Improvements in Cotton Gins.
Year: 1892

page_text: Date of Application, 23rd June, 1892
Complete Specification Left, 18th Mar., 1893-Accepted, 29th Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in Cotton Gins.
1, BENJAMIN ALFRED DOBSON, Machine Maker, Bolton, in the County of
Lancaster, do hereby declare the nature of this invention, which has been com-
municated to me from abroad by Robert Roscoe, of Nagpore, India, Mill Manager,
to be as follows:-
This invention relates to improvements in cotton gins known as knife roller gins
for which Patents were granted to Benjamin Alfred Dobson, Thomas Henry
Rushton and William Dobson No. 434 of 1872 and Thomas Henry Rushton and
William Dobson No. 2378 of 1872, and is for the purpose of increasing the
production of these machines.
These machines have at present only one leather covered roller working in con-
junction with the knife roller; but according to these improvements an extra
leather covered roller is applied and placed at the back of the knife roller. This
leather roller being placed at the back and revolving in the same direction as the
front leather roller, a doctor knife is placed between and over the knife roller and
back leather roller, and is regulated in the same manner as the front doctor knife.
The driving of this back leather roller may either be direct and the front roller
be driven from it through gearing or vice versa-the knife roller having an inde-
pendent driving-or, each leather roller may have an independent driving and the
knife roller be driven from either of the leather rollers.
A further improvement consists in applying a spiked or fluted roller over the top
of the knife roller. This roller may be formed by threading small fingers on to a
square shaft and so arranged that, say, every fifth finger will be in a direct line
with the axis of the roller or an ordinary spiked or fluted roller may be used.
This spiked roller is set so as to clear the knife roller and front plate and pre-
ferably revolves in a contrary direction to and at a less speed than the knife roller.
When the cotton is fed on, the spiked or fluted roller grips it and pushes it on to
the knife roller, this in its turn revolving much quicker pushes it back to the spiked
or fluted roller again, and so the cluster of pods are broken up or separated with
great facility.
This spiked or fluted roller may be applied for the same purpose to an ordinary
knife roller gin.
D
11 CT. 1000
H. B. BARLOW,
Agent for Applicant.
COMPLETE SPECIFICATION
Improvements in Cotton Gins.
I, BENJAMIN ALFRED DOBSON, Machine Maker, Bolton, in the County of
Lancaster, do hereby declare the nature of this invention, which has been com
municated to me from abroad by Robert Roscoe, of Nagpore, India, Mill Manager
and in what manner the same is to he performed, to be particularly described and
ascertained in and by the following statement :-
This invention relates to improvements in cotton gins known as knife roller gins

page_text: for which Patents were granted to Benjamin Alfred Dobson, Thomas Henry
Rushton and William Dobson No. 434 of 1872 and Thomas Henry Rushton and
William Dobson No. 2378 of 1872, and is for the purpose of increasing the
production of these machines.
And in order that this invention may be fully understood and readily carried
into effect I will describe the accompanying sheet of drawings reference being had
to the figures and letters marked thereon.
The drawing represents a sectional side elevation of a cotton gin in which a is
the frame of the machine, a¹ the cross rails, the feed table from which the cotton
is pushed into the hopper c, d the knife roller and e the front or ordinary leather
covered roller, these rollers d and e running in opposite directions to one another;
placed on the under side and in contact with the roller e is a doctor knife ƒ secured
in position and regulated by a bolt g and spring washer h.
A second leather covered roller i is applied at the back of the knife roller d;
this roller runs in the same direction as the front roller e, and it is also, provided
with an adjustable doctor knife ; secured in its position and regulated by a bolt k
and spring washer 1; the three rollers d, e, and i are all driven in the directions
indicated by the arrows by any convenient arrangement of gearing or driving
mechanism not shown on the drawing, these parts may be of the usual or other
convenient construction.
My improvement consists in fitting a spiked roller m, driven in any convenient
manner in the hopper c, above the knife roller d; this roller may be constructed in
any convenient manner, for example, it may be formed by threading small fingers
upon a square shaft, or an ordinary spiked or fluted roller may be used.
This spiked roller m is set so as to clear the knife roller d and front plate and
preferably revolves in a contrary direction to and at a less speed than the knife
roller.
C
In operation when the cotton is fed into the hopper c the leather roller e and the
knife roller d work precisely as in the ordinary knife roller gin with a single leather
covered roller, the seed being stripped off between the doctor knife f and the
knife roller d and falling down the interstices of the grid n. Fibre with seed
that has not been operated upon is carried round to the leather roller i where
it is seized and drawn against the doctor knife j, the seeds being stripped off
fall into the spaces of the knife roller d and are carried round and dropped
through the grid n. Large lumps of cotton and clusters of pods when dropped
into the hopper if not suitable for working are immediately broken between the
knife roller d and the spiked roller m rendering the subsequent work easier.
The spiked or fluted roller m may be applied for the purpose herein described
to an ordinary knife roller gin with a single leather covered roller.
Having now particularly described and ascertained the nature of this said inven-
tion and in what manner the same is to be performed I declare that I am aware
that an additional leather covered roller and doctor knife have been applied and
placed at the back of the knife roller prior to this invention and to such I lay no
claim but what I claim is :-
In a knife roller cotton gin-
1. The combination with the knife roller, of a spiked or fluted roller substan-
tially as and for the purposes herein set forth.
2. The combination of parts embodying the improvement in cotton gins sub-
stantially as herein described with reference to the accompanying drawings.
Dated this 16th day of March 1893.
H. B. BARLOW & GILLETT,
17, St. Ann's Square, Manchester, Agents for Applicant.