Improvements in Change-box Motions of Looms for Weaving.
Year: 1898

page_text: Date of Application, 30th June, 1898-Accepted, 22nd Apr., 1899
COMPLETE SPECIFICATION.
Improvements in Change-box Motions of Looms for Weaving.
I, FRANZ WÄCHTLER, of Dülken, near München-Gladbach, in the German
Empire, Works Director, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement; -
This invention relates to mechanism for changing the shuttles in looms, in
which the lifting parts, moved only in one direction, for instance the discs of the
known Hacking mechanism, act on the repeating needles in a predetermined
manner, and change their positions, so that after each change of box they occupy
a position which cannot be changed by the changing card which has effected the
change of the shuttle box and the lifting part engaged.
In the known Hacking changing device a non-perforated card causes the
engagement of a coupling which makes half a revolution owing to the action of
an eccentric. When a perforated card comes into action neither the excentric nor
the shuttle box is changed because the coupling is not engaged. A change can
only be effected by a non-perforated card. In this case their is the great dis-
advantage of the change of the shuttle that, for instance at the search for the
shot or at the arrangement of the changing cards, the weaver must make the
movement of the needles strictly dependent upon the momentary arrangement of
the changing boxes.
This invention is designed to obviate these disadvantages, in which the arrange-
ment is made that, for instance a non-perforated card always corresponds to a
certain position of the shuttle boxes and a perforated card to a certain other
position of the shuttle boxes.
In order that this invention may be the better understood I now proceed to
describe the same reference being had to the accompanying drawings and to the
letters and figures marked thereon
Figure 1 is a side view of the complete shuttle changing mechanism.
Figure 2 is a front view thereof.
Figure 3 is another mode of carrying out the invention.
Figure 4 shows the most essential part of Figure 1 separately, and Figure 5
is a front view of part of Figure 4 with parts removed.
All these parts, except the new arrangement for the introduction of the
mechanical work to the lifting parts are known.
In order to make the character of the invention clear, reference is first had
to Figure 3.
In the old Hacking changing mechanism the repeating needle is affected
directly by changing cards and the position of the repeating needle is changed,
in the direction of the arrow 8, only when a non-perforated card comes into
action. As soon as the needle has been adjusted in this manner it enters into a
curved groove of the disc 2, whereby the latter and with it a wheel are changed,
so that the pins of this wheel engage with the teeth of the wheel 15. Afterwards
half a revolution of the wheel 15 and the eccentric 3 takes place, the latter being

page_text: connected by rods with the shuttle boxes, so that at each engagement of a coupling,
i.e., at each action of a full non-perforated changing card, a change of the shuttle
boxes is effected.
In the form of construction shown in Figure 3 the position of a curve disc 12 is
changed with that of the eccentric 3, the roller 13 of an adjusting piece 14 which
serves for the reception of the repeating needle resting against the disc 12. In con-
sequence at one position of the eccentric 3 the repeating needle Z occupies the position
indicated by full lines in Figure 3, and during the second position it occupies the
position indicated by dotted lines. Opposite the repeating needle 7 is provided
an auxiliary needle 4, guided in an adjusting piece 5 and continuously reciprocated
by a lever 7 pivotted on an axle 6. The auxiliary needle 4 rests on a pin 9,
affected by the changing card 11, and which occupies a high position or a low
one, according as to whether the small roller or the large roller is in action, and
thus keeps the auxiliary needle 4 in the positions shown in Figure 3 by full lines
and dotted lines respectively.
In the position of the piece 14 shown in Figure 3 by full lines, the coupling
can engage for the change of box, when a small roller is under the pin 9. In
this case all parts occupy the position shown by full lines, and the lever presses the
auxiliary needle 4 against the repeating needle 1 during its movements to
the left, and the repeating needle will cause the engagement of the coupling and
the change of position of the eccentric 3 by half a revolution. During this partial
revolution the curve-disc 12 causes the piece 14 to swing into the position shown
in dotted lines, so that if the auxiliary needle 4 is not lifted by a large roller, an
engagement of the coupling cannot take place at the next oscillation of the lever.
The fresh engagement of the coupling can take place only when the auxiliary
needle 4 is also brought into the position, shown by dotted lines, by means of a
large roller, and is thus able to strike during its oscillation against the free end of
the repeating needle. A small roller therefore effects the engagement of the
coupling and a change of position of the shuttle boxes only when the eccentric
occupies its deepest position; a large roller of the changing card can only effect
a change of position when the eccentric is in its highest position. The small, as
well as the large roller thus corresponds to a certain definite position of the shuttle
box, and if the same changing card, or, what is the same thing, a large roller,
should enter into action successively, engagement, and consequent change of
position of the shuttle boxes cannot take place because then the repeating needle
avoids the auxiliary needle 4. A certain card thus always corresponds to a certain
definite position of the shuttle boxes and causes a change of position of the boxes
only if the position corresponding to this card is not occupied by the shuttle boxes.
Figure 1 which illustrates a form of construction different from Figure 3, shows
the connection of the eccentric with the shuttle boxes 1, 21. The rod 27 carries a
pin 28 around which engages the forked end of a double lever 29. This lever 29 is
connected by a rod 30 with the piece 14, so that the latter is moved with the
eccentric 3.
Instead of the auxiliary needle 4 a sliding piece 16, see Figures 4 and 5, is
provided in the lever 7, which is connected by a wire 17 or similar device,
Figure 1, with a bell crank lever 25, against the lower end of which presses the
pin 24 which is affected by a changing card. The lower end of the lever 7 is
connected by a draw bar 20 and roller 21 with the eccentric 19 on the principal
axle, and is therefore changed in position in the direction of the arrow 22, so as
to be always withdrawn by the spring 23 into its original position.
One hole 18 of the slide 16 can be opposite to the repeating needle and will
not effect in this case the engagement of the coupling. However, as soon as the
non-perforated part of the slide becomes situated against the repeating needle 7,
it presses the latter against the disc 2 and thus effects the engagement of the
coupling. The perforated slide 16 is drawn upwards by non-perforated card
board or sheet metal plate in an opposite sense to the action of the spring 26 and

page_text: remains in its lowered position in case a perforated card comes into action. The
sliding piece 16 corresponds exactly to the action of the auxiliary needle 4
described with reference to Figure 3, inasmuch as its position is changed by the
changing card and coacts with the repeating needle in such a manner that a
certain card corresponds to a certain position of the shuttle box.
Having now particularly described and ascertained the nature of my invention
and in what manner the same is to be performed, I declare that what I claim is:-
Mechanism for changing shuttles having lifting parts rotated only in one
direction such as a disc and eccentric of Hackings mechanism in which repeating
needles are forced to change their positions, and can thus change their position
after each change of shuttle, in such a manner that the adjusting pieces (auxiliary
needles 4, sliding pieces 16), which are arranged so as to be compelled to move
with the changing cards, escape at the repeated operation of the same or an
equivalent changing card, so as to ensure for a certain card a certain position of
the shuttle boxes.
Dated this 20th of T 1900