IMPROVEMENTS IN CARDING ENGINES
Year: 1884

page_text: We GEORGE ASHWORTH of the firm of Ashworth Brothers of the Rock Street
Works, Manchester in the County of Lancaster, and JOHN ALSTON HART of
Stockport in the County of Chester, do hereby declare the nature of the said
invention for "IMPROVEMENTS IN CARDING ENGINES" to be as follows :-
Our Invention relates to the means employed in the driving of the main cylinder
and the doffer during the process of grinding. In the ordinary method of driving
during the grinding the cylinder receives motion under the working conditions and
revolves at its working speed the speed of the doffer being accelerated so as to
have about the same surface speed as the main cylinder.
In order to obtain a better grinding effect we so arrange the driving of the doffer
as that its surface speed shall be reduced and we connect the doffer with the main
cylinder so as to impart to the said cylinder a corresponding surface speed. In
practice we prefer to arrange for the rotatory motion of the card surfaces to be less
than the reciprocatory movement of the grinder. To impart the required motion
to the doffer we mount a set of pullies to revolve upon one end of the doffer shaft
which is extended to receive the said pullies. One pulley is grooved to receive a
driving band which is mounted in the groove in the ordinary loose pulley on the
main cylinder shaft. The other pulley drives the pulley which imparts motion
through the ordinary gearing to the doffer the pulley being proportionately small
so that the speed of the doffer is reduced as compared with its ordinary working
speed. In practice we cast or form the said two pullies which we mount upon the
doffer shaft in one piece and fit the part to revolve upon a tube which can be fixed
on the doffer shaft by means of a set screw or of screws but we do not confine
ourselves to this construction nor to the exact combination of parts for effecting the
reduction in the speed of the card surfaces the important feature in our invention
being the slow movement of the surfaces being ground whereby we obtain greater
steadiness and improved results.

page_text: We GEORGE ASHWORTH of the firm of Ashworth Brothers of the Rock Street
Works Manchester in the County of Lancaster, and JOHN ALSTON HART of
Stockport in the County of Chester do hereby declare the nature of the said
Invention for IMPROVEMENTS IN CARDING ENGINES" and in what manner the
same is to be performed to be particularly described and ascertained in and by
the following statement and accompanying drawings:-
:-
"
Our Invention relates to the means employed in the driving of the main cylinder
and the doffer during the process of grinding. In the ordinary method of driving
during the grinding the cylinder receives motion under the working conditions
and revolves at its working speed the speed of the doffer being accelerated so as to
have about the same surface speed as the main cylinder.
In order to obtain a better grinding effect we so arrange the driving of the
doffer as that its surface speed shall be reduced and we connect the doffer with the
main cylinder so as to impart to the said cylinder a corresponding surface speed.
To impart the required motion to the doffer we mount a set of pullies to revolve
upon one end of the doffer shaft which is extended to receive the said pullies.
One pulley is grooved to receive a driving band which is mounted in the groove
in the ordinary loose pulley on the main cylinder shaft. The other pulley drives
the pulley which imparts motion through the ordinary gearing to the doffer the
pulley being proportionately small so that the speed of the doffer is reduced as
compared with its ordinary working speed.
In order that our Invention may be fully understood we will describe the same
with reference to the accompanying sheet of drawings made to a scale of about one
and a half inches to the foot. In the said drawings Fig: 1 is a side elevation
and Fig: 2 a plan of the parts of a carding engine which are necessary to the
illustration of our Invention. In the said Figs: a is the main cylinder b. the doffer
c. the main cylinder grinding roller and d. the doffer grinding roller. The attach-
ment which we apply to the ordinary engine for the purposes of our invention is
represented in section and drawn to an enlarged scale in Fig: 3 In this Fig:
e. and f. are two grooved band pulleys which are mounted to revolve upon a
sleeve g. the two pulleys being secured together as shown or if preferred they may
be cast or formed in one piece. The pulley f. is formed with two grooves to drive'
the two grinding rollers and has a boss . which is turned to serve as a strap pulley.'
The sleeve g. is bored to suit the size of the projecting end of the doffer shaft and
is provided with a set screw i. whereby the sleeve can be secured upon the shaft
which is extended to receive the attachment as aforesaid. In Figs: 1 and 2 the
attachment is represented in position upon the doffer shaft. When so mounted in
position the pulley e. is connected with the ordinary loose pulley j. which is upon
the main cylinder shaft by means of a band k. which is mounted in the groove in
the said loose pulley. A strap l. transmits motion from the small pulley h to the
ordinary pulley m. which gives motion to the doffer by means of the spur pinion n.
which gears with the spur wheel o. which is upon the doffer shaft. The main
cylinder and doffer are connected together by means of a strap p. on the other side
7

page_text: of the engine as is usual when grinding but according to our invention the doffer
drives the main cylinder. Bands r. r. mounted in the two grooves in the pulley f.
drive the two grinding rollers. We do not however confine ourselves to this
method of giving motion to the grinders. During the grinding operation the
pulleys e. f. and h receive motion from the loose pulley j. by means of the band h
and the pulley h. transmits the motion at a greatly reduced rate to the pulley m.
The motion is still further reduced by the gearing n. o. so that the doffer revolves
at a slow rate of speed. The main cylinder being driven from the doffer by means
of the strap p. revolves at a corresponding slow rate. We do not confine ourselves
to the exact combination of the parts for effecting the reduction in the speed of the
card surfaces the important feature in our invention being the slow movement of
the surfaces being ground whereby we obtain greater steadiness and improved
results.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed we declare that what
we claim is
1. The attachment for application to the doffer shaft of a carding engine
preparatory to the grinding of the carding surfaces substantially as and for the
purpose set forth and indicated herein before and in and by the accompanying
drawings.
2. In a carding engine transmitting motion from the main cylinder shaft or from
the loose pulley thereon to the pulley upon the pinion shaft of the doffer gearing,
through intermediate pulleys applied upon the doffer shaft so as to obtain a slow
card surface speed during the grinding substantially as set forth and indicated.
Dated this 1st day of May 1885