Year: 1886

page_text: I JOHN CLAYTON MEWBURN, of 169 Fleet Street, in the City of London,
Fellow of the Institute of Patent Agents do hereby declare the nature of this
invention to be as follows
This invention has reference to the grinding or pointing of metallic cards and
teazles and one of its characteristic features is the performing of the grinding or
pointing operation in the wet way, that is to say-by means of a grinding
material used concurrently with a lubricating material, as for example-emery and
oil, or sand and water.
When emery is employed it is used very fine and mixed with oil or other
lubricating material and the result is a grinding or pointing having a softness and
fineness which quite distinguishes it from that produced by dry processes.
The action of the emery or other grinding material is not limited simply to the
circumference of the card cylinder to be ground, that is to say-the material does
not act only tangentially to the external surface; the emery is caused to penetrate
to a certain depth (say, from 1 to 2 millimetres) into the card so as to act on the
side of each tooth or dent and thus really reduce it to a pin point.
In order to effect this object the emery mixed with oil is deposited upon the
cards of the rollers or cylinders to be acted upon; two (say) of these are mounted
so as to receive a rotary speed of about 600 revolutions per minute while in.
contact with a rotary metallic brush, the wires of which enter about 2 millimetres
into the card teeth of the rollers. These also rub upon the surface of a truly
turned cast iron cylinder which rotates in the same direction as the brush and
thus serves to polish the cards.
"
The same result can be obtained by projecting the grinding and lubricating
material (emery and oil, or sand and water) with great force by means of steam or
compressed air, with the aid of a Giffard or other injector. Sand mixed with water

page_text: .
answers well in this case.
It is placed in a reservoir. The steam (or compressed
air) is supplied by a pipe fitted with a cock; it draws up the sand from the
reservoir and projects it through properly placed orifices against the card rollers
which are caused to rotate at about 600 turns per minute. The sand falls back
into the reservoir to be again drawn up by the injector. The injecting and 5
projecting apparatus has a to and fro motion given to it by means of a double
threaded shaft so that it travels along the whole length of the card rollers.
In applying the invention to small card or teazling rollers, such as those used in
gig mills, the metallic brush hereinbefore described may be dispensed with and the
two rollers to be acted upon will then simply be placed in contact the card teeth of
the one working into the card teeth of the other.

page_text: Improvements in and Apparatus for Grinding or Pointing
Metallic Cards and Teazles.
I JOHN CLAYTON MEWBURN, of 169 Fleet Street, in the City of London,
Fellow of the Institute of Patent Agents do hereby declare the nature of this
invention (a communication from abroad by La Société Grosselin père et fils of
1 Boulevard St. Denis, Paris, France, Machine Builders) and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
This invention has reference to the grinding or pointing of metallic cards and
teazles and one of its characteristic features is the performing of the grinding or
pointing operation in the wet way, that is to say: by means of a grinding material
used concurrently with a lubricating material, as for example, emery and oil, or
sand and water.
When emery is employed it is used very fine and mixed with oil or other
lubricating material and the result is a grinding or pointing having a softness and
fineness which quite distinguishes it from that produced by dry processes.
The action of the emery or other grinding material is not limited simply to the
circumference of the card cylinder to be ground, that is to say:-the material does
not act only tangentially to the external surface; the emery is caused to penetrate
to a certain depth (say from 1 to 2 millimetres) into the card so as to act on the
side of each tooth or dent and thus really reduce it to a pin point.
In order to effect this object the emery mixed with oil is deposited upon the
cards of the rollers or cylinders to be acted upon; two (say) of these are mounted
so as to receive a rotary speed of about 600 revolutions per minute while in contact
with a rotary metallic brush the wires of which enter about 2 millimetres into the
card teeth of the rollers. These also rub upon the surface of a truly turned cast
iron cylinder which rotates in the same direction as the brush and thus serves to
polish the cards.
Figure 1 of the annexed drawings illustrates an arrangement for grinding or
pointing cards or teazles in the manner just explained. A, A¹ are two card rollers
or cylinders, B is the metallic brush, and C the cast iron polishing cylinder.
The same result can be obtained by projecting the grinding and lubricating
material (emery and oil or sand and water) with great force by means of steam
or compressed air with the aid of a Giffard or other injector. Sand mixed
with water answers well in this case. Figure 2 illustrates an arrangement for
carrying this modification into effect. The sand is placed in a reservoir D. The
steam (or compressed air) is supplied by a pipe E fitted with a cock r; it draws up
the sand from the reservoir through the pipe F and projects it through properly
placed orifices C, C against the card rollers A, A¹ which are caused to rotate at
about 600 turns per minute. The sand falls back into the reservoir D to be again
drawn up by the injector. The injecting and projecting apparatus has a to and fro
motion given to it by means of a double threaded shaft V (see Figure 3) so that it
travels along the whole length of the card rollers,
1

page_text: In applying the invention to small card or teazling rollers, such as those used in
gig mills, the metallic brush, B (Figure 1), may be dispensed with and the two
rollers to be acted upon will then simply be placed in contact, the card teeth of
the one working into the card teeth of the other. This modification is represented
in Figure 4, in which a, a' are the two rollers.
°
Having now particularly. described and ascertained the nature of my said
invention, and in what manner the same is to be performed, as communicated to
me, I declare that what I claim, in respect of grinding or pointing metallic cards
and teazles, and of apparatus therefor is :-
-the
1. The mode of grinding or pointing hereinbefore described, that is to say :—
wet way by means of a grinding material used concurrently with a lubricating
material, substantially as set forth.
2. The apparatus constructed substantially as hereinbefore described and illus-
trated in Figure 1.
3. The apparatus constructed substantially as hereinbefore described and illus-
trated in Figures 2 and 3.
4. The apparatus constructed substantially as hereinbefore described and illus-
trated in Figure 4.