IMPROVEMENTS IN MACHINERY OR APPARATUS FOR SPINNING AND DOUBLING COTTON AND OTHER FIBROUS MATERIALS
Year: 1881

page_text: LETTERS PATENT to Thomas Coulthard, of Preston, in the County of
Lancaster, Machinist, for an Invention of "IMPROVEMENTS IN MACHINERY OR
APPARATUS FOR SPINNING AND DOUBLING COTTON AND OTHER FIBROUS
MATERIALS."
PROVISIONAL SPECIFICATION left by the said Thomas Coulthard at the
Office of the Commissioners of Patents on the 23rd July 1881.
THOMAS COULTHARD, of Preston, in the County of Lancaster, Machinist.
"IMPROVEMENTS IN MACHINERY OR APPARATUS FOR SPINNING AND DOUBLING
COTTON AND OTHER FIBROUS MATERIALS."
This Invention of improvements in machinery or apparatus for spinning and
doubling cotton and other fibrous materials relates to an improved construction of
adjustable ring-holder for double flanged rings employed in ring and traveller
frames. The improved ring-holder is designed to obviate the necessity of springing
or bending the holder to allow of the lower flange of a double ring being introduced
within the jaws or lips of the holder, and consists of a flat annular ring of sheet
metal whose central opening is large enough to pass easily over the ring. Three
jaws or lips project inwardly at such points or positions of the central opening as
to allow of the introduction between the lips of the lower flange of the ring, the
lips being arranged to rest upon the upper side of the lower flange of the ring.
The projecting edges of the jaws or lips are so formed relatively to the thickness of
the ring flange, that by means of holding down screws the lips will be caused to
press upon the ring, which, along with the ring holder, will be securely fastened to
the ring-rail by the same operation.
The screw openings are of such a width and length relatively to the diameter of
the holding down screws, which are provided with heads of suitably large diameter
as to permit of the ring-holder and the ring being adjusted to a position concentric
with the spindle.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Thomas Coulthard in the Great Seal Patent Office on the 21st
January 1882.
THOMAS COULTHARD, of Preston, in the County of Lancaster, Machinist.
"IMPROVEMENTS IN MACHINERY OR APPARATUS FOR SPINNING AND DOUBLING
COTTON AND OTHER FIBROUS MATERIALS."
This Invention of improvements in machinery or apparatus for spinning and
doubling cotton and other fibrous materials relates to an improved construction of
ring holder for double flange rings employed in ring and traveller frames. The
improved ring holder is designed to obviate the necessity of springing or bending
the holder to allow of the lower flange of a. double ring being introduced within
the jaws or lips of the holder, and consists of a flat annular ring of sheet metal,
whose central opening is large enough to pass easily over the ring.
Three jaws or
lips project inwardly at such points or positions of the central opening as to allow
of the introduction between the lips of the lower flange of the ring, the lips being
arranged to rest upon the upper side of the lower flange of the ring.
In the accompanying Drawings Fig. 1 is a plan view and Fig. 2 a side view
(partly in section) of my improved ring holder shewing the mode of securing a
double ring to the ring rail.
a is a double ring, that is to say, a ring having two flanges or races 1 and 2;
b is my improved holder provided with the lips or projections c, c, c, which rest
upon the upper side of the lower flange 2 of the double ring a. (A portion of the
upper flange 1 of the double ring a is omitted in Fig. 1 in order that the position
of the jaws or lips c in relation to the lower flange 2 of the double ring a may be
better understood.) The central opening d of the holder b is made large enough
to clear the ring flanges 1 and 2 (see Fig. 1). The distances between the inner
edges of the lips c, c, c, are such that the lower flange 2 of the ring a may be
passed in a slanting direction through the central opening and then brought
beneath the lips c, c, c, each of which will overlap the flange 2 to the extent of
about one half of the said flange. The projecting edges of the jaws or lips c, c, c,
are so formed relatively to the thickness of the ring flange that by means of the
holding down screws e, e, e, the lips c, c, c, will be caused to press upon the ring a,
which, along with the ring holder d will be securely fastened to the ring rail
the same operation. The screw openings 9 are of such a width and length
relatively to the diameter of the holding down screws which are provided with
heads of suitably large diameter as to permit of the ring holder b, and the ring a
being adjusted to a position concentric with the spindle.
.
by
My improved holder is more particularly designed for rings of large diameter, so
that they may be firmly screwed down to the ring rail without liability to bending,
straining, or otherwise deforming the ring commonly experienced with large rings
when only two holding down jaws or lips are employed.
Having now described the nature of my said Invention, and the manner in
which the same is or may be performed, I desire it to be understood that what I
claim as secured to me by the herein before in part recited Letters Patent is as
follows, that is to say:-A ring holder having three holding down jaws constructed,

page_text: arranged, and operating substantially as described and shewn in the Drawings for
the purpose specified.
In witness whereof, I, the said Thomas Coulthard, have hereunto set my
hand and seal, this Nineteenth day of January, in the year of our Lord
One thousand eight hundred and eighty two.
THOMAS COULTHARD. (L.S.)