An Improved Slate Pencil Sharpener.
Year: 1893

page_text: Date of Application, 4th Aug., 1893
Complete Specification Left, 2nd May, 1894-Accepted, 2nd June, 1894
PROVISIONAL SPECIFICATION.
An Improved Slate Pencil Sharpener.
We, ROBERT WAUGH, of 10, Caerleon Road, Newport in the County of
Monmouth, Engineer, and CHARLES HJALMAR HUSS, of Bute Docks, Cardiff,
in the County of Glamorgan, Ship Chandler, do hereby declare the nature of
this invention to be as follows:-
-
This invention relates to a simple and novel construction of slate pencil.
sharpener.
Our improved pencil sharpener is made of metal in the form of a hollow cone the
interior surface being cut or formed with teeth longitudinally or at any suitable
angle.
:
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The top or apex of the sharpener is open and may also have one or more slits to -
allow of the escape of the dust produced in sharpening the pencil which sharpening
is effected by turning the pencil in the sharpener in the usual manner.
In practice we find that our sharpener can be advantageously manufactured by
stamping it from sheet metal in strips and then cutting the strip into suitable.
lengths which are then formed into the required cylindro-conical shape.
Dated the 4th day of August 1893.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
An Improved Slate Pencil Sharpener.
We, ROBERT WAUGH, of 10, Caerleon Road, Newport in the County of
Monmouth, Engineer, and CHARLES HJALMAR HUss, of Bute Docks, Cardiff,
in the County of Glamorgan, Ship Chandler, 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 a simple and novel construction of slate pencil
sharpener.
Our improved pencil sharpener is made of metal in the form of a hollow cone,
the interior surface being cut or formed with teeth or serrations longitudinally or
at any suitable angle.
The top or apex of the sharpener is open and may also have one or more slits to
allow of the escape of the dust produced in sharpening the pencil.
To enable our invention to be fully understood we will describe how it can be
carried into practice by reference to the accompanying drawing, in which :-
Figure 1 is a side elevation of a slate pencil sharpener constructed according to
our invention :
Figures 2 and 3 are end elevations of the same:
Figure 4 is a plan of the blank from which the sharpener illustrated in
Figures 1, 2 and 3 is formed:
Figure 5 is a section drawn to an enlarged scale and taken on the line 5-5 of
Figure 1 and also shewing a pencil introduced into the sharpener to illustrate
its use.

page_text: a, Figures 1, 2 and 5, is the hollow cone having its interior surface cut or formed
with teeth or serrations, as shewn in Figure 5, and provided with a cylindrical
extension c having a lug d for convenience in handling the sharpener; e, Figure 2,
indicates the opening in the top or apex of the cone a, and f,f,f,fare the slits for
allowing the escape of the dust produced in sharpening the slate pencil, which
sharpening is effected by passing the pencil with one hand into the sharpener and
turning it therein, the sharpener being meanwhile held with the other hand by
means of the lug d when the teeth or serrations 6 will cut or grind away the end
of the pencil to the required form.
In practice we find that our sharpener can be advantageously manufactured by
stamping a blank of the shape shown in Figure 4 from sheet metal forming the
required teeth or serrations 6 thereon, bending the blank into cylindrical shape,
passing the neck g of the lug d into the recess h and bending the free ends of the
tooth-shaped portions i inwards.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. A slate pencil sharpener made of metal in the form of a hollow cone, the
interior surface being cut or formed with teeth or serrations substantially as
hereinbefore described.
2. The improved slate pencil sharpener hereinbefore described and illustrated in
Figures 1, 2, 3 and 5 of the accompanying drawing.
3. The manufacture of slate pencil sharpeners from blanks such as that shewn
in Figure 4 of the accompanying drawing substantially in the manner set forth.
Dated the 2nd of May 1894.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.