Improvements in Apparatus for Grinding Card Teeth for Carding Fibres.
Year: 1889

page_text: Date of Application, 26th Aug., 1889
Complete Specification Left, 27th May, 1890-Accepted, 12th July, 1890
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Grinding Card Teeth for Carding
Fibres.
We, WILLIAM MIDDLETON, Manager, and WILLIAM WILSON, Card Manufacturer,
both of the Card Factory, Liversedge, in the County of York, do hereby declare the
nature of this invention to be as follows:-
This invention relates to certain improvements in apparatus for grinding the teeth
or dents of card clothing, and has for its object, the combination of certain mechanical
appliances and motions in such a manner, that both the ends and sides of the teeth
may be ground simultaneously, and thereby grind them to what is known as "needle
pointed cards," in a more expeditious manner than hitherto.
We accomplish our object in the following manner :-
-We mount a cylinder of
large diameter in a suitable frame, and around the cylinder the card clothing is
secured tight, but in a temporary manner. To the said frane are fixed adjustable
journals in which rotate the shafts of the grinding roller and grinding discs, the
peripheries of the latter being A shaped and in addition to the discs rotating, a
reciprocating intermittent motion is imparted to them by means of a cam plate
having a circumferential rim of irregular width, against the face of which is an arm
attached to the disc shaft in such a manner that the latter is free to rotate.
On each revolution of the cylinder, or at regulated intervals, the cam plate is
operated a certain distance, thereby causing the disc shaft and discs to be moved for
a time in one direction, and then in the other, thus operating on all the teeth of the
card clothing, and grinding them to what are termed "needle points," the rotating
grinding roller acting on the ends of the teeth, grinds them all to an equal length
Dated this 23rd day of August 1889
COMPLETE SPECIFICATION.
Improvements in Apparatus for Grinding Card Teeth for Carding
Fibres.
We, WILLIAM MIDDLETON, Manager, and WILLIAM WILSON, Card Manufacturer
both of the Card Factory, Liversedge, in the County of York, 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 :-
This invention relates to certain improvements in apparatus for grinding the teeth
or dents of card clothing, and has for its object, the combination of certain mechanical
appliances and motions in such a manner that both the ends and sides of the teeth
may be ground simultaneously, and thereby grind them to what is known as " needle
pointed cards" in a more expeditious manner and consists of a cylinder of large
diameter in a suitable frame, and wrapping the card fillet around the same, and to the
frame of the apparatus fixing adjustable journals in which rotate the shafts of the
grinding roller and grinding discs, the peripheries of the latter being A shaped and in
addition to rotating, the shaft and discs have also a reciprocating intermittent motion.
In the accompanying drawings, Fig. 1 represents a side view of an apparatus
suitable for pointing the teeth or dents of card clothing.
:
Fig. 2. is an end view of the same, and Figs. 3 and 4, detached details drawn to a
larger scale.
On the machine frames A. is mounted a cylinder B. similar to those used on
23
"

page_text: carding engines, and around the circumference of the cylinder is wrapped tight the
card fillet C. the ends being secured to the cylinder in any convenient manner.
Fig. 5. is an enlarged partial plan view showing the principal parts, and
Fig. 6. is a detail illustrating a modified arrangement for operating the wheel R¹.
The cylinder B. may be driven from the main shaft D. of the machine by a belt
passing over pullies E. and F. and gearing G. G1 and G2 connecting pulley F. with
the shaft of the cylinder, thereby moving it slowly.
To the upper part of each side frame A. are secured brackets H and J. each
supporting on a centre stud a circular toothed wheel or disc K. on which are formed
the projecting bearings I. for supporting the shafts of the grinding roller M. and
grinding discs N. the peripheries of the latter being A shaped, both shafts being
driven by belts from pullies on shaft D.
The shafts of roller M and discs and N. may be placed in either pair of the projecting
bearings L. as may be desired by the operator and are preferably driven from the
main shaft by belting E E as shown in Fig. 2. although they may be if desired,
driven from a main or separate countershaft in the works; and on the cylinder B.
being put in motion, the journals supporting the roller M. are adjusted by pinions P.
so that the circumference of the said roller is in a suitable position for grinding the
points of the card teeth, to sharpen and make them all of equal length.
The grinding discs N. are brought into contact with the card teeth in a similar
manner by pinions P¹ but the extreme circumference of the discs are below the points
of the teeth, so that the taper sides of the discs N. come in contact and grind the
sides of the teeth.
The mechanism for operating the pinions P and P¹ consists of forming a square
at X, Fig. 6. on the end of each shaft Z. so that on placing a box key or handle on
one end of either shaft, the latter and the pinion P. or P₁ may be operated, thus
moving the respective toothed wheel or disc K. and the projecting bearings L.
towards or away from the card teeth on the circumference of the cylinder B. thereby
grinding them to a point; and in order that all the teeth may be ground equally at
the sides and brought to a point, a number of discs equal to about the width of the
cylinder B. are placed on shaft R. and secured thereon by nut S. the shaft and discs
being operated for some distance, first in one direction and then in the other in the
following manner:-
On the shaft or axle of cylinder B. is secured a tappet T. which on each revolution
raises one end of the lever L¹ supported at the opposite end by a stud pin. To this
lever is jointed a catch arm or pawl P2 the end of which is kept in contact with the
ratchet wheel R' by means of spring S¹.
The ratchet wheel R¹ is supported by a short shaft passing through a bracket U.
secured to one of the end frames A. and on the same shaft is secured a cain plate C¹
having a circumferential rim of irregular width. On the rotating shaft R. carrying
the grinding discs N. are secured two collars C² between which is a collar or boss C
free for the shaft R. to revolve therein, and to which is attached an arm Y. kept in
contact with the face of cam-plate C¹ by means of spring S2 so that on each revolution
of cylinder B. the cam plate C is operated a certain distance, thereby causing the
revolving shaft R. and discs N. to be moved for a time first in one direction and then
in the other: the teeth or dents springing sufficiently to allow the grinding disc N.
when operated to pass from one furrow or space to tbe next: thus operating with
uniformity on all the teeth or dents of the card, and grinding them to what are
termed "needle points," the rotating grinding roller M. acting on the end of the
teeth, grinds them all to an equal length.
The apparatus is also applicable for grinding and pointing the teeth or dents of
what is known as "sheet card clothing," by adding to the apparatus already described
a carriage 1. on either side of the machine and mounting thereon a stretching
roller 2.
The sheet card clothing 3. is passed over the cylinder B. and stretching roller 2.
and the ends stitched together, thereby forming an endless sheet which is tightened
by the before inentioned carriages being moved in the direction of the arrow by

page_text: means of screws 4. or other well known device; by which sufficient friction is
obtained between the cylinder B. and clothing, for the latter to rotate along with the
cylinder.
The catch arm or pawl P2 and tappet T. may be dispensed with when grinding
card clothing, and the ratchet wheel R operated by attaching to the edge of the card
clothing 3. a finger F¹ having three or more prongs formed somewhat as shown by
Fig. 6. which embrace the card clothing, the finger F1 being so bent that it will come
in contact with the teeth of the ratchet wheel R¹ once every revolution of the card
clothing, and thus operate the cam plate C¹ so that the discs N. are moved a certain
distance once every revolution of the card clothing, for a time in one direction and
then in the other, the roller M. and discs N. acting on the card teeth in the manner
as before described.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. In a machine for grinding card teeth, the combination with a grinding roller
and grinding discs of mechanisin for operating said grinding discs whereby the discs
are reciprocated to operate intermittently upon both sides of the card teeth,
substantially as described.
2. The combination of a tappet T. or ratchet wheel R. cam plate C' arm Y.
grinding discs N. substantially in the manner and for the purpose as herein before
described.
3. The combination of a cylinder B. and card fillet or clothing, a grinding roller M.
and grinding discs N. with a tappet T. pawl P2 ratchet wheel R₁ cam plate C' and
roller shaft R. substantially in the manner and for the purpose hereinbefore set
forth.