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:
The invention relates to improvements in pencil lead cases and holders and has
for its object the forward transport of the pencil lead in the pencil receiving tube
by an alternate action of two pencil lead receiving tubes pushing against & being
situated behind each other, the back pencil receiving tube carrying a tightening
ring which is slipped thereon and actuated by coming into contact, on the back
and front, with the interior of the pencil lead casing.
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. 2 and 3 are longitudinal sections showing the forward transport of the
pencil lead & Figs. 4 and 5 are enlarged longitudinal sections of the separate front
and back pencil lead receiving tubes of the case or holder.
In this invention the following is regarded as a novel feature & patentable:―
The combination of the front pencil lead receiving tube a, which is under the
action of a spring, with the back pencil lead receiving tube carrying a sliding
ring? which is actuated by coming into contact, on the back & front, with the
interior of the pencil lead casing, for the purpose of the forward transport of the
pencil lead d, an alternate action of the pencil lead receiving tubes a and b, pushing
against each other and the tightening ring .
In the interior of an ordinary slate pencil casing hare guided, two separate
pencil lead receiving tubes a &b which are under the action of two springs f& f¹
respectively and receive the pencil lead d. Each pencil lead receiving tube is
furnished with the gripping jaws c. c. c. and c¹ c², c¹ respectively and on the back
pencil lead receiving tube, a tightening ring is slipped which comes into contact
on the back & front with the interior of the slate pencil casing h.
The front pencil lead receiving tube a, by means of the spring f tightens the
pencil lead inserted therein in such a manner that the same is held loosely, but
cannot fall out, while it will let the pencil lead d pass, when pushing the back
pencil lead receiving tube b forwards.

page_text: When drawn back and in the normal position the pencil lead d is held fast by
the front gripping jaws c. c. c as well as more particularly by the back gripping
jaws c¹ c¹, c¹ on account of the action of the tightening ring r.
When depressing the head k, the back pencil lead receiving tube b is pushed
forwards, and thereby the inserted pencil lead d is transported forwards through
the front pencil lead receiving tube a which holds it only loosely, until the
tightening ring is arrested, see Fig. 3, and pushes itself off the gripping jaws of
the back pencil lead receiving tube b, freeing also the tightening jaws c¹, c¹, c¹.
During such time the back pencil lead receiving tube band also the front tube a,
viz. its gripping jaws c. c. c. are freed, in order that the pencil lead d may easily
pass through.
If the head is released from the pressure, both pencil lead receiving tubes a & b
will move backwards.
The gripping jaws c. c. c. grip the pencil lead pushed forward and as the back
gripping jaws c¹, c, cl, will only grip when the tightening ring is arrested, through
contact on the back, a. drawing back of the inserted pencil lead does not take
place. By repeating the depression of the head ka renewed forward transport
takes place.
•
The forward transport therefore corresponds with the distance of the two contact
surfaces between which the tightening ring r moves.
After removal of the tightening ring r the holder may also be used without
forward transport.
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
The combination of a front pencil lead receiving tube a, which is under the
action of a spring f, with a back pencil lead receiving tube b, also under the action
of a spring f', with a tightening ring r slipped thereon the movement of which is
controlled through contact on back and front with the interior of the pencil lead
casing, for the purpose of transporting forwards, the pencil lead d, by the alternate
action of the pencil lead receiving tubes a and b pushing against each other, and
tightening ring substantially as set forth.
This all 1000