An Improved Slate Pencil Sharpener.
Year: 1891

page_text: Date of Application, 11th July, 1891
Complete Specification Left, 9th Apr., 1892-Accepted, 14th May,
1892
PROVISIONAL SPECIFICATION.
An Improved Slate Pencil Sharpener.
We, ADOLPH MYERS, and LEOPOLD MYERS, of the firm of M. Myers and Son,
of Charlotte Street, in the City of Birmingham, Steel Pen Manufacturers, do
hereby declare the nature of this invention to be as follows:-
:-
This invention consists in the herein described improved slate pencil sharpener
which is adapted for attaching to the wooden or other frame of a writing slate,
and consists of a strip or piece of sheet steel or other hard metal or alloy roughened
on its outer surface by cross teeth or other projections which are raised thereon
by means of dies worked in a stamping press or otherwise. These teeth or
projections form the rubbing surface against which the slate pencil is sharpened
by rubbing in the usual way. The sides of the roughened piece or strip are by
preference shaped to form a clip or clips and turned upwardly and bent towards
each other so as to grip the slate frame and thus be attached thereto and as the
said sides can be sprung either nearer together or farther apart they will hold
equally well on elate frames of different thicknesses.
.
Or instead of the said slate pencil sharpener being made to clip the frame the
projecting sides may be dispensed with and the sharpener be fixed by small tacks
nails or screws; or pointed prongs or pieces may be bent up at right angles to
the back of the pencil sharpener which prongs or picces can be driven into the
wooden or other slate frame and thus fix the pencil sharpener thereto.
The roughened rubbing face of the said pencil sharpener is by preference
slightly hollowed so as the better to suit the round formn of the slate pencil.
.
· Dated this 10th day of July 1891.
CHARLES BOSWORTH KETLEY,
Agent for the Applicants.
COMPLETE SPECIFICATION.
An Improved Slate Pencil Sharpener.
We, ADOLPH MYERS, and LEOPOLD MYERS, of the firm of M. Myers and Son,
of Charlotte Street, in the City of Birmingham, Steel Pen Maniifacturers, 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 consists in an improved slate pencil sharpener which is adapted
for attaching to the wooden or other frame of a writing slate and is formed as
herein described with reference to the accompanying drawing on which
Figs. 1, 2 and 3 shew a slate pencil sharpener constructed according to this
invention attached to a writing slate frame;
Figs. 4, 5 and 6, represent, respectively in side and end elevation and in plan the
said pencil sharpener on an enlarged scale;
Fig. 7 is a sectional side elevation of the same;
Fig. 8 illustrates a modification of our invention and
Figs. 9 and 10 a further modification of our invention.
Referring firstly more particularly to Figs. 1 to 7 both inclusive our improved
slate pencil sharpener consists of a strip or piece a of sheet steel or other hard
sheet metal or alloy roughened on its outer surface by cross teeth which are
raised thereon by dies worked in a press. It will be seen that these cross teeth
are formed by slitting the central strip partly across from the centre at regular
CD
1

page_text: intervals the bars between the slits being bent into an inclined direction (as shewn
more clearly in Fig. 7) so that their up turned edges form a series of cross teeth b
which together constitute the rubbing surface against which the slate pencil is
sharpened by rubbing to and fro in the usual way. This roughened surface is by
preference slightly hollowed (see Figs. 3 and 5) so as the better to suit the round
form of the slate pencil. The sides of the roughened piece or strip a are by
preference shaped with outwardly projecting parts cccc which are bent up
towards each other (see Figs. 3 and 5) and thus form clips so as to grip the slate
frame D and tlius be attached thereto. As the sides e' can be sprung either
nearer together or further apart they will hold equally well on sinte frames of
different thicknesses.
Instead of the said slate pencil sharpener being made to clip the slate frame as
above described and shewn with reference to Figs. 1 to 7- both inclusive the
projecting sides c²² ce may be dispensed with and the pencil sharpener be fixed
by small nails or tacks which pass through the holes e (Fig. 8); or as shewn in
Figs: 9 and 10 pointed prongs or pieces may be bent up at right angles to
the back of the pencil sharpener which prongs or pieces can be driven into
the wooden or other slate frame and thus fix the pencil sharpener thereto.
The pencil sharpeners shewn by Figs. 1, 2, 3, 4, 5, 6 and 7 and by Figs. 9 and 10
may have their roughened rubbing surface formed in other ways than by the
inclined cross ribs without departing from the nature of our invention, as for
instance the rubbing surface in these pencil sharpeners may be formed like nut-
meg graters in combination with the clips or the spikes for fixing the pencil
sharpener to the slate frame.
Having now particularly described and ascertained the nature of our inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
"
1. In a slate pencil sharpener the construction and use of the improved rubbing
surface consisting of a piece or strip of sheet steel or other hard sheet metal or
alloy formed into a series of inclined cross bars for the purpose and substantially
as hereinbefore set forth.
2. In a slate pencil sharpener the use of side projecting parts forming a clip or
clips adapted to grip a slate frame between them and attach the slate pencil
sharpener thereto in the manner and substantially as hereinbefore described and
illustrated by Figs. 1, 2 and 3 of the accompanying drawing.
3. The improved slate pencil sharpener hereinbefore described and illustrated
by Figs. 1, 2, 3, 4, 5, 6 and 7 and the modificatious hereinbefore described' and
shewn by Fig. 8 and by Figs. 9 and 10 of the accompanying drawing.
Dated this 8th day of April 1892.
:
CHARLES BOSWORTH KETLEY,
Agent for the Applicants.