IMPROVEMENTS IN THE METHOD OF AND APPARATUS FOR CONNECTING TOGETHER INTERCHANGEABLE TAPPITS EMPLOYED IN LOOMS FOR WEAVING
Year: 1882

page_text: LETTERS PATENT to James Bywater of the firm of Pearson and Spurr of
Birstal near Leeds in the County of York, Machine Makers and Charles
Bedford of Birstal aforesaid, Foreman Mechanic for an Invention of
"IMPROVEMENTS IN THE METHOD OF AND APPARATUS FOR CONNECTING
TOGETHER INTERCHANGEABLE TAPPITS EMPLOYED IN LOOMS FOR WEAVING."
PROVISIONAL SPECIFICATION left by the said James Bywater and Charles
Bedford at the Office of the Commissioners of Patents on the 17th August
1882.
JAMES BYWATER of the firm of Pearson and Spurr of Birstal near Leeds in the
County of York, Machine Makers, and CHARLES BEDFORD of Birstal aforesaid
Foreman Mechanic "IMPROVEMENTS IN THE METHOD OF AND APPARATUS FOR
CONNECTING TOGETHER INTERCHANGEABLE TAPPITS EMPLOYED IN LOOMS FOR
WEAVING
"
This Invention has reference to the construction of loom interchangeable tappit
apparatus employed for operating healds in Looms for weaving.
Hitherto these loose tappits have been secured by bolts onto a grooved barrel,
and in some cases a number of tappits have been cast on the edge of discs or loose
plates which when arranged upon the tappit shaft were bolted together, but
neither of these methods were satisfactory, as when the grooved barrel was
employed only a very limited number of loose tappits could be attached around
the barrel, in consequence of the limited diameter of the barrel, and of space
required by the bolts which were employed to fasten down each tappit; whilst in
respect to that system where the tappits are cast on the edge of each plate the
great number of plates required for interchangeable purposes made them costly
and the inconvenience of changing one was a tedious process.
Our Invention consists in a new arrangement and combination of parts whereby
the loom tappits can be more expeditiously changed than at present, they are also
CD

page_text: held more firmly in position, and a greater number of tappits can be employed
not only circumferentially, but also more in width consequently more changes
can be made in the treading of the " gear shafts" and more shafts or healds
employed thereby.
For this purpose we employ a series of discs or loose plates having flanges or
rins thereon, in which are grooves or slots for receiving tongues or projections
formed on each tappit for keeping them in position in one direction; whilst they
are prevented from moving sideway by the adjoining disc which is similarly
provided with loose tappets, all of such discs being placed on the tappit shaft and
bound bodily together by bolts which pass through the whole series.
Other methods of securing the loose tappits without bolts may be employed such
as the tongues or projections being of dovetail form so as to fit into correspondingly
shaped grooves in the sides of the discs, or other male and female parts may be
arranged so that they can be easily exchanged.
By this arrangement any one of the loose tappits can be exchanged for others
or re-arranged by simply loosening the bolts connecting the discs together in order
that they may be moved apart a distance equal to the thickness of a tappit to allow
of its being withdrawn and another introduced.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said James Bywater and Charles Bedford in the Great Seal Patent Office
on the 17th February 1883.
JAMES BYWATER of the firm of Pearson and Spurr of Birstall near Leeds in the
County of York, Machine Makers, and CHARLES BEDFORD of Birstall aforesaid,
Foreman Mechanic "IMPROVEMENTS IN THE METHOD OF AND APPARATUS FOR
CONNECTING TOGETHER INTERCHANGEABLE TAPPITS EMPLOYED IN LOOMS FOR
WEAVING."
This Invention has reference to the construction of Loom interchangeable tappit
apparatus employed for operating healds in Looms for weaving
Hitherto these loose tappits have been secured by bolts on to a grooved barrel,
and in some cases a number of tappits have been cast on the edge of discs or loose
plates which when arranged upon the tappit shaft were bolted together; but neither
of these methods were satisfactory, as when the grooved barrel was employed only
a very limited number of loose tappits could be attached around the barrel, in
consequence of the limited diameter of the barrel, and of space required by the
bolts which were employed to fasten down each tappit, whilst in respect to that
system where the tappits are cast on the edge of each plate, the great number
of plates required for interchangeable purposes made them costly, and the
inconvenience of changing one was a tedious process.
Our Invention consists in a new arrangement and combination of parts whereby
the Loom tappits can be more expeditously changed than at present, they are
also held more firmly in position and a greater number of tappits can be employed,
not only circumferentially, but also more in width consequently more changes can
be made in the treading of the "gear shafts" and more shafts or healds employed
thereby.
For this purpose we employ a series of discs or loose plates having flanges or
rims thereon in which are grooves or slots for receiving tongues or projections
formed on each tappit for keeping them in position in one direction, whilst
they are prevented from moving sideway by the adjoining disc which is similarly
provided with loose tappits all of such discs being placed on the tappit shaft and
bound bodily together by bolts which pass through the whole series
In order that this Invention may be better understood we herein give reference
to the accompanying Sheet of drawings wherein Fig 1 is elevation of disc and
tappits and Fig 2 section of same. A is the tappit shaft on which are placed any
suitable number of discs or loose plates B to which loose tappits are attached.
These discs are provided with slots C, lugs or projections D and a rim or flange E.
The loose tappits G are provided with legs or projections H and are placed on the
face of the discs as shewn in the Drawing any suitable number being placed side
by side, all of which are bound together by bolt I passing through the slots C and
held secure by plate J and nut K.
Other methods of securing the loose tappits without bolts may be employed such
as the legs or projections H being of dovetail form so as to fit into or onto corre-
spondingly shaped parts L in the sides of the discs, or other male and female parts
may be arranged, so that they can be easily exchanged
It will thus be seen by any one conversant with the Trade that by this
arrangement a greater number of tappits can be put around the discs than by the
present arrangement, and the facility for removal and exchange is much handier
than any at present employed

page_text: By this arrangement any one of the loose tappits can be exchanged for others,
or they can be re-arranged by simply loosening the nut K sufficient as to be
moved apart a distance equal to the thickness of a tappit, so that it may be
withdrawn and another introduced.
Having now shewn and described our Invention, and the manner in which the
same is to be performed, we would have it understood that we do not confine
ourselves to the exact details herein shewn and described, as they may be varied
without departing from the main features thereof, but what we consider to be new
and claim is-
The method and means substantially as are herein shewn and described for
connecting interchangeable tappits employed in Looms for weaving.
In witness whereof we the said James Bywater and Charles Bedford have
hereunto set our hands and seals this Fifteenth day of February, in the year
of our Lord, one thousand, eight hundred and eighty three.
JAMES BYWATER.
(L.S.)
CHARLES BEDFORD (L.S.)