Operating the same.vers
Year: 1887

page_text: Operating the same.
I, EDUARD FRANZ SCHMIRK of Gropenhain (Saxony) 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 :-
c
My invention relates to actuating devices for weavers shuttles.
The device, which forms the main object of the present invention, is for imparting
motion to weavers' shuttles particularly those shuttles which are adapted for the
reception of thick and hard weft and constructed to carry or hold a considerable
quantity of such weft and it comprises a gripper, of such arrangement, and such an
arrangement of the means for alternately opening and closing the said gripper, that
an absolutely sure grip of the shuttle is secured, yielding only in cases where danger
may be apprehended. An absolute necessity for such a powerful closing as has to be
considered in the subject of the invention, in contradistinction from the known
actuating appliances for weavers' shuttles.
The present improvement enables the attainment of a firm, invariably equal pull of
the weft, which also proves to be a necessity for the working of heavy thick yarns or
of wire (in wire weaving).
In carrying the said invention into practice the shuttle can be arranged for the
reception of a perpendicular spool placed laterally to the direction of the pull, which
spool is then capable of receiving a much greater quantity of weft material than the
ordinary horizontal spools.
One form of the actuating device is represented in the accompanying sheet of
drawing.
Upon the batten A of the loom is arranged on both sides, a bed a upon each of
which is supported in a groove a gripper B (the right hand gripper is not shown).
This gripper, shown to an enlarged scale in Figures 3 and 4, is provided with
gripping jaws b, b¹ pivotted at the point e.
The jaw b is acted upon by a spring h which tends to keep it in its uppermost
position. In the end of the upper jaw is inserted a hardened toothed steel plate i
which prevents the shuttle being drawn from the gripper when the weft is drawn
Paine d

page_text: tight. The shuttle C (Figures 5, 6) has correspondingly toothed steel plates k and l
that rest upon springs in order to enable the shuttle to be easily and yet reliably
gripped.
The weft spool O is arranged vertically in the shuttle in order to obtain a sure and
easy winding off mainly in the case of a thick and rigid weft. The fastening of the
spool is effected by sliding it on to a pin that is held by an angle piece g'. The front
part of the weavers' shuttle is bounded by a bows which contains also the thread
guide hole and the weft thread brake.
The to and fro inotion of the two grippers is effected by a grooved excentric N fixed
upon one end of the shaft y, through the medium of the rod H and of the lever u the
said rod engaging with a slit in said lever and also of a link piece v¹, as shown in
Figures 1 and 2.
The said groove is such that the introduction of the shuttle jaw into the lease takes
place slower and the exit quicker, the former so as not in any way to prevent the
shuttle being firmly gripped by the gripper jaws. A grooved excentric placed upon
the other end of the shaft y moves the second gripper B in a similar manner, the said
gripper is arranged and is operated on the other side of the batten A.
The motions of both grippers take place simultaneously, namely during the opening
of the lease or during the return motion of the batten in such a manner that both com-
mence at the same time their motion from the outside to the inside and vice versa.
The mechanism for opening and closing the gripper at the proper time comprises
the gripper jaw b provided at its rear end 6 with a roller f. Below this roller is
placed along the gripper guide bed a the rod d (Figure 2) capable of turning in the
two bearings m and n. The rod d which is preferably actuated from the crank shaft of
the loom is in connection with the said shaft as hereinafter described. The motion of
the crank shaft is transmitted to the sleeve excentric shaft y by any suitable means.
This said shaft y in its turn actuates a second shaft q by means of two toothed wheels
D and E (Figure 2) at a number of revolutions reduced to one half as compared with
the shaft y. Upon the shaft q is a face-cam F which communicates up and down
motion to the lever w (Figure 2) connected with the face-cam F. This lever wis
connected by a ball joint at h with the double-armed lever (Figure 1). To this
double armed lever r is fixed on one hand the drawing rode for the left hand rod d
and on the other hand the drawing rod not shown, of the right hand rod (d¹).
When the excentric lever w moves upwards (as shown in the drawing) the left hand
drawing-rod v is lifted, and that on the right hand drawn down by the two-armed
lever. Accordingly on the left hand the short arm of a lever d* on the rod d will
be lowered, which causes the opening of the gripper-jaw and the release of the shuttle,
whereas the lever d¹* on the rod (d) on the right hand is lifted, consequently the rear
part of the catcher cover is pressed upwards, thereby effecting the closing of the
gripper, that is to say the shuttle is gripped.
The levers d* and d¹* on the rods d, and d' remain in this position until after
another change of shuttle or until after the introduction of the grippers and the
shuttle into the warp lease.
In lieu of the excentric F two excentrics may be used in which case each drawing
rod is actuated directly by one excentric. The two excentrics must work simul-
taneously but they must be oppositely fixed in such a manner that while one operates
upwards the other must be acting downwards.
The mode of operation of the actuating device for weaver's shuttles is as follows:
The rotation of the excentric N causes an oscillating motion of the lever u and
consequently a to and fro motion of the gripper B connected with the lever u by
means of the link-piece v¹. This link-piece and also that placed on the other side of
the batten A, is thus caused to make the intended symmetrical pendulum motion,
namely in such a manner that a simultaneous to and fro motion thereof to the centre
of the batten A and back takes place during the formation of the lease.
The opening and closing of the grippers must in this case be exerted alternately
which is caused in the following manner;
Suppose it is the turn of the right-hand gripper to introduce the weaver's shuttle C

page_text: into the lease, this gripper must be closed which was previously caused by the rising of
the lever d* on the rod d and its action upon the roller f, the upper toothed steel plate i
having thereby been pressed downwards. The left-hand gripper is at the same time
in its open position in order to be ready for seizing the shuttle. The said gripper
having been opened by the lever d* on the rod d which actuates the same occupying
its uppermost position.
In the said positions of the grippers a simultaneous introduction of the said grippers
on both sides into the warp lease now takes place through the medium of the grooved
eccentric N (Figures 1 and 2). Immediately before the meeting and consequently
during the motion of the two grippers in the lease, a corresponding change of position
in the double armed lever takes place, the lever w having been moved into its other
position by the face cam F, whereby a position of the levers d* and * on the
rods d and d¹, the opposite to the previous one and therefore also of the catcher
mouths, is produced. The left hand gripper is now closed, it having gripped the
weaver's shuttle C whilst the right-hand gripper stands open, the latter having released
the shuttle. Accordingly the back motion of the grippers can take place. without
interference, the shuttle being carried away to the left-hand side of the loom.
During the continued rotation of the eccentric N the reverse operation or change of
shuttle takes place. The left-hand gripper, after having moved simultaneously with
that on the right hand towards the centre of the open lease, gives the shuttle to the
right-hand gripper in consequence of the opening of the former and closing of the
latter, so that the shuttle is carried back from the left hand again to the right hand
side, and the operation can be repeated.
The shuttle shown in Figures 5 and 6 having the spool placed laterally is not
necessarily limited to the actuating mechanism hereinbefore described, as will be
readily understood; it is also adapted for looms where the known shuttle operating
mechanisin exists, and may in general be advantageously employed where the insertion
of spools of great containing capacity and where an easy and sure winding off of the
thread or wire is desirable.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is.-
-
First. An improved actuating device for weavers shuttles, in which grippers provided
with a toothed gripping surface i seize the shuttles at suitable points and introduce and
discharge them, substantially as described.
Second. The elastic support of the shuttle gripping surfaces substantially as
described with reference to (k, 1) Figures 5 and 6 of the drawing.
Third. The alternate closing and opening respectively of the gripper-jaws operated
from the crank shaft of the loom, by raising and lowering the roller fat the back of
the gripper-jaw (6') substantially as described.
Fourth. The arrangement of the shuttle spool O Figure 6 perpendicularly and so
that its axis is outside the line of motion of the shuttle, for the purpose of enabling
the reception of thick hard and a large quantity of weft or wire substantially as
described.
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