Improvements in the Method of and Means for Moulding and Grooving Emery Card Grinding Surfaces.
Year: 1888

page_text: Late of Application, 23rd Nov., 1888
Complete Specification Left, 22nd Aug., 1889-Accepted, 28th Sept., 1889
PROVISIONAL SPECIFICATION.
Improvements in the Method of and Means for Moulding and Grooving
Emery Card Grinding Surfaces.
1 JOSEPH STANDRING DRONSFIELD of the firm of Dronsfield Brothers of the Atlas
Works, Oldham, in the County of Lancaster, Card Grinding Machine Makers, do
hereby declare the nature of this Invention to be as follows:-
My Invention relates to the card grinding rollers or appliances or roller covering
materials which are coated or covered with a grinding composition which is moulded
or finished so as to have a grooved or fluted surface. In a former Invention for
which Letters Patent Number 5442 of the year 1880 were granted to me a roller
coated with grinding composition was revolved in contact with a grooved master
roller whilst the composition was in a condition to receive a grooved impression from
the said master roller. The object of my present invention is to obtain that the
groove shall run around the grinding roller obliquely in order that the roller when in
use shall have more side grinding effect. This result I obtain by imparting a to and
fro endwise traverse to the roller which is being coated such end wise motion in the
direction of the axis of rotation being regular and uniform each complete to and fro
movement being effected during one complete revolution of the roller. A simple
way of obtaining this movement is by fixing a cam upon the roller shaft which
latter is mounted to slide in its bearings. A fixed bowl may run in a groove in the
cam or the edge of the cam may run between two bowls or fingers or the face of
the cam may be kept in contact with a bowl or fixed part by means of a spring or load.
In place of this arrangement a cam or excentric might be mounted upon a separate
shaft revolving in unison with the roller shaft and be arranged to act upon the latter
but I prefer the first described method as being more simple. In the coating of
filleting I wind the filleting around a roller and move the roller end wise during the
coating as aforesaid.
Di na 11
1000
DUTTON & FULTON,
1, St. James Square, Manchester, Agents.
COMPLETE SPECIFICATION.
Improvements in the Method of and Means for Moulding and Grooving
Emery Card Grinding Surfaces.
I JOSEPH STANDRING DRONSFIELD of the firm of Dronsfield Brothers of the Atlas
Works, Oldham, in the County of Lancaster, Card Grinding Machine Makers, do
hereby declare the nature of this 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 :-
:―
My Invention relates to the card grinding rollers or appliances or roller covering
materials which are coated or covered with a grinding composition which is moulded
or finished so as to have a grooved or fluted surface. In a former Invention for which
Letters Patent Number 5442 of the year 1880 were granted to me a roller coated
with grinding composition was revolved in contact with a grooved master roller whilst
the composition was in a condition to receive a grooved impression from the said master
roller. The object of my present invention is to obtain that the grooves shall run
around the grinding roller obliquely in order that the roller when in use shall have
more side grinding effect. This result I obtain by imparting a to and fro end wise
traverse to the roller which is being coated such end wise motion in the direction of
the axis of rotation being regular and uniform each complete to and fro movement
being effected during one complete revolution of the roller.

page_text: In order that the manner in which 1 carry my invention into practical effect
may be fully understood I have attached hereto a sheet of drawings to which I will
refer in this place. In the said drawings Fig. 1 illustrates the means whereby I
impart the said endwise movement to the roller during the grooving operation.
In the said Fig. a represents one end of a card grinding roller. 6 is one end of the
'roller shaft and c is one of the bearings in which the said shaft revolves. Upon the
said shaft is fixed a cam d which is as it were inclined with relation to the axis of
revolution so that as it revolves every portion of each of its two edges at d¹ moves to
and fro. In practice I finish the said cam in the lathe by imparting a to and fro
movement to the tool in each revolution the tool moving in one direction during half
of the revolution of the cam and returning during the other half revolution. The
said cam revolves between two anti-friction bowls e. e which are mounted to revolve
upon studs which are carried by a bracket f. This bracket is secured to the same part
as the bearing c so that when the said bearing is adjusted in position upon its bed the
bracket moves with the bearing and the working relation of the parts is maintained.
It will be seen that the two bowls e serve as fulcra and that as the cam revolves it
will bear upon the two bowls alternately and that as the studs upon which the said
bowls are mounted are fixtures the cam will be caused to impart sliding movements
to the shaft 6 in the direction of its axis and as a consequence to the roller a. I
have found that the moulding of the vee grooves upon the roller a is facilitated when
the master roller is cut with spiral grooves extending from end to end of the roller
and cutting across the circumferential vee grooves thereon. Fig. 2 illustrates a
modification in the formation of the cam. In this example the cam is formed with
a groove d² and acts upon a single bowl e¹ the said groove being adapted in form to
impart the desired to and fro endwise movement to the shaft and roller. In placed
of the indicated arrangements a cam or excentric might be mounted upon a separate
shaft revolving in unison with the roller shaft and be arranged to act upon the latter
but I prefer a cam used in the indicated manner as being more simple. In the
coating of filleting I wind the filleting around a roller and move the roller end wise
during the coating as aforesaid. It is desirable that such roller shall be of the same
diameter as the roller upon which the filleting is to be ultimately fixed but this is not
absolutely necessary. In practice I arrange for the roller a to move about one half
inch endwise and to make the complete double or to and fro movement whilst making
one complete revolution. I do not however propose to confine myself in respect of
the length of traverse of the roller.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
(1) The method of and means for imparting to and fro movement in the direction
of its axis to the coated or covered roller in addition to the ordinary revolving motion
substantially as and for the purpose set forth and indicated.
(2) In the grooving of the coatings upon card grinding appliances mounting the
coated or covered roller so that it can be moved endwise in the direction of its axis
and employing means for moving the roller to and fro in the said direction
once in each complete revolution of the roller substantially as and for the purpose
set forth.
(3) The cam d or d¹ applied upon the shaft 6 and the bowls e or e¹ for the purpose
set forth.
1000
DUTTON & FULTON,
1, St. James Square, Manchester, Agents.