Apparatus for Sharpening Lead and other Pencils.
Year: 1899

page_text: Date of Application, 31st Aug, 1899-Accepted, 7th Oct., 1899
Apparatus for Sharpening Lead and other Pencils.
I, JOHANNES STÄCKER, Merchant, of Neuerwall 50, Hamburg, Germany, 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 present invention relates to an apparatus for sharpening lead and other
pencils The apparatus consists essentially of a rotary conical cutter, rotating
about an axis parallel to that of the pencil, in bearings carried in a frame. This
frame is provided with a slotted guide to receive the pencil A device is also
provided by means of which an automatic feed of the pencil is obtained.
The invention is, by way of example, represented in the accompanying
drawing:
Figure 1 being a longitudinal section, and
Figure 2 a side view of the complete apparatus, while
Figure 3 represents a view of the pencil in the holder.
To a base-plate d are fixed bearings o and c¹ on which a frame b is capable of
rotating freely This frame is provided with a guiding device e slotted or open
along the surface of contact with a cutter a The cutter a 18 carried by and
capable of revolving in the frame b, its axis is parallel to the axis of the frame
and it is provided, outside the frame b, with a small toothed pinion g gearing with
a toothed wheel adjoining the bearing c¹ The conical cutter a is composed of
a number of discs provided with cutting edges which discs are so placed by the
side of each other that their edges do not form a uniform and continuous edge,
but make a broken line in which various edges become simultaneously effective
thereby reducing the time taken to sharpen the pencil On turning the frame b,
by means of a crank h, in the direction indicated by the arrow, the pencil guide e
and simultaneously with it the cutter a opposite and close to the slit of the said
guide e, rotate round the pencil placed in the guide. Owing to this rotary
movement of the frame b the toothed wheel arranged on the bearing c¹ actuates
the toothed pinion g, keyed on the axle of the cutter a and thus forces the latter
to revolve about its own axis and to cut the wood of the pencil held against it
through the slot or opening in the guide In order to secure the pencil in a
convenient position it is placed between the jaws of the pencil holder repre-
sented in Figure 3. and securely fixed by means of the screw n
This pencil
holder is fixed to a slide o capable of moving relatively to the base plate & and
actuated by means of a spiral spring so arranged that the pencil fixed in the
holder is automatically drawn into the guide e until the holder strikes against
the bearing support c.
The whole of the apparatus is mounted on a convenient foot plate, provided
with the necessary recesses for that part of the apparatus which is below the
base plate d.
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
1. An apparatus for sharpening lead and other pencils by means of a cutter

page_text: characterised by the fact that the axis of the cutter a revolvably arranged in and
on the frame b is parallel to the axis of the pencil and to the axis, coinciding with
the latter, around which the fiame revolves.
2 A form of construction of the apparatus as specified in Claim 1, in which the
revolving frame 6 is provided with a pencil guides having a slot or opening
along the part of it in contact with the cutter.
3. The complete apparatus for sharpening lead and other pencils substantially
as described or illustrated in the accompanying drawings.
BOULT, WADE & KILBURN,
Agents for the Applicant.