Year: 1894

page_text: Date of Application, 14th. June, 1894
Complete Specification Left; 9th Mar., 1895-Accepted, 13th Apr., 1895
I JOHN ORMEROD COTTRILL of The Bee Hive Works, Bolton, in the County
of Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
My said invention relates to the rests which are usually fixed in front of workshop
grindstones to support the tools or other objects to be ground.
The ordinary rest consists usually of a fixed bar or bracket extending across the
front of the stone and bolted to the top of the trough. This is set up to within a
short distance from the stone and is immovable when in use. In grinding an
object, it frequently happens that accidents take place and the fingers of the
workman are drawn between the grindstone and the rest the result being usually
severe injury to the hand.
In
My object is to prevent such accidents and to effect this I mount the rest in such
a manner that while it remains as useful as before for general grinding purposes, it
will nevertheless move away from the stone if anything should get between the
stone and the rest so that jambing and consequent accident is scarcely possible.. In.
carrying my invention into effect I provide two side standards or brackets which
are bolted to the top of the trough on each side of and in front of the stone.
the said brackets I form vee shaped recesses the two recesses lying exactly opposite
to each other and being closed on the outer sides of the brackets. Into these
vee shaped recesses I drop the ends of the rest proper which consists of a plate
having a straight top edge bevelled to a convenient grinding angle. On the under
side this rest is hollowed out and the lower edges of the two ends are rounded so as
to rock easily in the foot of the vee recesses. The rest is thus free to rock towards
and away from the stone between the inclined sides of the vee recesses which
limit its movement.
The two side brackets are made so as to be capable of adjustment towards and
from the front of the stone, so that as the stone wears, the rest can follow it up.
The rest is set at such an angle relatively to the circumference of the stone that
even if a wedge shaped object should be dropped between the revolving stone
and the rest, the tendency will be not to jamb but to push the rest outwards
and make it rock over so as to lie away from the stone. This angle of safety
of the rocking rest might be made adjustable to the decreasing circumference
of the stone as it wears, or it might be made fixed and non-adjustable. The
result of my improved arrangement of rest is that if by any possibility a work-
man's fingers should slip between the rest and the stone, the motion of the stone
would fling the rest over into its opposite inclined position and would leave the
fingers or hand free. Apart from this automatic action, even if any slight drawing
in of the fingers were to take place, the sudden plucking away of the hand which
instinctively takes place would turn the rest over and effect a release.
It might be pointed out finally that apart from the prevention of accidents to
the person,
the occasional drawing in and jambing between the rest and the stone
of a tool or other article being ground, results sometimes in deeply scoring the stone
so that it requires to be turned down again to be fit for use. This drawback is also
prevented by the use of my improved non-jambing rest.
Dated this 9th day of June 1901
E. K. DUTTON & Co.,
5, John Dalton Street, Manchester, Agents.

page_text: I JOHN ORMEROD COTTRILL of The Bee Hive Works, Bolton, in the County
of Lancaster, 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 and accompanying drawings :-
My said invention relates to the rests which are usually fixed in front of workshop
grindstones to support the tools or other objects to be ground.
The ordinary rest consists usually of a fixed bar or bracket extending across
the front of the stone' and bolted to the top of the trough. This is set up to
within a short distance from the stone and is immovable when in 'use. In
grinding an object, it frequently happens that accidents take place and the fingers
of the workman are drawn between the grindstone and the rest, the result being
usually severe injury to the hand.
'My object is to prevent such accidents and to effect this I mount the rest in
such a manner that while it remains as useful as before for general grinding
purposes, it will nevertheless move away from the stone if anything should get
between the stone and the rest so that jambing and consequent accident is
scarcely possible.
The invention will be more easily understood by a reference to the annexed
sheet of drawings which clearly illustrate my improved rest.
Fig. 1 is a side elevation of a grindstone and trough to which my improved
rest is shown applied, the rest being shown in position for grinding.
as it
Fig. 2 is a similar view in which the rest is shown in its safety position and as
appears when thrown back.
"Fig. 3 is a front elevation of the grindstone and rest.
Fig. 4 is an enlarged view showing one of the supporting brackets and the rest.
Fig. 5 is a plan view of one of the supporting brackets.
Fig. 6 is a front view of the rest.
In carrying my invention into effect I provide two side standards or brackets a a
which are bolted to the top of the trough bon each side of and in front of the
stone c. In the said brackets I form vee shaped recesses a' as clearly appears
at Figs. 4 and 5 the two recesses lying exactly opposite to each other and being
closed on the outer sides of the brackets (see Fig. 5).
Into these vee shaped recesses I drop the ends of the rest proper which
consists of a plate d having a straight top edge bevelled to a convenient grinding
angle as plainly shown in Fig. 4. On the under side this rest is hollowed out
as shown at Fig. 6 and the lower edges of the two ends d' d' are rounded.so as to
rock easily in the foot of the vee recesses a¹ a¹.
The rest d is thus free to rock towards and away from the stone c between the
inclined sides of the vee recesses a¹ a¹ which limit its movement.
The two side brackets a a are secured by bolts e to the top of the trough, the
bolts passing through slots in the bracket soles the brackets being thus capable of
adjustment towards and from the front of the stone, so that as the stone wears down
the rest can follow it up.
The rest d is set at such an angle relatively to the circumference of the stone,
for example to about the angle shown in Fig. 4, that even if a wedge shaped object
should be dropped between the revolving stone and the rest, the tendency will be
not to jamb the object between the stone and the rest but to push the rest outwards
and make it rock over so as to lie away from the stone in the position indicated in
dotted lines. This angle of safety of the rocking rest d' might be made adjustable
to the decreasing circumference of the stone as it wears, or it might be made fixed
and non-adjustable as in the drawings. The result of my improved arrangement of

page_text: rest is that if by any possibility a workman's fingers should slip between the rest
and the stone, the motion of the stone would fling the rest over into its opposite
inclined position that is to say from the position shown in full lines Fig. 4 to the
position in dotted lines and would leave the fingers or hand free.
Apart from this automatic action, even if any slight drawing in of the fingers
were to take place, the sudden plucking away of the hand which instinctively
takes place would turn the rest over towards the sufferer and effect a release.
It might be pointed out finally that apart from the prevention of accidents to
the person,
the occasional drawing in and jambing between the rest and the stone,
of a tool or other article being ground, results sometimes in deeply scoring the stone
This drawback is also
so that it requires to be turned down again to be fit for use.
prevented by the use of my improved non-jambing rest.
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 improved safety grindstone rest substantially as described and
illustrated.
as
2. The improved safety grindstone rest composed of the plate d rocking loosely
in vee recesses in suitable supporting brackets and arranged and acting for the
purposes and substantially as described and shown.
Dated Och do of forch 1805
E. K. DUTTON & Co.,
5, John Dalton Street, Manchester, Agents.
E. K. DUTTON & Co.,
5, John Dalton Street, Manchester, Agents.