An Improved Case or Shell for Pencils, India-rubber, and other Substances to be Gradually Used Up.
Year: 1896

page_text: Date of Application, 25th Aug., 1896-Accepted, 26th Sept., 1896
COMPLETE SPECIFICATION.
An Improved Case or Shell for Pencils, India-rubber, and other
Substances to be Gradually Used Up.
I, FRITZ SCHELLHASE, of 31, Kaiser Strasse, Magdeburg, in the Province of
Saxony, German Empire, Railway Secretary 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 :-
In pencils and similar articles in which a working-substance to be gradually
used up (for instauce solid ink, india-rubber for lead and ink, and the like) is
encompassed by, or held within, a rigid case or shell that is to be reduced in length
according to the consumption of said working-substance, the shortening of said
case or shell is generally a harder and more inconvenient work than pointing the
working end proper of the said substance, the more so, as said shortening is to be
done in any case, whereas said pointing need generally be effected only with lead,
or with pencils respectively.
In order to do away with the shortening of the case or shell of the articles in
question, especially pencils, there have already been manufactured pencils that
were composed of a number of small or short pencils arranged one behind the other
within a thin walled tube of suitable diameter and length. Each of said short
pencils was provided with its special piece of lead, and the whole rod or bar of
lead consisted therefore of us many pieces as there were short pencils within said
tube. The length and diameter of the intter were correspondent to the length and
diameter of an ordinary pencil. If in such a multipartite pencil the free portion
of the lead of the first or lowermost part had been used up, that part was drawn
out of the tube, and was put upon and pressed into the upper or rear end of the
same, so as thereby to displace all the other parts or short pencils, and to cause the
Becond of them to get into the place of the former first.
Although this appears to be a practical means, there is in fact caused a great
loss in the working-substance proper, because the latter is divided into as many
parts as there are parts in the case or shell, and, in consequence thereof, a certain
portion of each part of the working-substance is to take into the respective part of
the shell. If, for instance, the shell is composed of eight parts, then about 0% of
each part of the working substance must take into the respective part of the shell,
ns otherwise no secure hold is attained. It is thus to be seen that about 50% of
the whole of the working substance gets lost; in other words, the said 50% is
not used by the owner of the respective pencil, the advantage gained by the use of
such a pencil being that the owner does not have to point the Baine.
It results from what has afore been said that a pencil of the kind in question
will endure only about half as long as an ordinary one, and the advantage obtained
on one side is therefore lost on the other side. It is a fact that pencils of the said
kind have met with only a very small sale up to now.
The purpose of my present invention is to do away with the drawback afore
revealed, and I attain that object by composing the shell of a comparatively great
number of pieces or parts which are put upon a common piece of the working
substance, i.e. upon a continuous piece the length of which corresponds to the
length of the whole pencil. 1 pre er to compose the shell of about from 25 to
40 parts, and each of the latter may be drawn off the lead or other working-
substance when its turn comes, i.e. when the respective length of lead has been
consumed.

page_text: In order to obtain a good connection of all the parts of the case, as well as a
sufficient rigidness of the same, or of the pencil respectively, and in order to
provide
at the same time for an easy and convenient separation of the parts,
prefer to wrap or enclose the latter within a tube or piece of transparent
celluloid, which allows the surfaces of contact between either two of the said inner
parta to be seen from the outside of the pencil. If one of the said parts is to be
separated from the other ones, or is to be removed from the pencil respectively,
all that is necessary is to cut the celluloid at the place of the respective surfaces
of contact, when the part thus released may be drawn off the lead or other working
substance without the least difficulty. The lend or other working substance is
thereby freed for a length corresponding to the length or height of the respective
drawn-off part, and it is perfectly obvious that the before mentioned loss of the
lead or other substauce is not incurred in this arrangement.
In order to make my invention more clear, I refer to the accompanying drawings
in which similar letters denote similar parts throughout the different views; and
in which
Fig. 1 is an outer view of a pencil constructed according to my invention;
Fig. 2 shows the same pencil, the free end of the lead being nearly consumed;
Fig. 3 shows another portion of the lead being freed by the removal of a part
of the case;
Fig. 4 is a longitudinal section through the parts shown in Fig. 3; and
Fig. 5 shows my invention applied to a rod of india-rubber.
Before entering into the detailed description of the figures afore enumerated
I shall distinguish for the sake of clearness between the terms "caso" and "shell,"
and I shall use the term "case" for the whole of the small or movable parts
surrounding the working-substance, whereas the term "shell" will be used for the
piece or tube of celluloid surrounding said parts.
The dotted lines a a'a 2... Figs. 1 & 2, indicate the surfaces of contact between
the superposed parts c c c2, Figure 4, of the case, or the places of division
between said parts. If the projecting free portion or point, Figure 1, of the
bar of lead i, Figure 4, has been used up as far as shown in Figure 2 and if
therefore another or the adjacent portion of the lead is to be freed, then the shell n,
Figures 1-4, is cut at the place of the dotted line a and the part of the case
which is thus separated from the other parts of the case, is then drawn off the
projecting portion of the lead, as shown in Figures 3 & 4.
The parts co' o 2. . . of the case are each of cone-like shape, and take one upon or
into the other as is distinctly ropresented in Figure 4, the working end of the
pencil has therefore in any case the proper conical shapo, which will be clear
without any further explanation.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a pencil or similar articlo consisting of a working substance proper
gradually to be used up, and of a case encompassing said substance, the combination
with the latter, of a number of superposed parts forming said case, and being each
adapted to be drawn off said working substance, and of a shell euconipassing said
superposed parts for the purpose as described.
2. ln a
pencil or similar article consisting of a working substance proper
gradually to be used up, and of a case encompassing said substance, the combination
with the latter, of a number of superposed parts forming said case, and being each
adapted to be drawn off' said working substance, and of a shell encompassing said
parts; the said substance and said shell consisting each of one piece, for the
purpose as described..
3. In a pencil or similar article consisting of a working substance proper
gradually to be used up, and of a case eucompassing said substance, the combination
with the latter, of a number of superposed parts forming said caso, and being each

page_text: adapted to be drawn off said working substance, and of a transparent shell
encompassing said superposed parts; for the purpose as described.
4. In a pencil or similar article, consisting of a working substance proper
gradually to be used up, and of a case encompassing said substance, the combination
with the latter, of a number of superposed parts forming said case, and being each
adapted to be drawn off said working substance, and of a shell encompassing said
parts; said shell consisting of a material adapted to be cut by an ordinary knife,
for the purpose as described.
5. In a pencil or similar article consisting of a working substance proper
gradually to be used up, and of a case cucompassing said substance, the combination
with the latter, of a number of superposed parts forming said case, and being each
adapted to be drawn off said working substance; and of a common shell
encompassing all said superposed parts, and consisting of a transparent material
adapted to be cut by an ordinary kuife; the said substance and said shell
consisting ench of one piece, for the purpose as described.
D
Log In 1906
FRITZ SCHELLHASE,
By Geo. Thos. Hyde,
1 Broad Street Buildings, Loudon, E.C., Agent for the Applicant.