Improvements in Shuttle Box Motions of Looms for Weaving Coloured Fabrics.
Year: 1891

page_text: Date of Application, 3rd June, 1891
Complete Specification Left. 3rd Mar., 1892-Accepted, 3rd June, 1892
PROVISIONAL SPECIFICATION.
Improvements in Shuttle Box Motions of Looms for Weaving
Coloured Fabrics.
1, SAMUEL GERSON FRÖHLICH, of Ennenda, near Glarus in the Republic of
Switzerland, Manufacturer do hereby declare the nature of this invention to be as
follows
" +
This improvement relates to the movement of the shuttle box, which is, to a
certain extent, a compulsory one, and in the course of which the shuttle box is not'
only lifted but also compulsorily lowered, such being effected by means of suitable
support and by an overcoming of the balance, respectively.
This effect is produced essentially by the aid of a peculiar arrangement of lever,
the position of which can be controlled by an eccentric, thereby also controlling.
the position of another lever, which carries the shuttle box.
From the annexed drawing, the principle of this improvement will be easily
seen.
Figures 1, 2 and 3 are respectively a side view, a front view and a plan of a
portion of a loom having the improvement applied thereto.
Figure 4 is a sketch showing the position of the lever as it is in Figure 1,
whilst
Figures 5 and 6 are similar sketches but showing the lever in the highest and
lowest positions of the shuttle box.
such
The levers is pivoted at r and receives motion from the eccentric or cam sº,
motion being conveyed by means of the bar to and the vertical rod to any one
of the change hooks h, so that, when the proper lever arm is depressed by means
of the levers and the eccentric ", the corresponding change hook will be raised.
This is a well known arrangement, but the mechanism for raising the change hooks
may be of any desired kind.
The arrangement of the lever arms and i, (the latter one of which forms a
stepped support) also pivoted at rand connected with one another, is a known
arrangement, and the lever a (which lever can turn on o) and the rod k, turning,
at and carrying the shuttle boxes, are also partially known. The pin a' at the
front end of the lever a lies in the slot of the change hook h.
The further arrangement, now about.to be described herein, is, however, new,
and there must be mainly taken into consideration the lever b, which is pivoted
atc and is preferably seated in a support d; one arm of this lever comes in
contact with the supporting piece of the so-called change hook, whilst the other
arm is in a certain way in connection with the lever a.
The pin e is fastened at a suitable point in the lever a, each one of the different
steps of the stepped support i serving as a supporting point therefor, and corre-
sponding to the positions of the shuttle boxes; the lever a is preferably provided
with a slot a' (Figure 3) sufficient play being allowed for the stepped support to
oscillate therein. A slot is made approximately at the end of the lever arin
the pine being allowed sufficient play therein to correspond with the movements.
of the lever. The lever is kept constantly drawn downwards by a spring it, the
stepped support i being thereby constantly pressed against the pin e, the stepped.
support will, therefore, only become free of the pin e when the broad roller is
lifted by one of the projections of the change hooks coming against it.
i
The stepped support i, instead of resting on the pin e (which also serves as a
point of contact for the lever arm 6') could naturally also rest on a second special
pin, projection or the like, of the lever a. It is preferable, however, for the sake,
:

page_text: of simplicity, to employ the pin e, which forms the connection between and «,
also as a support and catch point for the stepped support.
The projections on the change hooks, which serve the purpose of lifting up
or releasing the stepped support from the pin e, are also known; but, on the other
hand, the step-shaped projections of cacli single change hook are a characteristic
part of this improvement.
The roller, at the end of the lever arm b, extends over the breadth of the
contiguously arranged projections 2 (see Figures and 3) in such a way that,
when one of the change hooks rises, it encounters the roller g, and thereby the
lever arm, which is pivoted at e, is raised.
As the lever a, which carries the shuttle boxes, is also drawn or carried down
by the downward motion, it is no longer necessary to accelerate, in such a case, the
actual descent by a greater weight.
The
An arrangement is therefore employed, by means of which the shuttle-box-
carrying-lever a is balanced. For this purpose, a chain mo, cord or the like passes
over a pulley, and is, directly or indirectly, connected to a spring m.
pulley is preferably a double pulley, having a centric and an eccentric part; the
spring m is attached to the latter and the chain m" to the former.
Such an arrangement of pulleys has the advantage of allowing an equal pull by
the spring m, as thereby, by a corresponding adjustment, the extended spring acts
on the smaller lever arm or is subjected to a proportionately smaller extension.
It may further be noted that the bindermost change hook in Figure I does not
need to lift the projection ', because, when it has to come into action, the contact
pin e will have to be lifted only and never to be lowered.
As soon as a change hook is lifted, the movable projection encounters the
roller of the lever, whereby the stepped support i will turn away from the pine;
and this pin e may be so raised or lowered.
According to whether the lower end of the slot A³ of one of the change hooks
first encounters the pin aº, or the projection 7, of the same hook, encounters the
roller % the pin e is raised, Figure 6, or lowered, Figure 5. .
Hence, if first encounters a°, the projection 2 will, at the finish, engage the
roller gr and, if first strike the roller, the end of the slot embraces the pin "
so that a sudden drop of the pin e, situated on the lever a, cannot take place,
but the lever bb always provides that the pin emay rest quietly on the steps of the
stepped support i. Hence, the free drop of the shuttle box, which hitherto took
place owing to its own weight, is replaced by a regulated movement.
Dated this 2nd day of June 1891.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Shuttle Box Motions of Looms for Weaving
Coloured Fabrics.
I, SAMUEL GERSON FRÖHLICH of Enuenda near Glarus in the Republic of
Switzerland 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 :-
These improvements relate essentially to the movement of the shuttle box:
which is, to a certain extent, a compulsory one, and in the course of which the
shuttle box is not only lifted but also compulsorily lowered, such being effected by
means of suitable support and by an overcoming of the balance, respectively.
This effect is produced' essentially by the aid of a peculiar arrangement of lever,
the position of which can be controlled by an eccentric, thereby also controlling
the position of another lever, which carries the shuttle box.

page_text: From the drawing filed with the Provisional Specification; the principle of this
improvement will be casily seen.
Figures 1, 2 and 3 are respectively a side view, a front view and a plan of a
portion of a loom having the improvement applied thereto.
Figure 4 is a sketch showing the position of the lever as it is in Figure 1,
whilst
Figures 5 and 6 are similar sketches but showing the lever in the highest and
lowest positions of the shuttle box.
The levers is pivoted at and receives motion from the eccentric or cam",
such motion being conveyed by means of the bar to and the vertical rod t to any
one of the change hooks h, so that, when the proper lever arm is depressed by
means of the levers and the eccentric, the corresponding change hook will be
raised. This is a well known arrangement, but the mechanism for raising the
change hooks may be of any desired kind.
The arrangement of the lever arms 10 and i, (the latter one of which forms a
stepped support) also pivoted at and connected with one another, is a known
arrangement, and the lever a (which lever can turn on o) and the rod k, turning
at and carrying the shuttle boxes, are also partially known. The pin aº at the
front end of the lever a lies in the slot of the change hook h
The further arrangement, now about to be described herein, is, however, new,
and there must be mainly taken into consideration the lever bb, which is pivoted
at c and is preferably seated in a support d; one arm b of this lever comes in
contact with the supporting piece of the so-called change hook, whilst the other
arm is in a certain way in connection with the lever a.
The pine is fastened at a suitable point in the lever a, each one of the different
steps of the stepped support serving as a supporting point therefor, and corre-
sponding to the positions of the shuttle boxes; the lever a is preferably provided
with a slot a (Figure 3) sufficient play being allowed for the stepped support to
oscillate therein. A slot is made approximately at the end of the lever arm ₂
the pin e being allowed sufficient play therein to correspond with the movements of
the lever. The lever is kept constantly drawn downwards by a spring, the
stepped support being thereby constantly pressed against the pin e, the stepped
support will, therefore, only become free of the pine when the broad roller in
lifted by one of the projections of the change hooks coming against it.
The stepped support i instead of resting on the pin e (which also serves as a
point of contact for the lever arm ) could naturally also rest on a second special
pin, projection or the like, of the lever a. It is preferable, however, for the sake
of simplicity, to employ the pin e, which forms the connection between b' and a
also as a support and catch point for the stepped support i.
The projections on the change hooks h, which serve the purpose of lifting up
or releasing the stepped support from the pin e are also known; but, on the other
hand, the step-shaped projections of each single change hook are a characteristic
part of this improvement.
The roller g at the end of the lever arm b, extends over the breadth of the con-
tiguously arranged projections (see Figures 1 and 3) in such a way that, when
one of the change hooks rises, it encounters the roller g, and thereby the lever
arm b, which is pivoted at c, is raised.
As the lever a, which carries the shuttle boxes, is also drawn or carried down by
the downward motion, it is no longer necessary to accelerate, in such a case, the
actual descent by a greater weight.
An arrangement may therefore be employed, by means of which the shuttle-box-
carrying-lever a is balanced. For this purpose, a chain m°, cord or the like may
pass over a pulley n, and be directly or indirectly connected to a spring m. The
pulley n is preferably a double pulley, having a centric and an eccentric part: the
spring m is attached to the latter and the chain m° to the former.
Such an arrangement of pulleys has the advantage of allowing an equal pull

page_text: by the spring m, as thereby, by a corresponding adjustment, the extended spring
acts on the smaller lever arm or is subjected to a proportionately smaller extension.
The spring m.can be connected directly to the lever a, in which case the one
end of the spring would not be fastened at o but, for instance, would be led away
somewhat in the direction of the chain m, over the lever, and the other end
would be led away hot merely (indirectly) over the roll but would be fastened
direct to the lever a. Such an arrangement is shown by Figure 1 of the accom-
panying drawing, the spring in being fixed on the one side at o" and fastened at
on the other side.
$
It may further be noted that the hindermost change hook in Figure 1 does noi
need to lift the projection ', because, when it has to come into action, the contact
pin e will have to be lifted only and never to be lowered.
As soon as a change hook is lifted, the movable projection encounters the
roller of the lever, whereby the stepped support i will turn away from the pine;
and this pin e may be so raised or lowered.
According to whether the lower end of the slot 3 of one of the change hooks
first encounters the pin a°, or the projection 2, of the same hook, encounters the
roller 9: the pine is raised, Figure 6, or lowered, Figure 5.
Hence, if first encounters a°, the projection
will, at the finish, engage the
roller and, if 2 first strike the roller g, the end 3 of the slot embraces the pin a,
so that a sudden drop of the pin e, situated on the lever a, cannot take place, but
the lever always provides that the pin e may rest quietly on the steps of the
stepped support i. Hence, the free drop of the shuttle box, which hitherto took
place owing to its own weight, is replaced by a regulated movement.
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
1. The improvements in looms for weaving coloured fabrics, which consist in
the arrangement of a lever, pivoted on a fixed point, one arm 61 of which is in
connection with a lever a carrying the shuttle boxes and resting on the steps of a
stepped part (such as ) in such a way that a movement of the lever commu-
nicates a similar movement to the lever a, the stepped support having disengaged
the supporting projection (such as pin e) of the lever a, and a movement of the
lever a also moves the lever correspondingly, for the purpose of bringing both
lever a and lever b' into a suitable position of the projection e of lever a for the
corresponding position of the shuttle box which is to be adjusted.
(for
2. In looms for weaving coloured fabrics, the employment of change hooks
with projections for the movement of lever band the slot with stop
the movement of the lever a a°) with or without the projection /'.
3. A balancing device for the lever a consisting of a spiral spring m with or
without intermediate appliances.
4. In a balancing device as mentioned in Claim 3; the attaching device m° with
the roller n in such a way that the spring m is attached to an eccentric part of the
roller n.
Dated this 1st day of March 1802
WM. P. THOMPSON. & Co.,
Of Liverpool, Manchester, Nottingham, and London, Patent Agents.