Improvement in Loom Shuttle Guards.
Year: 1889

page_text: Date of Application, 12th June, 1889
Complete Specification Left, 10th Aug., 1889-Accepted, 14th Sept., 1889
PROVISIONAL SPECIFICATION.
Improvement in Loom Shuttle Guards.
I, PERCY HENRY MARRIOTT, of 23 Portland Street, Manchester, in the County of
Lancaster, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to shuttle guards or safety apparatus for preventing shuttles
from flying out of the loom. Ordinarily the bars or wires forming the guard are
attached to hinges and held in their position above the warp by means of springs,
which have to be stiff in order to prevent vibrations of the guard in quick running
looms and to offer sufficient resistance to the shuttle when deviating from its course.
This renders them liable to frequent fractures and makes it necessary for the weaver
to use both hands for turning the guard up against the top rail of the lathe and down
again when restarting the loom. The object of my invention is to dispense with
springs and to avoid the necessity of turning the guard down again when restarting
the loom, which 1 effect in the following manner:
I fix to the top rail of the slay two or more hinges, to the moveable flaps of which
a flat bar or wires forming the guard are fixed as usual. The lugs or bosses of the
fixed flaps of the hinges are provided with projections or ledges on which the move-
able flaps rest in a downward slanting position. In order to hold the guard in this
position above the warp, 1 form the boss of the moveable flap of one of the hinges,
by preference of that next to the starting handle of the loom, with a projecting lug
which is flat at the back and rounded or shaped like a lifting cam at the front. On
the fixed flap of the hinge I arrange a trigger so that it can freely slide in a vertical
direction. The lower end of the trigger is thickened and when in its lower position
fits between the fixed flap and the flat part of the lug on the boss of the moveable
flap, and thus holds the latter and guard firmly in its slanting position while the loom
is working. By pulling up the trigger above the lug, the moveable flap of the hinge
and the guard can be turned back against the top rail of the lathe. This can be done
with one hand, the trigger being lifted with one finger and the guard turned back
with another or the thumb. The trigger when let loose, drops down again against a
stop or the cam shaped serface of the lug. When the loom is started again and the
lathe beats up, the guard falls down again by its own inertia, the cam shaped surface
of the lug lifting the trigger till it passes off this surface, when it drops again by its
weight behind the flat part of the lug and locks the guard in its slanting position.
By preference the lower part of the trigger is made slightly wedge shaped so as to
insure a tight fit between the fixed flap of the hinge and the flat part of the lug and to
compensate the wear of these parts.
Dated thia 11th dose of Inne 1880
EMMOTT & Co.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvement in Loom Shuttleguards.
I PERCY HENRY MARRIOTT of 23 Portland Street, Manchester in the County of
Lancaster, 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 :-
My invention relates to shuttle guards or safety apparatus for preventing shuttles
from flying out of the loom. Ordinarily the bars or wires forming the guard are
attached to hinges and held in their position above the warp by means of springs, which

page_text: This
have to be stiff in order to prevent vibrations of the guard in quick running looms
and to offer sufficient resistance to the shuttle when deviating from its course.
renders them liable to frequent fractures and makes it necessary for the weaver to use
both hands for turning the guard up against the top rail or cap of the lathe and down
again when re-starting the loom. The object of my invention is to dispense with springs
holding the guard in position and to avoid the necessity of turning the guard down
again when restarting the loom, while obviating the complicated arrangements of
other selfacting shuttleguards connected by links or other parts to the starting handle
of the loom, which I effect by means of an improved self locking hinge.
On the sheet of drawings appended hereunto,
Fig. 1 shows a front view of the lathe cap with the shuttle guard attached to it.
Fig. 2 a front view of one arrangement of my improved self locking hinge.
Figs. 3 and 4 cross-sections of the same in different positions.
g
I fix to the top rail or cap e of the lathe two or more hinges b, to the moveable flaps
of which a flap bar a or wires forming the guard are fixed as usual. The lugs or
bosses of the fixed parts g of the hinges are provided with projections or ledges k on
which the moveable flaps e rest in a downward slanting position as shewn by figs. 2
and 3. In order to hold the guard in this position above the warp, I form the boss of
the moveable flap of one of the hinges, by preference of that next to the starting
handle of the loom, with a projecting lug, which is flat at the back and insert
between this lug and the fixed part 9 of the hinge a trigger h which fits between these
parts and thus holds the moveable flap and guard firmly in its slanting position while
the loom is working. By pulling up the trigger above the lug. the moveable flap e
of the hinge, and the guard a can be turned back against the lathe cap c into the
position shown by fig. 4. This can be done with one hand, the trigger being lifted
with one finger and the guard turned back with another or the thumb. The trigger h
may be guided by means of a square on the stud d and slot in the trigger as shown.
When released it drops down to the end of the slot, or upon the lug f. The front of
the lug is rounded or shaped similarly to a lifting cam. When the loom is started
again, the guard a falls down again by its own inertia at the first beating up. The
cam shaped surface of the lug f lifts the trigger till it passes this surface, when it
drops again by its own weight behind the flat part of the lug and locks the guard in
its slanting position. By preference the part of the trigger fitting between the log f
and part g of the hinge is made wedge shaped as shewn so as to insure a tight fit and
to compensate for the wear of these parts. Obviously the sliding trigger may be
replaced by an equivalent latch moveable on a pivot, the lug on the moveable flap
being so shaped that it holds the latch up when the flap is turned back or moves it
out of the way when the flap is falling down into its slanting position similarly as
herein before described with reference to the trigger h.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed, I declare that what I claim is
Firstly, a hinge for shuttleguards having a lug or projection on the moveable flap
in combination with a trigger or its equivalent fitting between said lug or projection
and the fixed part of the hinge and so arranged that when the guard has heen turned
back and falls down again said trigger or its equivalent slides selfactingly between
said lug or projection and fixed part and locks the guard in its slanting position,
substantially as herein before described.
Secondly, in hinges for shuttle guards lugs or projections f on the moveable flaps e
in combination with triggers or their equivalents substantially as hereinbefore
described and illustrated by the drawings and for the purpose set forth.
Did thin 14
1000
EMMOTT & Co.,
Agents for the Applicant.