Improvements in Change Box Mechanism for Looms.
Year: 1892

page_text: Date of Application, 26th Nov., 1892
Complete Specification Left. 19th Aug., 1893-Accepted, 23rd Sept.. 1893
PROVISIONAL SPECIFICATION.
[Communicated from abroad by Messrs. Cova & Co., Weavers, and JARED
CRIVELLI, Manager, all of 8, Via Pellegrini, Milan, in the Kingdom of
Italy.]
Improvements in Change Box Mechanism for Looms.
I HENRY HARRIS LAKE, of the Firm of Haseltine Lake & Co. Patent
Agents, 45 Southampton Buildings, in the County of Middlesex, do hereby declare
the nature of this invention to be as follows:-
This invention relates to looms and comprises improvements in the mechanism for
changing the shuttles.
The said improvements have been made with the object of providing for au
increase in the number of throws which the loom can accomplish.
The device by which the lifting rod alternately removes the hooks is operated by
an eccentric keyed upon a shaft which transmits to the lifting rod an alternating
upward movement through the intervention of a lever adapted to turn upon a
journal. A connecting rod connecting a point of the lifting rod and a point of the
said lever is not rigid, but formed at its upper part of a double spring the tension
of which may be regulated at will by means of a bolt and nut. If by any accident
the movement should become irregular for instance by the (tearing of a card of the
pattern, the breakage of the strap of the picker, the stoppage of the shuttle before
its entrance into the box, and the like) a journal which is retained in its place only
by the said double spring, encountering a greater resistance than the normal
resistance in the removal of the hooks, will separate the branches of the double
spring from each other, and descend between them, which will have the effect of
When the obstacle has been
stopping the upward movement of the lifting rod.
eliminated the attendant can easily move the said journal back to its place by
pressing with the foot a foot lever and raising the lifting rod by means of a
handle.
The shuttle-changing mechanism proper which may for instance carry four boxes
to the front of the picker is fixed to one side of the frame of the loom through
medium of a V-shaped standard. A plate carries a pin performing the part of a
journal for a rocking lever and that of a guide for the four hooks provided with
slots through which the said pin is passed. The rocking lever carries two pins, a
journal of the support for the boxes, and two other pins designed to bear upon the
notched pieces adapted to turn the latter, as well as the rocking lever upon the
batten through the medium of journals.
The notched pieces connected with each other by a helical spring hold the rocking
lever in its place and prevent the jolting of the boxes at the time when they change
their position.
The notched pieces also carry pins or bolts the function of which will hereinafter
be described.
Each of the four hooks is provided with two cams the position of which can be
regulated at will by means of screws. These cams serve to liberate the rocking
lever from the notched pieces and to hold the said rocking lever in its place and
consequently the boxes in the position which they must occupy at a given moment,
the hook which has to operate being kept raised during three-eighths of a turn
by the eccentric which gives the notched pieces time to occupy the desired
position.
In order to render the operation of the aforesaid parts properly understood it

page_text: may be well to describe what takes place when it is desired to pass from the position,
in which the third of the boxes is when it is in action, to the position in which the
first box is presented to the picker. For this passage to take place it is necessary
that the lifting rod removes the first hook, which is obtained by a Jacquard
mechanism. As this hook rises it carries away the two cams which, striking
against the above mentioned pins or bolts displace the notched pieces in the desired
manner. At the same time one of the cams strikes against a pin causing the
rocking lever to turn so that a second pin will raise the other cam. This has the
effect of lowering the boxes so as to bring the first compartment in lieu of the third
compartment, on a level with the bottom of the batten. The notched part is
displaced to the right hand side by the second cam so that the aforesaid pin will
bear upon the lowest notch. The action of the aforesaid spring then moves the
notched part against one of the pins the first hook descends again and the whole
remains in its place until the chain of cards effect another change.
All the other movements which may succeed each other in any order, take place
in a similar manner. It is sufficient to state that the first hook always actuates the
first box and that it is the same with the second third and fourth hooks and with
the second, third and fourth boxes respectively.
A helical spring serves to completely equilibrate the movement of the boxes by
reducing to a minimum the resistances which are opposed to a change of position
of the rocking lever. All the pins and the free extremity of the above mentioned
pin or journal, which pass through the slots in the hooks are provided with steel
sleeves which turn loosely in order to reduce the friction and wear.
The described system can be applied to looms having a greater number of
shuttles than four, for instance five six or more. It enables 180 shoots to be thrown
a minute, if the width of the loom is no obstacle.
The arrangement described possesses numerous advantages. In the first place
the movement of the boxes is completely positive or constrained it takes place by
the action of kinematic links without the intervention of forces, which enables the
parts to be rigorously equilibrated.
The movement of the lifting rod is comparatively short, it keeps the boxes in
their place by means of the hooks during about three-eighths of a turn of the
crank shaft, and its action is replaced by that of the notched pieces during the
downward movement of the hooks. The pin on the rocking lever serves only as a
guide for the hooks and does not intervene in the raising of the boxes, by reason
of this fact and owing to the small forces at work, the parts being equilibrated, the
wear is reduced to a minimum. The great simplicity of the whole mechanism
renders the mounting and the attendance very easy. In the case of interruptions
the spring rod is put back to its place very easily by the attendant without the
intervention of an overseer.
Dated this 26th day of November 1892.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Change Box Mechanism for Looms.
I, HENRY HARRIS LAKE, of the Firm of Haseltine Lake & Co., Patent
Agents, 45 Southampton Buildings, London W.C. 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 statements :-
This invention relates to looms and comprises improvements in the mechanism for 5
changing the shuttles.
The herein described improvements have been made with the object of providing
for an increase in the number of throws which the loom can accomplish. The

page_text: improvements forming the subject of the present invention are represented in the
accompanying drawings, in which,
Figure 1 is a side view of the frame of the loom and of the parts which effeci
the raising of the lifting wires.
Figure 2 is a front view of the improved mechanism.
Figures 3 to 6 are side views, each corresponding to a special position of the
shuttle boxes and showing ouly the parts which come into action for determining
this position, whilst the other parts, which actuate the boxes so as to present to the
picker different compartments, are omitted for the sake of clearness.
The device by which the lifting rod e (Figure 1) alternately moves the
hooks al a² a3 at (Figures 2 to 6) is operated by an eccentric a keyed upon a
shaft which transmits to the lifting rod an upward and downward movement
through the intervent.on of a lever c adapted to turn upon a journal d. A con-
necting rod connecting the point q of the lifting rod e and the point p of the said
lever c is not rigid, but formed at its upper part of a double spring fght (Figure 1)
the tension of which may be regulated at will by means of a bolt and nut o. If by
any accident the movement should become irregular (for instance by the tearing of
a card of the pattern, the breakage of the strap of the picker, the stoppage of the
shuttle before its entrance into the box, and the like,) the journal 7 which is
retained in its place only by the said double spring f g h l, encountering a greater
resistance than the normal resistance in the removal of the hooks, will separate the
branches of the double spring from each other, and descend between them, which
will have the effect of stopping the upward movement of the lifting rod e.
the obstacle has been eliminated the attendant can easily move the said journal q
back to its place by pressing with the foot the foot lever m and raising the lifting
rode by means of a handle n.
When
The shuttle-changing mechanism proper is shown in front elevation Figure 2
whilst each of the Figures 3, 4, 5 and 6 is a side view of the parts of this mechanism
carrying the boxes f f f³ and f* respectively to the front of the picker. The
said Figures 3 to 6 show the position corresponding to the four different positions
of the boxes.
The said mechanism is fixed to one side of the frames of the loom (Figure 2)
through the medium of a U-shaped standard t. The said standard carries a pin or
rod u performing the part of a journal for a rocking lever v and that of a guide
for the four hooks a¹ a² a³ a provided with slots through which the said pin u is
passed.
The rocking lever carries two pins ww¹ a journal y of the support for the
boxes, and two other pins gg2 designed to bear upon the notched pieces which
together with the rocking lever vare pivoted upon the standard t through the
medium of journals 23. The notched pieces 61 62 connected with each other by a
helical spring p hold the rocking lever in its place and prevent the jolting of the
boxes at the time when they change their position. The notched pieces also carry
pins or bolts c¹, c² the function of which will hereinafter be described.
U
Each of the four hooks a' a² a³ a is provided with two cams (d²) the position
of which can be regulated at will by means of screws. These cams serve to
liberate the rocking lever from the notched pieces and to hold the said rocking
lever in its place and consequently the boxes in the position which they must occupy
at a given moment, the hook which is to be operated being kept raised during
three-eighths of a turn by the eccentric a (Figure 1) which gives the notched
pieces 6 62 time to occupy the desired position.
In order to render the operation of the aforesaid parts properly understood it
may be well to describe what takes place when it is desired to pass from the position
shown in Figure 5, in which the third box f³ is in action to the position shown in
Figure 3 in which the first box f¹ is presented to the picker. For this movement
to take place it is necessary that the lifting rod removes the first hook a' which is
obtained by a Jacquard mechanism. As this hook rises, it operates the two
cams d¹ d³, which striking against the above mentioned pins or bolts c¹ c³, displace

page_text: the notched pieces 662 in the desired manner. At the same time the cam d' strikes
against a pin w causing the rocking lever v to turn so that a second pin w¹ will
lower on to the other cam d². This has the effect of lowering the boxes so as to
bring the first compartment, in lies of the third compartment f³ on a level with
the bottom of the batten o¹. The notched part 6 is displaced to the right hand
side by the second cam d² so that the aforesaid pin g² will bear upon the lowest
notch. The action of the aforesaid spring p then moves the notched part 6 against
the ping the first book a' descends again and the whole remains in its place until
the chain of .cards effects another change. All the other movements which may
succeed each other in any order, take place in a similar manner. It is sufficient to
state that the first hook a' always actuates the first box 1, and that it is the same
with the second, third and fourth hooks a a³ a' and with the second, third and fourth
boxes f f f respectively.
A. helical spring m³ serves to completely equilibrate the movement of the boxes
by reducing to a minimum the resistances which are opposed to a change of position
of the rocking lever e. All the pins and the free extremity of the above mentioned
pin or journal u, which pass through the slots in the hooks are provided with steel
sleeves which turn loosely in order to reduce the friction and wear.
The herein described system can be applied to looms having a greater number of
shuttles than four, for instance five, six or more. It enables 180 shoots to be
thrown a minute, if the width of, the loom is no obstacle.
The arrangement described possesses numerous advantages in comparison with
some other forms of loom. In the first place the movement of the boxes is quite
positive or constrained, it takes place by the action of kinematic links without the
intervention of forces, which enables the parts to be rigorously equilibrated.
The movement of the lifting rod is comparatively short; it keeps the boxes in
their place by means of the hooks during about three-eighths of a turn of the
crank shaft, and its action is replaced by that of the notched pieces during the
downward movement of the hooks. The pin on the rocking lever serves only as a
guide for the hooks and does not intervene in the raising of the boxes; by reason
of this fact and owing to the small forces at work, the parts being equilibrated,
the wear is reduced to a minimum. The great simplicity of the whole mechanism
renders the mounting and the attendance very easy. In the case of interruptions
the spring rod is put back to its place very easily by the attendant without the
intervention of an overseer.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated to
me by my foreign correspondents, I declare that what I claim is :-
In change box mechanism for looms with rising boxes, in which a rod actuated
by a Jacquard mechanism removes the hooks at the desired moment, each of the
said hooks corresponding to a compartment of the shuttle box, a rocking lever
articulated at one extremity to the support.which carries the box, the pivot pin of
the said rocking lever serving as a guide for the slides of the hooks the displace-
ment of the said lever being effected by two cams applied one on either side of each
hook, while the two notched pieces, engaging with pins arranged symmetrically
round the vertical plane of the centre of rotation of the rocking lever, serve as a
support for the rocking lever during the interval of time in which the box must
remain stationary.
Dated this 10th t... Ր A 1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.