Improvements in Apparatus to be Used when Grinding Cutting Tools.
Year: 1889

page_text: Date of Application, 18th May, 1889
Complete Specification Left, 17th Feb., 1890-Accepted, 22nd Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements in Apparatus to be Used when Grinding Cutting
Tools.
I, THOMAS HENRY LEE-WARNER, of Highmoor Vicarage, Henley-on-Thames, in
he County of Oxford, Clerk in Holy Orders, do hereby declare the nature of this
Invention to be as follows:-
This invention has for its object to facilitate the grinding of cutting tools to any
desired bevil or angle.
To support the tool whilst it is being ground I use a horizontal bar or rest like
the rest of a lathe and to permit of this bar being readily raised or lowered or
moved towards or away from the circumference of the stone and of being fixed and
held in any position required I form the bar with an arm descending from it which at
its lower end is forked and made to embrace the upper part of the ordinary wood-
work frame or stand by which the bearings for the axis of the stone are carried.
One arm of the fork has a binding screw screwing through it which can be made
to bear against one side of the stand and so draw the other arm against the opposite
side. When the clamp is not grasping the stand the bar can be set to the required
height either by raising or lowering the clamp or by moving it towards or away
from the stone and then more or less inclining the arm that carries the bar.
In this way a very ready means is provided for adjusting the bar or rest to any
position and consequently for grinding a tool to any angle as when grinding tools
upon a grindstone the angle or bevil to which they are ground depends upon the
distance between the plane in which they are held and a plane parallel therewith
passing through the centre of the stone-so that if the tool is held horizontally whilst
being ground the bevil will depend upon the height at which the rest is set.
This 17th day of May 1889
THOMAS H. LEE-WAKNEK.
COMPLETE SPECIFICATION.
Improvements in Apparatus to be Used when Grinding Cutting
Tools.
I, THOMAS HENRY LEE-WARNER, of Highmoor Vicarage, Henley-on-Thames in
the County of Oxford, Clerk in Holy Orders, 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 has for its object to facilitate the grinding of cutting tools to any
desired bevil or angle.
To support the tool whilst it is being ground I use a horizontal bar or rest like
the rest of a lathe and to permit of this bar being readily raised or lowered or moved
towards or away from the circumference of the stone and of being fixed and held
in any position required I form the bar with an arm or arms descending from it
which at their lower end embrace the upper part of the ordinary woodwork frame or
stand by which the bearings for the axis of the stone are carried. One arm of the
fork has a binding screw screwing through it which can be made to bear against one
side of the stand and so draw the other arm against the opposite side. The bar can
be set to the required height either by raising or lowering it upon the arms by which
it is carried or by raising or lowering the clamp or by more or less inclining
the arms.
In this way a very ready means is provided for adjusting the bar or rest to any

page_text: position, and consequently for grinding a tool to any angle, as when grinding tools
upon a grindstone, the angle or bevil to which they are ground depends upon the
distance between the plane in which they are held and a plane parallel therewith
passing through the centre of the stone-so that if the tool is held horizontally whilst
being ground the bevil will depend upon the height at which the rest is set.
The drawings annexed shew a grindstone tool rest constructed in the manner I prefer
for carrying out iny Invention:
Figure 1 is a front view, Figure 2 a side view and Figure 3 a plan of the rest.
Figure 4 is a perspective view on a smaller scale of the rest fixed in place upon the
top of a wooden stand which carries the bearings for the axis of the stone: Figure 5
is a side elevation of the rest fixed in place on an iron stand.
A. A. are two arms or supports formed each with a flat base to rest on the top of the
two sides of the frame-one on the top of one side and the other on the top of the
other side.
On its inner side each support A has a slotted bar A¹ projecting from it. The bar
projecting from one support made to overlap the bar projecting from the other and
where they overlap they are locked together by a locking bolt B.
The two arms or supports are in this way securely attached one to the other at the
bottom and yet they can be applied to different widths of frame. Or if this is not
required the two supports might be formed together in one piece with a bar A'
connecting them together. Each arm or support has also projecting downwards from
it at the bottom on its outer side a lug C to pass down at the side of the frame which
carries the stone-through one of these is screwed a thumb bolt D and its end made
to bear against the frame and thereby draw the lug on the opposite side firmly against
the opposite side of the frame. In this way the arms or supports A are securely
clamped to the frame.
E is a horizontal bar which near its ends can be clamped by bolts F to the front
end of the arms or supports. The bolts pass through slots formed lengthwise through
these ends so that the bar may be set higher or lower as required. The bolts also
pass through longitudinal slots in the bar E in order to admit of the two arms or
supports being set at any distance apart that may be required.
The front ends of the arms or supports are as shewn inclined to the base in order
that the horizontal bar E may be brought into close contiguity with the upper
part of the stone notwithstanding that the arms or supports are at the bottom tied
together by a cross bar as above described which must necessarily be clear of
the stone.
-
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. A tool rest for grindstones composed of a horizontal bar carried by a descending
arm or arms which at their lower end can be made to clasp the sides of the frame
by which the axes of the stone are carried.
2. A tool rest for grindstones composed of inclined arms or supports clamped.at
their lower end to the upper part of the frame by which the axes of the stone are
carried and a horizontal bar clamped to these inclined arnis or supports in such
a way that the bar can be set at any des red height substantially as described.
3. A tool rest for grindstones constructed substantially as herein before described
and illustrated in the drawing annexed.
Dated this 15th day of February 1890.
CARPMAEL & Co.,
Agents for the Applicant..