Year: 1897

page_text: Date of Application, 5th May, 1897
Complete Specification Left, 5th Mar., 1898-Accepted, 9th Apr.,
1898
We, JOHN PALFREYMAN, Fitter, and PERCY BRIGGS, Correspondent, both of
14, Upper Gorden Street, Pendleton, in the County of Lancaster, do hereby declare
the nature of this invention to be as follows:
This invention relates to that class of apparatus for grinding wire cards known
as the Horsfall Grinder; the object being to enable the said cards to be more
truly ground than has been hitherto possible.
For this purpose we dispense with the usual revolving tube and the reversed
screw thread on the shaft upon which the grinding cylinder revolves and traverses,
and we provide a suitable slide or bed which can be readily fitted and fixed on
any carding engine, and carries in suitable brackets a shaft upon which a screw
thread is cut in one direction only. The bracket or support of the grinding cylinder
slides upon the bed aforesaid, and is made or provided with a nut fitting the thread
on the screwed shaft to which motion may be given in either direction as required
by suitable reversing gear actuated by a sliding rod or bar carried also on the
bed; and we provide this rod or bar with projections against which the bracket
or bearing of the grinding cylinder comes into contact at each end of its traverse,
and thus automatically reverses the motion of the screwed shaft and (consequently)
the traverse of the grinding cylinder.
The latter is driven by a pinion or wheel moving with the cylinder and bracket
upon a shaft carried by suitable brackets on the fixed bed and made with a long
groove or a feather or otherwise so formed as to drive the said pinion or wheel
as it slides along.
This shaft also drives the piuion of the reversing gear above described.
This apparatus will work very smoothly and the bed can be set quite true with the
surface to be ground so that the grinding can be quite accurate, as there will
not be the same tendency to vibration which occurs when the revolving tube and
reversed screw are employed.
The projections on the reversing rod or bar may be adjustable to suit varying
widths of the card surfaces to be ground.
We also propose to mount the shaft of the grinding cylinder in ball bearings
fitted to the traversing bracket.
1001
We, JOHN PALFREYMAN, Fitter, and PERCY BRIGGS, Correspondent, both of
14, Upper Gorden Street, Pendleton, in the County of Lancaster, do hereby declare
[Price 8d.]

page_text: I
the nature of this invention and in what maner the same is to be performed to
be particularly described and ascertained in and by the following statement:
-
This invention relates to that class of apparatus for grinding wire cards known
as the Horsfall Grinder; the object being to enable the said cards to be more
truly ground than has been hitherto possible.
The invention will be readily understood on reference to the accompanying
drawings.
Fig. 1 is an end view, Figs. 2 and 3 elevation and plan Fig. 4 a longitudinal
section, and Fig. 5 a transverse section of apparatus for grinding wire cards made
according to our invention.
Fig. 6 shews a detached part hereafter referred to, and Figs. 7 and 8 a modifi-
cation of the means for reversing the screwed shaft hereafter described.
We dispense with the usual revolving tube and the reversed screw thread on
the shaft upon which the grinding cylinder revolves and traverses, and we pro-
vide a suitable slide or bed a shewn in longitudinal section at Fig. 4, which can
be readily fitted and fixed on any carding engine, say by the brackets a* and
lugs a at each end as shewn, this bed carries in suitable brackets ba shaft c
upon which a screw thread is cut in one direction only. The bracket or support.d
of the grinding cylinder e slides upon the bed a aforesaid, and is made or pro-
vided with a nut d* fitting the thread of the screwed shaft c to which motion may
be given in either direction as required by suitable reversing gear actuated by a
sliding rod or bar f carried also on the bed a; and we provide this rod or bar f
with projections f¹ and f³ (as shewn) against which suitable parts of or on the
bracket or bearing d of the grinding cylinder e come into contact at each end of
its traverse, and thus automatically reverse the motion of the screwed shaft and
(consequently) the traverse of the grinding cylinder e.
In the arrangement shewn on Figs. 1, 2, 3 and 6 of the drawings one of the
springs d on the sliding bracket & comes against one of the pegs f¹ and is forced
1 back thereby until one of the projections on the bracket d raises or forces out
the catch on the slide a and releases the projection f; the spring will then
act on the bar or rod ƒ (through f¹) and move it in the direction of the motion of
the bracket d. The sliding of the rod or bar f may be made to reverse the motion
of the screw c in various ways; for example, the rod or bar f may carry at one end
a forked arm f³ sliding a bevel pinion g into gear with one or other of two reversed
bevel pinions g keyed on the screwed shaft.
The boss of the pinion g is provided with a worm wheel in gear with a worm ¹
on the shaft h which drives the cylinder e as hereafter described.
. Or the screwed shaft c may be provided with a spur wheel in gear with a
carrier wheel carried by an arm i pivotted on the shaft c. This wheel can
be caused to gear with a wheel on the shaft h either through a carrier g or
directly, according as the arm i is raised or lowered. The motion of this arm is
or may be effected by an inclined slot ¹ or its equivalent therein engaging with
a pin or bowl f on the end of the bar or rod f (see Figs. 7 and 8).
The grinding cylinder e is driven by gearing e and a pinion or wheel h* moving
with the cylinder e and bracket & upon a shaft carried by suitable brackets a³
on the fixed bed a and made with a long groove or a feather or otherwise so formed
as to drive the said pinion or wheel as it slides along.
This shaft also drives the reversing gear as above described.
This apparatus will work very smoothly and the bed a can be set quite true with
the surface to be ground so that the grinding can be quite accurate, as there will
not be the same tendency to vibration which occurs when the revolving tube and
reversed screw are employed.
The projections on the reversing rod or bar may be adjustable to suit varying
widths of the card surfaces to be ground..
We also propose to mount the shaft of the grinding cylinder in ball bearings
fitted to the traversing bracket d.
..
It will be evident without further illustration that the shaft h can be passed

page_text: through the centre of the grinding cylinder e and drive the same by means of a
sliding key and groove directly.
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:-
The improved apparatus for grinding the teeth of wire cards consisting of the
fixed bed readily applicable to the carding engine, sliding bracket carrying the
grinding cylinder and traversed by a screwed shaft, and suitable reversing gear,
substantially as hereinbefore described.
Dated this 4th day of March 1898.
GEO. DAVIES & SON,
Agents for the Applicants, 4, St. Ann's Square, Manchester.