Improvements in and connected with Grindstones.
Year: 1898

page_text: Date of Application, 9th Feb., 1898
Improvements in and connected with Grindstones.
I, JOSEPH BARROW, of the firm of Thomas Shanks and Company, of the Union
Iron Works, Johnstone, in the County of Renfrew, North Britain, Engineer, do
hereby declare the nature of this invention to be as follows, that is to say: -
My said invention relates to grindstones such as are used for sharpening tools
and for analogous purposes; and comprises improved carrying and mounting
arrangements, improved arrangements for applying water and for collecting it
and the abraded inaterials, and improved appliances for holding, adjusting, and
moving tools.
In apparatus made with my improvements the grindstone is fixed on a horizontal
shaft between disks which in diameter are as large as to leave uncovered only
as much of a new or full-sized grindstone as is intended to be gradually worn
away in use. The shaft is carried in bearings on external flanges formed on
the tops of the sides of a castiron box or trough, which forms the bed frame of the
machine, and which is made with a transverse hollow partition under the lowest part
of the grindstone, this partition forming pockets or wells between it and the ends
of the trough. Water is applied under a suitable pressure by means of a perforated
pipe placed under the bottom or lower part of the grindstone, and is projected
upwards against the surface of the grindstone; and the grindstone rotates in the
direction to move upwards from the position of application of the water to
the position in which the tools are to be applied to it. On the rising side of the
grindstone a piece of wood or other suitable material is applied in contact or nearly
so with the circumference to prevent an excess of water being carried or thrown up,
this piece being fixed to the upper end of a plate which can be adjusted further inwards
as the grindstone becomes reduced in diameter, and which deflects downwards the
water thrown against it. A cover or guard is fixed over the top of the grindstone
to receive water and abraded materials thrown from the grindstone on its upper
rising part; and on the descending side there is an adjustable plate having
fixed at its lower edge a piece of wood or other suitable material to touch or nearly
touch the circumference of the grindstone and to prevent water and abraded
materials from being thrown off. The top of the cover is, preferably, made flat,
to serve as a support for a water-supply vessel to be used if at any time water of
suitable pressure is not available for the bottom supply herein before referred to.
When the apparatus is in action the water with the abraded materials finds its way
into the two pockets of the trough, and in these the abraded materials become more
or less completely deposited, whilst the water after filling up to the top of the
transverse hollow partition overflows through an outlet in the top of that
partition.
For holding, adjusting, and moving the tools, the following parts are pro-
vided:-At the end of the trough which is at the rising side of the grindstone
there is fixed a guide bedplate on which is fitted a bottom saddle movable inwards
and outwards by means of two screw spindles, worked by means of spurwheels on

page_text: their outer ends with which there gears a pinion which can be turned with a hand-
wheel or key handle. In bearings on the bottom saddle there is mounted a guide
plate which can be set at a required angle by means of a toothed sector and a worm
or pinion on a shaft which can be turned by a key handle or handwheel. On the
guide plate there is fitted a slide which can be moved across the circumferential
face of the grindstone by a screw spindle having a handwheel on it. The tool
holder is a vertical cylindrical boss having a slot formed through it to receive the
tool, and a screw tapped down through its upper end to secure the tool and other
parts. An undercut recess in the side receives the tool holder which has a flange
at its bottom, and a covering plate with bent over edges is placed over the slide
the tool holder projecting up through a circular hole in the plate. The tool
holder can be turned to place the tool in any angular position horizontally, and
when adjusted the screwing down of the holding screw not only fixes the tool but
clamps the covering plate on which the tool rests, and also clamps the tool holder
in the slide. The covering plate moves with the slide and protects the guide
plate and other parts from abraded particles or dust.
The circumferential surface of the grindstone is rendered true when required by
means of a diamond fixed in the end of a bar or shank which is secured like an
ordinary tool in the tool holder.
Improvements in and connected with Grindstones.
I, JOSEPH BARROW, of the firm of Thomas Shanks and Company, of the Union
Iron Works, Johnstone, in the County of Renfrew, North Britain, Engineer, 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, that is to say: -
My said invention relates to grindstones such as are used for sharpening tools
and for analogous purposes; and comprises improved carrying and mounting
arrangements, improved arrangements for applying water and for collecting it
and the abraded materials, and improved appliances for holding, adjusting, and
moving tools.
And in order that my said invention and the manner of performing the same
may be properly understood I hereunto append two sheets of explanatory drawings
to be hereinafter referred to in describing my improvements.
Figures 1, 2, and 3, of the drawings are respectively a back elevation, a front
elevation and a side elevation, partly in section, of grindstone apparatus as made
with my improvements. Figure, 4, is a plan of a detail. In these drawings the
same reference letters and numerals are used to mark the same or like parts
wherever they are repeated.
In apparatus made with my improvements, the grindstone, A, driven by pulley
gearing, U, or in any other suitable way is fixed on a horizontal shaft B, between
disks, A 1, A 2, which in diameter are as large as to leave uncovered only as much
of a new or full-sized grindstone as is intended to be gradually worn away in use.
The shaft, B, is carried in bearing blocks, B1, B2, formed or fixed on external
flanges, B3, formed on the tops of the sides of a castiron box or trough, C, which
forms the bed frame of the machine, and which is made with a transverse hollow
partition, C1, under the lowest part of the grindstone, this partition forming

page_text: pockets or wells, C2, C3, between it and the ends of the trough. Water is applied
under a suitable pressure by means of a perforated pipe, D, provided with stop
cocks, D1, D2, fixed across the trough, C, under the bottom or lower part of the
grindstone, A. The water is projected upwards against the surface of the grind-
stone, A, and the grindstone rotates in the direction shown by the
arrow; 50 as to move upwards from the position of application of the
water to the position in which the tool to be sharpened is to be applied
to it. On the rising side of the grindstone, A, a piece, E, of wood or other suitable
material is applied in contact, or nearly so, with the circumference to prevent an
excess of water being carried or thrown up, this piece being fixed to the upper end
of a plate, E 1, fixed to a rocking shaft, E2, fitted in bearings in the sides of the
trough, C. A small crank handle, E 3, is fixed on the end of the rocking shaft, E 2,
for adjusting it and a handled pinching screw, E4, is provided for retaining the
handle in any desired position. By this means the plate, E1, can be adjusted
further inwards as the grindstone, A, becomes reduced in diameter, the piece of
wood, E, deflecting downwards some of the water thrown against the grindstone.
A cover or guard, F, supported on brackets, F1, F2, fixed to the bearing
blocks, B1, B2, is placed over the top of the grindstone, A, to receive water and
abraded materials thrown from the grindstone on its upper rising part; and on the
descending side there is an adjustable plate or shutter, G, kept in position by
pinching screws, G1, G2, and having fixed at its lower edge a piece, G 3, of wood
or other suitable material to touch or nearly touch the circumference of the grind-
stone, A, and to prevent water and abraded materials from being thrown off.
The top of the cover, F, is, preferably, made flat, to serve as a support for a water-
supply vessel (not shown) to be used if at any time water of suitable pressure is not
available or is insufficient for the bottom supply hereinbefore referred to. When
the apparatus is in action the water with the abraded materials finds its way into
the two pockets, C2, C3, of the trough, C, and in these the abraded materials
become more or less completely deposited and can be discharged through the sludge
holes, C4, C5, whilst the water after filling up to the top of the transverse hollow
partition, C1, overflows through an outlet, C6, in the top of that partition.
For holding, adjusting and moving the tool to be operated upon, the following
parts are provided:-At the end of the trough, C, which is at the rising side of the
grindstone, A, there is formed or fixed a guide bedplate, H, on which is fitted a
bottom saddle, J, movable inwards and outwards by means of two screw
spindles J 1, J2, worked by means of spurwheels, J3, J4, on their outer ends,
with which there gears a pinion, J 5, which can be turned with a handwheel, J 6,
or a key handle. In bearings, J7, J 8, J9, formed on the bottom saddle, J, there
is mounted on a shaft, K, a guideplate, K1, which can be set at a required
angle by means of a toothed sector, L, on the shaft, acted on by a worm, L1, (or
it might be a pinion) on a shaft, L2, which can be turned by a handwheel, L3,
or a key handle. On the guide plate, K 1, there is fitted a slide, M, which can be
moved across the circumferential face of the grindstone, A, by a screw spindle, M 1,
turned by a handwheel, M 2. The tool holder, N, is a vertical cylindrical boss,
having a slot, N 1, formed through it to receive the tool, N 2, (shown in dotted lines
in Figures, 3, and 4, and a screw, N 3, tapped down through its upper end to secure
the tool and other parts. An undercut recess, N 4, in the slide, M, receives the tool
holder, N, which has a flange, N 5, at its bottom, and a covering plate, P, with
bent over edges is placed over the slide, the tool holder projecting up through a
circular hole, P 1, in the plate. The tool holder, N, can be turned, as shown in
Figure, 4, to place the tool, N2, in any angular position horizontally and when
adjusted, the screwing down of the holding screw, N 3, not only fixes the tool, but
clamps the covering plate, P, on which the tool rests, and also clamps the tool
holder in the slide, M. The covering plate, P, moves with the slide, M, and
protects the guide plate, K1, and other parts from abraded particles or dust.
An adjustable rest, Q, is provided at the back of the grindstone, A, for use when
grinding tools by hand.

page_text: The covering plate, P, has also on it a movable index, R, which can be set to
the angle at which the tool to be sharpened is to be placed. There is also fixed
on the plate, P, a stud, S, and a crosspiece, T, with turned-up ends which may in
some cases be used for grinding tools.
The circumferential surface of the grindstone, A, is rendered true, when required,
by means of a diamond fixed in the end of a bar or shank, which is secured like an
ordinary tool in the tool holder, N.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
1. The combination and arrangement of parts constituting my improvements in
and connected with grindstones all as herein before described and shown in the
accompanying drawings.
2. Improved grinding apparatus, comprising a grindstone fixed on a horizontal
shaft between disks, and running in a trough, formed with a hollow partition and
with pockets or wells, having outlets for water and sludge, a perforated pipe, with
regulating cocks, for applying water under pressure to the underside of the grindstone,
adjustable water deflectors, and a flat-topped guard or cover for the top part of the
grindstone, the parts being constructed arranged and operating substantially as
hereinbefore described with reference to the accompanying drawings.
3. In and connected with grindstones, improved tool holding, and adjusting
mechanism, comprising a guide bed plate formed on the trough, fitted with a
.bottom saddle adjustable by means of screw spindles an angularly adjustable guide
plate on the bottom saddle, a slide fitted to move across the guide plate by means
of a handled screw spindle, and having on it a slotted vertical cylindrical flanged
boss or tool holder, with clamping screw, and a covering plate fixed on and moving
with the slide, the parts being constructed arranged and operating substantially as
herein before described with reference to the accompanying drawings.
Dated this Seventh day of November 1898.
EDMUND HUNT,
Applicant's Agent.