Improvements in and relating to Fencil Sharpening Apparatus.
Year: 1898

page_text: Date of Application, 19th Aug., 1898--Accepted, 22nd Oct., 1898
COMPLETE SPECIFICATION.
Improvements in and relating to Fencil Sharpening Apparatus.
I, HERRMANN CARL WILHELM BRENDEL, of No. 6, Alter Steinweg, Hamburg,
Germany, Galvaniser, 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; —
The object of the present invention is an arrangement for the sharpening of
pencils of all kinds such as lead pencils, slate pencils and others, which
mechanism is characterized by the cheapness of its construction and its practical
efficiency. Further, the invention includes a device whereby such pencil sharp-
eners are produced.
The invention is illustrated in the accompanying drawing in which
Figure 1 is a view from above of the pencil sharpener of my invention.
Figure 2 is a side view of the same.
Figure 3 is a view from above of the sharpener producer and
Figure 4 is a side view of the same.
The sharpening arrangement consists essentially of a number of steel knives I
of triangular section and spirally curved and which are drawn together at one
point to form a cone. The point of the pencil is formed at this narrowest part II.
The connection of the separate knives in the system is effected by soldering
or otherwise securing the said knives in a suitable holder III at their narrowest
ends. When in use the pencil to be sharpened is inserted in the device and
revolved according to the cutting position of the knives in the one direction or
in the other, whereby the material to be cut away is removed and the point is
formed immediately. For the construction of the above described pencil sharp-
ening apparatus the frame or last illustrated in the drawing is made use of; this
apparatus consists of a number of divisions corresponding to the number of
knives in the apparatus to be constructed and there are placed around a little
ring fixed in the middle of the disc tangentially adjusted divisions or plates IV
to serve as guides or lasts for the knives to be set up and these guides are also
twisted spirally and secured above in the manner shewn in the drawing. The
application of this apparatus is as follows:-
The knife blades I are placed in the separate spiral cavities formed by the guide
blades, and then the projecting heads of the knife blades are collected by aid of
a ring or a closed cover III or in any other suitable way and soldered or other-
wise securely fixed together.
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. The improved apparatus for sharpening pencils characterized by having a
given number of steel blades I attached to a base plate, said blades having tri-
angular section and being spirally curved and conically tapered towards the
central point in such a manner that the cutting edges of all the blades are

page_text: arranged in the same direction, and the said blades are united into one whole
by means of soldering or otherwise into a ring III so that when the pencil is
inserted in the apparatus and revolved therein, a neat and uniform point is ob-
tained.
2. The above described apparatus for the construction of the pencil sharpening
device set forth in Claim 1 consisting of a disc, provided with a number of divi-
sions equal to the number of knife blades, said divisions being united at one end
and spirally curved and preferably constructed of iron plates IV which can take
up in the cavities between them the knife blades for the construction of the
pencil sharpener aforesaid, and hold them in place during the soldering substan-
tially as described and illustrated in the accompanying drawing.
Total the 10th love of dust 1900
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C., Patent Agents for the Applicant.