Improvements in Stop Motions for Machines used in Preparing Flax and other Fibres for Spinning.
Year: 1893

page_text: Date of Application, 25th Oct., 1893
Complete Specification Left, 11th July, 1894-Accepted, 11th Aug., 1894
TRUVIDIONAL DIE ICATION.
Improvements in Stop Motions for Machines used in Preparing Flax
and other Fibres for Spinning.
We, MALCOM MACGREGOR GREEVES, of Forth River Mill, Falls Road,
Belfast, in the County of Antrim, Ireland, Manager, and THOMAS LUCAS, of
the same place, Mechanic, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in the apparatus described in the
Specification of our former Patent No. 13041 of 1892.
It is designed to provide apparatus in which the tumbler or stop lever shall be in
contact with and kept in place by the sliver and fall forward when the sliver breaks
or fails to remain in contact with it and is pushed backward should any lump in the
sliver come against it in either case stopping the frame.
In carrying out the invention it is designed to work with a sliding or recipro-
cating bar acting in conjunction with a stationary bar such as described in the
Specification of Patent No. 13041 of 1892 but it may be arranged to work with
other form of knocking off motion.
To the 'fixed bar we pivot a tumbler or lever swinging horizontally on its
pivot provided in the front with a smooth face or edge over or against which
the sliver travels and with a bracket or lug at the back which engages with the
knocking off bar which in the case of reciprocating notched bars enters the slots or
notches cut therein.
In front of the tumbler or lever is a stationary rod or bar (preferably of semi-
circular form in cross section) underneath which the sliver is caused to pass.
This bar guides the sliver to the rollers and holds it in contact with the face of the
pivoted lever.
Behind the pivoted lever we place a hinged or pivoted bar which runs the length
of the head provided with a lug or finger to engage with the knock off motion.
This bar keeps the tumbler or pivoted lever in position while the slack or loose
sliver is lying against it before being taken up by the rollers and also serves to
stop the machine in the case of a lump or knot upon the sliver. Such lump or
knot on being drawn between the tumbler and the fixed bar or rod, forces the
tumbler back and overbalances the hinged bar the arm or lug on which engages
with the notches in the reciprocating bar of the knocking off motion and stops the
machine.
Dated this 24th day of October 1893.
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Stop Motions for Machines used in Preparing Flax
and other Fibres for Spinning.
We, MALCOM MACGREGOR GREEVES, of Forth River Mill, Falls Road,
Belfast, in the County of Autrim, Ireland, Manager, and THOMAS LUCAS, of
the same place, Mechanic, 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 :-
--
This invention relates to improvements in the apparatus described in the
Specification of our former Patent No. 13041 of 1892.

page_text: It is designed to provide apparatus in which the tumbler or stop lever shall be in
contact with and kept in place by the sliver and fall forward when the sliver breaks
or fails to remain in contact with it and is pushed backward should any lump in the
sliver come against it in either case stopping the frame.
It will be fully described with reference to the accompanying drawings in which
the invention is shown as applied to a single sliver.
Fig. 1. Elevation partly in section with the stop motion in normal position when
the machine is at work.
Fig. 2. Transverse section of same.
Fig. 3. Plan of same (partly in section).
Fig. 4. Plan (partly in section) showing position the parts assume to stop the
machine.
Fig. 5. Transverse section showing position of parts when the machine is stopped
by the tumbler or lever being forced back by a lump or knot in the sliver.
Fig. 6. Transverse section showing position of parts when the machine is stopped
by the tumbler or lever moving forward owing to the breaking of or absence of
sliver.
Fig. 7. Transverse section of a modified arrangement.
Fig. 8. Transverse section of a further modification.
The fixed or stationary bar A and the sliding or reciprocating bar B are arranged
and are actuated as described in the Specification of our former Patent No. 13041
of 1892.
To the stationary or fixed bar A or in close proximity to it we pivot a tumbler
or lever C capable of being moved to both sides of the centre upon which it is
pivoted. It is so pivoted as to fall or move forward by its own weight when not
resting against the sliver. It is provided in front with a smooth face or edge c
against which the sliver D is maintained in contact or over which it slides, and at
the back with a bracket or lug c¹ which serves the double purpose of engaging with
the notch 6 of the reciprocating bar B when the tumbler moves forward and of
actuating a knocking off bar E when it is moved or forced backwards.
In front of the tumbler or lever C is a stationary rod or bar F (preferably of
semicircular form in cross section) underneath which the sliver D is caused to pass.
This bar guides the sliver to the rollers and holds it in contact with the face c of
the pivoted lever C.
Behind the pivoted lever C and the bars A and B we hinge or pivot a knocking
off bar E extending the length of the head of the frame. This bar E is provided
with one or more lugs or fingers e which when the bar is moved about its pivot or
hinge engages with the notches a and b in the bars A and B. The bar E holds or
keeps the tumbler or pivoted lever C in position when the sliver is loose or slack
and pressing against it before being taken up by the rollers. It is however so
balanced that on a lump or knot in the sliver passing between the face c of the
tumbler C and the stationary bar F it is moved backwards and overbalanced and
thus serves to stop the machine.
Its action is illustrated in Figs. 4 and 5. On a lump or knot forming on the
sliver and being drawn between the tumbler C and the fixed bar or rod F it forces
the tumbler C back and overbalances the hinged bar E the lug or finger e on which
engages with the notches 6 in the reciprocating bar B of the knocking off motion
and stops the machine.
The action of the tumbler C is illustrated in Figs. 4 and 6 when the sliver breaks
the tumbler moves forward and the bracket engages with the notches 6 in the
reciprocating bar B of the knocking off motion and stops the machine.
In Fig. 7 in addition to the pivoted tumbler or lever C for stopping the frame on
the absence of the sliver an auxiliary pivoted tumbler or lever is shown which
stops the frame through the knocking off bar E when released by it through the
presence of a knot or lump on the sliver. This tumbler C' is pivoted or hung
from the bracket G in such manner that it is swung forward on the knot passing
between the brass bar c¹ and the sliver pulley H and releasing catch g permits the

page_text: knocking off bar E to engage with the bars A and B as shown in dotted lines. The
flanges of the sliver pulley H are cut away as shown to permit the bar c" to be
pivoted in the position it is necessary for it to assume in relation thereto. The
mechanism might also be arranged to operate in conjunction with sliver bar F when:
a knot or lump is passing under it.
In Fig. 8 the pivoted tumbler or lever C' is arranged to stop the frame on the
passage of the knot between brass bar c¹¹ and the cover or bars A and B. When
thrown forward by the sliver the knocking off bar El engages with bars A and B
as shown in dotted lines. This mechanism may also be adapted to work in con--
junction with sliver bar F. The arms ¹ may be employed or serve as a means to
adjust the parts in order to restart the frame.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, we declare that what
we claim is
1. A stop motion for drawing or preparing frames for flax and other fibres
constructed with a pivoted lever balanced to move forward and capable of being
moved backward, and a hinged or pivoted bar behind the lever so placed that the
backward movement of the lever moves the bar and throws it into contact with a
reciprocating stop bar to stop the machine substantially as described.
2. In a stop motion for drawing and preparing machines for flax and other
fibres the combination with the stationary bar A and the reciprocating notched stop
bar B of the horizontally pivoted tumbler or lever C and the knocking off bar E
substantially as described.
3. A stop motion for drawing and preparing frames for flax and other fibres
with the several parts constructed and arranged in combination substantially as
described and shown with reference to either of the figures of the drawings.
Dated this 9th day of July 1894.
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.