Improvements in Loom Shedding-motions.
Year: 1895

page_text: Date of Application, 3rd July, 1895
Complete Specification Left, 12th Mar.. 1896-Accepted, 25th Apr., 1896
Communicated from abroad by THE SOCIÉTÉ G. ET H. BAUCHE, of 18-20 Rue
Boulard, and JOSEPH TANTIN, 18 Rue Boulard, Reims, in the Republic of
France.]
Improvements in Loom Shedding-motions.
I, WILLIAM PHILLIPS THOMPSON, F.C.S. M.I.M.E. of The Agency for
Foreign Patent Solicitors, 31, High Holborn, in the County of Middlesex,
6, Lord Street, Liverpool, and 6, Bank Street, Manchester, both in the County
of Lancaster, and Lower Temple Street, Birmingham, in the County of Warwick,
Civil Engineer, do hereby declare the nature of this invention to be as.
follows:-
The present application for Letters Patent has for its object a new mechanism
for moving the healds in weaving looms. This mechanism is represented in the
accompanying drawings and described in this Specification.
Figure 1 shows a longitudinal section of the apparatus displaying the arrangement
of the mechanism.
Figure 2 is a transverse section following the lines I, II, III and IV of the
drawings, the pattern chain G with projections being supposed to he removed so as
not to interfere with the clearness of the figure.
Figure 3 represents a sector M.
Figures 4, 5, and 6 show on an enlarged scale the details of the pattern chain
with projections and of its toothed cylinder.
Figure 4 a transverse section of the pattern chain upon its cylinder.
Figure 5 represents the toothed cylinder intended to support the pattern chain
with projections.
Figure 6 represents on a larger scale a portion of the said pattern chain; in this
figure the dotted lines represent the position of the toothed discs forming the
cylinder, the same letters in each figure indicate the same parts.
The novel mechanism is composed essentially of the following parts:
The
1st. A pattern chain G with projections placed upon a toothed cylinder F F
which receives its movement from a shaft or crank brace by means of the
wheels A. B, and the eye bolts v, xyz, and the star wheel C. The pattern
chain G is composed of bars or pieces H the ends of which form hinges and are
connected by means of long bolts I which traverse the pattern chain throughout
its whole width. Upon these bolts are placed at suitable lengths projections J
designed to raise on their passage the levers K; this articulated feed cloth rolls
easily upon the toothed cylinder the bolts I engaging in the depressions n.
cylinder which supports the pattern chain G is formed by placing side by side
upon the same axis a number of toothed discs F. Under these conditions each
bolt I bearing the projections J is held up against each of these by means of the
toothed discs forming the drum as shown clearly in Figure 6, this special
arrangement which constitutes the novelty of our pattern chain with projections,
has for its object to give to this mechanism such strength that it may be able to
support directly the strain of the lifting of the healds even during the weaving of

page_text: the heaviest materials. It may be made of any desired size and consequently gives
every facility for patterns of great length and for the rapid alteration of the same;
it may be pointed out moreover that the constituent parts of this pattern chain
include in their length a series of little pallets p so arranged as only to admit the
passage between them of the projections of the pattern chain with very little play,
the position of the latter is consequently fixed upon the pattern chain without the
It is
necessity of maintaining the same by means of washers or other accessories.
evident that the width of the pattern chain G will vary according to the number
of healds in the loom.
2nd. The series of sectors M corresponding each one to a heald of the loom,
these sectors being independent one of another and capable of oscillating about the
axis a.
Each sector has a curved rib c d upon which runs the roller U of the
piece V, the excentricity of this rib causes the raising of the roller U. The curved
rib c d is planned so as to accelerate the movement of raising the heald at the
commencement whilst the resistance to be overcome is very small, and to reduce it
progressively in proportion. as the heald is lifted, and consequently the effort to be
overcome becomes greater and greater.
The sectors M thus act as the complement of the pattern chain projections so as
to distribute the effect more perfectly. The oscillating movement of each of these
sectors is produced by the pattern chain G by means of the bent lever K and of
the support L secured to the tail piece g of the sector. Each of the sectors M
under the action of a spring Q constantly tends to assume the position indicated
in thick lines in the drawing and corresponding to the lowest position of the
piece V.
The operation of the machine is as follows:-
During the movement of the toothed wheel A the eye bolts va y engage one
after the other in the corresponding depressions of the star wheel C and cause
it to make a fraction of a turn and carry with it the toothed cylinder F F and
consequently the pattern chain G. When a projection J of the pattern chain
arrives under the upper arm of a lever K the latter oscillates upon the axis O and
its lower arm moving by means of the support L the sector M causes the raising of
the piece V; the mechanism then occupies the position indicated by dotted lines
in Figure 1. When the upper branch of the lever K is no longer drawn up by a
projection of the feed cloth the mechanism under the action of the spring Q re-takes
the original position indicated by black lines. The movement of the piece V is
communicated by the usual means to the corresponding heald. In order to prevent
during the mending of broken threads that the healds should be found some raised
and the others lowered which is an inconvenience, we prefer to place upon the axis O
a bent lever T bearing at one of its extremities a handle and at its other end the
piece which controls the whole width occupied by the levers K. By pressing
upon the handle, all the levers K may be raised at once and the warp threads are
consequently all in the same plane which greatly facilitates the operation, this
arrangement is clearly indicated in Figure 1, but not in Figure 2. In order to
make the other arrangement more clear the loom represented in the figures is only
shown for the purpose of displaying the connection of the different parts of each
figure, but it is quite clear that the mechanism above described is quite independent
of the frame loom which may in practice be of any desired shape best adapted for
the purpose to which it is to be applied, it is also evident that the details of the
arrangement and the dimensions of the mechanism may be varied to suit special
cases the principle of the mechanism remaining conformable to the description.
Dated this Third day of July 1895
W. P. THOMPSON & Co.,
31 High Holborn, W.C., Patent Agents for the Applicant.

page_text: I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E. of The Agency for
Foreign Patent Solicitors, 31, High Holborn, in the County of Middlesex,
6, Lord Street, Liverpool, and 6, Bank Street, Manchester, both in the County
of Lancaster, and Lower Temple Street, Birmingham, in the County of Warwick,
Civil Engineer, 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:-
The present application for Letters Patent has for its object a new mechanism
for moving the healds in weaving looms. This mechanism is represented in the
accompanying drawings and described in this Specification.
Figure 1 shows a longitudinal section of the apparatus displaying the arrangement
of the mechanism.
Figure 2 is a transverse section following the lines I, II, III and IV of the
drawings, the pattern chain G with projections being supposed to be removed so as
not to interfere with the clearness of the figure.
Figure 3 represents a sector M.
Figures 4, 5, and 6 show on an enlarged scale the details of the pattern chain
with projections and of its toothed cylinder.
Figure 4 a transverse section of the pattern chain upon its cylinder.
Figure 5 represents the toothed cylinder intended to support the pattern chain
with projections.
Figure 6 represents on a larger scale a portion of the said pattern chain, in this
figure the dotted lines represent the position of the toothed discs forming the
cylinder, the same letters in each figure indicate the same parts.
The novel mechanisni is composed essentially of the following parts
1st. A pattern chain G with projections placed upon a toothed cylinder F F
which receives its movement from a shaft or crank brace by means of the
wheels A. B and the eye bolts v x y z and the star wheel C. The pattern
chain G is composed of bars or pieces H the ends of which form hinges and are
connected by means of long bolts I which traverse the pattern chain throughout
its whole width. Upon these bolts are placed at suitable lengths projections J
designed to raise on their passage the levers K; this articulated pattern chain rolls
The
easily upon the toothed cylinder the bolts I engaging in the depressions n.
cylinder which supports the pattern chain G is formed by placing side by side
upon the same axis a number of toothed discs F. Under these conditions each
bolt I bearing the projections J is held up against each of these by means of the
toothed discs forming the drum as shown clearly in Figure 6, this special
arrangement which constitutes the novelty of our pattern chain with projections,
has for its object to give to this mechanism such strength that it may be able to
support directly the strain of the lifting of the healds even during the weaving of
the heaviest materials. It be made of any desired size and consequently gives
every facility for patterns of great length and for the rapid alteration of the same
it may be pointed out moreover that the constituent parts of this pattern chain
include in their length a series of little pallets p so arranged as only to admit the
passage between them of the projections of the pattern chain with very little play,
the position of the latter is consequently fixed upon the pattern chain without the
It is
necessity of maintaining the same by means of washers or other accessories.
evident that the width of the pattern chain G will vary according to the number
of healds in the loom.
may
2nd. The series of sectors M corresponding each one to a beald of the loom,
these sectors being independent one of another and capable of oscillating about the

page_text: axis a.
Each sector has a curved rib c d upon which runs the roller U of the
piece V, the excentricity of this rib causes the raising of the roller U. The curved
rib c d is planned so as to accelerate the movement of raising the heald at the
commencement whilst the resistance to be overcome is very small, and to reduce it
progressively in proportion as the heald is lifted, and consequently the effort to be
overcome becomes greater and greater.
The sectors M thus act as the complement of the pattern chain projections so as
to distribute the effect more perfectly. The oscillating movement of each of these
sectors is produced by the pattern chain G by means of the bent lever K and of
the support L secured to the tail picce g of the sector. Each of the sectors M
under the action of a spring Q constantly tends to assume the position indicated
in thick lines in the drawing and corresponding to the lowest position of the
piece V.
The operation of the machine is as follows:-
During the movement of the toothed wheel A the eye bolts xyz engage one
after the other in the corresponding depressions of the star wheel C and cause
it to make a fraction of a turn and carry with it the toothed cylinder F F and
consequently the pattern chain G. When a projection J of the pattern chain
arrives under the upper arm of a lever K the latter oscillates upon the axis O and
its lower arm moving by means of the support L the sector M causes the raising of
the piece V the mechanism then occupies the position indicated by dotted lines
in Figure 1. When the upper branch of the lever K is no longer drawn up by a
projection of the pattern chain the mechanism under the action of the spring Q
re-takes the original position indicated by black lines. The movement of the
piece V is communicated by the usual means to the corresponding heald. In order
to prevent during the mending of broken threads that the healds should be found
some raised and the others lowered which is an inconvenience we prefer to place
upon the axis 0 a bent lever T bearing at one of its extremities a handle and at
its other end the piece t which controls the whole width occupied by the levers K.
By pressing upon the handle all the levers K may be raised at once and the warp
threads are consequently all in the same plane which greatly facilitates the
operation, this arrangement is clearly indicated in Figure 1, but not in Figure 2.
In order to make the other arrangement more clear the loom represented in the
figures is only shown for the purpose of displaying the connection of the different
parts of each figure, but it is quite clear that the mechanism above described is
quite independent of the frame loom which may in practice be of any desired shape
best adapted for the purpose to which it is to be applied, it is also evident that the
details of the arrangement and the dimensious of the mechanism may be varied to
suit special cases the principle of the mechanism remaining conformable to the
description.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
In mechanism for producing motion of the healds of weaving looms, the
combination of a pattern chain with studs, with a series of excentric sectors
actuating the healds, the pattern chain with studs being characterised by the
aforesaid special arrangement, affording it the requisite support for overcoming the
resistance caused by the raising of the healds, together with the excentric sectors
for the purpose of accelerating at the commencement the rise of the healds, and
retarding them at the end thereof, all substantially as above described.
Dated this 11th day of March 1896
W. P. THOMPSON & Co.,
31, High Holborn, London, W.C., Patent Agents for the Applicant.