thread breaks, which function may be effected in the following manner :-
The thread passes over a wire or guide placed between the rollers and the spindles,
and supported by the long arm of a double armed lever, the short arın of which is
placed opposite a revolving sleeve having a helical surface which comes in contact
with the said short lever arm when the latter moved against the axis of the sleeve,
thereby turning the short lever arm in a direction perpendicular to that in which
it has previously been turned by the rupture of the thread, which is inade possible
by providing the lever with a second pivot placed between the feed cylinder and
the helical sleeve, and serving also as fulcrum of a third arm connected with the
aforesaid short lever arm, and placed so as to disengage the sliding clutch of the
feed roller when a thread breaks. The two short arms are provided with handles
which allow them to be turned by hand, and the connection of the third arm with
the clutch is preferably made by a pin attached to the arm and projecting into a
circular groove of the clutch. Another mode of performing the Invention consists
in providing the circumference of the clutch box or equivalent coupling device with
wo helical grooves or rings placed opposite a pin of the curved lever supporting
he feeler or wire over which the thread travels, so that a rupture of the thread
37

page_text: causes the pin to come into contact with the said helical surfaces, thereby shifting
the coupling box on its axis and releasing the feed roller, the curved lever being
free to turn against the axis of the roller, but prevented from being shifted in a
direction parallel to the latter. Each lever extends upward beyond its fulcrum,
where it carries a hinge for a handle movable in a plane perpendicular or oblique
to the motion of the lever, so that it can be put in contact with a detent, which
prevents the motion of the curved lever, and thus sets the apparatus out of action.
The short arm carries also a pin with an adjustable balance weight for regulating
the pressure of the curved lever on the thread. The press rollers opposite the feed
rollers are mounted loose on their shaft, so that each can turn independently of its
neighbour.
SPECIFICATION in pursuance of the conditions of the Letters Patent, and
of an Order of the Lord Chancellor, filed by the said Hugo Martiny in the
Great Seal Patent Office on the 18th June 1880.
"IMPROVEMENTS IN
HUGO MARTINY, of Adersbach, in Bohemia, Austria.
APPARATUS FOR STOPPING THE FEED ROLLERS OF SPINNING MACHINES FOR FLAX
OR SIMILAR FIBRES."
The Invention relates to devices for automatically disengaging the feed rollers of
spinning machines for flax or other fibres as soon as a rupture of the thread or
other irregularity occurs which removes or reduces the tension of the thread, and
consists in mounting the feed rollers loose on their axle, and setting them in motion
by clutch boxes or equivalent coupling devices which turn with the axle, but can
be set out of contact with the feed rollers by a lever acting as soon as the corre-
sponding thread breaks, which function may be effected in the following manner :-
The thread passes over a wire or guide placed between the rollers and the spindles,
and supported by the long arm of a double arined lever, the short arm of which is
placed opposite a revolving sleeve having a helical surface which comes in contact
with the said short lever arm when the latter is moved against the axis of the
sleeve, thereby turning the short lever arm in a direction perpendicular to that in
which it has previously been turned by the rupture of the thread, which is made
possible by providing the lever with a second pivot placed between the feed
cylinder and the helical sleeve, and serving also as fulcrum of a third arm con-
nected with the aforesaid short lever arm, and placed so as to disengage the sliding
clutch of the feed roller when a thread breaks. The two short arms are provided
with handles which allow them to be turned by hand, and the connection of the
third arm with the clutch is preferably made by a pin attached to the arın and
projecting into a circular groove of the clutch. Another mode of performing the
Invention consists in providing the circumference of the clutch box or equivalent
coupling device with two helical grooves or rings placed opposite a pin of the

page_text: curved lever supporting the feeler or wire over which the thread travels, so that
a rupture of the thread causes the pin to come into contact with the said helical
surfaces, thereby shifting the coupling box on its axis and releasing the feed roller,
the curved lever being free to turn against the axis of the roller, but prevented
from being shifted in a direction parallel to the latter. Each lever extends upward
beyond its fulcrum, where it carries a hinge for a handle movable in a plane
perpendicular or oblique to the motion of the lever, so that it can be put in contact
with a detent, which prevents the motion of the curved lever, and thus sets the
apparatus out of action. The short arm carries also a pin with an adjustable
balance weight for regulating the pressure of the curved lever on the thread. The
press rollers opposite the feed rollers are mounted loose on their shaft, so that each
can turn independently of its neighbour. Referring to the accompanying Drawings
(Sheet 1 and 2) Fig. 1 represents the apparatus in cross section; Fig. 2, in front
view; and Fig. 3 in plan. b is the feed roller which can freely revolve on the
shaft a, but is prevented from shifting sideways by means of the set screws b¹. The
feed rollers are set in motion by a removable coupling device or clutches c, which
are so arranged and combined as to share the revolving motion of the shaft a, and
so connected with the latter that they can be shifted lengthwise on said shaft. The
clutches or other coupling device may be disengaged by means of the peculiar
shaped lever g of the feeler, which has its fulcrum at g'. The lower part g¹¹ of
said lever touches the thread, whilst the upper part gl is situated above the
constantly revolving shaft i. The latter is provided with a clutch and helical
surface for each pair of feed rollers. The lever e is revolvable on the fixed pin f
and drops, by means of the projection d, into a groove or clutch c. g is provided
with a handle by means of which the apparatus may be set out of action. The
press rollers press upon the feed roller by a lever and weight, and do not, as
hitherto, share the motion of their axes, but revolve on the axes, so that said rollers
can revolve each for itself. The working of the apparatus is as follows:-When
the same is not disengaged, that is to say, when it works normally, the thread is
conducted to the stretching cylinder by means of the feed roller, so that the
clutch c, which on the machine being in action is set in motion by the incline on
the axis, is coupled with b; this can be executed by turning the handle of e. Now
the feeler takes its position between the cylinder and the thread until the same
slides down or a rupture takes place. In such a case the feeler moves with its
lower part g forward, and its upper part gl, which was kept by the thread above
the shaft k, slides down and is pressed sideways by means of the helical surface
of the shaft . The short lever arm gll forming one with the lever e, and having
their fulcrum at the pin f, causes a lateral motion of g, the lever e, and at the same
time the clutch c, which is pulled sideways and disengaged from the roller b,
whereupon the latier stops and the feeding ceases without the thread coming out
of the feed roller. In order to re-engage the escaped thread the apparatus is to be
set out of action by turning the handle h, that is to say, the lever arm gis
brought above the helical surface by putting the handle upon the projection,
whereby the lever arm gill remains in the aforesaid position until the thread has
been re-engaged; then the clutch c is to be re-coupled with the roller b by means
of the lever e, the thread re-engaged, and by bringing the handle h into its normal
position, the thread is again in contact with the feeler until another rupture takes
place. Referring now to the second modification, which is represented by Figs. 4,
5, and 6, the feed rollers are again shifted loose on the shaft a, and said feed rollers
share the motion of the clutch c, the latter receiving its motion from the shaft a,
but are adapted to slide sideways. Now as soon as the thread of the corresponding
pair of feed rollers loses its tension, the coupling will become disengaged auto-
imatically because of the lever g. The clutches are provided on their outer
peripheries with two helical inclines in which catches the projection d of the
feeler gas soon as the latter moves forward. The feeler g has its fulcrum at the
hinge f, which allows of its being turned to and fro. The hinge f is situated on
the frame A, which is screwed on the bearing in proper position. The frame A is

page_text: HUGO MARTINY. (L.S.)