AN IMPROVED LET-OFF MOTION FOR LOOMS
Year: 1884

page_text: We, GEORGE TILLOTSON of 4 Queen Street, Saltaire Road, Shipley, Mechanic,
and JOHN DEAN of 11 Barrett Street, Shipley, Manager, in the County of York, do
hereby declare the nature of our invention for AN IMPROVED LET-OFF MOTION FOR
LOOMS to be as follows:-
This invention relates to certain improvements in warp beam regulators for
Looms and has for its object the equalisation of the tension on the supply of the
warp from the beam to the loom for weaving.
We accomplish our object by bolting to one side of the frame of the loom a
bracket for carrying one end of the warp beam which fits into prepared recesses in
a flange-this flange along with the warp beam revolves in the operation of
weaving in a flanged segment of a circle fixed to the before mentioned bracket. In
order to retain the prepared flange of warp beam in its position in the flanged
segment of a circle a small guide is also fixed to the bracket on the opposite side of
the warp beam flange which is capable of adjustment in order to put more or less
friction upon the flange of the warp beam end by moving the guide in case of more
friction being required towards the horizontal centre of the warp beam and in case
less is required towards the vertical centre. It will be readily seen that in our
improvement that this end of the warp beam is not carried as hitherto in an
ordinary journal: this however is the case with the opposite end of the beam used
in carrying out our improvement. The journal is constructed at both ends alike
for the purpose of dressing and pulling the warp on to the beam. The bracket and
lifter are prepared so that this journal when in the loom works entirely free.
When it is desired to pull back, by means of a lifter working in a recess in the
before mentioned bracket we are enabled by an eccentric actuated by hand to lift
the warp beam out of the flanged segment and guide thereby liberating the warp
beam from the friction caused by its weight, when at work, resting in the segment
and guide by hand when so lifted the warp beam is revolved as desired. This
eccentric is centred to the bracket at the top or bottom of the flange thus forming
and additional guide to retain the flange in its position.
WAUGH & CHAPMAN,
Agents for the Applicant.

page_text: CUMI LIE
DEPOTTICATION
We GEORGE TILLOTSON, of 4 Queen Street Saltaire Road, Shipley, Mechanic,
and JOHN DEAN, of 11 Barrett Street, Shipley, Manager, in the County of York,
do hereby declare the nature of our invention for "AN IMPROVED LET-OFF
MOTION FOR LOOMS" and in what manner the same is to be performed, to he
particularly described and ascertained in and by the following statement :-
This invention relates to certain improvements in warp beam regulators for
looms, and has for its object the equalization of the tension on the supply of the
warp from the beam to the loom when weaving; and consists in securing a bracket
to one side of the loom for carrying one end of the warp beam, on which is placed a
collar having projections that fit into recesses formed in a flange that rests on a
flanged segment and adjustable guide pin or stud attached to the said bracket. In
a recess formed in the bracket is mounted a slide having a foot thereon, and at the
top of the said bracket is an eccentric which pressure is put on the said fange when
moved in one direction; and on the removal of the pressure the warp beam may
be raised for the purpose of letting off additional warp for "pulling back."
In the accompanying drawings Fig 1, represents the back portion of a loom and
warp beam fitted with our improved let-off motion. Fig 2 is a back view of the
bracket. Fig 3, a front view and Fig 4, an end view of the same.
The bracket A forming part of our improved apparatus, is bolted to the loom end
frame for supporting and regulating the tension of the warp on beam B; the other
end of the beam being carried by bracket C. On to one end of the warp beam B,
is secured a circular collar on which are formed two or more projections that fit
into the corresponding hole and recesses D in flange E, prepared with a straight
surface on the side that is against the bracket A, but on the other side for some
distance from the circumference to the centre it is taper. The flange E. carrying
the warp beam rests in the recess of the flanged segment F. and the flanged guide
pin or stud G; the latter of which on adjustment in the curved slot hole, regulates
the amount of friction required to turn the warp beam.
Mounted in a recess in the said bracket is slide H prepared with a projecting
foot Hat the bottom, and near to the top of the bracket is fitted a cam or
eccentric J having a lever or arm J' attached thereto. By pressing the cam or
eccentric J. to the position shewn by Fig 3 the flange E is gripped between the
segment, stud and cam, thereby putting friction on the flange and thus preventing
the warp being easily let-off; and by the weight of the warp and beam being
carried by the flange E resting on the flanged segment F and stud G in the manner
described, additional friction is required to turn the warp beam on its axis which
will gradually reduce as the warp is let off the beam.
When the beam B is full of warp more power is required to move the same than
when empty, but as the circumference of the warp at full beam is further from the
centre of the beam, than when empty practically the same amount of power is
required to turn the beam. and let off the warp from full beam to empty; because
as the diameter of the warp and the leverage or distance to the centre decrease, the
weight resting on the segment F, and stud G decrease also in the same proportion,
by which the warp is let-off uniformily throughout its length.

page_text: When it is desired to "pull back," the eccentric or cam J is liberated, then the
warp beam may be slightly raised by lever or arm J¹ and cain J' until clear of the
flanged segment and guide pin, thereby liberating the warp beam from the friction
caused by its own weight, resting on the segment and guide so that it can be turned
as described.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is
The combination of the flange E with segment F and guide pin G substantially
in the manner and for the purpose as hereinbefore described and illustrated by the
accompanying drawings.
The combination of the flange E with the cams J and J' arranged substantially
in the manner and for the purpose set forth.
WAUGH & CHAPMAN,
70, Chancery Lane, W.C.