AN IMPROVED WARP LETTING OFF MOTION FOR LOOMS
Year: 1885

page_text: I, DANIEL GREENHALCH of 96 Every Street, Burnley, Lancashire Loom Over-
looker, do hereby declare the nature of my invention for "AN IMPROVED WARP
LETTING OFF MOTION FOR LOOMS "
to be as follows:-
This Invention has reference to means to be employed for unwinding warp from
the warp beam in a self-acting manner whilst the loom is weaving, and this
I accomplish by making use of the ordinary vibrating rod, and a ratchet wheel
actuated by a catch and lever.
On the end of the warp beam I fix a worm wheel in gear with a worm which is
caused to rotate by the ratchet wheel mentioned above which is pushed forward a
tooth or so by a catch and horizontal lever, such lever being lifted by a cam on one
of the rotary shafts of the loom.
On one end of the vibrating rod I fix a short arm connected to a strong spiral
spring, and on the opposite end of said vibrating rod I fix another short arin which
is connected by chain or rod to the lever carrying the catch in gear with the
ratchet wheel. When this lever has been lifted by the cam so as to rotate the
ratchet wheel, the warp beam is caused to rotate on its axis, so to feed forward a
length of warp, but the warp so given out is immediately taken up by the
vibrating rod which is caused to oscillate upon its axis by the spiral spring, such
oscillatory motion causing the short arm on one end of the rod to lift the hori-
zontal lever clear of and out of contact with the cam, so that as the cam rotates it
does not for the time being operate the horizontal lever.
As the loom continues to weave the extra warp given out is used up, whereby
the vibrating rod is being gradually oscillated back and in doing so the short arm
on the end thereof lowers the horizontal lever onto the cam again, when it is again
lifted so as to push the ratchet wheel forward another tooth, consequently the warp
beam is again partially rotated, and delivers another length of warp to be taken up
by vibrating rod operated by the spiral spring and so on. By this means it will be
seen that an intermittent motion is given to the warp beam, but through the inter-
vention of the vibrating rod the warp between the rod and the breast beam is
always at the same tension; it will also be seen that the period between each
intermittent motion of the warp beam is not always the same, but is regulated by
the quantity of warp used up by weaving.
Dat the
1
TASKER & CROSSLEY,
Patent Agents,
Commercial Street, Halifax,
Agents for the Applicant..

page_text: An Improved Warp Letting off Motion for Looms.
"
I, DANIEL GREENHALGH of 96 Every Street Burnley, Lancashire, Loom Over-
AN IMPROVED WARP
looker, do hereby declare the nature of my invention for
LETTING OFF MOTION FOR LOOMS," and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement
This invention has reference to means to be employed for unwinding warp from
the warp beam in a self-acting manner whilst the loom is weaving, and this
I accomplish by making use of the ordinary vibrating rod and a ratchet wheel
actuated by a catch and lever.
On the end of the warp beam I fix a worm wheel in gear with a worm which is
caused to rotate by the ratchet wheel mentioned above which is pushed forward a
tooth or so by a catch and horizontal lever, such lever being lifted by a cam on one
of the rotary shafts of the loom.
In order that my Invention may be more fully understood, reference is made to
the accompanying Sheet of drawings, wherein Fig. 1 is end elevation, and Fig. 2
back elevation of so much of a loom as is necessary to illustrate my improvements.
A is loom frame, B tappit shaft, C vibrating rod, and D the warp beam, on one end
of which is a worm wheel E gearing with a worm F which said worm is keyed on
a stud carrying a ratchet wheel G. On one end of the vibrating rod C is a short
arm H connected by strong spiral spring I to a bracket fixed to the loom frame,
and on the opposite end of the vibrating rod is another short arm J connected to a
vertical rod K, the other end of which rod is connected to a horizontal lever L
working upon a fulcrum at M, whilst the opposite end of such lever carries a
link a attached to the lower end of the pawl or lever b engaged with the ratchet
wheel G. This pawl b is hinged to a short arm N placed loosely upon the stud
which carries the worm and ratchet wheel.
The action of the loom is as follows,-
The lever L rests upon the cam R, and as. the cam rotates, it lifts lever L so as to
cause the said lever to lift the catch b in doing which the ratchet wheel is pushed
forward a tooth or so according to arrangement, consequently the worm is rotated
and the warp beam is moved some little distance upon its axis thereby feeding or
paying out a length of warp, but the warp so given out is immediately taken up
by the vibrating rod which is caused to oscillate upon its axis by the spiral spring,
such oscillatory motion causing the short arm J to lift the horizontal lever L clear
of and out of contact with the cain, so that as the cam rotates it does not for the
time being operate the horizontal lever.
As the loom continues to weave, the extra warp given out is used up, conse-
quently the vibrating rod is being gradually oscillated back and in doing so the
short arm J commences to lower the horizontal lever onto the cam again, when it is
again lifted so as to push the ratchet wheel forward another tooth whereby the
warp beam is again partially rotated, and delivers another length of warp to be
taken up by vibrating rod, operated by the spiral spring and so on.

page_text: By these means it will be seen that an intermittent motion is given to the warp
beam, but through the intervention of the vibrating rod, the warp between the rod
and the breast beam is always at the same tension; it will also be seen that the
period between each intermittent motion of the warp beam is not always the same,
but is regulated by the quantity of warp used up by weaving.
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. In combination with the vibrating rod, the use of the short arm J,
rod K, and lever L operated by cam R for purposes set forth.
Secondly. In combination with parts marked J, K, L and M I claim the ratchet
wheel G for operating worm and wheel for the purpose of rotating the warp beam.
Thirdly. The means substantially as herein shewn and described for giving an
intermittent motion to the warp beam.