Year: 1886

page_text: I, OTTO BUSSLER of Nürnberg in the Empire of Germany Manufacturer 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 relates to improvements in pencil lead cases and holders in
which the pencil lead is pushed forward in the casing for use by turning the head
thereof.
And in order that my invention may be better understood I have caused to
be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
Figs. 1 and 2 are longitudinal sections of the whole of the pencil lead casing or
holder, showing the pencil lead pushed forwards & backwards respectively. Figs. 3
and 3, are a longitudinal and a plan in section respectively showing the pencil
lead receiving tube and casing surrounding it. Fig. 4 is a side view of the spiral
tube.
In this construction, the following is considered to be new and patentable :-
1st The combination of a spiral tube r rotating in the pencil lead casing / with
a slides furnished with a guide pin 8 in such a manner, that when rotating the
spiral tube a forward motion of the slide s¹ and pencil lead placed in front thereof
takes place.
2nd The employment of a slotted pencil lead receiving tube b with contact pin pl
which is guided in the surrounding casing 6' in order that when depressing the
head k, the pencil lead receiving tube b with its pencil lead & can drop forwards.
The inner pencil lead receiving tube b is formed with a longitudinal slot and is
capable of sliding in a slot p in the surrounding casing b', with which it comes
into contact through the pin p'.
On the front end of the surrounding casing b¹ a mouth piece g is screwed which
is provided with gripping jaws c. c. c.
Around the surrounding tube b¹ is placed the spiral tube which is connected
with the head k, in the slot t of which, the pin 8 of the slide 8 moves.
Around this spiral tube there is employed the spring tube e which by means of
the spring is always pressed outwards, pushing the spiral tuber and its head,
outwardly.

page_text: This inner pencil lead mechanism is protected and encased by the outer pencil
lead casing h. When depressing the head k, the whole of the inner pencil lead
mechanism is pushed forwards, see Fig. 2, the gripping jaws c. c. c on the mouth
piece 9 will open themselves, and the inner pencil lead receiving tube b, with the
pencil lead d is permitted to drop down as far as the slot p will permit (see Fig. 1).
To push the inserted pencil lead forward the required length, the head is
turned and with it the spiral tube r, in order that the pin 8 of the slot s¹ will be
pushed forward, and the latter also pushes forward the pencil lead d as much as
may be required for writing (see Fig. 1).
By the return motion or turning of the head, k, or spiral tuber, the pin 8 is
moved back with the slide 81, (Fig. 2) and the inserted pencil lead d with pencil
lead receiving tube b is permitted to drop back into the pencil lead tube, by
depressing the head k.
Having now described and ascertained the nature of this invention, and in what
manner the same is to be performed I declare that what I claim, is
In pencil lead cases or holders.
1st The combination of a spiral tuber rotating in the pencil lead tube h with a
slides provided with a guide pin,s for the purpose, when turning the spiral tube r,
of causing a forward motion of the slide s', and of the pencil lead placed in front
of it, as set forth.
2nd In the described combination the employment of a slotted pencil lead
receiving tube b, with contact pin p¹ which is guided in the surrounding tube b¹,
for the purpose of permitting the pencil lead receiving tube b, and pencil lead in
front of the same, to drop forwards on depressing the bead k.