IMPROVEMENTS IN THE CONSTRUCTION OF LOOMS FOR WEAVING
Year: 1883

page_text: LETTERS PATENT to George Alfred Shiers, and Abraham Wright, both of
Oldham in the County of Lancaster, for an Invention of IMPROVEMENTS IN
THE CONSTRUCTION OF LOOMS FOR WEAVING
PROVISIONAL SPECIFICATION left by the said George Alfred Shiers &
Abraham Wright at the Offico of the Commissioners of Patents on the
11th January 1883.
GEORGE ALFRED SHIERS and ABRAHAM WRIGHT both of Oldham in the
County of Lancaster "IMPROVEMENTS IN THE CONSTRUCTION OF LOOMS FOR
WEAVING
"
This invention relates to that part of a loom known as the "tappet motion "
which is employed for the purpose of actuating the healds for effecting the shedding
of the warp threads, and more especially to apparatus for working that class of
tappets known as oscillating tappets.
The objects of the invention are to give greater facility for altering or setting
the "peg wheel" either carlier or later as may be required, and to give more room
than hitherto for passing round the back of the loom.
Instead of mounting the oscillating tappets above the loom as hitherto practised
we mount them loosely on the tappet shaft so that they can rock or oscillate
thereon and we give the rocking or oscillating motion thereto by the following
means.
In gear with a spur wheel keyed on the crank shaft we mount a similar wheel
carried in a stud fixed in a bracket bolted to the loom side. This second spur
wheel has a crank pin fixed in one side which is connected by a link to a similar
pin fixed in a lever mounted on a stud carried by a bracket at the back of the loom
and thus the revolution of the spur wheel communicates a to and fro motion to the
lever. At a point on this rocking lever further from the fulcrum is fixed a second
pin which is connected by a second link to a convenient part of the oscillating
tappet and by this means the requisite alternate rocking or oscillating motion is
given to the said tappet.
In some cases we propose to dispense with the rocking lever and the second link
and to connect the crank pin on the spur wheel direct to the oscillating tappet, but
in this case the crank pin will have to be further from the centre of the spur wheel
in order to give the requisite amount of oscillating movement to the tappet.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said George Alfred Shiers & Abraham Wright in the Great Seal
Patent Office on the 10th July 1883.
GEORGE ALFRED SHIERS and ABRAHAM WRIGHT both of Oldham in the
County of Lancaster IMPROVEMENTS IN THE CONSTRUCTION OF LOOMS FOR
WEAVING
This invention relates to that part of a loom known as the tappet motion
which is employed for the purpose of actuating the healds for effecting the shedding
of the warp threads, and inore especially to apparatus for working that class of
tappets known as oscillating tappets.
The objects of the invention are to give greater facility for altering or setting.
the "peg wheel" either earlier or later as may be required and to give more room
than hitherto for passing round the back of the loom.
Such being the nature and object of our said Invention we will now proceed to
describe in detail the manner in which the same is to be or may be performed or
carried into practical effect and in order that the same may be clearly understood
we have annexed hereunto a sheet of drawings illustrative thereof and have marked
the same with figures and letters of reference corresponding with those in the
following explanation thereof.
Fig. 1. in the annexed drawings is an elevation of a loom side with our invention
shown as applied thereto.
Instead of mounting the oscillating tappet a, a above the loom as hitherto
practised we mount them loosely on the tappet shaft b, b at the side of the loom
below the crank shaft and so that they can rock or oscillate on the said tappet
shaft, and we give the rocking or oscillating motion thereto by the following
means. In gear with a spur wheel c, c keyed on the crank shaft d, d we mount a
similar wheel e, e carried on a stud fixed in a bracket f, f bolted to the loom
side g, g. This second spur wheel e, e has a crank pin / fixed in one side which is
connected by a link i, i to a similar pink fixed on a lever l, & mounted on a stud m
carried by a bracket at the back of the loom and thus the revolution of the spur
wheel c, c communicates a to and fro motion to the lover l, l.
At a point on this rocking lever further from the fulcrumn is fixed a second pin n
which is connected by a second link o, o to a convenient part of the oscillating
tappet a, a and by this means the requisite alternate rocking or oscillating motion
is given to the said tappet. In some cases we propose to dispense with the rocking
lever, and the second link o, o and to connect the crank pin on the spur
wheel e, e direct to the oscillating toppet a, a as shown at Fig 2. or in any
convenient manner.
It will thus be evident that by the use of our invention the rocking or oscillating
motion is imparted to the tappets from the crank shaft quite independently of the
peg-wheel so that the latter can be altered or set either sooner or later when
required without interfering with the rocking action of the tappets.
"
Having now described the nature and object of our said Invention together with
the manner in which the same is to be or may be performed or carried into
practical effect, we wish it to be understood that we claim as our invention
mounting the oscillating tappets at the side of the loom and imparting the rocking
or oscillating motion thereto from a crank pin mounted in a spur wheel in gear

page_text: with a similar wheel fixed on the end of the crank shaft substantially in the
manner and for the purposes herein before set forth and illustrated by the drawings
annexed.
In witness whereof I the said George Alfred Shiers (on behalf of myself and
the said Abraham Wright) have hereunto set my hand and seal this
seventh day of July in the year of our Lord one thousand eight hundred
and Eighty three.
GEORGE ALFRED SHIERS (L.S.)