CERTAIN IMPROVEMENTS IN MACHINERY FOR SPINNING COTTON
Year: 1871

page_text: LETTERS PATENT to Thomas Henry Rushton, of the Firm of Messieurs
Dobson and Barlow, of Bolton, in the County of Lancaster, Machine
Maker, and Robert Tonge, of the same Place, Foreman, for the
Invention of "CERTAIN IMPROVEMENTS IN MACHINERY FOR SPINNING
COTTON
"
Scaled the 25th July 1871, and dated the 15th February 1871.
PROVISIONAL SPECIFICATION left by the said Thomas Henry Rushton
and Robert Tonge at the Office of the Commissioners of Patents,
with their Petition, on the 15th February 1871.
We, THOMAS HENRY RUSHTON, of the Firm of Messieurs Dobson and
Barlow, of Bolton, in the County of Lancaster, Machine Maker, and
ROBERT TONGE, of the same Place, Foreman, do hereby declare the
nature of the said Invention for "CERTAIN IMPROVEMENTS IN MACHINERY
FOR SPINNING COTTON," to be as follows:-
Our Invention relates to the cap bars for supporting the top rollers of
the drawing rollers, and it consists in making the said cap bars in two
parts. The cap bar for the back and middle row of fluted rollers is

page_text: supported by the slide in which the said fluted rollers revolve and con-
sequently move with them, and the cap bar for the front roller is fixed to
the stand or to the bearing of the front roller. By this arrangement
when the distance between the middle and front row is varied all the
top rollers remain in their proper relative positions; whereas when the
cap bars are constructed in the ordinary manner the supports of the
front top rollers have to be adjusted every time the distance between
the middle and front row of rollers is varied, or else fresh cap bars have
to be made.
According to our improvement the cap bar for the front top rollers
serves as a guard to the top cleaners, and prevents them falling; the
front fluted rollers can also be taken out without disturbing the top
rollers of the middle and back fluted rollers.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Thomas Henry Rushton and Robert Tonge in the
Great Seal Patent Office on the 12th August 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, THOMAS
HENRY RUSHTON, of the Firm of Messieurs Dobson and Barlow, of
Bolton, in the County of Lancaster, Machine Maker, and ROBERT
TONGE, of the same Place, Foreman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fifteenth day of February, in the
year of our Lord One thousand eight hundred and seventy-one, in the
thirty-fourth year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto us, the said Thomas Henry Rushton
and Robert Tonge, Her special licence that we, the said Thomas Henry
Rushton and Robert Tonge, our executors, administrators, and assigns,
or such others as we, the said Thomas Henry Rushton and Robert
Tonge, our executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"CERTAIN IMPROVEMENTS IN MACHINERY FOR SPINNING COTTON," upon the

page_text: condition (amongst others) that we, the said Thomas Henry Rushton
and Robert Tonge, our executors or administrators, by an instrument
in writing under our, or their, or one of our or their hands and
seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that we, the said Thomas Henry Rushton and
Robert Tonge, do hereby declare the nature of our said Invention, and
in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement (that is
to say) :-
Our Invention relates to the cap bars for supporting the top rollers of
the drawing rollers, and it consists in making the said cap bars in two
parts. The cap bar for the back and middle row of fluted rollers is
supported by the slide in which the said fluted rollers revolve and con-
sequently move with them; and the cap bar for the front roller is fixed
to the stand or to the bearing of the front roller. By this arrangement
when the distance between the middle and front row is varied all the
top rollers remain in their proper relative positions; whereas when the
cap bars are constructed in the ordinary manner the supports of the front
top rollers have to be adjusted every time the distance between the
middle and front row of rollers is varied, or else fresh cap bars have to
bo made.
According to our improvement the cap bar for the front top rollers
serves as a guard to the top clearers, and prevents them falling; the
front fluted rollers can also be taken out without disturbing the top
rollers of the middle and back fluted rollers.
And in order that our Invention may be fully understood and readily
carried into operation, we will proceed to describe the accompanying
Sheet of Drawings, reference being had to the figures and letters marked
thereon.
Fig. 1 is an elevation of a stand for a self-acting or hand mule to
which our improved cap bar is applied.
a is the roller beam; b, the stand; c, the front drawing roller revolving
in a bearing in the stand; d, is the middle and e the back drawing

page_text: rollers revolving in bearings in the slide f; c¹³, d³, and e¹ are the top
rollers. These parts are all made in the usual manner.
It has heretofore been customary to make the cap bars in which the
pivots of the top rollers revolve either in one casting or with loose nebs,
both of which modes of construction are objectionable; the former
mode involves the necessity of fresh cap bars when the distance between
the front and middle drawing rollers requires altering, and in the latter
great care and much time is required to adjust the position of the loose
nebs.
Now our Invention which consists in making the cap bars in two
parts obviates the objections to the former modes of construction.
On referring again to Fig. 1 it will be seen that the pivots of the front
top roller c¹ revolve in the cap bar g, shewn detached in Fig. 2, and
which is attached to the stand 6 by the screw g¹, and the pivots of the
middle and back top rollers d¹ and e¹ revolve in the cap bar h, which is
secured in the ordinary manner to the slide f. By this arrangement and
mode of construction when the distance between the front and middle
row of drawing rollers is varied all the top rollers retain their proper
relative positions with respect to the bottom rollers.
Fig. 3 is an elevation of a similar stand shewing a modification in the
mode of constructing our improved cap bars.
In this instance the cap
bar g fits in a slot in the stand b, and the connecting bar of the cap
bar passes between the front and middle row of rollers. This mode of
construction is suitable for fine spinning, as owing to the greater length
of staple in the cotton more distance is required between the front and
middle rollers, whereas the mode of construction shewn in Fig. 1 is
better adapted to shorter staple cotton, which requires less distance
between the front and middle rollers. In Fig. 1 also the connecting
bar of the cap bar serves as a guard to the top clearers i.
In both the arrangements shewn the front fluted rollers can be taken
out for cleaning or other purposes without disturbing the top rollers of
the middle and back row of fluted rollers.
Having thus stated the nature of our Invention, and described two
convenient modes of constructing the same, we wish it to be understood
that we do not limit ourselves to the details given, but that we claim as
our Invention making the cap bars of machines for spinning cotton in

page_text: two parts, one of which is fixed to the stand and the other to the slide
in the manner and for the purposes shewn and described.
In witness whereof, I, the said Robert Tonge, for myself and on
behalf of the said Thomas Henry Rushton, have hereto set my
hand and seal, this Tenth day of August One thousand eight
hundred and seventy-one.