IMPROVEMENTS IN APPARATUS FOR GRINDING THE CARD COVERED SURFACES OF PORTIONS OF THE CARDING ENGINES EMPLOYED IN THE PREPARATION OF COTTON AND OTHER FIBROUS MATERIALS
Year: 1870

page_text: LETTERS PATENT to Joseph Standring Dronsfield, of the Firm of
Dronsfield Brothers, Machinists, of Oldham, in the County of
Lancaster, for the Invention of "IMPROVEMENTS IN APPARATUS FOR
GRINDING THE CARD COVERED SURFACES OF PORTIONS OF THE CARDING
ENGINES EMPLOYED IN THE PREPARATION OF COTTON AND OTHER FIBROUS
MATERIALS."
Scaled the 1st July 1870, and dated the 7th February 1870.
PROVISIONAL SPECIFICATION left by the said Joseph Standring
Dronsfield at the Office of the Commissioners of Patents, with his
Petition, on the 7th February 1870.
I, JOSEPH STANDRING DRONSFIELD, of the Firm of Dronsfield Brothers,
5 Machinists, of Oldham, in the County of Lancaster, do hereby declare
the nature of the said Invention for "IMPROVEMENTS IN APPARATUS FOR
GRINDING THE CARD COVERED SURFACES OF PORTIONS OF THE CARDING ENGINES

page_text: EMPLOYED IN THE PREPERATION OF COTTON AND OTHER FIBROUS MATERIALS," to
be as follows:-
My Invention relates to the apparatus employed in the grinding of
the cards with which the cylinders, rollers, flats, and other similar parts
of carding engines are covered, such grinding having for its object to
sharpen the points of the wires of the cards, as is well understood.
In one form of the said apparatus which has been much employed to
grind the said rollers or cylinders in their places a boss or short grinding
roller has been caused to traverse to and fro across the face of the said
cylinder by means of a screw shaft, which shaft has been cut with both
a right-hand and a left-hand thread.
Now my said Invention consists more particularly in adapting the said
screw shaft and the parts in connection therewith to the employment of
a flat grinding disc in lieu of a boss or roller, as aforesaid, whereby I
am enabled to obtain a better effect.
In one arrangement of the improved apparatus, as adapted to the
grinding of the rollers or cylinders in their places, as aforesaid, the said
screw shaft is fitted to revolve in bearings formed in end plates or
frames, which are suitably formed to fit into the ordinary brackets or
bearings or into brackets provided for the purpose, and on the said
shaft is mounted a travelling frame, which carries the said grinding
disc. The said disc is fitted or formed on the end of a shaft or spindle
which revolves in suitable bearings formed in the said travelling frame,
and on the said spindle is fixed a bevil or mitre wheel, which gears with
a second wheel mounted on the said screw shaft, and fitted with a key
which slides in a slot or groove formed in the said shaft, so that when
the said shaft is caused to revolve in the usual manner a revolving
motion will be communicated to the aforesaid grinding disc. The
aforesaid travelling frame is fitted with a key suitably formed to slide
in the screw threads formed in the said screw shaft as is usual, and the
shank of the said key is by preference fitted to swivel in a sliding block,
which is fitted in a slot formed in the said travelling frame, the effect
of this arrangement being that on the said key being shunted from onc
screw thread to the other at each end of the traverse of the said frame and
grinding disc the said frame and disc will remain stationary for a short
timo in order that the ends of the roller or cylinder may be ground

page_text: equally with the central portion. In order to prevent the said travelling
frame from revolving with the said screw shaft a bracket attached to
the said frame slides on a stationary rod or bar, or is fitted with one or
more wheels which bear against the said rod or bar, or other means may
be employed as found to be suitable. The aforesaid screw shaft is or
may be partly enclosed by means of a cover, which is preferably fixed to
the afore-mentioned end plates, and assists in the connecting together
thereof.
The arrangement for causing the revolution of the said grinding disc
may be variously modified, as for example, skew bevil or screw spur,
wheels may be employed, or the motion may be transmitted from the.
spur or bevil wheel on the screw shaft through intermediate wheels, or.
a seperato shaft or a flying band may be employed to cause the revolution.
of the said disc, the said screw shaft in such a case effecting only the
traversing of the said disc.
The afore-described apparatus may be modified to constitute the
principal working parts of a fixed machine to grind card rollers or flats.
It will be understood that the flat surface of the said grinding disc is
or may be covered with emery powder, as in the case of the ordinary
grinding rollers.
SPECIFICATION in pursuance of the conditions of the Letters Patent,.
filed by the said Joseph Standring Dronsfield in the Great Scal
Patent Office on the 3rd August 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, Josep¤.
STANDRING DRONSFIELD, of the Firm of Dronsfield Brothers, Machinists,
of Oldham, in the County of Lancaster, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventh day of February, in the year
of our Lord One thousand eight hundred and seventy, in the thirty-third
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said Joseph Standring Dronsfield, Her special license
that I, the said Joseph Standring Dronsfield, my executors, adminis-
trators, und assigns, or such others as I, the said Joseph Standring
-

page_text: Dronsfield, my 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 "IMPROVEMENTS IN APPARATUS FOR GRINDING THE CARD COVERED
SURFACES OF PORTIONS OF THE CARDING ENGINES EMPLOYED IN THE PREPARATION
OF COTTON AND OTHER FIBROUS MATERIALS," upon the condition (amongst
others) that I, tho said Joseph Standring Dronsfield, my executors or
administrators, by an instrument in writing under my, or their, or one
of 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 I, the said Joseph Standring Dronsfield, do
hereby declare the nature of my said Invention, 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, that is
to say :-
My Invention relates to the apparatus employed in the grinding of
the cards with which the cylinders, rollers, and other similar parts of
carding engines are covered, such grinding having for its object to
sharpen the points of the wires of the cards, as is well understood.
In one form of the said apparatus which has been much employed to
grind the said rollers or cylinders in their places a boss or short grinding
roller has been caused to traverse to and fro across the face of the said
cylinder by means of a screw shaft, which shaft has been cut with
both a right-hand and a left-hand thread.
Now my said Invention consists more particularly in adapting the
said screw shaft and the parts in connection therewith to the employment
of a flat grinding disc in lieu of a boss or roller as aforesaid, whereby I
am enabled to obtain a better effect.
In an arrangement of the improved apparatus adapted to the grinding
of the rollers or cylinders in their places as aforesaid the said screw shaft

page_text: is fitted to revolve in bearings formed in end plates or frames which are
suitably formed to fit into the ordinary brackets or bearings or into
brackets provided for the purpose, and on the said shaft is mounted a
travelling frame which carries the said grinding disc. The said disc is
fixed or formed on the end of a shaft or spindle which revolves in
suitable bearings formed in the said travelling frame, and on the said
spindle is fixed a bevil or mitre wheel which gears with a second wheel
mounted on the said screw shaft and fitted with a key which slides in a
slot or groove formed in the said shaft, so that when the said shaft is
caused to revolve in the usual manner a revolving motion will be com-
municated to the aforesaid grinding disc. The aforesaid travelling frame
is fitted with a key suitably formed to slide in the screw threads formed
in the said screw shaft in order that when the said screw shaft is revolved
the said frame together with the grinding disc or plate will be caused to
traverse to and fro across the surface of the carding cylinders as in the
case of the boss or short grinding roller herein previously referred to.
In order that the said Invention may be better understood, I have
furnished to accompany this Specification a Sheet of Drawings made for
the most part about one quarter of the full size, and having similar
letters of reference marked upon corresponding parts in the various
Figures.
Referring in this place to the said Drawings, Fig. 1 is a side elevation
of the improved apparatus represented as when operating upon the main
cylinder of a carding engine, Fig. 2 being a plan, and Fig. 4 an end
view of the said apparatus; Fig. 3 is a cross section on the line A, B,
and Fig. 5 is a detached sectional view of the travelling frame.
In the said Figures a is the grinding disc or plate, b is the travelling
frame, and c is tho screw shaft. The said screw shaft is fitted to revolve
in bearings formed in the end plates d, d, and upon the said screw shaft
is mounted the said travelling frame, which is suitably fitted to slide upon
the screwed portion of the said screw shaft. The disc a is fixed to one
end of the steel shaft e, which is fitted to revolve in bearings formed in
the said travelling frame, and on the said shaft e is fixed a bevil wheel
or pinion, which is in gear with the bevil wheel 7, which is mounted
on the screw shaft and travels to and fro with the frame 7. The bevil
wheel is fitted with a fast key which slides in the grouve & frined in

page_text: ::
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the shaft c, so that when tho said shaft is caused to revolve the disc a
will also be rotated. In order. to prevent the frame & from revolving.
around the axis of the screw shaft the said frame carries a bracket i, the
end of which is bored out or otherwise fitted to slide upon a rod, which
rod is fixed by each end to the plates d, d. The part of the said bracket
which slides on the said rod is fitted with glands or stuffing boxes, as
shown in plan on an enlarged scale at 1, 1, in Fig. 6, this arrangement
preventing the access of dust or grit to the bearing surface formed in the
said bracket. The travelling frame b is fitted with a key shewn at m,
which slides in the screw threads formed on the shaft c, and is shunted:
from one thread into the other on the said frame, arriving at each end of
its traverse as is usual, but in this case the shank 12 of the said key is
fitted to swivel in the block o, which is free to slide in a slot formed in
the travelling frame, the effect of which arrangement is that on the said
key being shunted from one screw thread to the other at each end of
the traverse of thic travelling 'frame tlie said frame will remain stationary
during the time that the block o is sliding from one end of the; slot in
which it is fitted to the other end thereof, and the grinding disc will thus
be caused to dwell a short time on each end of the card cylinder in order
that the said ends of the card cylinder may be ground to an equal extent.
with the central portion. The end plates d, d, are cach formed with a.
projecting piece p, which fits in a bracket attached to the side of the
carding engine, as shown at Fig. 4, both of the brackets being fitted
with adjusting screws so that the grinding of the cards may be regulated..
The said plates d, d, are connected together by the cylindrical sheet iron 2
casing, which is riveted at each end to the plates, and serves also to
enclose the working parts of the apparatus; the rod also assists in
connecting together the said plates. A sliding or hinged door is fitted
at s in order that access may be had to the screw shaft and the travelling
frame for the purpose of cleaning or oiling the same. It will be under- 3
stood that the surface of the disc a which is towards the cards when at
work is covered with emery or other suitable grinding material. A
raised rim is formed around the edge on the back of the said disc in order
to prevent any oil which may flow thereupon from being thrown off by
reason of thic revolution of the said disc.
.
3

page_text: shewn in the Drawings, and the grinding disc is to be adjusted so that
its line of traverse will be parallel with the face of the cards on the
cylinder, doffer, licker in, or other roller or cylinder which is to bo
ground, and also that the said grinding disc shall be in contact with the
said cards. A rotatory motion is then to be communicated to the shaft c
by means of a strap acting on the pulley t, as will be well understood,
and the disc a will revolve and will at the same time traverse to and fro
across the face of the cards, thus effecting the grinding of the said
cards.
Although the improved apparatus represented in the Drawings has
herein-before been described as a portable apparatus only, it will readily
be understood that the working parts of the said apparatus or modi-
fications thereof may be adapted to be employed in fixed machines for
the grinding of rollers or clearers.
I would here remark that the grinding disc may be caused to revolve
by other means than those herein-before described and shewn in
the Drawings, as, for example, "skew bevil wheels " or " skew
spur wheels" may be employed to transmit motion from the screw
shaft c to the said grinding disc, or the motion may be transmitted
through intermediate spur wheels acting in connection with bevil
wheels, or a seperate shaft or a flying band may be employed to cause
the revolution of the said disc, the said screw shaft in such a case
effecting only the traversing of the said disc. Also I would mention
that supposing any card covered cylinder to have been ground at one
time with an open strap acting on the pulley t, it is advisable at the next
succeeding grinding thereof to employ a crossed strap, that is to say, that
the grinding disc should revolve in contrary directions at different
operations, or, if preferred, the direction of revolution of the said disc
may be reversed during any one operation.
Having now described the nature of my said Invention, and my method
of carrying the same into practical effect, I would in conclusion have it
to be understood that I do not confine myself to the precise details as
herein mentioned and as shown in the accompanying Drawings; but
that I desire to claim,―
First. The employment in card grinding apparatus of a revolving disc
fraversing to and fro by means of a screw or screw shaft of the description
herein-before mentioned and shewn in the accompanying Drawings.

page_text: And, secondly. The apparatus for the purpose as herein afore-
said, substantially as herein-before described and as illustrated in the
accompanying Drawings.
In witness whereof, I, the said Joseph Standring Dronsfield, have
hereunto set my hand and seal, this Second day of August One
thousand eight hundred and seventy.
JOSEPH STANDRING DRONSFIELD. (L.S.)
Signed and scaled by the said Joseph
Standring Dronsfield, in the pre-
sence of
EDWARD K. DUTTON,
Agent to the Patentee,
3, Smithy Door,
Manchester.