Improved Mechanism for Actuating the Healds of Looms.
Year: 1891

page_text: Date of Application, 15th Sept., 1891
Complete Specification Left, 14th June, 1892-Accepted 16th July, 1892
PROVISIONAL SPECIFICATION.
[Communicated from abroad by ADOLF SILVERBERG, Manufacturer, and PETER
SCHIFFER, Foreman of Works, both of Bedburg, near Düren, Rhine Province,
Germany.]
Improved Mechanism for Actuating the Healds of Looms.
I, OLIVER IMRAY, of No. 28 Southampton Buildings, Chancery Lane, in the
County of London, Fellow of the Institute of Patent Agents, do hereby declare
the nature of this invention to be as follows:
This invention relates to an improved construction of the mechanism for effecting
the up and down motion of the healds in looms, whereby the said motion is effected
after each throw of the shuttle in an accurate and regular manner, enabling every
desired description of weaving to be obtained in the fabric, such as has heretofore
only been possible with the use of a special heald machine.
The said improvement will be understood on reference to the accompanying
drawing, in which
Fig. 1 shews a part side elevation of a loom with the improved mechanism applied
thereto,
Fig. 2 shews the mechanism detached, shewing the two working positions of the
heald lever and roller holder.
The mechanism consists of a cam plate A the projections a and b of which control
the motion of the roller c. The latter is carried by a holder d.which moves up and
down in the lever e and is provided with a slot, and whose relative motion is limited
by a stud carried by the lever e, the said holder being connected to a lifting
mechanism of known construction in looms, which, by means of a card cylinder,
lever and needle, also of known construction, brings it into the required position
such as shewn at Fig. 1 for its further operation, which position depends upon the
kind of weaving to be carried out.
The one end of the lever e is connected by cords with the healds, while the other
is loosely pivotted to the loom framing.
The cam plate or plates A is or are fixed by screws to a disc or discs fixed on
the shaft of the loom drum, the rotary motion of which consequently causes the
cam plates to effect an accurate and regular up and down motion of the roller
holder d, corresponding to the rotary motion of the drum, the holder being made
to butt against the stud fin its highest and lowest positions, whereby it is made to
carry the lever heald e up and down with it so as to produce the up and down
motion of the healds.
The roller holder d is guided in the cam plate in two different ways; in its lower
position Fig. 2 its roller c runs on the lower edges of the projections a, while in its
upper dotted position it runs upon the upper or outer edges of the projections
and in the position of rest, it sinks down between the projections a and bears upon
the projection b.
a
The raising and lowering of the levere and consequently of the healds is therefore
indirectly effected by the roller c which, either in regular or irregular sequence, is
made to run first on the upper side and then on the lower side of the projections a
of the cam plate A.
With this improved arrangement the loom can be worked with an unlimited
number of heald levers, which was not heretofore possible with drum-looms without
a special heald machine.
·Dated this 15th day of September 1891.
ABEL & IMRAY,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improved Mechanism for Actuating the Healds of Looms.
I, OLIVER IMRAY of No. 28 Sonthampton Buildings, Chancery Lane in the
County of London, Chartered Patent Agent, 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 :-
This invention relates to an improved construction of the mechanism for actuating
the lever of the drum in cylinder looms (that is to say looms in which the movement
of the treadles is effected by a cam cylinder or drum), which may easily be applied
to looms already in use and working with counter traction and closed shed, and which
permits of maintaining the same manner of working of the closed drum for the
production of patterns with unlimited treadle repeating.
The four accompanying sheets of drawings show in general the essential
moments of the different relative positions of the several parts of such a
mechanism.
The Figures 1, 2 and 3 are part side views of a loom provided with the
improved mechanism; they show cross sections through the drum and the pattern
cylinder.
Figures 1 and 2 show the positions of the main parts when the shed is
closed and
Figure 3 shews the same when the shed is open.
Figure 4 is a part front view of a loom having its treadle device in the position
shewn in Figure 3 in side view.
On one side of the loom the treadle cylinder or drum is carried on a shaft b;
this drum consists of several similar discs or cam plates A. such as shown in the
arcompanying-drawings, and it is actuated by pulley and gearing.
These cam plates are furnished with two branched cam grooves nn¹ passing the
one into the other, the former of which serves to form the lower shed and the latter
to form the upper shed; the two grooves are formed by projecting rims o, and
when the shed is closed they are in such a position, that the small roller / running
therein is freely suspended, owing to the counter-traction exercised on the levers of
the drum.
The roller is carried by a holder k, which moves up and down in the lever d
of the drum and is provided with a slot, and the relative motion of which is limited
by a stud m carried by the lever d, so that the holder k can be pushed, at the beating
of the lathe, from one groove to the other without actuating the lever d, which is
pivotted at the point c. The holder k is connected by means of a spring i to a
bent lever / pivotted at the point g, and the shorter arm of which is provided
with a roller butting against the pattern chain; the latter runs over the pattern
gylinder & which is actuated by means of suitable gearing f and a from the drum
driver.
The spring suspension i of the holder k is necessary for causing the roller and its
holder to follow the lower cam groove, as shown in Figures 2 and 3, and to pull
downwards the drum lever without lowering the longer arm of the lever h, which is
not possible in this position, as the shorter arm of the lever h bears against the
pattern chain.
The four projecting corners arranged on the. cam plates have for their purpose
to support the drum levers during the reversal, so that the warps are not pulled
out of their horizontal position by the weight of the levers.
According as the pattern cylinder pushes forward a roller or a small tube of the
pattern chain, the longer arm of the lever h will be lifted or lowered, which is
possible when the cam plate occupies the position shown in Figure 1. When the
shed is closed, if for instance a small roller on the pattern chain, acts on the roller
of the bent lever, it lifts the longer arm of the same, and in consequence thereof

page_text: also the roller by means of spring i and holder k, so that the latter enters into the
upper groove n through the spaces n' at the junctions. The lower end of the slot
of the holder then butts against the stud m carried by the lever d.
The parts being in this position when the drum revolves, the roller is caught
by the upper groove and lifted; the lower end of the slot presses against the stud m
and lifts the lever d so that the lower shed will be obtained as shewn in
Figure 4.
The formation of the upper shed takes place when there is no roller of the
pattern chain acting on the roller of the bent lever. The longer arm of the lever h
is then lowered and with the same the holder k, and the roller falls into the lower
groove, until the upper end of the slot of the holder & butts against the stud mas
shewn at Fig. 2. When the drum revolves, the roller is caught by the lower
groove and the drum lever is pulled downwards by the holder k and the stud m, so
as to form by the counter-traction cording an upper shed.
Fig. 3 shows the positions of the levers, when the shed is trodden.
This appliance also permits of treading at the moment of the beating for the
subsequent shoot, either for an upper or a lower shed; and when, as in the above
described case, the lifting or lowering of the holder is effected by means of a pattern
chain or card, any optional shed in any optional succession may be trodden, and in
consequence patterns with an unlimited number of treadles may be used, which was
not heretofore possible with drum looms without a special treading machine.
Having now fully described and ascertained the nature of the said inven-
tion and in what manner the same may be performed, I declare that what I
claim is :-
In cylinder looms, a mechanism for actuating the lever d of the drum consisting
of a uniformly revolving cam plate having two branched cam grooves, the one of
which passes over into the other, so that one cam groove n' gives the upper shed
and the other n the lower shed, while the roller & transferring the motion to the
drum lever is carried by the latter in such a manner, that it may be brought at the
junction n of the two cam grooves into the scope of the one or the other of these
grooves for forming the shed corresponding to the pattern to be produced, sub-
stantially as set forth and shown in the accompanying drawings.
Dated this 14th dex of June 1892.
ABEL & IMRAY,
Agents for the Applicant.