Improvements in Frictional Devices for Letting off the Warp in Weaving Looms.
Year: 1897

page_text: Date of Application, 16th Dec., 1897--Accepted, 30th Apr., 1898
COMPLETE SPECIFICATION.
Improvements in Frictional Devices for Letting off the Warp in
Weaving Looms.
JOIN HERRIN, Weaving Overlooker, and also ALBERT HERRIN, Weaving Over-
looker, 2, Booth Street, WILLIAM HENRY HORNER, Manager, 9, Station Road,
JOHN BARKER, Mechanic, 11, North Parade, all of Burley-in-Wharfedale, York-
shire, 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 has for its object the construction of an apparatus by which
friction may be applied to the warp beams of looms, in such a manner that the
necessary amount of friction required for what is termed "letting off the warp"
may be readily adjusted to suit the requirements of the fabric and strength of
warp in the loom and also to so arrange the mechanism that the friction may be
instantly removed and the warp beam left free when required.
In carrying out our invention we secure to some convenient portion of the loom
frame a bracket upon which one end of the warp beam is carried and above the
warp beam is secured another bracket to which is mounted a lever prepared for
receiving one end of a bar connected to a friction clip resting on the beam collar
or the like and between the said friction clip and lever is placed a suitable spring.
The lever is of such a length as to engage with a projection on a sliding block
operated by a screw so that when the lever is engaged with the projection and the
block slided in one direction the spring is compressed and pressure applied to the
collar or the like on the warp beam thereby retarding the free rotation of the same
in accordance with the requirements of the " let-off" of warp for the fabric and
the strength of warp threads.
On the attendant applying pressure to the lever the same may be disengaged
with the before named projection thereby instantly liberating the warp beam in
a manner that it may be readily rotated on its bearings.
A similar arrangement may be provided to support the other end of the beam.
To fully describe our invention reference is made to the accompanying sheet of
drawings forming a part of this specification, in which similar letters of reference
indicate corresponding parts in each of the figures.
Figure 1, represents a back view of a portion of the side frame of a loom and
the end of a warp beam with our improved let off device applied thereto.
Figure 2, is a plan view, and Figure 3, is a side view of the same.
The beam A is preferably removed from the bearing B in the side frame B
and it is supported in the friction bearing C embracing the collar A2 of the beam.
The bearing C is fixed to the bracket D bolted to the frame 132, and the other end
of the beam is preferably supported in a similar way. Figure 4, represents a
separate view of one of the friction bearings.
A friction clip E similar to C is placed over the collar A2 and this clip is retained
in position by the rod F one end of which is screwed into it and the other projects

page_text: up through the hole G formed through the lever H mounted on the stud J pro-
jecting from the bracket K bolted to the frame B². A spiral spring L is mounted
on the rod F and is more or less compressed by the lever H against the top of the
clip E according to the tension required on the warp. The pressure of the lever
on the spring is regulated by the block M bearing upon said lever. This block
fits the slide slot N formed in the bracket K and is adjusted by the screw O and
hand wheel P. A handle or extension R is made on the lever H so that it may be
readily disengaged from the block when required to remove the pressure from
the beam. A similar friction clip and its appurtenances is preferably provided
at the other side of the loom.
To increase the friction of the bearings C and clips E on the collars A² wrought
iron shoes S are riveted to the inside of such bearings and clips and these shoes
do not extend to the middle portion of the bearing.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:
1. The combination with the friction bearing C, of the clip E the pressure of
which is regulated by a spring, lever and screw, substantially as herein shown and
described and illustrated in the accompanying drawings.
2. The combination with the friction bearing C provided with wrought iron
shoes of the clip E having similar shoes, substantially as herein shown and
described.
Dotadth 144h If
1907
JOHN HERRIN.
ALBERT HERRIN.
WM. HENRY HORNER.
JOHN BARKER.