Year: 1894

page_text: Date of Application, 9th Oct., 1894
Complete Specification Left, 5th June, 1895-Accepted, 6th July, 1895
A communication by JOSEF DEUTSCHBEIN, of Machine Works, Euskirchen,
Rhenish Prussia, in the Empire of Germany, Manufacturer.
I, WILLIAM PHILLIPS THOMPSON, F:C.S., M.I.M.E., of The Agency for
Foreign Patent Solicitors, 6: Lord Street, Liverpool, and 6, Bank Street,
Manchester both in the County of Lancaster and 323 High Holborn in the
County of Middlesex Civil Engineer, do hereby declare the nature of this
invention to be as follows:-
All the pencil sharpeners hitherto employed have this drawback, that screws
must be unfastened and subsequently fastened up again before the knife or cutter
can be sharpened or a fresh one inserted. When these screws are small slotted
ones it requires a practical man to again properly fasten them and moreover if the
screws have knobs the form of the whole sharpener is unhandy. The knife is
also weakened by the necessary holes for the screws and often snaps at these points
during the hardening. A furtlier not inconsiderable drawback of the sharpeners
hitherto employed is that the knife is fixed unyieldingly in the sheath of the
sharpener. The point of the pencil when being sharpened or the graphite core of
the same is thereby easily broken off at knotty places in the wood which frequently
occur in spite of careful selection of the wood, or when the pencil is pressed
too hard.
1
Now this invention has for its object an improved pencil sharpener which avoids
all the above named drawbacks. It is shown on the accompanying drawing :—
Figure 1 and 3 being end views and
Figures 2 and 4 elevations thereof.
The knife or cutter B which is entirely without holes rests on the flat part of
the holder or sheath A and is retained by a spring loop C attached by its ends to
the holder or case, and engaging with its straight part a longitudinal groove b
of the said knife or cuttor B and thereby retaining the latter with an elastic pressure
in a given position in the holder or sheath. If the knife or cutter B, which in the
drawing is shown with two cutting edges, but may of course be made with only
one, requires to be sharpened or replaced by a new one, it only requires to be
drawn out in the direction of its groove b, when a new one or the same sharpened
can be readily inserted. This will require only a few seconds, and the knife will
stand in exactly the same position, and can be always equally securely fastened,
which is not usually the case with screw fastenings.
If knotty places in the wood are encountered or too much pressure is applied to
the pencil, the elastically held knife yields and the graphite point is very rarely
broken off. This improved pencil sharpener has also this furtlier advantage over
those hitherto employed, that its cost of construction is considerably less.
Dated this 8th day of October 1894,

page_text: A communication by JOSEF DEUTSCHBEIN, of Machine Works, Euskirchen,
Rhenish, Prussia, in the Empire of Germany, Manufacturer.
1, WILLIAM PHILLIPS THOMPSON, F.C.S., M.1.M.E., of The Agency for
Foreign Patent Solicitors, 6, Lord Street, Liverpool,, and 16, Bank Street,
Manchester, both in, the County of Lancaster, 118 New Street, Birmingham, in
the County of Warwick, and 31, High Holborn, in the County of Middlesex,
Civil Engineer, do, hereby declare the nature of this invention and in what
Inanner the same is to be performed, to be particularly described and ascertained.
in and by the following statement:-
?
All the pencil sharpeners hitherto employed have this drawback, that screws
must be unfastened and subsequently fastened up again before the knife or cutter.
can be sharpened or a fresh, one inserted. When these screws are. small, slotted.
ones, it requires a practical man to again properly fasten them, and moreover, if the
screws have knobs the form of the whole sharpener, is unhandy. The knife is
also weakened by the necessary holes for the screws and often snaps at these points:
during the hardening. A further not inconsiderable drawback of the sharpeners
hitherto employed' is that the knife is fixed unyieldingly in the sheath. of the
sharpener. The point of the graphite core of the pencil, when being sharpened,
is thereby easily broken off, at knotty places in the wood, which frequently
occur in spite of careful selection of the wood or when the pencil is pressed
too hard.
Now this invention has for its object an improved pencil sharpener which avoids
all the above named drawbacks. It is shown on the accompanying drawing—
Figures 2, 5 and 6, being end views, and
Figures 1, 3, 4 and 7 elevations thereof...
The knife or cutter B which is entirely, without holes rests on the flat part.of
the holder or sheath A and is retained by a spring loop C attached by its ends to
the holder or case, and, engaging, with its straight, part. a longitudinal groove'ŉ
of the said knife or cutter B and thereby retaining the latter with an elastic pressure
in a given position in the holder or sheath., If, the knife or cutter B, which, in the
drawing, is shown with two cutting edges,, but, may of course be made with ouly.
one, requires to be, sharpened or replaced by a new one, itionly requires to be drawn
out in the direction of its, groove b, when a new one or the same knife sharpened
can be readily inserted. This will require only a few seconds, and, the knife will-
stand in exactly the same position, and can be always equally, securely fastened,.
which is not usually the case with screw fastenings.
If knotty places in the wood are encountered or too much pressure is applied to 3
the pencil, the elastically held knife yields and; the graphite.point is very rarely
broken off: This improved pencil sharpener has also this further advantage over.
those hitherto employed, that its cost of construction is considerably less...
A further improvement in this pencil sharpener consists in forming at the narrow
end of the conical bole D in the sheath A, a widened part.d. This latter allows 4
of any broken graphite points being easily removed.
A further improvement consists in covering one end a of the pencil sharpener
with a removable cap A¹ which may be engraved on its face in order that the
pencil sharpener may also be used as a seal or signet.

page_text: Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is-
1. A pencil sharpener characterised by the knife or cutter which has one or two
cutting edges, being elastically pressed and held fast on the holder or sheath by
means of a spring loop which engages in a longitudinal groove of the knife or
cutter in such a manner that the latter may be easily removed and replaced or a
fresh cutter substituted, substantially as herein before desoribed.
2. A pencil sharpener having the narrow end of the conical hole D. of its sheath
formed with a suitably shaped widened part d into which the knife penetrates and
which allows of broken points being easily removed, substantially as described.
3. A pencil sharpener having at one end a removable cap, which may be
engraved on the face with initials, arms or the like, so that the pencil sharpener
may also serve as a seal or signet, substantially as described.
Dated this 4th.dow of June 1905
WM. P. THOMPSON & Co.,.
Agents.