IMPROVEMENTS IN LETTING OFF MOTION OF LOOMS
Year: 1885

page_text: THOMAS WATSON, 85 Springfield Terrace Falls Road, Belfast, Engineer and
GEORGE KIRK, 41 Springfield Road Belfast, Engineer, do hereby declare the nature
of our invention for IMPROVEMENTS IN LETTING OFF MOTION OF LOOMS, to be as
follows:-
The object of our Invention is to provide an attachment for looms whereby the
warp beam or warp beams is or are locked and the warp held taut when beating
weft in and is or are again relieved to the tread or shed by the mechanical motion
of the loom. This we effect by means of a brake arrangement on the end of the
warp beam the said brake being connected with the rocking rail of the lay or to
any other suitable moving part of the loom so that the brake is caused to lock the
warp beam when beating up and release it again for the shed-The ordinary
pacing weights should be lessened to reduce the strain during the time the beam is
not locked by the brake.

page_text: I THOMAS WATSON of 85 Springfield Terrace Falls Road Belfast Engineer and
GEORGE KIRK of 41 Springfield Road, Belfast, 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 object of our Invention is to provide an attachment for looms whereby the
warp beam or warp beams is or are locked and the warp held taut when beating
weft in, and is or are again relieved to the tread or shed by the mechanical motion
of the loom. This we effect by means of a brake arrangement on the end of the
warp beam the said brake being connected with the rocking rail of the lay or to
any other suitable moving part of the loom so that the brake is caused to lock the
warp beam when beating up the weft, and release the warp beam again for the
shed. The ordinary pacing weights should be lessened to reduce the strain during
the time the beam is not locked by the brake.
And in order that our Invention may be properly understood we will now
proceed to describe manners in which the same may be performed or carried into
practical effect the examples given shewing several ways in which the required
effect may be obtained from various moving parts of the loom. In each case only
Bo much of a loom is shewn as is necessary to illustrate the application of our
Invention thereto.
Figure 1 represents in Bide elevation partly in section and Figure 2 in back
view of part of our loom provided with means for locking or braking the warp
beam whilst the weft is being beaten in and for releasing it from such locking or
braking for the tread or shed. A is the warp beam to one end of which is a pacing
weight B applied in the usual way but at the other end of the said beam the
pacing weight there usually applied is dispensed with and there is fixed to the
beam a ring or collar C encircling which is a ring or bracket piece D secured to
the framing of the loom or otherwise fixed in position. A bushing of wood leather
or other suitable material E is applied between the collar C and the ring D a part E⁹
of the said bushing being pressed forcibly against the collar C each time the reed
is acting to beat in the weft so as to restrain and hold the warp beam immoveable
at that time and the said part E' of the said bushing being released from its
pressure on the collar C, during the periods at which the reed is not beating in the
weft. A lever G is centred at g to the ring D or to any other suitable fixed part
one end of the said lever being cam shaped so that when it is in one position it
presses the part E' upon the collar C to brake the warp beam and when it is in
another position it releases the warp beam from such braking action, the movement
of the said lever G to bring it into these positions at the proper times (videlicet
whilst the weft is being beaten in and during the shed respectively) being effected
by means of the rod H connected at one end to the tail of the lever G and at the other
end to the sword of the lay. It will be understood that the operation of the brake
may be effected from any suitable moving part of the loom For example the
rod H may be connected to the rocking rail instead of to the sword of the lay or
it may be operated from the crank arm as shewn in Figure 3. In this case the

page_text: rod His connected to a rod I vibrating on a stud i fixed to the side framing of the
loom the other end of the rod I being slotted and having a pin j on the crank arm
or connecting rod J engaging in the said slot so that as the crank moves the said
pinj vibrates the arm I on its centre which in turn operates the lever G through
the arm H to apply and release the brake at the required times as aforesaid.
Figure 4 shows how the lever G may be operated from the crank shaft the
eccentric thereon engaging in a strap on the rod H and being in such a position as
to apply the brake at the required times as aforesaid. Figure 5 shews the way in
which the lever G may be operated from the wiper shaft, a double wiper K
operating on the tail of the lever G and giving the breaking action at the required
times. It will be understood that the brake itself may be varied. For examples,
Figures 6 and 7, shew a mode of applying the brake by means of a rope or chain L
passing around a pulley M on the warp beam and attached at one end to the sword
of the lay and at the other end to the rail or any suitable fixed part so that as the
sword moves it puts the brake on the warp beam at the required times.
Having now particularly described and ascertained the nature of the said
Invention and in what manner the same is to be performed we declare that what
we claim is:
In looms, the combination with the warp beam or beams of a brake or locking
mechanism actuated by or from any suitable moving part of the loom so as to hold
the warp taut when beating up the weft but release it during the tread or shed
substantially as hereinbefore described, also the several arrangements of parts for
the purpose hereinbefore described and illustrated by the accompanying Drawings.
Date : 00-11 2000
THOMAS WATSON.
GEORGE KIRK.