Improvements in Loom Shedding Mechanism.
Year: 1889

page_text: Date of Application, 30th Aug., 1889-Accepted, 12th Oct., 1889
COMPLETE SPECIFICATION.
Improvements in Loom Shedding Mechanism.
I, FELIX TONNAR, of Dülken, Kingdom of Prussia, and German Empire 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 looms for weaving and the said invention consists in the
peculiar construction arrangement and combination of a treading machine for upper
and lower shed with a device for lifting or not as the pattern may require, the
levers causing the upward and downward movements of the shafts, by means of a
cog-wheel and two toothed cylinders arranged above and below the same and turning
in opposite directions, all as more fully hereinafter described.
In the drawings accompanying this specification,
Figure 1 is a longitudinal section of my improved treading machine for looms.
Figure 2 is a section on the line e, a of figure 1.
Figure 3 is a plan of the same.
Figure is a detail partly in section.
Figure 5 shows a modification and,
Figure a general arrangement of my improved treading machine.
The frame of the treading machine consists of two side parts A connected by cross
bars B. a is a bar on which the angle levers a are fulcrummed, the latter being
connected with the shafts above and below by means of strings a², Figure 6. bare
arms movably fastened to the angle levers a at a³ and connecting the same with the
treading machine proper in such a way as to receive from the latter a reciprocating
movement and transferring a corresponding movement to the shafts for forming the
shed. The said arms are each provided with a pin which loosely engages with
the side surface of one of the cog-wheels c journalled on pins d' of the lever d; the
said lever being fulcrummed at d². The said lever d is also provided with a crank
pin d³ resting in a semi-circular groove c¹ formed on the cog-wheel c for the purpose
of limiting the rotary movement of the latter. 3 is a frame arranged below the
lever d, capable of being lifted and lowered by means of an eccentric 1³ figure 2,
mounted on the axis h² of a toothed cylinder g.
3 is a
04 pro-
A number of angular catches o³ are fulcrummed to a bar m³ on the said frame ³
in such a manner as to lean against a cross-piece n³, Figure 3, on the same.
second frame carrying a hexagonal pattern-cylinder på capable of being lifted and
lowered by the eccentric t³ also mounted on the axis h², an arm p of the said pattern-
cylinder på resting on the said eccentric ³. The cards of the pattern-chain q³ hanging
on the pattern-cylinder p³ are either provided with a hole or smooth. If the pattern-
card appearing below the horizontal arm of one of the angular catches from below,
after a turn of the pattern-card, be smooth; that is to say, without a hole, then the
horizontal arm of the angular catch will be raised by means of one of the pins
vided with a head and loosely sliding in a projecting portion formed on the frame k³,
thus causing the respective vertical arm of the said angular catch to be brought
under a shoulder 3 of the lever d. The frame 3 and the lever d now being raised by
the eccentric, the cog-wheel c is likewise raised and made to engage with a toothed
cylinder arranged above it and continuously rotating, the said cog wheel being
kept in engagement with the said toothed cylinder, as long as required by the
eccentric 13. The frame and the pattern cylinder p³ actuated by the eccentric t³
thereupon being lowered, one of the pegs on the pattern-cylinder is caught by a
hook of a forked lifter w³ causing the pattern cylinder to be rotated to the extent of
one sixth of its circumference thereby producing a new card on the upper surface of
the said pattern-cylinder. Supposing that the card now brought to the top has a
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page_text: hole, then the cog-wheel c is permitted to engage with the toothed cylinder y arranged
below it on the axis 2 and rotating in an opposite direction to that of the other
toothed cylinder f.
By drawing the lifter w³ to the right or left, by means of a string, the pattern
cylinder may be caused to rotate to the right or left, as the case may be.
al
In the modified arrangement shown in Figure 5 the forked lifter w³ is actuated by
two star-wheels 2 and z¹ mounted on the axis of the toothed cylinder the said lifter
being fulcrummed at a² and forked at its other end, each of the forked ends
being provided with a roller. The forked end engages with the star wheel ¹, the
said star-wheels being so constructed as to cause either the one or the other of the
hooks of the lifter w³ to come in contact with a peg 3 of the pattern-cylinder på
thereby rotating the latter when the same is to come into action, or passing the said
pegs sideways, when the pattern cylinder is not to be rotated according as the one or
the other of the said star wheels z, 2 actuate either the one or the other of the forked
ends, a. A spring w is applied either at ¹ or at Us, this depending upon the
direction in which the pattern cylinder is to be rotated.
с
The toothed cylinders and g are rotated in opposite directions from the conical
wheels, of a shaft í each revolution of the said conical wheels corresponding to a
revolution of the loom. The number of teeth on either of the said cylinders fand y,
however, being but half that of the number on the intermediate cog-wheel c the latter
can only make half a revolution to each revolution of the said toothed cylinders.
Thus, when the angle lever a is to be moved say to u* one of the angular catches o³
must be brought under the lever d in order to bring the cog-wheel c to engage with
the toothed cylinder f rotating in the direction of the hands of a clock. On the
other hand when the angle lever a is to be moved the other way, it will be necessary
that none of the angular catches appear below the lover d so as to allow the cog-
wheel to engage with the toothed cylinder y rotating in an opposite direction.
The extent of the free space to be left, or the diameter of the toothed cylinders f
and 7, depends upon the speed at which the shafts are to form the shed. In order to
secure a slow movement of the shafts the free space, and hence also the diameter of
the toothed cylinders, will have to be as small as possible the number of teeth of
the said cylinders always being half that of the number on the cog-wheel c. For the
purpose of setting the angle-levers a and the shafts at rest for several shots of the
loom when at the end of their movement, a corresponding number of teeth are
omitted on the cog-wheels c so that, even when the pitch-lines of the said wheels
and of the toothed cylinders touch each other above or below, the said cylinders
will pass along the said cog-wheels c without engaging with the same.
The cog-wheels c and the levers d are held in their highest as well as in their
lowest position by a catch striking against a shoulder of the said lever d from
below, the said catch h being drawn by a spring h¹ and released by means of an
eccentric and lever ³. As soon as the levers d or the cog-wheels c are raised
or lowered, the catch h is disengaged through the eccentric /*.
Below the levers d a slide k, Figure 4 may be preferably arranged, for bringing
the said levers d from their lowest position into their uppermost position by drawing
the said slide k outward. By this means the same result may be obtained as by
means of a pattern chain. On rotating the loom to the extent of one shot at this
position of the machine, all the shafts of the lower shed will be lifted, the position of
the shafts thus obtained being the most favorable one for drawing the warp. In
order to allow of performing this manipulation without requiring to rotate the loom
at all, I arrange a coupling ³, Figure 6, on the shaft i by means of which the
machine may be uncoupled from the loom. Thus, when rearranging the _weft, the
machine may be simply driven by hand by turning the crank g¹, Figure 2,
arranged on the side of the lower toothed cylinder 9, and the shafts thus be
moved.
In re-arranging the weft and taking out weft-threads the pattern-cylinder must be
given one turn in an opposite direction, this being effected by reversing the forked
Tiftar 3

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondent I declare that what I claim is :-
First. In a loom for weaving the combination, with a frame, capable of being
moved upward and downward of a system of angular catches actuatel and set at rest
by means of the pattern-cylinder capable of being raised and lowered, substantially as
and for the purpose described.
Second. In a loom for weaving the combination with a frame capable of being
moved upward and downward of a system of angular catches brought into and out
of connection with a lever carrying a cog-wheel by means of the cards on the pattern-
cylinder capable of being raised and lowered and of a pair of toothed cylinders turning
in opposite directions, substantially as and for the purpose described.
Third. In a loom for weaving the combination, with a frame capable of being
moved upward and downward, of a system of angular catches brought into and out
of connection with a lever, carrying a cog-wheel, by means of the cards on the pattern
cylinder, capable of being raised and lowered of a pair of toothed cylinders moving
in opposite directions and of means for transmitting the movement from the said cog-
wheel to the shafts, substantially as and for the purpose described.
Fourth. In a loom for weaving the combination with the frame k³, capable of being
moved upward and downward of the angular catches o³ the pattern cylinder p³ capable
of being raised and lowered, pattern-chain and lifter w³ lever d with cog-wheel c
and
toothed cylinders and g moving in opposite directions, arms b, angle levers
strings a², substantially as and for the purpose described.
Fifth. In a loom for weaving the combination with a lifter working in two direc-
tions of two eccentrics engaging the lifter with and disengaging the same from the
pattern-cylinder substantially as and for the purpose described.
Sixth. In a loom for weaving the combination with the levers of the cog-wheels
actuating the shafts of a catch, substantially as and for the
purpose described.
Seventh. In a loom for weaving the combination with the levers of the cog-
wheels actuating the shafts of a slide, substantially as and for the purpose described.
Dated this 30th day of August 1889.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.