Improvements in Shuttle Stop-rod Tension Devices for Looms.
Year: 1891

page_text: Date of Application, 21st Jan., 1891
Complete Specification Left, 1st Oct., 1891-Accepted, 28th Nov., 1891
PROVISIONAL SPECIFICATION.
Improvements in Shuttle Stop-rod Tension Devices for Looms.
I, HEINRICH OTTO, of Reichenbach a Fils near Plochingen Wurthemberg,
Germany, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to a tension device for the stop-rods of looms with
stationary reeds whereby any irregularity in the swinging motion of the stop-rod
is prevented whatever the speed of motion of the rail and the shuttle is enabled
freely to enter or leave the shuttle-box as the tension-device only acts while the
shuttle is in motion and remains inoperative all the time elapsing between
the moment preceding the entrance of the shuttle into the box and its issue
therefrom.
The brake device for the shuttle in the box is of the well-known construction
and entirely independent of the stop-rod mechanism.
In similar devices hitherto known the required tension is effected by a spring
acting upon the stop-rod tongue. This tension is therefore permanent and the
shuttle as it enters or leaves its box has to overcome not only the pressure of the
brake-spring but also the pulling strain of the stop-rod spring which necessitates a
more powerful impact on the part of the shuttle or in other words more motive
power.
The tension device herein described does not come into operation till the moment
arrives when tension is absolutely necessary while before and after that time it
remains perfectly inoperative thus enabling shuttles of less power to be used.
When the rail is in its rearmost position the lever by virtue of its inertia has the
tendency to remain behind, which if it was allowed to do would make the action of
the shuttle-guard unreliable. But at that moment the lever comes in contact with
buffer-pins controlled by adjustable springs. The lever is thereby pressed against
the catch of the shuttle-box and held in this position until the lever owing to the
weight of the tongue can of itself retain its position in contact with the catch.
Should the shuttle happening to be in motion at a given moment of the operation
of the tongue device fail to reach the shuttle-box the tongue remains in its lower-
most position and as the rail moves forward catches the tappet of the brake-block
which it moves forward upon the side frame and through the medium of an arm
disengages the stop lever and instantaneously stops the loom. When however the
shuttle has duly entered the box it must thereby have pressed outwardly the catch
and the lever and as the stop-rod which carries the tongue turns round, the tongue
is raised off the tappet. At the moment when the shuttle leaves its box the lever
has not had time to come in contact with the buffer so that it has only to overcome
the insignificant weight of the tongue. The shuttle stop rod is provided with
tongues at both ends and the buffer device only acts upon one stop-rod lever.
Dated this 8th day of January 1890.

page_text: COMPLETE SPECIFICATION.
Improvements in Shuttle Stop-rod Tension Devices for Looms.
I, HEINRICH OTTO of Reichenbach à Fils near Plochingen, Würtemberg in the
Empire of Germany, 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 :-
This invention relates to a tension device for the stop-rods of looms with
stationary reeds, whereby any irregularity in the swinging motion of the stop-rod
is prevented whatever the speed of motion of the rail and the shuttle is enabled
freely to enter or leave the shuttle-box as the tension-device only acts while the
shuttle is in motion and remains inoperative all the time elapsing between the
moment preceding the entrance of the shuttle into the box, and its issue
therefrom.
The brake device for the shuttle in the box is of the well known construction and
entirely independent of the stop rod mechanism.
In the accompanying drawing
Figure 1 is a side elevation of the loom the tension or buffer device being shown
in section. When the rail is in the position here shown, the shuttle has just
entered the shuttle-box and raised the stop-rod tongue. The buffer arrangement
at this moment is inoperative.
Figure 2 is another side view of the loom. The rail is here shown in its rearmost
position and the shuttle assumed to be in motion. The buffer arrangement there-
fore is in operation and performs the necessary tension on the stop rod.
In similar devices hitherto known the required tension is effected by a spring
acting upon the stop-rod tongue a. This tension is therefore permanent and the
shuttle as it enters or leaves its box has to overcome not only the pressure of the
brake-spring, but also the pulling strain of the stop-rod spring which necessitates
a more powerful impact on the part of the shuttle, or in other words, more motive
power.
The tension device herein described does not come into operation till the moment
arrives when tension is absolutely necessary, while before and after that time it
remains perfectly inoperative, thus enabling shuttles of less power to be used.
When the rail B is in its rearmost position, the lever a¹ by virtue of its inertia
has the tendency to remain behind, which, if it was allowed to do, would make the
action of the stop rod unreliable. But at that moment the lever a' comes in contact
with the buffer-pins e supported by b and controlled by adjustable springs. The
lever a¹ is thereby pressed against the catch d of the shuttle-box and held in this
position until the lever a', owing to the weight of the tongue a can of itself retain
its position in contact with the catch d. Should the shuttle happening to be in
motion at a given moment of the operation of the tongue device, fail to reach the
shuttle-box the tongue a remains in its lowermost position and as the rail B moves
forward catches the tappet of the brake-block F which it moves forward upon the
side frame A, and through, the medium of the arm y disengages the stop-lever
and instantaneously stops the loom. When, however, the shuttle s has duly entered
the box, it must thereby have pressed outwardly the catch d and the lever a and
as the stop-rod i which carries the tongues, turns round, the tongue a is raised off
the tappet (Figure 1). At the moment when the shuttle leaves its box the
lever a has not had time to come in contact with the buffer so that it has only to
overcome the insignificant weight of the tongue. The stop-rod i is provided with
tongues a at both ends and the buffer device only acts upon one stop-rod lever.
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 1
claim is :-
1. A tension device for the shuttle stop-rod of looms with stationary reeds

page_text: whereby through the action of a buffer the swinging motion of the stop rod where it
is objectionable is prevented it being only allowed to act while the shuttle is in
motion and caused to remain inoperative during the time elapsing between the
entrance of the shuttle into and its issue from the shuttle-box substantially as
described.
2. In a tension device for the shuttle stop-rod of looms the combination with the
stop-rod lever of a buffer as c substantially as described and illustrated in the
accompanying drawings.
3. In a tension device for the shuttle stop-rod of looms the combination of
catch d lever a buffer c rod i and tongue a substantially as described and illustrated
in the accompanying drawings.
4. In a tension device for the shuttle stop-rod of looms the combination with the
rail B of catch & lever a' buffer c rod i and tongue a substantially as described and
illustrated in the accompanying drawings.
Dated this 1st love of haben 1001
W. P. THOMPSON & BOULT,
Agents for the Applicant.