IMPROVEMENTS IN MECHANISM FOR ACTUATING THE LATHE AND JACQUARD OR SHEDDING MOTION OF LOOMS FOR WEAVING
Year: 1884

page_text: I LOUIS LAESERSON, temporarily of 83 Clarendon Road, Manchester, Lancashire,
and of Moscow in the Empire of Russia, Manufacturer, do hereby declare the
nature of said Invention for IMPROVEMENTS IN MECHANISM FOR ACTUATING THE
LATHE AND JACQUARD OR SHEDDING MOTION OF LOOMS FOR WEAVING, which
invention has been partly communicated to me from abroad by Hermann Wilke,
of Moscow, Russia, Engineer and is partly my own invention, to be as follows:-
This invention relates to improvements in looms for weaving, the object of the
improvements being to cause a dwell or pause in the motion of the slay or lathe of
a loom at the moment when the shuttle passes through the open shed of the warp
and when weaving fancy goods to cause a like dwell or pause in the movement of
the barness actuated by a Jacquard, shaft machine, or shedding engine, the length
of the dwell in either case being proportionate to the time occupied by the shuttle
in passing from one side of the loom to the other.
I apply this invention to a loom of the ordinary construction with a double
bent crank producing the movement of the slay and in order to effect the dwell
I do not let the cranks act directly on the slay by means of the connecting rods
or levers but I fit the crank pin in a slot or loop of special curve, forming part of a
rocking or sliding lever to which the connecting rod is pivoted whilst the fulcrum
of this intermediate lever is allowed to rock or slide on any convenient part of the
loom. The curve in each of these levers I make to correspond with part of the
circle described by the crank so that the latter in completing its revolution runs
for a certain distance in the slot without imparting motion to the slotted levers
and thus to the slay, during which pause I arrange the loom so that the shed of
the warp shall be open for the shuttle to pass.
To diminish friction I prefer to place upon each crank pin two or more anti-
friction bowls or rollers which work in the slot of the lever. By preference
I bring these rollers on the double bent crank by casting brass or phosphor bronze
or other metal separately or as one round the crank pins and turn and finish and
cut them into sections when required.

page_text: To give the desired dwell to the Jacquard, shaft machine or shedding engine,
one or more levers with alots of the same design or principle as described for the
dwell of the slay are applied to the crank or cranks which produce the lift of the
Jacquard, or shaft machine or shedding engine, the connecting rod or rods being
attached to the slotted lever or levers and act in a similar manner to that described
for the connecting rods of the slay; a simultaneous dwell being thus produced
corresponding or nearly so with the dwell of the slay.
I have described the invention as applied to both the slay and the Jacquard but
it might be used separately for either.

page_text: COMPLETE SPECIFICATION.
I LOUIS LAESERSON, temporarily of 83 Clarendon Road, Manchester, Lancashire,
and of Moscow, in the Empire of Russia, Manufacturer, do hereby declare the
nature of said Invention for IMPROVEMENTS IN MECHANISM FOR ACTUATING THE
LATHE AND JACQUARD OR SHEDDING MOTION OF LOOMS FOR WEAVING, which
Invention has been partly communicated to me from abroad by Hermann Wilke,
of Moscow, Russia, Engineer, and is partly my own 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 improvements in looms for weaving, the object of the
improvements being to cause a dwell or pause in the motion of the slay or lathe of
a loom at the moment when the shuttle passes through the open shed of the warp
and when weaving fancy goods to cause a like dwell or pause in the movement of
the harness actuated by a Jacquard, shaft machine, or shedding engine, the length
of the dwell in either case being proportionate to the time occupied by the shuttle
in passing from one side of the loom to the other.
And in order that this Invention may be fully understood and readily carried
into effect I will describe the accompanying Sheet of Drawings, reference being had
to the figures and letters marked thereon.
Figure 1 is a plan illustrative of this Invention as applied to a loom in which a
double bent crank shaft is employed to actuate the slay or lathe and in which the
shaft is also provided with a crank with stud and bowl or bowls to drive the
Jacquard motion. Fig. 2 is a side view of Fig. 1 showing only the parts relating to
the slay or lathe and Fig. 3 is also a side view of Fig. 1 but showing only the parts
relating to the Jacquard and Figs. 4, 5 and 6 are detailed views illustrating the
construction of the slotted levers.
In these views, a is the double bent crank shaft producing the movement of the
alay band in order to effect the desired dwell I do not let the two cranks a¹ act
directly on the slay by means of the connecting rods or levers c as usual, but I fit
the crank pin in a slot or loop d' of special curve forming part of a rocking or
sliding lever d to which the connecting rod is pivoted at d' whilst the fulcrum e of
this intermediate lever d is allowed to rock or slide on any convenient part of the
loom. The curve in each of these levers d I make to correspond with part of
the circle described by the cranks a¹ so that the latter in completing their
revolutions run for a certain distance in the slots & without imparting motion to
the slotted levers d and thus to the slay b, during which pause I arrange the loom
so that the shed of the warp shall be open for the shuttle to pass.
To diminish friction I prefer to place upon each crank pin two or more anti-
friction bowls or rollers (not shown) which work in the slots of the levers d.
By preference I bring these rollers on the double bent crank by casting brass or
phosphor bronze or other metal separately or as one round the crank pins a¹ and
turn and finish and cut them into sections when required.

page_text: To give the desired dwell to the Jacquard, shaft machine, or shedding engine, one
or more levers with a slot (or slots) of the same design or principle as described for
the dwell of the slay is applied to the crank (or cranks) which produces the lift of
the Jacquard, or shaft machine, or shedding engine, the connecting rod (or rods)
being attached to the slotted lever (or levers) and acting in a similar manner to
that described for the connecting rods of the slay; one such slotted lever d² is
shown applied to the crank a' which produces the lift of the Jacquard, shaft
machine, or shedding engine; c¹ is the rod which connects the slotted lever d³ to
the Jacquard or equivalent shedding motion (not shown in the Drawings);
a simultaneous dwell being thus produced corresponding or nearly so with the
dwell of the slay. The crank a³ may be placed upon the crank shaft as shown or
upon the tappet shaft or other convenient shaft of the loom according to the
arrangement of the Jacquard, or other shedding motion.
I have described the Invention as applied to both the slay and the Jacquard, but
it might be used separately for either.
Figs. 4 and 5 show two slotted levers illustrating the manner in which the
duration of the dwell may be determined by varying the curve of the slot or loop
in the lever. Fig. 6 is a sectional plan of the slot or loop.
Having now particularly described and ascertained the nature of the said
Invention and in what manner the same is to be performed, I declare that what
I claim is
1. In a loom of the class herein specified, causing a dwell or pause in the
motion of the slay or lathe by connecting it to intermediate rocking or sliding
levers formed or provided with slots or loops of special curve in which the cranks
work, substantially in the manner and for the purposes herein set forth.
2. Causing a dwell or pause in the movement of the harness actuated by a
Jacquard, shaft machine, or shedding engine by the interposition of a rocking or
sliding lever with a slot or loop of special curve in which the driving crank works,
substantially in the manner and for the purposes herein set forth.
3. The combination with the slotted levers for causing a dwell or pause in the
motion of the slay or lathe of a loom, of the slotted lever or levers for causing a
dwell in the motion of the harness actuated by a Jacquard, or equivalent shedding
motion, substantially as herein set forth.